Stereotactic radiotherapyComputed tomographyIntensity-modulated radiotherapyConformal radiotherapyChemotherapyAdjuvantIMRTImage-guidedOncologyExternal beam radioth2020PatientsRadiosurgerySBRTAdaptiveTumorImmobilizationTreatmentsSGRTDosageNasopharyngeal carcinomaReproducibilityBeamDoseTreatmentPhysicsBreast cancerTissuesInterfractionalSimulationClinicsFractionsRotational correctionsSimulate2016SystematicSensitivityBreath-holdPhotonHospitalTranslational
Stereotactic radiotherapy11
- Dosimetric consequences of rotational setup errors with direct simulation in a treatment planning system for fractionated stereotactic radiotherapy. (musc.edu)
- For brain stereotactic radiotherapy(SRT) of multiple metastatic lesions, it is difficult to determine the optimal treatment isocenters because orientation and volumes of PTVs and proximity to critical structures are unique. (aapm.org)
- Hypofractionated stereotactic radiotherapy (HFSRT) is one salvage treatment option in previously irradiated patients with recurrent malignant glioma. (biomedcentral.com)
- Between 1997 and 2003, 19 patients were treated with hypofractionated stereotactic radiotherapy (HFSRT) for recurrent malignant glioma at the University of Würzburg, Germany. (biomedcentral.com)
- Table 1 Clinical characteristics of n = 19 consecutive patients treated with hypofractionated stereotactic radiotherapy (HFSRT) for recurrent malignant glioma. (biomedcentral.com)
- Table 2 Treatment details of hypofractionated stereotactic radiotherapy (HFSRT) in n = 19 consecutive patients with recurrent malignant glioma. (biomedcentral.com)
- 1995). A Method of Head Immobilization for Frameless Fractionated Stereotactic Radiotherapy . (queensu.ca)
- In addition, stereotactic radiotherapy is increasingly used for secondary management of recurrent or residual disease (ie, in patients in whom gross tumor resection is accomplished but microscopic tumor residual is specifically left on vital structures such as cranial nerves in order to minimize risk of functional deficit). (medscape.com)
- Stereotactic radiotherapy is the term used to define the method of delivery of a precise dose of high-energy radiation through stereotactically directed narrow beams. (medscape.com)
- Today, through the use of sophisticated imaging devices and 3-dimensional treatmentplanning computers, stereotactic radiotherapy allows much more specific targeting of a lesion, with significantly less radiation delivered to surrounding healthy tissues. (medscape.com)
- Stereotactic radiotherapy allows dynamic beam shaping and intensity modulation, providing flexibility and optimal tumor dosing. (medscape.com)
Computed tomography4
- To determine the variability of patient positioning errors associated with intensity-modulated radiotherapy (IMRT) for prostate cancer and to assess the impact of thermoplastic pelvic immobilization on these errors using kilovoltage (kV) cone-beam computed tomography (CBCT). (springer.com)
- Objective: To compare the 6-dimensional errors of different immobilization devices and body regions based on 3-dimensional cone beam computed tomography for image-guided radiotherapy and to further quantitatively evaluate the impact of rotational corrections on translational shifts and dose distribution based on anthropomorphic phantoms. (bvsalud.org)
- PURPOSE: To investigate the dosimetric effects of translational and rotational patient positioning errors on the treatment of spinal and paraspinal metastases using computed tomography image-guided stereotactic body radiotherapy. (duke.edu)
- To simulate the dosimetric effects of residual setup uncertainties, 36 additional plans (total, 756 plans) were generated for each isocenter (total, 21 isocenters) on the planning computed tomography images, which included isocenter lateral, anteroposterior, superoinferior shifts, and patient roll, yaw, and pitch rotations. (duke.edu)
Intensity-modulated radiotherapy3
- By comparison conventional IMRT (intensity modulated radiotherapy) treatment sessions would have taken 8-15 minutes, according to Dr. Mison Chun, chairperson of the hospital's department of radiation oncology. (hhmglobal.com)
- RapidArc delivers a precise and efficient treatment in single or multiple arcs of the treatment machine around the patient and makes it possible to deliver advanced image-guided intensity modulated radiotherapy (IMRT) up to eight times faster than is possible with conventional IMRT. (hhmglobal.com)
- The X1 machine has been cleared for the delivery of stereotactic body radiotherapy (SBRT), stereotactic radiosurgery (SRS), and intensity-modulated radiotherapy (IMRT). (nvscc.com)
Conformal radiotherapy2
- Abstract Purpose: The dosimetric impact of volumetric modulated arc therapy (VMAT) in lung cancer compared with 3D conformal radiotherapy (3DCRT) is well known. (sagepub.com)
- Background and purpose: A multi-centre clinical trial for prostate cancer patients provided an opportunity to introduce conformal radiotherapy with dose escalation. (monash.edu)
Chemotherapy4
- Despite intensive multi-modality treatment including tumor resection, post-operative radiotherapy and frequently adjuvant chemotherapy, the prognosis of malignant glioma continues to be poor. (biomedcentral.com)
- All patients had received previous involved-field radiotherapy with 45 to 61 Gy and 94% of patients had been pretreated with chemotherapy, most often nimustine (ACNU) and teniposide, a combination protocol favored by the Neuro-Oncology Working Group of the German Cancer Society [ 9 ]. (biomedcentral.com)
- Radiotherapy given to augment some other form of treatment such as surgery or chemotherapy. (nih.gov)
- Other clinical studies from the United States, Europe, and Asia have also influenced the treatment strategies for operable rectal cancer, as various approaches using preoperative or postoperative radiotherapy, with or without chemotherapy, have been examined. (biomedcentral.com)
Adjuvant2
- To compare the dosimetry and reproducibility of set-up with monoisocentric technique (MIT) and dual isocentric technique (DIT) in adjuvant breast radiotherapy (RT). (cambridge.org)
- Adjuvant radiotherapy is commonly used in the therapy of cancer and can be administered before or after the primary treatment. (nih.gov)
IMRT2
- Jimmy Lee, Varian's regional sales manager, says, 'Ajou University Hospital is well known for its pioneering approach, routinely using techniques such as IMRT, image-guided radiotherapy, respiratory gating and radiosurgery in order to offer its patients the most modern treatments possible. (hhmglobal.com)
- The aim of this study was to find the optimal radiotherapy (RT) method using three-dimensional (3D) conformal RT (CRT), physical wedge-based CRT (WB-CRT) and dynamic intensity-modulated RT (D-IMRT) techniques for stomach cancer. (cambridge.org)
Image-guided6
- Adaptive image-guided radiotherapy (IGRT) corrects for target position and volume variations, reducing the risk of biochemical failure while yielding acceptable rates of gastrointestinal (GI)/genitourinary (GU) toxicities. (urotoday.com)
- Comparative effectiveness of image-guided radiotherapy for non-operated localized esophageal squamous cell carcinoma patients receiving concurrent. (oncotarget.com)
- Although concurrent chemoradiotherapy (CCRT) coupled with image-guided radiotherapy (IGRT) is associated with a theoretical benefit in non-operated localized esophageal squamous cell carcinoma (NOL-ESCC) patients, there is currently no clinical evidence to support this. (oncotarget.com)
- Image-guided radiotherapy (IGRT) is an advanced radiotherapy technology with great potential to improve patient outcomes via improved radiotherapy delivery [ 7 ]. (oncotarget.com)
- Scholars@Duke publication: Dosimetric effect of translational and rotational errors for patients undergoing image-guided stereotactic body radiotherapy for spinal metastases. (duke.edu)
- METHODS AND MATERIALS: The data from 20 patients treated for metastatic spinal cancer using image-guided stereotactic body radiotherapy were investigated in this study. (duke.edu)
Oncology6
- Radiotherapy and Oncology. (wustl.edu)
- The company supplies informatics software for managing comprehensive cancer clinics, radiotherapy centers and medical oncology practices. (hhmglobal.com)
- Radiotherapy and Oncology , 90 (3), 299-306. (monash.edu)
- As more and more research indicated improved patient outcomes and minimal cognitive impairment from brain SRS treatments compared to regular radiotherapy, we decided to offer our patients this type of treatment closer to home," says Dr. Calvin McAllister, radiation oncologist with Intermountain Radiation Oncology. (varian.com)
- Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology. (au.dk)
- Published findings: Evaluation of automated pre-treatment and transit in-vivo dosimetry in radiotherapy using empirically determined parameters, E. Bossuyt, et al, Physics and Imaging in Radiation Oncology 16 (2020) 113-129. (sunnuclear.com)
External beam radioth2
- In radiotherapy, radiation treatment planning (RTP) is the process in which a team consisting of radiation oncologists, radiation therapist, medical physicists and medical dosimetrists plan the appropriate external beam radiotherapy or internal brachytherapy treatment technique for a patient with cancer. (wikipedia.org)
- Abstract Introduction: Breast cancer patients referred for external beam radiotherapy and who have large and/or pendulous breasts can present positioning and immobilisation challenges. (sagepub.com)
20204
- From November 2019 until September 2020, patient setup was performed using laser alignment with patient skin marks, and since October 2020, using SGRT. (bvsalud.org)
- Uneétude descriptive, transversale portant sur les patientes traitées en radiothérapie à l'Hôpital Général de Douala pour cancer du col de l'utérus a été réalisée d'octobre 2020 à janvier 2021.Résultats. (bvsalud.org)
- A descriptive cross over study of women treated by radiotherapy at the Douala General Hospital from October 2020 to January 2021 was conducted. (bvsalud.org)
- Il s'agissait d'une étude rétrospective descriptive d'une durée de 2 ans 3 mois allant du 1er janvier 2018 au 31 Mars 2020 portant sur 80 dossiers de malades porteurs d'hémopathies malignes et prise en charge dans le centre. (bvsalud.org)
Patients19
- Patients' perception of types of errors in palliative care-results from a qualitative interview study. (ahrq.gov)
- Patients should be simulated in the treatment position using an immobilisation device to ensure random and systematic set-up errors are minimised. (cancer.org.au)
- Korea's leading university hospital has begun treatments using a new, faster form of radiotherapy that potentially enables doctors to improve outcomes while extending modern care to more patients. (hhmglobal.com)
- A total of 2303 radiotherapy fractions of 183 patients were analyzed. (bvsalud.org)
- The dose deviation with the initial plan dose of the patients' target and organs at risk (OAR) were compared, and the correlation between the dose change and the setup errors (rotational setup errors and neck residual setup error) was analyzed. (bvsalud.org)
- CONCLUSIONS: Dose deviation between the actual accumulated and initial plan is not negligible, but most indicators difference is less than 5%, NPC patients treated by HT with MVCT correction setup errors every other day did not need adaptive radiotherapy model unless got rapid tumor shrinkage or weight loss. (bvsalud.org)
- Methods: The patient's clinical database was structured for moving tumor patients and patient set-up error measurement and immobilization device effects were investigated. (korea.ac.kr)
- In this study, we aimed to compare the radiation-induced hepatic toxicity (RIHT) outcomes of radiotherapy (RT) plus antibodies against programmed cell death protein 1 (anti-PD1) versus RT alone in patients with hepatocellular carcinoma (HCC), evaluate prognostic factors of non-classic radiation-induced liver disease (ncRILD), and establish a nomogram for predicting the probability of ncRILD. (biomedcentral.com)
- A case series involving five patients with unresectable HCC treated with stereotactic body radiotherapy (SBRT) followed by anti-PD1 reported a 100% response rate to treatment and a median PFS of 14.9 months [ 12 ]. (biomedcentral.com)
- Abstract Background: The COVID-19 pandemic has required a rapid and evolving response in order to enable the continued delivery of radiotherapy, whilst effectively managing the risk of infection to patients and staff. (sagepub.com)
- We consider the following scenario: A radiotherapy clinic has a limited number of proton therapy slots available each day to treat cancer patients of a given tumor site. (nsf.gov)
- The Radiation Planning Assistant (RPA) is a system developed for the fully automated creation of radiotherapy treatment plans, including volume-modulated arc therapy (VMAT) plans for patients with head/neck cancer and 4-field box plans for patients with cervical cancer. (jove.com)
- In radiotherapy clinics, the International Atomic Energy Agency (IAEA) recommends 1 treatment planner per 300 patients, and 1 radiation physicist per 400 patients treated annually 1 . (jove.com)
- The Varian IDENTIFY™ system is incorporated within the Varian technology portfolio and helps ensure that all patients gets the treatment meant for them-from patient check-in through setup and treatment. (varian.com)
- IDENTIFY has proven an important tool in our SRS program as it provides the assurance that our daily setups are accurate and that the patients are appropriately positioned for treatment. (varian.com)
- In addition to the surface-guided setup, positioning, and motion monitoring features in IDENTIFY, the Welcome Desk feature is proving to be a valuable tool at the clinic for checking in patients and saving time previously spent verifying patient details. (varian.com)
- Their first project involved delivering radiotherapy treatment without masks for palliative patients. (varian.com)
- Rotational correction is very important for patients with multiple targets and for the setup of paraspinal patients when the isocenter is away from bony structures. (duke.edu)
- Le protocole utilisé dans le traitement du myélome multiple a été le VMCD-REV à 76,92% avec pour réponse thérapeutique complète chez 6 patients, 3 réponses partielles et 4 en cours de traitement. (bvsalud.org)
Radiosurgery1
- Varian Medical Systems, Inc., of Palo Alto, California, is the world's leading manufacturer of medical devices and software for treating cancer and other medical conditions with radiotherapy, radiosurgery, proton therapy, and brachytherapy. (hhmglobal.com)
SBRT1
- Owing to recent advances in radiotherapy techniques and radiosensitive characteristics of HCC, SBRT has shown excellent local tumor control rates as well as minimal treatment-related toxicity, especially for small (≤5 cm) HCCs that are not suitable for curative treatments [ 8 , 9 , 11 - 13 ]. (e-cmh.org)
Adaptive1
- Adaptive radiotherapy function application software MIM7.1.3 were used to accumulate the actual dose. (bvsalud.org)
Tumor3
- Combining these developments may reduce the side effects of radiation treatments by helping doctors locate a tumor, reduce setup errors, and avoid healthy tissues. (nvscc.com)
- It achieves this by using individual emissions that make up a partially formed PET image generated by the tumor as a homing signal or biological marker to quickly guide radiotherapy to that location. (nvscc.com)
- Compared with the original plans, the daily treatment data indicated that translational adjustments could correct most of the setup errors to mean divergences of -1.4% for tumor volume coverage and -0.3% for the maximal dose to the organs at risk. (duke.edu)
Immobilization2
- One notable solution, the positionPRO™ Radiotherapy Patient Immobilization and Set-up System , is the premiere modular immobilization system for cranial, head, and neck treatments. (aktina.com)
- The Portrait™ Intracranial, Head and Neck Device provides superior immobilization for a variety of brain and head & neck radiotherapy treatments. (com.sa)
Treatments4
- The treatment went extremely well and it was more comfortable for the patient because she had to lie on the couch for considerably less time,' said Dr. Chun 'Faster treatments mean there is less chance for the patient to move during dose delivery, so RapidArc reduces the possibility of both set-up error and errors due to internal organ motion. (hhmglobal.com)
- RapidArc is a very effective way of delivering advanced radiotherapy treatments to many tumors more quickly while reducing the dose to surrounding healthy tissue,' said Dr. Chun. (hhmglobal.com)
- Radiotherapy treatments are planned on computers using a combination of a machine beam model and a scanned patient geometry. (physicsworld.com)
- Portrait accommodates supine and prone setups for patient specific treatments. (com.sa)
SGRT5
- The goal of the study was to evaluate the inter- and intrafractional patient setup accuracy of target volumes located in the head, thoracic, abdominal, and pelvic regions when using SGRT, by comparing it with that of laser alignment using patient skin marks, and to calculate the corresponding setup margins. (bvsalud.org)
- The inter-fractional patient setup accuracy was significantly better using SGRT compared to laser alignment with skin marks. (bvsalud.org)
- Calculation of setup margins for the combined inter- and intra-fractional setup error revealed similar setup margins using SGRT and kV-CBCT once a week compared to laser alignment with skin marks and kV-CBCT every other day. (bvsalud.org)
- SGRT opens the possibility to reduce the number of CBCTs while maintaining sufficient setup accuracy. (bvsalud.org)
- Surface guided radiotherapy (SGRT) may aid accurate positioning (on the couch prior to irradiation). (estro.org)
Dosage3
- Radiotherapy Dosage" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (sdsu.edu)
- This graph shows the total number of publications written about "Radiotherapy Dosage" by people in this website by year, and whether "Radiotherapy Dosage" was a major or minor topic of these publications. (sdsu.edu)
- Below are the most recent publications written about "Radiotherapy Dosage" by people in Profiles. (sdsu.edu)
Nasopharyngeal carcinoma1
- BACKGROUND: To analyze the relationship between the rotational and residual setup errors and the dose deviation on nasopharyngeal carcinoma (NPC) treated by helical tomotherapy (HT). (bvsalud.org)
Reproducibility1
- Treatment reproducibility was assessed in terms of systematic and random error. (cambridge.org)
Beam6
- 3DCRT uses MLCs to shape the radiotherapy beam to closely match the shape of a target tumour, reducing the dose to healthy surrounding tissue. (wikipedia.org)
- The success of the treatment depends on the precision of the dose delivery and this can be affected by a number of factors including the accuracy of the beam model, machine issues, patient setup and physical changes to the patient. (physicsworld.com)
- Integrated software also provides a full suite of tools for isocenter management including optimized isocenter computation, live-track couch alignment, beam alignment current computation, and end-to-end beam-to-target error matrix computation. (aktina.com)
- Based on a traditional setup, a new compact fast-bunching design is first introduced to optimize the 600 keV/u RFQ with a 0.05 pmA 12 C 4+ beam. (sinap.ac.cn)
- The error sources cover input beam parameters errors, machining errors and alignment errors. (sinap.ac.cn)
- The simulation results show that the beam loss and emittance growth of the RFQ are acceptable and within typical ranges of error. (sinap.ac.cn)
Dose9
- Peeters ST, Heemsbergen WD, Koper PC et al (2006) Dose-response in radiotherapy for localized prostate cancer: results of the dutch multicenter randomized phase iii trial comparing 68 gy of radiotherapy with 78 gy. (springer.com)
- In forward planning, the planner places beams into a radiotherapy treatment planning system that can deliver sufficient radiation to a tumour while both sparing critical organs and minimising the dose to healthy tissue. (wikipedia.org)
- No correlation was found between dose deviation values and the translational setup errors of target. (bvsalud.org)
- Moreover, to minimize the dose deviation, more attention should be paid to the reduction of pitch, roll, and residual error of cervical vertebrae during body positioning. (bvsalud.org)
- 1. Radiation Overdose and Other Dose Errors During Radiation Therapy. (healthleadersmedia.com)
- First, the consequences of a radiation overdose rarely manifest right away, 'meaning that certain errors-such as those resulting from improper device setup or an inappropriate treatment plan-could lead to a patient being repeatedly exposed to an inappropriate dose before the error is noticed in clinical review. (healthleadersmedia.com)
- Administering the wrong dose, or treating the wrong site or patient are all caused by human error, software problems, and provider or operator inexperience with the fast pace of technological change. (healthleadersmedia.com)
- For example, the report says, in one year from July 2009 to July 2010, there have been over 40 reports of software errors, manufacturing-required software modifications or dose calculation errors for radiotherapy systems, linear accelerators and radiation treatment planning systems. (healthleadersmedia.com)
- The median interval from post-operative radiotherapy to HFSRT was 19 (range 3-116) months, the median daily single dose 5 (4-10) Gy, the median total dose 30 (20-30) Gy and the median planning target volume 15 (4-70) ml. (biomedcentral.com)
Treatment11
- The measured systematic errors in the immobilized group during treatment were 0.46 ± 1.75 mm along the x-axis, − 0.35 ± 3.83 mm along the y-axis, 0.20 ± 2.75 mm along the z-axis and 4.05 ± 3.02 mm in the 3D vector. (springer.com)
- Radiotherapy treatment involves the delivery of high doses of radiation, targeted at a tumour, but often in close proximity to other critical organs. (physicsworld.com)
- The most simplistic use of this data is to ensure that no gross error has occurred during treatment delivery. (physicsworld.com)
- And second, radiation treatment plans are more complex, 'leaving very narrow margin for error,' the report states. (healthleadersmedia.com)
- This could reduce the setup error of each lesion but may not be optimal for plan quality and treatment time. (aapm.org)
- It is a combination of specially developed in-house software that uses an application programming interface to communicate with a commercial radiotherapy treatment planning system. (jove.com)
- The RPA then generates a complete radiotherapy treatment plan. (jove.com)
- The system is automated within the Varian ecosystem to integrate within the standard workflow of patient identification, CT acquisition, accessory and patient setup and treatment delivery. (varian.com)
- IDENTIFY helps to minimize treatment variables and reduces the opportunity for error over the course of a patient's treatment. (varian.com)
- The results of this study provide guidance for the treatment planning process and recognition of the dosimetric consequences of daily patient treatment setup errors. (duke.edu)
- The phantom was set up on a treatment table with various initial setup errors. (elsevierpure.com)
Physics1
- Steve Colligan is head of radiotherapy physics at Raigmore Hospital in Inverness, Scotland. (physicsworld.com)
Breast cancer2
- Factors impacting on patient setup analysis and error management during breast cancer radiotherapy. (ahrq.gov)
- Risk of ischemic heart disease in women after radiotherapy for breast cancer. (visionrt.com)
Tissues1
- The total amount of radiation absorbed by tissues as a result of radiotherapy. (sdsu.edu)
Interfractional1
- Clinical evaluation of interfractional variations for whole breast radiotherapy using 3-dimensional surface imaging. (visionrt.com)
Simulation1
- The CT simulation workflow is cumbersome and error-prone. (siemens-healthineers.com)
Clinics1
- Since Varian's release of the latest version of IDENTIFY earlier this year, a number of clinics in the USA and Europe have adopted the system for patient identification and setup, accessory positioning, and motion monitoring. (varian.com)
Fractions1
- In its first two years, errors were detected in 7% of fractions analyzed. (sunnuclear.com)
Rotational corrections1
- Abstract Aim: This study attempts to investigate fiducial marker (FM) migration and calculate the prostate planning target volume (PTV) margin considering the setup errors after translation corrections alone (T) and translation plus rotational corrections (T+R) and anatomy variation with respect. (sagepub.com)
Simulate1
- In a second experiment, the cells were also treated with increasing doses of radiation to simulate cancer radiotherapy. (scienceblogs.com)
20161
- 2016). Measurement of electromagnetic tracking error in a navigated breast surgery setup . (queensu.ca)
Systematic2
- Systematic errors were generally smaller than those previously reported in the literature. (monash.edu)
- The systematic (Σ) and random (σ) errors for each sub-CTV are presented in Table 1. (estro.org)
Sensitivity1
- The data are the same across papers, and so are the conclusions: The molecule is a powerful inhibitor of cancer cell growth, and it increases the sensitivity of cancer cells to radiotherapy. (scienceblogs.com)
Breath-hold2
- Monitoring ABC-assisted deep inspiration breath hold for left-sided breast radiotherapy with an optical tracking system. (visionrt.com)
- The UK HeartSpare Study: randomised evaluation of voluntary deep-inspiratory breath-hold in women undergoing breast radiotherapy. (visionrt.com)
Photon1
- These plans may be sensitive to range and setup errors, especially misalignments between proton and photon doses. (nsf.gov)
Hospital1
- Home Industry Updates Press Releases Ajou University Hospital Becomes First in Korea to Treat Using RapidArc Radiotherapy. (hhmglobal.com)
Translational1
- RESULTS: Translational setup errors increased farther away from the head. (bvsalud.org)