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Beam Tomography (beam + tomography)

Distribution by Scientific Domains
Medical Sciences100%

Kinds of Beam Tomography

  • electron beam tomography
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    Selected Abstracts

    Pilot RCT of Aged Garlic Extract finds slowing of atherosclerotic progression as measured by electron beam tomography

    FOCUS ON ALTERNATIVE AND COMPLEMENTARY THERAPIES AN EVIDENCE-BASED APPROACH, Issue 2 2005
    Article first published online: 14 JUN 2010
    [source]

    Identifying the course of an anomalous left coronary artery using contrast-enhanced electron beam tomography and three-dimensional reconstruction

    CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS, Issue 4 2002
    Alexander Sevrukov MD
    Abstract Coronary anomalies are a rare but recognized cause of myocardial ischemia and sudden death. Until recently, invasive coronary arteriography was the diagnostic method of choice. However, contrast-enhanced electron beam tomography has the advantage of three-dimensional visualization of anomalous coronary arteries. We describe a case of anomalous origin of the left coronary artery. Cathet Cardiovasc Intervent 2002;57:532,536. © 2002 Wiley-Liss, Inc. [source]

    Does imaging help with preventing extrusion?

    ACTA OPHTHALMOLOGICA, Issue 2009
    A GOMAA
    Both clinical and radiological methods can be used for early detection of resorption in OOKP patients; this is influential in preventing serious complications such as extrusion and endophthalmitis. Radiologically, use of either multidetector computed tomography (MDCT) or electron beam tomography (EBT) is valuable in identifying laminar resorption. A novel approach was recently adopted in Sussex Eye Hospital, using volume rendering software in processing previously obtained MDCT images, to calculate volume of the OOKP lamina rather than 2D measurements. We present the results of an observational retrospective case series study to illustrate the use of this approach. We describe how it can be used to calculate percentage change in volume of the lamina over time and how this can be correlated with clinical laminar resorption. We will also discuss further recommendations to build upon this advance. [source]

    Cardiac computed tomography: Diagnostic utility and integration in clinical practice

    CLINICAL CARDIOLOGY, Issue S1 2006
    Matthew J. Budoff M.D.
    Abstract Cardiac applications of computed tomography (CT) is a rapidly growing diagnostic area because of the ability to visualize plaque burden (coronary artery calcification [CAC]) and luminal obstruction (computed tomographic angiography [CTA]) noninvasively. Coronary artery calcification has been validated in over 1,000 studies over the last 20 years, primarily with electron beam tomography. Studies demonstrate several indications that could aid physicians in the management of symptomatic and asymptomatic patients. Determining that a symptomatic patient has no CAC is associated with both a lower risk of an abnormal nuclear study and angiographic obstruction. The ability to detect subclinical atherosclerosis (CAC) with minimal radiation and no contrast makes this an attractive method for risk stratification. New studies demonstrate a 10-fold risk of cardiovascular events with increasing amounts of coronary calcification. The invasive nature, expense, and risk resulting from invasive angiography have been instrumental in encouraging the development of new diagnostic methods that allow the coronary arteries to be visualized noninvasively. Multislice CT, with its advanced spatial and temporal resolution, has opened up new possibilities in the imaging of the heart and major vessels of the chest, including the coronary arteries. The last decade has seen great strides in the field of cardiac imaging, particularly in the ability to visualize the coronary lumen with sufficient diagnostic accuracy. Possessing that qualification, CTA is now being used increasingly in clinical practice. As a result of having high spatial and improved temporal resolutions, this imaging modality not only allows branches of the coronary artery to be evaluated, but also allows simultaneous analysis of other cardiac structures, making it extremely useful for other cardiac applications. This paper reviews the diagnostic utility and limitations of cardiac CT and how it could be integrated into clinical practice. [source]

    Comparison of echocardiography and electron beam tomography in differentiating the etiology of heart failure

    CLINICAL CARDIOLOGY, Issue 6 2000
    Thuy Le M.D.
    Abstract Background: The clinical manifestations in patients with ischemic cardiomyopathy are often indistinguishable from those in patients with primary dilated cardiomyopathy (DCM). Clinicians often base work-up of patients with heart failure on echocardiographic wall motion abnormalities; however misclassification can lead to unnecessary coronary angiography. Hypothesis: The study was undertaken to evaluate the diagnostic ability of echocardiography and electron beam tomography (EBT) to differentiate between ischemic and nonischemic cardiomyopathy. Methods: The accuracy of EBT and echocardiography was compared in 111 patients undergoing coronary angiography for the evaluation of heart failure. The presence of coronary calcification (CC) by EBT or segmental wall motion abnormalities by echocardiography was used as evidence of coronary-induced cardiomyopathy. Results: Of 63 patients, 61 (97%) with obstructive coronary artery disease had CC by EBT. This sensitivity was significantly higher compared with 43 of 63 patients (68%) with segmental wall motion abnormalities by echocardiography (p < 0.001). Of 48 patients without obstructive coronary artery disease by angiography, 39 (81%) had no CC by EBT and 35 (73%) had no segmental wall motion (global hypokinesis) by echocardiography (p = 0.33). The overall accuracy of EBT to differentiate ischemic from nonischemic cardiomyopathy was 90%, significantly higher than echocardiography (70%, p < 0.001). Conclusion: This double-blind study demonstrates that the presence of CC by EBT is superior to that of segmental wall motion abnormalities by echocardiography to distinguish ischemic from nonischemic cardiomyopathy. This modality may prove to be an important diagnostic tool when the etiology of the cardiomyopathy is not clinically evident. [source]