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Objective(s): Yttrium-90 (90Y) is a beta particle nuclide used in targeted radionuclide therapy which is available to both single-photon emission computed tomography (SPECT) and time-of-flight (TOF) positron emission tomography (PET) imaging. The purpose of this study was to assess the image quality of PET and Bremsstrahlung SPECT by simulating PET and SPECT images of 90Y using Monte Carlo simu...
UNLABELLED As SPECT/CT technology evolves, its applications and indications need to be evaluated clinically for more efficient and cost-effective use. This retrospective study evaluated the clinical value of simultaneously acquired (99m)Tc-sestamibi SPECT/CT versus conventional SPECT in diagnosing and locating parathyroid adenomas or hyperplasia in patients with primary hyperparathyroidism. M...
In the context of a standard equilibrium matching framework, this paper considers how a duration-dependent unemployment insurance (UI) system affects the dynamics of unemployment and wages in an economy subject to stochastic job-destruction shocks. It establishes that re-entitlement effects induced by a finite duration UI program generate intertemporal transfers from firms that hire in future b...
BACKGROUND Perfusion-cardiovascular magnetic resonance (CMR) is generally accepted as an alternative to SPECT to assess myocardial ischemia non-invasively. However its performance vs gated-SPECT and in sub-populations is not fully established. The goal was to compare in a multicenter setting the diagnostic performance of perfusion-CMR and gated-SPECT for the detection of CAD in various populati...
OBJECTIVES A novel IQ-SPECT™ method has become widely used in clinical studies. The present study compares the quality of myocardial perfusion images (MPI) acquired using the IQ-SPECT™ (IQ-mode), conventional (180° apart: C-mode) and L-mode (90° apart: L-mode) systems. We assessed spatial resolution, image reproducibility and quantifiability using various physical phantoms. METHODS SPECT imag...
UNLABELLED The coronary artery calcium (CAC) score is a readily and widely available tool for the noninvasive diagnosis of atherosclerotic coronary artery disease (CAD). The aim of this study was to investigate the added value of the CAC score as an adjunct to gated SPECT for the assessment of CAD in an intermediate-risk population. METHODS Seventy-seven prospectively recruited patients with ...
introduction: scintigraphy has been considered as a useful tool in the assessment of meniscal tears. our objective was to assess the accuracy of single photon emission tomography (spect), using mri as the gold standard, in the diagnosis of meniscal tears. materials and methods: between january 2003 and february 2005, 45 patients were studied with spect and mri. results: the respective sensitivi...
اختلالات مغزی به دو دسته آناتومیکی و فیزیولوژیکی تقسیم می شوند. از آنجائیکه اختلالات مغزی ابتدا به صورت یک عارضه فیزیولوژیکی ظاهر می شوندو در نهایت دارای آثار آناتومیکی می شوند، مطالعه فیزیولوژی و آناتومی مغز در کنار یکدیگر لازم و ضروری است. تصاویر mri و ct قدرت تفکیک مکانی بهتری داشته و حاوی اطلاعات آناتومیکی هستند و تصاویر spect و pet دارای اطلاعات فیزیولوژیکی هستند. اگر بتوان این دو ویژگی را...
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