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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 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)
Richard W. Homan +2 more
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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 ...
William L. Greenberg +4 more
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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 ...
Roger Schibli +4 more
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SPECT: SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
Journal of Computer Assisted Tomography, 1980Interest in single photon emission computed tomography (SPECT) has been renewed as a result of the successful application of transmission (x-ray) CT to diagnostic radiology. Many aspects of SPECT are different from those encountered in transmission CT, and often are more difficult to overcome.
R. Edward Coleman +2 more
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Single-Photon Emission Computed Tomography/Computed Tomography in Endocrinology
Seminars in Nuclear Medicine, 2006The introduction of fusion of functional and anatomical imaging modalities into the field of endocrinology led to a major breakthrough in diagnosis, staging, and follow-up of patients with endocrine tumors. The management of endocrine tumors is based on a wide variety of conventional techniques, including computed tomography, ultrasound, or magnetic ...
Ora Israel, Ora Israel, Yodphat Krausz
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Single Photon Emission Computer Tomography
2018In diesem Kapitel wird in den hauptsachlichen Aufbau und die wesentliche Funktionsweise konventioneller SPECT-Systeme eingefuhrt, wie sie in der standardmasigen nuklearmedizinischen Diagnostik Anwendung finden. Den zentralen Bestandteil eines konventionellen SPECT-Systems bilden i. Allg. mehrere Gammakameras, welche an einer rotierenden Aufnahmeeinheit
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Single-Photon Emission Computed Tomography/Computed Tomography in Abdominal Diseases
Seminars in Nuclear Medicine, 2007Single-photon emission computed tomography (SPECT) studies of the abdominal region are established in conventional nuclear medicine because of their easy and large availability, even in the most peripheral hospitals. It is well known that SPECT imaging demonstrates function, rather than anatomy.
SCHILLACI, ORAZIO +3 more
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Emission computed tomography in strokes
Surgical Neurology, 1985POZZILLI, Carlo +2 more
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The Identification Problem in Emission Computed Tomography
1981In (single photon) emission computed tomography one has to compute the activity distribution f(x) and the distribution of the attenuation coefficient μ (x) from the integral equation $$\mathop \smallint \limits_{L(s,\omega )} f(x){e^{ - (M\mu )(x,\omega )}}dx = g(s,w)$$ where ω is a unit vector, L(s, ω) is the straight line perpendicular to a ω ...
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