TY - JOUR. T1 - Videodensitometric quantitation of stenosis. T2 - In vitro and in vivo validation. AU - Seibert, J Anthony. AU - Link, Daniel P. AU - Hines, H. H.. AU - Baltaxe, H. A.. PY - 1985. Y1 - 1985. N2 - Percentage of stenosis of a vascular lumen was quantitated using a digital subtraction angiography system with videodensitometric analysis. To validate the algorithm and methods, we used precisely drilled Lucite rods of three inner diameters and various reduced diameters to give known luminal reduction. Both in vitro and in vivo results of stenosis measurements resulted in an excellent correlation between actual and measured values (correlation coefficient , 0.9 for all trials). Consistent underestimation of stenosis of about 5% was attributed to the various image degradations inherent with the imaging procedure and equipment. Errors were greatest with mid range stenoses and less at the extremes of the lesion values. An insufficient signal-to-noise ratio was caused by low photon flux ...
AIM: To assess foveal cone photoreceptor function in patients with unexplained loss of central visual acuity. METHODS: Testing of foveal cone photoreceptor function was performed using scanning laser densitometry, colour matching (Rayleigh equation), and pattern electroretinography (ERG). Standard tests included full field ERG, electrooculography, visual evoked potentials, static perimetry, and fluorescein angiography. RESULTS: Decreased foveal cone photopigment density and abnormal pattern ERG were found in three patients. Results of colour matching were not unequivocal. CONCLUSION: Testing of foveal cone photoreceptor function using scanning laser densitometry may determine the location of pathological changes in certain patients with unexplained visual loss. ...
A method which utilizes computerized microdensitometry to measure amino acid compositions of polypeptides resolved in two-dimensional gels is described. Twenty cultures of two human cell lines were radiolabeled with each of the 20 different 14C or 35S - amino acids. Two-dimensional polyacrylamide gel electrophoresis was performed on total protein samples of the cultures in replicates of three. For each amino acid label the relative amount of radioactivity in an "unknown" polypetide species was computed using the measured radioactivity simultaneously incorporated into the reference protein, β-, γ-actin, whose precise amino acid composition is known. We tested the accuracy of this method by computing the amino acid composition of two species of mutant β-actin, which along with normal β-, γ-actin as the reference provided us with an ideal set of conditions. We found that amino acid composition can be predicted with a standard error of 6% over all twenty amino acids. Techniques are described to ...
Abstract Absolute or relative increases in intramyocardial fibrosis accompany hypertrophy development in human hypertension. Myocardial texture analysis of two-dimensional echocardiographic gray-level distribution has been shown to identify alterations attributed to abnormal collagen content in several conditions. Therefore, this echocardiographic tool might help to identify those hypertensive individuals with abnormal interstitial collagen deposition, a condition that may promote and/or aggravate morbidity in this group of people who are at high risk for cardiovascular events. We compared male essential hypertensive subjects who had marked cardiac hypertrophy (left ventricular mass index adjusted for height ,2 SD of mean of control group) (group 1) with normotensive elite veteran athletes who had comparable cardiac hypertrophy (group 2) and sedentary normotensive subjects as controls (group 3). The groups (n=14 each) were matched for age (±2 years) and sex. We analyzed echocardiographic ...
Bone densitometry is used to measure the bone mineral content and density. This measurement can indicate decreased bone mass, a condition in which bones are more brittle and more prone to break or fracture easily. Bone densitometry is used primarily to diagnose osteoporosis and to determine fracture risk. The testing procedure measures the bone density of the bones of the spine, pelvis, lower arm, and thigh.. Bone densitometry testing may be done using X-rays, dual-energy X-ray absorptiometry, (DEXA or DXA), or by quantitative CT scanning using special software to determine bone density of the hip or spine. These procedures are generally done in a clinic, hospital, or free-standing radiology facility.. However, for mass screening purposes, there are portable types of bone densitometry testing. The portable testing is done using either a DEXA (or DXA) X-ray device or a quantitative ultrasound unit. Both types of portable testing may use the radius (one of the two bones of the lower arm), wrist, ...
Bone densitometry is used to measure the bone mineral content and density. This measurement can indicate decreased bone mass, a condition in which bones are more brittle and more prone to break or fracture easily. Bone densitometry is used primarily to diagnose osteoporosis and to determine fracture risk. The testing procedure measures the bone density of the bones of the spine, pelvis, lower arm, and thigh.. Bone densitometry testing may be done using X-rays, dual-energy X-ray absorptiometry, (DEXA or DXA), or by quantitative CT scanning using special software to determine bone density of the hip or spine. These procedures are generally done in a clinic, hospital, or free-standing radiology facility.. However, for mass screening purposes, there are portable types of bone densitometry testing. The portable testing is done using either a DEXA (or DXA) X-ray device or a quantitative ultrasound unit. Both types of portable testing may use the radius (one of the two bones of the lower arm), wrist, ...
Corneal densitometry, which also is known as corneal backscatter, relates to corneal transparency and is influenced by changes in corneal histology.13 It was first measured using a slit-lamp photometer with a pin-light attachment.14 Scheimpflug cameras allow for objective evaluation of the densitometry.15 It is noteworthy that for normal eyes, the corneal densitometry decreases from the anterior to posterior layers of the cornea. However, it does not show any relationship with the corneal keratometry.16 We observed that the distribution of the corneal densitometry values was similar to that of normal eyes. However, unlike normal eyes, the densitometry values of the anterior 0 to 2 and 2 to 6 mm layers significantly correlated with the Kmax values.16 In addition, we also noticed that the densitometry values of the anterior 0 to 2 mm, anterior 2 to 6 mm, and total 0 to 2 mm layers correlated with the thinnest corneal thickness, anterior corneal elevation, and posterior corneal elevation. This ...
Densitometry data generated for Western blots are commonly used to compare protein abundance between samples. In the last decade, it has become apparent that assumptions underpinning these comparisons are often violated in studies reporting Western blot data in the literature. These violations can lead to erroneous interpretations of data and may contribute to poor reproducibility of research. We assessed the reliability of Western blot data obtained to study human myometrial tissue proteins. We ran dilution series of protein lysates to explore the linearity of densitometry data. Proteins analysed included |i|α|/i|SMA, HSP27, ERK1/2, and GAPDH. While ideal densitometry data are directly proportional to protein abundance, our data confirm that densitometry data often deviate from this ideal, in which case they can fit nonproportional linear or hyperbolic mathematical models and can reach saturation. Nonlinear densitometry data were observed when Western blots were detected using infrared
In recent years it has become clear that the use of clinical end points such as myocardial infarcts as a measure of the effect of serum lipid lowering carry considerable drawbacks, although it is the...
Bone density scanning, also called dual-energy x-ray absorptiometry (DXA) or bone densitometry, is an enhanced form of x-ray technology that is used to measure bone
Osteoporosis is a debilitating disease affecting thousands of women in this country. State-of-the-art bone densitometry studies measure bone mineral density of the lumbar spine, hips and forearms.
Bone Densitometry is a fast, safe and painless test that uses advanced technology called DXA to measure symptoms of osteoporosis.
dem bones|Bone densitometry is the measurement of the density of the bone. Currently, this is performed at either the screening level or the diagnostic ...
Axial Bone Densitometry Measurement Market Insights: Global Industry Analysis, Market Drivers, Restraints, Opportunities, Applications, Trends And Forecasts 2020-2026
Learn in-depth information on Bone Densitometry, its risks, benefits, complications, cost, recent advances, and post op care at home.
GSRd (.one, 1, and ten mM) markedly reduced SI/Rinduced mobile dying, respectively growing viability price to 59%sixty one.eight%, sixty three%sixty
A vibration densitometer including a closed loop electromechanical oscillator for vibrating a fluid immersible vane. A digital output directly proportional to density is achieved through a unique digital squarer. The densitometer is an all digital system. In the loop, a tracking filter is provided. Separate search and track automatic gain control feedbacks are provided. A threshold detector controls clamps and a gate to cause the voltage controlled oscillator of a first phase lock loop to search or track the vane resonant frequency. The threshold detector also effects the search feedback. A phase adjustment circuit and a second phase lock loop are employed to impress a sine wave voltage component on the vane driver of a phase which creates maximum efficiency.
Sm-12 Speedmaster Pocket Pal Densitometer - Get the lowest price on Sm-12 Speedmaster Pocket Pal Densitometer, online at AllegroMedical.com.
Yeah hanhan, I am with bob1, its practically not possible to get 100% comparability between different gels. Do the best you can with actin or maybe even a second control, but WB will always stay a semi-quantitative method. I have done this too and done densitometric measurements. You can see in these data also great variation. Best is, you keep most parameters in your gels and blots as stable as possible and get a certain routine in handling things. Prepare and run as much samples as possible at one time, otherwise time-dependant variation will add also upon your other variations. And then hope the best ...
in Journal of Chromatography. A (1975), 110. After determination of charring conditions and the measurement by densitometry of lipids separated by thin-layer chromatography, a statistical analysis was performed to determine the significance of the ... [more ▼]. After determination of charring conditions and the measurement by densitometry of lipids separated by thin-layer chromatography, a statistical analysis was performed to determine the significance of the results. Calibration curves were studied and response factors calculated for some saturated and unsaturated triglycerides. [less ▲]. Detailed reference viewed: 45 (10 ULiège) ...
In article ,35e40dba.2700387 at news.univie.ac.at,, Martin Offterdinger ,a8803349.nospam at unet.univie.ac.at, wrote: , ,I would like to know if you would consider it as science to quantitate ,bands obtained by enzymatic Western Blotting with a densitometer. I I have seen this done, but only as semi-quantitative, not quantitative. As with any other method, you need to take great care that your antibody isnt limiting and so forth. One way of making the data a little more convincing is to do serial dilutions of your lysate, say 3-fold. Your densitometry should accurately detect the known dilution of each sample, and the ratios between the different samples should remain constant at the different dilutions. If either is not true, your blots are not useful for quantitation. My own limited experience in trying to get accurate quantitation from westerns is that its not very reliable, but that if you emphasize the semi part of the semi-quantitative you can get some information from it. It ...
Read user reviews, compare products and contact manufacturers of Data Analysis products, including Chemometrics, Densitometry and DNA Sequencers, on SelectScience.
Read user reviews, compare products and contact manufacturers of Data Analysis products, including Chemometrics, Densitometry and DNA Sequencers, on SelectScience.
Market Research Future adds new report of "Bone Densitometers Market Research Report- Global Forecast to 2022" it contains Company information, geographical data and Table of Content. Market Highlight:. Bone densitometry is a sort of non-meddlesome development which is used to evaluate bone mass. This development measures the measure of loss of bone mass in a patients body. Bone mass is the greatness of the skeleton, general or specifically regions. Nowadays, bone densitometry is used as a set up standard to gage the bone material thickness. The market for bone densitometer is creating at a generally conventional rate. Creating senior masses which are exposed to bone related sicknesses has fueled the advancement of bone densitometer market.. The global market for bone densitometers is required to stretch around USD 1.2 billion before the finish of the conjecture time frame and is relied upon to develop at a CAGR of ~5.3%.. Get a Sample Report @ ...
Osteoporosis. Osteoporosis is a disease characterized by low bone mass and deterioration of bone tissue. This leads to increased bone fragility and risk of fracture, particularly of the hip, spine and wrist. Many patients are diagnosed with osteoporosis once they have suffered broken bones or a fracture. More than 1.4 million Canadians suffer from osteoporosis - one woman in every four women over the age of 50 suffers from osteoporosis while every one man in eight over the age of 50 has the disease.. Diagnosing Osteoporosis. Osteoporosis is diagnosed through Bone Mineral Density (BMD) tests using Densitometry (DXA). DXA can help detect osteoporosis and give indications as to whether a patient may develop it in the future.. Prior to bone densitometry, osteoporosis was detected through routine X-rays or a bone biopsy. However, with these methods, osteoporosis was rarely diagnosed before a fracture had occurred and a minimum of 25% of the bones mass had already been lost. By that time, the disease ...
AARNA SYSTEMS - Manufacturer, Supplier,Wholesaler,Trader,Distributor of Ultrasound Bone Densitometer,Bone Densitometry Equipment having features like Bluetooth Connectivity, Color LCD Display, etc.
Importance: Disruption of extracellular matrix integrity is critically involved in both intracranial aneurysm and bone fragility. Furthermore, both intracranial aneurysm and osteoporosis have a female predominance, and sex hormones are considered to affect this discrepancy. Objective: To evaluate the association between bone mineral density and intracranial aneurysm. Design, Setting, and Participants: A cross-sectional study conducted with 14 328 patients who underwent brain magnetic resonance angiography and bone mineral densitometry as a part of a health examination at a specialized center for comprehensive health examination in Seoul, the largest metropolitan area in the Republic of Korea, between December 2004 and November 2015 ...
D for densitometry analysis of immunoblots, and all measurements were normalized against GAPDH loading controls.Materials and Methods Cells cultureA549 cells,
The mean corneal densitometry over the total area was 16.46 ± 1.85 GSU. For total densitometry the Pearsons correlation coefficient was r = 0.542 (p < 0.001). Statistically differences men and women were found for the total area. When the cornea was divided in different depth layers, a significant correlation was found for all layers. However, when the cornea was divided in concentric annulus only was found a strong correlation of densitometry with age in 6-10 mm annulus (p < 0.001). No correlations were found between mean keratometry or spherical equivalent with corneal densitometry in any zone of the cornea ...
The companion study included two groups of women from MA.27: 300 patients with bone mineral density T-scores ≥ −2.0 (up to two standard deviations below sex-matched, young adult mean) and 197 with at least one T-score (hip or spine) , −2.0. Both groups received vitamin D and calcium and patients with T-scores , −2.0 received bisphosphonates. The primary endpoints were percent change in bone mineral density at 2 years in lumbar spine and total hip for both groups. ...
If you have a question about this talk, please contact Vanessa Blake.. Liquid mixing and blending is an important operation before packaging a many fluid product. The blending or mixing process should be cheap and efficient and at the same time result in high product quality in terms of consistency. In order to achieve this goal experimentally one needs to perform many trials involving changes in the motion and geometric dimensions of the packaging container as well as product ratios of the fluid that is being blended together. Simulation can be used as an efficient tool to reduce the number of such experimental trials and/or optimise the system once a reasonable solution is obtained from the experimental trials.. There are three principle issues that arise while modelling such systems which can lead to difficulties for traditional grid-based CFD methods:. ...
Bone densitometry is a kind of non-intrusive advancement which is utilized to assess bone mass. This advancement measures the measure of loss of bone mass
Global mobile imaging services market was valued at USD 10.7 billion in 2013 and is expected to grow at a CAGR of 3.2% from 2014 to 2020, to reach an estimated value of USD 13.3 billion by 2020
The Regina QuAppelle Health Region has continued to pursue the most advanced diagnostic equipment, including Magnetic Resonance Imaging (MRI), Computed Tomography (CT) and Bone Densitometry, which greatly improves early detection of disease or injury. Professionally trained technologists are responsible for operating these advanced diagnostic machines and specialized doctors evaluate the test results.. The Imaging Department works in conjunction with a patients doctor to determine the most appropriate test for each individual. Patients are referred for x-rays, ultrasound, mammography or for more detailed testing using computed tomography (CT), magnetic resonance imaging (MRI) and interventional services (angiograms).. ...
X-ray machine facility forms, limited scope, bone densitometry and computer tomography operator registration, mammography provisional certificate, qualified inspectors and experts registration, service company registration ...
Interestingly, in a third category of models, ERK reactivation was minimal but viability was still unaffected suggesting that ERK activity is uncoupled from viability control in these cells.. Overall, we observe a range of effects of KRAS G12C inhibition on downstream signaling dynamics and the change in major downstream signals observed are not sufficient to explain the viability outcome. While KRAS has been shown to activate PI3K at least is some contexts, ARS1620-driven loss of KRAS-GTP resulted in suppression of p-AKT only in 3 of 12 cell lines studied (LU65, NCI-H358, and NCI-H23). Thus, we show that the PI3K pathway is not under the sole control of mutant KRAS in KRAS G12C NSCLC models, and perhaps tumors, as shown previously in colorectal models (22).. Overall, these results suggest that KRAS does not uniformly control prosurvival signals across KRAS G12C cell lines. To more finely resolve the dynamic signaling response throughout the pathway, we used densitometry quantification across ...
Isoflavonia relief increases connective tissue density and smooths the skin. Visible improvement of the skin structure can be seen with use of the product as it increases the skins tension and elasticity.
Recent studies indicate that measurement of Hemoglobin (Hb) Alc may provide a reliable index of long-term control of diabetes. Studies indicate that measurement of HbAlc provides a timed average of patient plasma glucose concentrations over the previous two to four weeks. Polyacrylamide slab gel (pH 6-8) isoelectric focusing (PAGIF) with microdensitometry provides a rapid, simple method for assaying 60 patient samples/day. Sampling by fingers tick into heparinized microhematocrit tubes is sufficient for quantitation. HbAlc is completely resolved from HbAII, Ala, Alb, F and S. Mean HbAlc (expressed as a percentage of total Hb) was 9.38 + 0.38 (SEM) in 39 diabetics (D) and 4.73 + 0.23 in 21 controls (C), (p 0.01). IEF shows excellent correlation with results obtained by standard column chromatography 100 (r =.929, n = 35, 24D + IlC). Analysis of intra- and inter-assay variance revealed good reproducibility and accuracy comparable to column methodology. Intact erythrocytes were studied in vitro to ...
Abstract: To investigate phage activity in the rumen, a method for quantifying phage has been developed. By differential centrifugation and ultrafiltration, phage particles were separated and concentrated from ruminal fluid. Linear double-stranded DNA from this fraction containing predominantly tailed phage was isolated and separated by size, using pulsed-field gel electrophoresis (PFGE). Laser densitometry of gel photographs allowed the numbers of phages with DNA in each size region to be calculated and, therefore, the total numbers per milliliter of ruminal fluid to be estimated ...
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[101 Pages Report] Check for Discount on United States Peripheral Bone Densitometer Market Report 2017 report by QYResearch Group. In this report, the United States Peripheral Bone Densitometer market...
Fractures of the legs and pelvis due to falls are a significant public health problem, especially in elderly women. Fractures may lead to high medical expenses, inability to live independently, and even risk of death.. Bone mineral density (BMD) is the amount of mineral matter per square centimeter of bones used as an indirect indicator of osteoporosis and risk of fracture. Quantitative Computed Tomography (QCT) Densitometry is a method to measure bone mass.. A bone desity scan is a painless, non-invasive low-dose x-ray which checks an area of the body (such as the hip, hand, or foot) for signs of mineral loss and bone thinning. Those measurements are compared to a database of normal individuals of your same age, sex, and race to determine whether you have lost bone density.. ...
Pharm Methods Pharmaceutical Methods 2229-4708 2229-4716 Phcog.Net India Pharm Methods-9-8 10.5530/phm.2018.1.2 Original Article Application of Box-Behnken Design for Validation of High-Per Formance Thin-Layer Chromatography/Densitometry Method for Robustness Determination of Apremilast in Bulk and in-house Tablets Chaudhari Suraj Rajendra 1 Shirkhedkar Atul Arun 2 *
Lumbar spine bone mass as measured by DXA may be elevated by co-existing conditions in or near the spine. Such confounding factors may include osteoarthritis, compression fracture and aortic calcification. In an effort to minimize spurious reporting of spine bone mass resulting from these conditions, the International Society for Clinical Densitometry (ISCD) recommends applying specific criteria to determine whether one or more vertebral bodies is excluded when reporting the final lumbar spine T-score (1). The ISCD recommends excluding vertebrae if DXA or radiographic images indicate a focal structural anomaly affecting some but not all of the visualized vertebrae (1). Vertebrae should also be excluded if an unusual discrepancy in T-scores is noted between adjacent vertebrae (1). Individual T-scores should be within one standard deviation of adjacent vertebrae (1).. In principle, the exclusion criteria improve diagnostic sensitivity of lumbar spine DXA for the detection of osteoporosis. However, ...
We have developed microdensitometer-computer correlation techniques to analyze the arrangement of microtubule arms and bridges (i.e., microtubule-associated proteins [MAPs]). A microdensitometer was used to scan immediately adjacent to the wall of longitudinally sectioned microtubules in positive transparency electron micrographs. Signal enhancement procedures were applied to the digitized densitometer output to produce a binary sequence representing the apparent axial spacing of MAP projections. These enhanced records were analyzed in two ways. (a) Autocorrelograms were formed for each record and correlogram peaks from a group of scans were pooled to construct a peak frequency histogram. (b) Cross-correlation was used to optimize the match between each enhanced record and templates predicted by different models of MAP organization. Seven symmetrical superlattices were considered as well as single axial repeats. The analyses were repeated with randomly generated records to establish confidence ...
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Color analysers, colorimeters and densitometers for transmission and reflection. Use your own computer plus one tiny interface, our free software, one (or more) probe(s) and accessories.
Aarna Systems And Wellness Pvt. Ltd. - Importer, Manufacturer, Distributor, Supplier, Trading Company of Ultrasound Bone Densitometer CM-200 based in Udaipur, India
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Intra-cellular and inter-cellular protein translocation can be observed by microscopic imaging of tissue sections prepared immunohistochemically. A manual densitometric analysis is time-consuming, subjective and error-prone. An automated quantification is faster, more reproducible, and should yield results comparable to manual evaluation. The automated method presented here was developed on rat liver tissue sections to study the translocation of bile salt transport proteins in hepatocytes. For validation, the cholestatic liver state was compared to the normal biological state. An automated quantification method was developed to analyze the translocation of membrane proteins and evaluated in comparison to an established manual method. Firstly, regions of interest (membrane fragments) are identified in confocal microscopy images. Further, densitometric intensity profiles are extracted orthogonally to membrane fragments, following the direction from the plasma membrane to cytoplasm. Finally, several