Results 221 to 230 of about 170,216 (266)
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Hepatic Hemangioma Diagnosis by Emission Computed Tomography
Clinical Nuclear Medicine, 1986Hepatic hemangiomas in an asymptomatic patient usually require no treatment. Therefore, noninvasive diagnosis of this entity is critical to avoid an unnecessary diagnostic laparotomy and/or closed biopsy, the latter potentially leading to massive or fatal hemorrhage.
M A, Talley, D L, Nguyen, J C, Leonard
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Myocardial Imaging Using Emission Computed Tomography
Radiology, 1978Single-photon emission computed tomography (ECT) was evaluated during myocardial studies in dogs. Acute anterior and posterior infarcts were imaged following injection of 99mTc-pyrophosphate or 201Tl. In most cases, tomographic delineation of infarct location and extent correlated with tissue section.
J W, Keyes +5 more
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Attenuation Correction in Gamma Emission Computed Tomography
Journal of Computer Assisted Tomography, 1981A method of computing tomographic images from single photon radionuclide emission data is presented. The method takes into account attenuation of gamma rays inside the source and makes use of an iterative technique, based on the difference between the projection data obtained from the source and computed projections, called reprojections, from ...
T E, Walters +3 more
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Iterative reconstruction techniques in emission computed tomography
Physics in Medicine and Biology, 2006In emission tomography statistically based iterative methods can improve image quality relative to analytic image reconstruction through more accurate physical and statistical modelling of high-energy photon production and detection processes. Continued exponential improvements in computing power, coupled with the development of fast algorithms, have ...
Jinyi, Qi, Richard M, Leahy
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Single Photon Emission Computed Tomography Tracer
2020Single photon emission computed tomography (SPECT) is the state-of-the-art imaging modality in nuclear medicine despite the fact that only a few new SPECT tracers have become available in the past 20 years. Critical for the future success of SPECT is the design of new and specific tracers for the detection, localization, and staging of a disease and ...
Pietzsch, H.-J. +3 more
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Single Photon Emission Computed Tomography Tracer
2012Single photon emission computed tomography (SPECT) is the state-of-the-art imaging modality in nuclear medicine despite the fact that only a few new SPECT tracers have become available in the past 20 years. Critical for the future success of SPECT is the design of new and specific tracers for the detection, localization, and staging of a disease and ...
Müller C, Schibli R
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QUANTITATIVE POTENTIALS OF DYNAMIC EMISSION COMPUTED TOMOGRAPHY
Journal of Computer Assisted Tomography, 1979Statistical uncertainties in emission computed tomography were simulated in 60 computer studies involving various numbers of events and distributions of activity. Previous studies have shown that for a uniform disc of activity of rms percentage of uncertainty per resolution cell is: 120 X (number of resolution cells)1/4 X (number of events per ...
T F, Budinger +4 more
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Positron emission tomography and single photon emission computed tomography
Current Opinion in Neurology, 1996Neuroimaging techniques have had a dramatic impact on the evaluation and treatment of patients with epilepsy. In order to take full advantage of their potential, it is important to place them in clinical and electrophysiological context and to understand their technical limitations. Positron emission tomography with 18F-2-deoxyglucose and single photon
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Single photon emission computed tomography in epilepsy
Seminars in Nuclear Medicine, 1990Functional brain imaging by either single photon emission computed tomography (SPECT) or positron emission tomography (PET) is now a well-established technique in the diagnosis and evaluation of the epilepsies. Perhaps only in stroke have these emerging technologies proven of greater significance. Scalp, cortical, or depth electroencephalographic (EEG)
M D, Devous, R F, Leroy, R W, Homan
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[Positron emission computed tomography].
Journal of cardiology. Supplement, 1989Positron emission computed tomography (PET) provides high quality tomographic images of the heart with accurate attenuation correction. The use of various compounds labeled with ultra-short lived positron-emitting radionuclides, such as 11C, 13N, 15O and 18F, allows physiological and biochemical measurements in vivo.
K, Torizuka, S, Koga
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