نتایج جستجو برای: perfusion quantification
تعداد نتایج: 128697 فیلتر نتایج به سال:
BACKGROUND Myocardial perfusion SPECT (MPS) is one of the frequently used methods for quantification of perfusion defects in patients with known or suspected coronary artery disease. This article describes open access software for automated quantification in MPS of stress-induced ischemia and infarction and provides phantom and in vivo validation. METHODS AND RESULTS A total of 492 patients w...
BACKGROUND Recent studies have shown that quantification of myocardial perfusion (MP) at stress and myocardial perfusion reserve (MPR) offer additional diagnostic and prognostic information compared to qualitative and semi-quantitative assessment of myocardial perfusion distribution in patients with coronary artery disease (CAD). Technical advancements have enabled fully automatic quantificatio...
Background Perfusion imaging visualizes early changes within the ischaemic cascade and has been shown to accurately detect significant coronary artery stenoses. First pass myocardial perfusion CMR yields high spatial resolution and permits quantification of myocardial blood flow. However, perfusion-CMR has only been validated in a small number of previous studies and using relatively early perf...
Background Stress perfusion cardiac MRI (CMR) with a high relaxivity blood-pool contrast agent should allow for improved quantification of myocardial perfusion and myocardium blood volume in patients with coronary artery disease (CAD). In the current study, we sought to evaluate the diagnostic performance and image quality of stress perfusion CMR using the intravascular contrast agent gadofoves...
BACKGROUND Quantification of cardiovascular magnetic resonance (CMR) myocardial perfusion reserve (MPR) at 1.5 Tesla has been shown to correlate to invasive evaluation of coronary artery disease (CAD) and to yield good inter-observer agreement. However, little is known about quantitative adenosine-perfusion CMR at 3 Tesla and no data about inter-observer agreement is available. Aim of our study...
Fig 4. (a) homogeneous contrast image, (b) proton density, (c)perfusion image quantified with (a), and (d) perfusion image quantified with (b). Fig 3. In-vivo signal intensities as a function of r1 values. Table 1. Perfusion of GM and WM from different methods. Perfusion (ml/100g.min) GM WM quantified with PD and λ 76.3 ± 5.7 23.2 ± 6.0 quantified with PD, λg, λw 83.1 ± 6.2 21.1 ± 5.5 quantifie...
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