Radiation dose chest ct images doses. Medical search. Frequent questions

Patients want to know if radiation from mammograms , bone density tests , computed tomography (CT) scans, and so forth will increase their risk of developing cancer. (harvard.edu)
Computed tomography imaging, called CT, is a diagnostic process that is said to utilize special x-ray equipment to acquire cross-sectional images of the body that could offer comprehensive pictures of organs, bones, and other tissues. (healthjockey.com)
In Australia there are now over 80 000 1 computed tomography (CT) scans performed on children and young people under the age of 20 every year. (arpansa.gov.au)
The role of chest computed tomography (CT) as a surveillance tool in children with high-risk neuroblastoma. (qxmd.com)
General staging should be carried out to assess the extent of distant disease, including bone scintigraphy, chest radiographs and computed tomography (CT), whole-body magnetic resonance imaging (MRI), and positron emission tomography (PET)-CT or PET-MRI. (medscape.com)
Importance: Computed tomography (CT) radiation doses vary across institutions and are often higher than needed. (mssm.edu)
Computed tomography (CT)-estimated dimensions of the airway lumen and wall, and accompanying pulmonary artery. (ersjournals.com)
In early 2011 NIOSH posted a blog entry commenting on the preliminary results from the National Lung Screening Trial (NLST), funded by the National Cancer Institute, that found a 20.3% reduction in deaths from lung cancer among current or former heavy smokers who were screened with low-dose helical computed tomography (CT) versus those screened by chest X-ray (CXR). (cdc.gov)
Within radiology, the use of computed tomography (CT) has greatly increased in recent years. (lu.se)
Most of the guidelines recommend offering annual screening with low-dose computed tomography (LDCT) scanning to patients aged 50 to 80 years who have at least a 20 pack-year smoking history and either continue to smoke or have quit within the past 15 years. (medscape.com)
Cardiovascular Imaging, Naval Medical Center Portsmouth, Board of Di- go to the ACR website at www.acr.org/ac to confirm that you are accessing rectors, Society of Cardiovascular Computed Tomography. (bvsalud.org)
Recent radiologic literature regarding COVID-19 has primarily focused on Computed Tomography (CT) chest findings, with chest radiography lacking in comparison. (bvsalud.org)

Enhanced noise suppression of newer iterative image reconstruction techniques provides diagnostically adequate CT enterography examinations at very low radiation dose," Kaza concluded. (auntminnie.com)
Smith-Bindman, who also is a UCSF professor of epidemiology and biostatistics and obstetrics, gynecology and reproductive sciences, commented, "Our study provides some initial data documenting the doses that patients receive when they undergo actual CT examinations and this is different than the doses when phantoms-sophisticated plastic models typically used to quantify CT scanner dose-are used. (healthjockey.com)
Examinations performed at just 70 kilovolts with a current of up to 825 milliamps, for instance, can significantly reduce X-ray dose and the amount of contrast medium required. (siemens-healthineers.com)
In many CT examinations, incorrect patient positioning is an obstacle to achieving optimal results. (siemens-healthineers.com)
Tin Filter technology can be used in all routine examinations and allows users to perform CT imaging at very low dose values which, in the case of lung cancer screening for instance, do not exceed those of a normal X-ray examination. (siemens-healthineers.com)
In practice, diagnostic examinations, including fluoroscopy, rarely result in a dose to the conceptus as high as 50 mGy. (diagnosticimaging.com)
Radiation dose indices for single-phase noncontrast head CT examinations in patients 18 years of age and younger were retrospectively reviewed between July 2011 and June 2016 using the American College of Radiology CT Dose Index Registry. (ajnr.org)
Α software system is being produced that provides a) image quality information and b) accurate estimation of patient organ doses from chest CT examinations (CTRad). (myesr.org)
CT is associated with higher radiation doses than other radiation-based medical examinations such as plain radiography and most nuclear medicine examinations. (lu.se)
Disclaimer: The ACR Committee on Appropriateness Criteria and its expert panels have developed criteria for determining appropriate imaging examinations for diagnosis and treatment of specified medical condition(s). (bvsalud.org)

Automated heart measurements captured from CT scans can flag people at high risk of major cardiovascular events due to cardiomegaly. (auntminnie.com)
Over 80 million CT scans are performed in the United States each year, compared with just three million in 1980. (harvard.edu)
These studies show a slightly but significantly increased risk of cancer in those exposed to the blasts, including a group of 25,000 Hiroshima survivors who received less than 50 mSv of radiation - an amount you might get from three or more CT scans. (harvard.edu)
The experts approximated the amount of CT scans that could lead to cancer varied broadly by sex, age, and kind of scan. (healthjockey.com)
They estimated that it could take less CT scans to result in cancer among women as opposed to men. (healthjockey.com)
In addition, the scanner is equipped with TwinBeam Dual Energy scan modes and the Tin Filter technology that facilitates CT scans at very low doses by shielding patients from clinically irrelevant radiation. (siemens-healthineers.com)
CT scans are X-ray procedures where multiple images are rapidly taken and compiled into complete cross-sectional 'slices' of soft tissue, bone and blood vessels. (arpansa.gov.au)
CT scans can show parts of the body that are obscured by other tissues on a standard X-ray image. (arpansa.gov.au)
Therefore, CT scans often result in earlier diagnosis and more successful treatment of many diseases such as intracranial injury and cancer. (arpansa.gov.au)
How can I minimise radiation exposure from CT scans in children? (arpansa.gov.au)
Size specific dose estimates for CT scans of the chest, abdomen, and pelvis were used to estimate absolute organ doses to 23 organs. (qxmd.com)
three were symptomatic and two were asymptomatic with normal chest MIBG scans but avid bone disease. (qxmd.com)
Imaging has evolved significantly over the years, from early X-ray machines to advanced modalities like MRI, CT scans, and PET scans. (popherald.com)
CT scans combine X-ray technology and computer processing to create detailed cross-sectional images of the body. (popherald.com)
CT scans are ideal for evaluating trauma, diagnosing cancers, and visualizing complex bodily structures, such as the brain and organs within the chest and abdomen. (popherald.com)
CT scans involve higher radiation doses compared to radiography. (popherald.com)
The radioactive tracers used in PET scans expose patients to a minimal amount of radiation, with the benefits often outweighing the risks. (popherald.com)
1 , 2 A more recent study using the American College of Radiology Dose Index Registry (DIR) reported that approximately 6% of CT scans performed in participating facilities the United States were performed on children. (ajnr.org)
3 CT scans alone accounted for about 50% and 75% of the radiation doses in adults and in children, respectively. (ajnr.org)
5 , 6 In the past 2 decades, there has been an increase in the use of CT scans in pediatric patients in emergency departments, which includes both first-time and repeat head CT scans. (ajnr.org)
I'm thinking things like X-rays and CT scans, we're using a dose that's useful to us in terms of imaging the person but not sufficiently large that we're going to cause a big increase in risk of them actually getting a cancer. (thenakedscientists.com)
So doctors always try to minimise the dose of radiation that we need and not put people through scans that they don't need. (thenakedscientists.com)
Main Outcomes and Measures: Primary outcomes were the proportion of high-dose CT scans and mean effective dose at the facility level. (mssm.edu)
Results: Across 100 facilities, 864080 adults underwent 1156657 CT scans. (mssm.edu)
The multicomponent intervention significantly reduced proportions of high-dose CT scans, measured using effective dose. (mssm.edu)
001). Reductions in the proportions of high-dose scans were greater when measured using organ doses. (mssm.edu)
The absolute reduction in the proportion of high-dose scans was 6.0% to 17.2%, reflecting 23% to 58% reductions in the proportions of high-dose scans across anatomical areas. (mssm.edu)
001) CT scans. (mssm.edu)
Audit feedback alone reduced the proportions of high-dose scans and mean dose, but reductions in observed dose were smaller. (mssm.edu)
The original CT scans designed to assess airway structure involved thin-slice images (typically 1-2 mm axial), which were acquired using a "stop and shoot" protocol and were reconstructed using an edge-enhancing algorithm, known as the high-resolution CT (HRCT) protocol. (ersjournals.com)
The diagnostic evaluations mainly consisted of further imaging: diagnostic CT, PET-CT scans and chest radiography. (cdc.gov)

Radiography is a widely used imaging technique that utilizes X-rays to visualize internal body structures. (popherald.com)
Exposure to ionizing radiation is a potential risk, but modern radiography techniques use low doses to minimize the effects. (popherald.com)
Digital radiography has replaced conventional film-based techniques, offering immediate image previews, better contrast resolution, and easier storage and retrieval of images. (popherald.com)
7. Estimation of foetal radiation dose in a comparative study of pelvimetry with conventional radiography and different computer tomography methods. (lu.se)
None of the guidelines recommend using chest radiography or sputum cytology to screen asymptomatic patients for lung cancer. (medscape.com)
To describe and quantify the imaging spectrum on chest radiography using a severity index, and to correlate the severity of disease with prognosis. (bvsalud.org)

Secondary outcomes were organ doses. (mssm.edu)
Larger reductions in mean organ doses were 8% to 43% across anatomical areas. (mssm.edu)
Conclusions and Relevance: For imaging facilities, detailed feedback on CT radiation dose combined with actionable suggestions and quality improvement education significantly reduced doses, particularly organ doses. (mssm.edu)

The new single-source SOMATOM Edge Plus 1 system provides a powerful imaging chain for scanning obese patients with diagnostic confidence by enabling sharp and rich-in-contrast images at high speed and low dose. (siemens-healthineers.com)
In a study published in April in Radiology, for example, researchers at the University of Texas M.D. Anderson Medical Center warned women not to dismiss symptoms of breast cancer during pregnancy and to seek assessment with diagnostic imaging techniques. (diagnosticimaging.com)
Technological advancements have led to improved image quality, reduced radiation exposure, and enhanced diagnostic capabilities. (popherald.com)
Radiologists should manage the radiation dose for pediatric patients to maintain reasonable diagnostic confidence. (ajnr.org)
The 57-month MEDIRAD project aims to enhance the scientific bases and clinical practice of radiation protection in the medical field and thereby addresses the need to better understand and evaluate the health effects of low-dose ionising radiation exposure from diagnostic and therapeutic imaging and from off-target effects in radiotherapy. (myesr.org)
Among those who did have complications, 16 participants screened with low-dose helical CT (10 of whom had lung cancer) and 10 X-ray participants (all with lung cancer) died within 60 days of a follow-up invasive diagnostic procedure. (cdc.gov)
The challenge is to establish sufficient image quality for a specific diagnostic task with the lowest effective dose to the patient. (lu.se)
La présente étude consistaità évaluer le diagnostic clinique de la radiographie pulmonaire et la résistance à la rifampicine, des patients admis en urgence et suspect de TBP dans l'Hôpital provincial de Bongor. (bvsalud.org)

The study team supposedly concentrated on approximated radiation exposure linked to the 11 most general kinds of CT procedures in clinical practice in the U.S. and the possible cancer danger related to each type. (healthjockey.com)

Cumulative radiation doses from repeated CT enterography in patients with inflammatory bowel disease can be very high, so efforts to reduce radiation dose with new dose reduction techniques are needed," explained Dr. Ravi Kaza from the University of Michigan. (auntminnie.com)
A CT-guided, minimally invasive procedure called a stellate ganglion block shows promise for restoring the sense of smell in patients suffering with long COVID, according to research to be presented at the upcoming RSNA meeting. (auntminnie.com)
Yet radiation dosages that patients are given from the latest CT scanners appear to have gone mainly unregulated. (healthjockey.com)
We believe documenting the actual doses that patients are exposed to is the first step to reducing those doses and any attendant risk. (healthjockey.com)
The study is claimed to be the first large-scale test of radiation doses given to patients who went though a diverse kinds of CT procedures. (healthjockey.com)
Steadiness of radiation doses across patients and facilities through federal legislation and FDA fail to specify how CTs could be securely conducted. (healthjockey.com)
Ultrasound and MRI do not involve any ionising radiation, but may involve other risks and may not be appropriate for all patients or conditions. (arpansa.gov.au)
Heightened concern about radiation exposure could make some patients miss necessary treatment. (diagnosticimaging.com)
This study examines chest CT in pediatric patients with high-risk neuroblastoma. (qxmd.com)
Medical records and imaging from 88 patients with high-risk neuroblastoma, diagnosed at St. Jude Children's Research Hospital between January, 2002 and December, 2009, were reviewed. (qxmd.com)
Eleven patients (14%) developed thoracic disease progression/recurrence identified by chest CT (1 paraspinal mass, 1 pulmonary nodules, and 9 nodal). (qxmd.com)
For patients with non-thoracic high-risk neuroblastoma at diagnosis, omission of surveillance chest CT imaging can save 35-42% of the radiation burden without compromising disease detection. (qxmd.com)
Ultrasound is non-invasive and does not involve ionizing radiation, making it safe for use during pregnancy and for pediatric patients. (popherald.com)
ABSTRACT Previous studies have shown that physicians tend to underestimate the risks to patients of radiation exposure. (who.int)
Les pratiques des médecins en termes de fréquence d'utilisation des examens radiologiques routiniers et de discussion sur les risques avec leurs patients étaient aussi médiocres. (who.int)
The registry included 295,296 single-phase pediatric noncontrast head CT studies from 1571 facilities (56% in male patients and 53% in children older than 10 years of age). (ajnr.org)
In patients older than 40 years, preferred regimens often combine doxorubicin, cisplatin, and ifosfamide without high-dose methotrexate. (medscape.com)
Objective: To assess the effectiveness of 2 interventions to reduce radiation doses in patients undergoing CT. (mssm.edu)
A summary of available imaging tests for low-, intermediate-, and high-risk asymptomatic patients is outlined in this document. (bvsalud.org)
Method: Retrospective review of chest radiographs and laboratory records in patients admitted to a South African tertiary hospital with confirmed COVID-19 infection. (bvsalud.org)
The present study was aimed to report the clinical diagnosis of chest X-ray and resistance to rifampicin, of patients admitted urgently and suspected of TBP in the Provincial Hospital of Bongor. (bvsalud.org)

For most women, there's very little risk from routine x-ray imaging such as mammography or dental x-rays. (harvard.edu)
Trends in mammography dose and image quality 1974-2009 [online]. (cdc.gov)

However, all these benefits come with an increased exposure to ionising radiation which has been linked to an increased risk of cancer. (arpansa.gov.au)

The benefits of these tests, when they're appropriate, far outweigh any radiation-associated cancer risks, and the risk from a single CT scan or nuclear imaging test is quite small. (harvard.edu)
For a regular head CT scan at a similar age, the approximated threat was supposedly 1 in 8,100 for women and 1 in 11,080 for men. (healthjockey.com)
The study team is said to have applied 'effective dose' to measure the radiation exposure linked to every CT scan as it is seen to be one of the most regularly accounted measurements. (healthjockey.com)
According to Smith-Bindman, as opposed to other imaging processes, the median effective dose provided through one CT scan appeared to be as high as 74 mammograms or 442 chest x-rays. (healthjockey.com)
With a scan mode that is not different to a routine CT examination, TwinBeam Dual Energy can therefore acquire two image datasets that provide additional information about the tissue. (siemens-healthineers.com)
What is a CT scan? (arpansa.gov.au)
Recent studies indicate that the statistical risk of developing cancer from a CT scan is about one in a thousand, however our knowledge is still evolving about the extent of the risk. (arpansa.gov.au)
We carefully adjust the amount of radiation to make it optimal for your weight and age, and we have special software that adjusts the dose to match the thickness of each section that is imaged on a CT scan. (radnet.com)
So the energies that we use are much less, but every dose of radiation we gave - whether that's an X-ray or a CT scan - does give some radiation, which in theory could cause damage at a very low level in cells. (thenakedscientists.com)
Dose received during a typical CT (Computerized Tomography) scan. (cdc.gov)

They then assessed the procedures in three anatomic areas like head and neck, chest, and abdomen and pelvis. (healthjockey.com)
Design, Setting, and Participants: This randomized clinical trial included 864080 adults older than 18 years who underwent CT of the abdomen, chest, combined abdomen and chest, or head at 100 facilities in 6 countries from November 1, 2015, to September 21, 2017. (mssm.edu)

platform's advantages in advanced clinical fields such as emergency medicine, interventional radiology (with Guide&GO, the first tablet-based solution for CT-guided interventions), and even cardiology, which is a major growth area for many healthcare providers because of the sharp rise in coronary CT angiography. (siemens-healthineers.com)
Use of CT as a first-line imaging study has increased as multislice scanners have become widely available, and the threshold for performing CT has become lower across all patient groups, said Dr. Donald Frush, director of pediatric radiology at Duke University Medical Center. (diagnosticimaging.com)
A missed appendicitis is potentially devastating to both maternal and fetal health,' said Dr. Tracy Jaffe, an assistant professor of radiology in Duke's abdominal imaging section. (diagnosticimaging.com)
Various medical specialties, such as radiology, nuclear medicine, and oncology, heavily rely on imaging for accurate diagnoses and treatment. (popherald.com)
As a result, all of our centers are accredited for both pediatric and adult procedures by the American College of Radiology (ACR), a national organization that sets the standards for medical radiation procedures in the U.S. (radnet.com)
Learn more about our participation in campaigns initiated by imaging industry groups like the American College of Radiology and the Radiological Society of North America. (radnet.com)
Phexell E, Söderberg M, Bolejko A. International Journal of Radiology & Radiation Therapy. (lu.se)
Effective dose equivalent and effective dose: Comparison for common projections in oral and maxillofacial radiology. (cdc.gov)

How much of this so-called background radiation you are exposed to depends on many factors, including altitude and home ventilation. (harvard.edu)
whereas a head CT delivers approximately 2 mSv which is equivalent to more than one year of natural background radiation. (arpansa.gov.au)
All of us are exposed to some background radiation just by going about our daily lives. (radnet.com)
Radiation dose from a general CT examination of the thorax is approximately five times the natural background radiation a person is exposed to in a year. (lu.se)

Radiation doses from CT enterography can be dramatically reduced with the use of iterative reconstruction. (auntminnie.com)
Advanced reconstruction schemes such as MBIR ( GE Healthcare ) do better at maintaining image quality at ultralow doses than earlier algorithms such as adaptive statistical iterative reconstruction (ASIR, GE), according to Michigan researchers. (auntminnie.com)
Dual-energy CT and iterative reconstruction techniques have improved image quality, reduced radiation exposure, and allowed for functional imaging. (popherald.com)
2. Six iterative reconstruction algorithms in brain CT: a phantom study on image quality at different radiation dose levels. (lu.se)

Radiologists are reading more cardiac CT exams, but not cardiac MRI, according to research presented November 29 at the RSNA meeting. (auntminnie.com)
These criteria are intended to guide radiologists, radiation oncologists and referring physicians in making decisions regarding radiologic imaging and treatment. (bvsalud.org)

Consequently it is of great importance to minimize radiation doses. (lu.se)

Many attempts have been made to quantify risks associated with ionizing radiation use in medical imaging. (ajnr.org)

In this particular example, CT revealed a ruptured appendix following an inconclusive ultrasound and was clearly of great benefit, according to Cynthia McCollough, Ph.D., an associate professor of radiologic physics at the Mayo Clinic in Rochester, MN, during a presentation at Stanford University's Symposium on Multidetector-Row CT in June. (diagnosticimaging.com)
Nonionizing imaging alternatives are thought to be safer, although potential risks from ultrasound waves to the fetus have recently come to light (see accompanying article). (diagnosticimaging.com)
Ultrasound imaging, also known as sonography, uses high-frequency sound waves to generate real-time images of the body's structures. (popherald.com)

There also appeared to be a 13-fold variation between the maximum and lowest radiation dose for every kind of CT procedure. (healthjockey.com)
For instance, they estimated that around 1 in 270 women who experienced a CT coronary angiogram at age 40 years could get cancer from the procedure, as opposed to 1 in 600 men. (healthjockey.com)
If we have any questions about a procedure your doctor ordered, we may call him or her, and, when appropriate, we may suggest a way to get good test results with less radiation dose. (radnet.com)
We adhere to the American College of Radiology's recommendations to Image Gently whenever children receive an imaging procedure, meaning that we are especially careful to keep their radiation doses low. (radnet.com)

The American College of Obstetricians and Gynecologists has noted that, based on available data, an absorbed dose of less than 50 mGy has not been shown to increase fetal anomalies or pregnancy loss. (diagnosticimaging.com)

New research offers a framework for determining whether older adults who have fallen need CT imaging. (auntminnie.com)
But we have no clinical trials to guide our thinking about cancer risk from medical radiation in healthy adults. (harvard.edu)
Radiation exposure is a concern in both adults and children because of an increased risk of cancer, however there are two unique considerations in children: 1. (arpansa.gov.au)

PCCT improves the contrast-to-noise ratio of vascular structures imaged on chest CT when compared with conventional CT and reduces radiation dose. (auntminnie.com)
The radiation you get from x-ray, CT, and nuclear imaging is ionizing radiation - high-energy wavelengths or particles that penetrate tissue to reveal the body's internal organs and structures. (harvard.edu)
This technique has promise as an early-detection technology for chronic lung diseases and imaging technique for processes and structures reliant on dissolved gases. (wikipedia.org)
Imaging refers to the production of visual representations or pictures of internal body structures or organs for clinical analysis or medical intervention. (popherald.com)

Even the advent of spiral CT scanners, where the images can be acquired while the table continuously moves, did not change this approach significantly. (ersjournals.com)

Of the various modalities, CT rings the most alarm bells when it comes to imaging pregnant women, just as it does in the general population. (diagnosticimaging.com)
Neuroblastoma progression/recurrence in the chest is rare and often presents with symptoms or is identified using standard non-CT imaging modalities. (qxmd.com)

Most X-rays, including mammograms and bone density tests, have very small amounts of radiation. (radnet.com)
Despite recent media reports, radiation exposure to the thyroid from mammograms is extremely low. (radnet.com)

Most of what we know about the risks of ionizing radiation comes from long-term studies of people who survived the 1945 atomic bomb blasts at Hiroshima and Nagasaki. (harvard.edu)
What are the risks associated with radiation exposure for children? (arpansa.gov.au)
The answer depends on the clinical indication and a determination of whether the test's benefits outweigh the very small potential risks of prenatal ionizing radiation exposure. (diagnosticimaging.com)
As with other patient groups, a balance must be struck between perceived risks and benefits of imaging during pregnancy. (diagnosticimaging.com)
Data about the risks of fetal exposure to radiation are drawn mainly from studies of female survivors of the U.S. atomic bomb attacks on Japan. (diagnosticimaging.com)
2] National Research Council of the National Academies, Committee to Assess Health Risks from Exposure to Low Levels of Ionizing Radiation. (cdc.gov)
Health risks from exposure to low levels of ionizing radiation: BEIR VII, Phase 2 [online]. (cdc.gov)

Using a deep-learning algorithm with coronary CT angiography effectively predicts the success of percutaneous recanalization of CTO lesions. (auntminnie.com)

The computer reconstructs cross-sectional images from the collected data. (popherald.com)
However, were approached and gave permission the use of ionizing radiation such as X- A cross-sectional study design was for the authors to conduct the study. (who.int)

Evaluation of automatic exposure control in CT to achieve a desired level of image quality and to reduce radiation dose 1 (Figure 1). (lu.se)

Hyperpolarized 129Xe gas magnetic resonance imaging (MRI) is a medical imaging technique used to visualize the anatomy and physiology of body regions that are difficult to image with standard proton MRI. (wikipedia.org)
129Xe is preferred over 131Xe for MRI because 129Xe has spin 1/2 (compared to 3/2 for 131Xe), a longer T1, and 3.4 times larger gyromagnetic ratio (11.78 MHz/T). Xenon Xe 129 hyperpolarized, sold under the brand name Xenoview, is a hyperpolarized contrast agent indicated for use with magnetic resonance imaging (MRI) for evaluation of lung ventilation, and approved for people aged 12 years of age and older. (wikipedia.org)
MRI uses a strong magnetic field and radio waves to produce highly-detailed images of the body's soft tissues. (popherald.com)

As per the findings from the study, depending on the place and procedural constraints of the individual CT scanner, the effective dose given to a patient could considerably surpass the median. (healthjockey.com)
The median volume CT dose index was 33 mGy (interquartile range = 22-47 mGy). (ajnr.org)
The volume CT dose index was lower in children's hospitals (median, 26 mGy) versus academic hospitals (median, 32 mGy) and community hospitals (median, 40 mGy). (ajnr.org)
There was a lower volume CT dose index in level I and II trauma centers (median, 27 and 32 mGy, respectively) versus nontrauma centers (median, 40 mGy) and facilities in metropolitan locations (median, 30 mGy) versus those in suburban and rural locations (median, 41 mGy). (ajnr.org)
Median dose indices and practice variations at pediatric facilities were both lower compared with other practice settings. (ajnr.org)

We're exposed to small doses of ionizing radiation from natural sources all the time - in particular, cosmic radiation, mainly from the sun, and radon, a radioactive gas that comes from the natural breakdown of uranium in soil, rock, water, and building materials. (harvard.edu)
Dose from high altitude solar and cosmic radiation during a flight from New York City to Los Angeles. (cdc.gov)

One of the enhancements in CT technology has apparently been the drastic reduction in the speed it consumes to finish a CT test. (healthjockey.com)
the NLST is the first randomized trial to show a significant reduction in mortality from lung cancer with low-dose CT screening. (cdc.gov)
Evaluation of iterative CT reconstruction for image quality improvements and dose reduction 2, 3 (Figure 2). (lu.se)
Evaluation of iterative algorithms for metal artifact reduction in CT (Figure 3). (lu.se)

There's always questions about radiation exposure from medical imaging. (harvard.edu)
Exposure to ionizing radiation from natural or background sources hasn't changed since about 1980, but Americans' total per capita radiation exposure has nearly doubled, and experts believe the main reason is increased use of medical imaging. (harvard.edu)
The proportion of total radiation exposure that comes from medical sources has grown from 15% in the early 1980s to 50% today. (harvard.edu)
The atomic blast isn't a perfect model for exposure to medical radiation, because the bomb released its radiation all at once, while the doses from medical imaging are smaller and spread over time. (harvard.edu)
Based on this research, possible harmful effects of medical imaging include prenatal death, retardation, physical defects, and childhood cancer. (diagnosticimaging.com)
The National Council on Radiation Protection and Measurements and other organizations consider a dose to the human conceptus below 50 mGy as an acceptable risk in a trade-off with the potential medical benefit of the examination to the patient. (diagnosticimaging.com)
For most people, occasional imaging procedures throughout their lifetime won't be an issue, but doctors must balance the valuable medical information from these procedures against the slight increased risk that too much radiation may cause. (radnet.com)
An important area for a medical physicist is the optimization of the radiation dose and image quality. (lu.se)
7] Mettler F, Upton A. Medical effects of radiation. (cdc.gov)
normal language for these physicians in Nowadays, medical imaging procedures their everyday clinical practice. (who.int)

Decrease of needless studies and as studies are believed to not sway clinical decisions much, consistency and use of low-dose and lower-dose protocols for each CT scanner ought to be followed. (healthjockey.com)
Decreasing dose variability through proper management of CT parameters in pediatric populations using benchmarks generated by data from registries can potentially decrease population exposure to ionizing radiation. (ajnr.org)

We've long known that children and teens who receive high doses of radiation to treat lymphoma or other cancers are more likely to develop additional cancers later in life. (harvard.edu)
But why doesn't that radiation then damage more healthy tissue and cause the person to have more new cancers? (thenakedscientists.com)
Lung cancer incidence per 100,000 person-years was 645 (1,060 cancers) in the low-dose helical CT group and 572 (941 cancers) in the chest X-ray group. (cdc.gov)
In the low-dose CT group, 649 cancers were diagnosed after a positive screening test, 44 after a negative screening test, and 367 among participants who either missed the screening or received the diagnosis after their trial screening phase was over. (cdc.gov)

3. Evaluation of an iterative model-based reconstruction of pediatric abdominal CT with regard to image quality and radiation dose. (lu.se)
4. Evaluation of image quality and radiation dose of abdominal dual-energy CT. (lu.se)

Scores were 2.5 for ASIR versus 3.2 for MBIR for bowel wall, 2.9 versus 3.4 for mesenteric vessels, 2.2 versus 3 for liver, and 2.5 versus 3.1 for overall image adequacy, at a mean effective dose of 1.3 ± 0.5 mSv. (auntminnie.com)

Although functional imaging provides additional image information, the high levels of radiation involved mean that it has yet to become routine in many applications. (siemens-healthineers.com)
We take patient safety very seriously, and use the lowest dose of radiation possible to achieve high quality images. (radnet.com)
We strive to perform only tests that are necessary and to use just enough radiation doses to provide a high quality image to help your doctor make an accurate diagnosis. (radnet.com)
Radiologist's satisfaction with CT image quality was unchanged and high during all periods. (mssm.edu)
Fig 3] Individual voxel phantoms have been developed using high-resolution chest CT image data. (myesr.org)
In this trial 53,454 participants at high risk for lung cancer-current and former heavy smokers of at least 30 pack-years between 55 and 74 years of age-were randomly assigned to receive low-dose helical CT or chest x-ray screenings once a year for three years, and then followed for 3.5 additional years with no further screening. (cdc.gov)
Specifical y, were physicians who were recruited hand delivered to the physicians in each high radiation doses tend to kill cells, from the 2 largest referral hospitals in setting, accompanied by an informa- while low doses tend to damage or alter Palestine: Al-Makassed hospital (250 tion sheet explaining the purpose of the the DNA of irradiated cel s [1,2]. (who.int)

Interventions: Imaging facilities received audit feedback alone comparing radiation-dose metrics with those of other facilities followed by the multicomponent intervention, including audit feedback with targeted suggestions, a 7-week quality improvement collaborative, and best-practice sharing. (mssm.edu)

Referrers should assess the use of CT on a case-by-case basis. (arpansa.gov.au)
This tool can help people assess their own risk in a radiation emergency. (cdc.gov)

Photon-counting CT (PCCT) effectively visualizes pulmonary embolism and reduces radiation dose by 48% compared with traditional CT. (auntminnie.com)
3D reconstruction of cardiac CT images could aid in follow-up strategies for pulmonary nodule screening. (auntminnie.com)
Common indications for imaging pregnant women include the need to rule out pulmonary embolism and assessment of suspected appendicitis. (diagnosticimaging.com)

These units, the ones most commonly used in comparing imaging procedures, take into account the biological effect of radiation, which varies with the type of radiation and the vulnerability of the affected body tissue. (harvard.edu)
The amount of radiation varies from test to test and depends on a number of other factors, including your weight, the number of "views" taken, the equipment, and the imaging facility's procedures. (radnet.com)

Only one-third of physicians had received a radiation protection course during their undergraduate study or in the workplace. (who.int)
Acute radiation syndrome: A fact sheet for physicians [online]. (cdc.gov)

We use special breast shields for children and pre-menopausal women when doing a chest X-ray, to prevent radiation to the breast area. (radnet.com)

Diagnosing early-stage lung cancer with low-dose CT translates to a 20-year survival rate of 81%, according to a large-scale study. (auntminnie.com)
The National Lung Screening Trial (NLST) 2 was a national randomized controlled trial launched by the National Cancer Institute (NCI) in 2002 to determine whether annual screening with low-dose helical CT would lead to earlier detection and reduced mortality from lung cancer relative to screening with CXR. (cdc.gov)
During the screening phase of the trial, 39.1% of the participants in the low-dose helical CT group and 16% of the participants in the chest X-ray group had at least one positive screening result, i.e., a finding suggestive of lung cancer. (cdc.gov)
Upon follow-up, 96.4% of the "positive" low-dose CT tests and 94.5% of the "positive" X-ray tests turned out to be false positives, meaning that the positive finding did not prove to be lung cancer. (cdc.gov)
Lung cancer was confirmed in 3.6% of the positive screenings in the low-dose CT group and in 5.5% of the positive screenings in the X-ray group. (cdc.gov)
All-cause mortality (deaths due to any cause, including lung cancer) was reduced by 6.7% for those participants who underwent low-dose helical CTs compared to those who received chest X-rays. (cdc.gov)
CHEST updated its comprehensive set of lung cancer guidelines in 2013. (medscape.com)

Ionizing radiation can damage DNA, and although your cells repair most of the damage, they sometimes do the job imperfectly, leaving small areas of "misrepair. (harvard.edu)
Ionizing radiation exposure of the population of the United States. (cdc.gov)

Staging should include local imaging studies, specifically plain radiographs and MRI of the whole affected extremity. (medscape.com)

See "Imaging procedures and their approximate effective radiation doses. (harvard.edu)
Another measurement unit, the rem, takes into consideration the fact that some forms of radiation are more effective than others. (diagnosticimaging.com)
Organ dosimetry was used to calculate cohort effective dose. (qxmd.com)
Women of child-bearing potential (WOCBP) must agree to use a highly effective method of contraception (hormonal, intrauterine device (IUD), surgical sterilization) for the duration of the study treatment and up to 5 months after the last dose of the atezolizumab (restriction period). (who.int)
Men must agree to use an effective method of contraception (barrier, surgical sterilization) at study entry and up to 5 months after the last dose of the atezolizumab. (who.int)

WP2: An imaging and radiation dose repository and integrated structured reporting templates to collect clinical information, radiological findings and radiation dose have been developed. (myesr.org)

If you mention the measurement of radiation, many people will recall the classic Geiger counter with its crescendo of clicks. (harvard.edu)
Radiation dose is a measurement of the energy absorbed by tissue from a beam of radiation. (diagnosticimaging.com)
Evaluation of CT pelvimetry in terms of foetal radiation dose and measurement accuracy 7 . (lu.se)

Most of the published analysis techniques have been developed and validated using these acquisition paradigms, unless breath-hold time and radiation exposure were not a concern, such as in the study of phantoms or animals. (ersjournals.com)

Evaluation of clinical applications for dual energy CT 4 , such as virtual non-contrast-enhanced images 5 , virtual monochromatic images, and material composition of various tissues 6 (Figure 4). (lu.se)

Typical dose from a chest x-ray. (cdc.gov)
Typical dose from a dental x-ray (bitewing and full mouth survey). (cdc.gov)

Imaging tests can detect subclinical coronary atherosclerosis and aid initiation of targeted preventative efforts based on patient risk. (bvsalud.org)

So for example, most of the time when we're trying to cure cancer, we give radiotherapy in lots of little repeated doses over a number of weeks, with the hope that the normal cells are better at repairing damage to their DNA and so can recover overnight, if you like, whereas the cancer cells tend to die more easily. (thenakedscientists.com)

CT scanning and nuclear imaging have revolutionized diagnosis and treatment, almost eliminating the need for once-common exploratory surgeries and many other invasive and potentially risky procedures. (harvard.edu)

Evaluation of amount of intravenous contrast medium in relation to radiation dose 8, 9 . (lu.se)

Anatomy7

Diseases28

Chemicals and Drugs19

Analytical, Diagnostic and Therapeutic Techniques and Equipment92

Phenomena and Processes18

Disciplines and Occupations6

Anthropology, Education, Sociology and Social Phenomena1

Technology, Industry, Agriculture7

Humanities1

Information Science19

Health Care34

Geographicals2

Computed tomography12

Examinations10

Scans31

Radiography6

Organ doses3

Diagnostic8

Approximated radiation exposure1

Patients21

Mammography2

Exposure to ionising1

Scan10

Abdomen2

Radiology8

Background radiation4

Iterative reconstruction4

Radiologists2

Minimize Radiation1

Quantify1

Ultrasound3

Procedure4

Less than 501

Adults3

Structures4

Significantly1

Modalities2

Mammograms2

Risks7

Coronary CT angiography1

Cross-sectional2

Reduce radiation1

Magnetic3

Median5

Cosmic radiation2

Reduction4

Medical10

Decrease2

Cancers4

Abdominal2

Mean effective dose1

High7

Practice1

Assess2

Pulmonary3

Varies2

Physicians2

Breast1

Lung7

Ionizing2

Radiographs1

Effective5

Findings1

Measurement3

Concern1

Tissues1

Typical2

Initiation1

Tend1

Diagnosis and treatment1

Contrast1