V/Q Scanning Using SPECT and SPECT/CT
نویسندگان
چکیده
منابع مشابه
V/Q scanning using SPECT and SPECT/CT.
Planar ventilation-perfusion (V/Q) scanning is often used to investigate pulmonary embolism; however, it has well-recognized limitations. SPECT overcomes many of these through its ability to generate 3-dimensional imaging data. V/Q SPECT has higher sensitivity, specificity, and accuracy than planar imaging and a lower indeterminate rate. SPECT allows for new ways to display and analyze data, su...
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Introduction: Nowadays, Imaging of the myocardial perfusion (MPI) using the single photon emission tomography (SPET) in the diagnosis of coronary artery disease, especially myocardial ischemia, is of great importance. In contrast to the coronary artery angiography, MPI is non-invasive, less expensive and more physiological. Unfortunately, this image is affected by the some artifacts. Thes...
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The diagnostic accuracy of single photon emission computed tomography (SPECT) is profoundly influenced by attenuation phenomenon. Soft tissue attenuation degrades cardiac SPECT image quality, thereby decreasing the possibility of the detection of the lesions. A variety of correction techniques based on different assumptions have been used to reduce the impact of attenuation. Several types of sy...
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This paper examines two vector quantization algorithms which can combine the tasks of compression and classiication: Bayes risk weighted vector quantization (BRVQ) proposed by Oehler et al., and Optimized Learning Vector Quantization 1 (OLVQ1) proposed by Kohonen et al. BRVQ uses a parameter to control the tradeoo between compression and clas-siication. BRVQ performance is studied for a range o...
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The assessment of coronary artery calcium (CAC) by electron beam tomography (EBT) or multidetector spiral computed tomography (CT) and the evaluation of myocardial perfusion and function by use of myocardial perfusion single photon emission computed tomography (SPECT) (MPS) are both valuable in the noninvasive assessment of patients with suspected coronary artery disease (CAD). CAC provides uni...
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ژورنال
عنوان ژورنال: Journal of Nuclear Medicine
سال: 2013
ISSN: 0161-5505,2159-662X
DOI: 10.2967/jnumed.113.124602