نتایج جستجو برای: photon emission computed tomography
تعداد نتایج: 452864 فیلتر نتایج به سال:
Imaging the dopamine D 3 receptor (D 3 R) in humans in vivo has been hampered by the lack of suitable tools. The D 3 R is pharmacologically similar to the dopamine D 2 receptor (D 2 R), and is located in the same brain areas as the D 2 R, albeit at significantly lower density. The signal obtained from a positron emission tomography (PET) study is proportional to the target density (B avail) and...
This paper reviews the development of cerebral scintigraphy from its early days of planar imaging with simple technetium-99m labelled compounds to the recent revival of the technique in the form of positron-emission and single-photon emission tomography. A short explanation of instrumentation and radiopharmaceuticals is given as a prelude to a description of both techniques in normal and pathol...
BACKGROUND Single-photon emission computed tomography myocardial perfusion imaging defects are associated with increased all-cause mortality and cardiovascular death. However, it is unknown whether single-photon emission computed tomography myocardial perfusion imaging can identify patients at increased risk of sudden cardiac death (SCD). METHODS AND RESULTS We analyzed a cohort of 6383 patie...
RATIONALE It has been reported that epicardial adipose tissue (EAT) may affect myocardial autonomic function. OBJECTIVE The aim of this study was to explore the relationship between EAT and cardiac sympathetic nerve activity in patients with heart failure. METHODS AND RESULTS In 110 patients with systolic heart failure, we evaluated the correlation between echocardiographic EAT thickness an...
BACKGROUND In Dilated cardiomyopathy the heart is enlarged and ventricles are dilated. Gated myocardial perfusion single photon emission computed tomography is considered state of the art for myocardial perfusion imaging. A retrospective analysis was conducted to evaluate patients with dilated cardiomyopathy with Tc-99m sestamibi gated myocardial perfusion single photon emission computed tomogr...
BACKGROUND Contrast-enhanced steady state free precession (CE-SSFP) and T2-weighted short tau inversion recovery (T2-STIR) have been clinically validated to estimate myocardium at risk (MaR) by cardiovascular magnetic resonance while using myocardial perfusion single-photon emission computed tomography as reference standard. Myocardial perfusion single-photon emission computed tomography has be...
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