Investigation of optimal acquisition time of myocardial perfusion scintigraphy using cardiac focusing-collimator

Arisa Niwa; Shinji Abe; Naotoshi Fujita; Hidetaka Kono; Tetsuro Odagawa; Yusuke Fujita; Saki Tsuchiya; Katsuhiko Kato

doi:10.1117/12.2081703

18 March 2015 Investigation of optimal acquisition time of myocardial perfusion scintigraphy using cardiac focusing-collimator

Arisa Niwa, Shinji Abe, Naotoshi Fujita, Hidetaka Kono, Tetsuro Odagawa, Yusuke Fujita, Saki Tsuchiya, Katsuhiko Kato

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Proceedings Volume 9412, Medical Imaging 2015: Physics of Medical Imaging; 94124T (2015) https://doi.org/10.1117/12.2081703
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

Recently myocardial perfusion SPECT imaging acquired using the cardiac focusing-collimator (CF) has been developed in the field of nuclear cardiology. Previously we have investigated the basic characteristics of CF using physical phantoms. This study was aimed at determining the acquisition time for CF that enables to acquire the SPECT images equivalent to those acquired by the conventional method in 201TlCl myocardial perfusion SPECT. In this study, Siemens Symbia T6 was used by setting the torso phantom equipped with the cardiac, pulmonary, and hepatic components. 201TlCl solution were filled in the left ventricular (LV) myocardium and liver. Each of CF, the low energy high resolution collimator (LEHR), and the low medium energy general purpose collimator (LMEGP) was set on the SPECT equipment. Data acquisitions were made by regarding the center of the phantom as the center of the heart in CF at various acquisition times. Acquired data were reconstructed, and the polar maps were created from the reconstructed images. Coefficient of variation (CV) was calculated as the mean counts determined on the polar maps with their standard deviations. When CF was used, CV was lower at longer acquisition times. CV calculated from the polar maps acquired using CF at 2.83 min of acquisition time was equivalent to CV calculated from those acquired using LEHR in a 180°acquisition range at 20 min of acquisition time.

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Arisa Niwa, Shinji Abe, Naotoshi Fujita, Hidetaka Kono, Tetsuro Odagawa, Yusuke Fujita, Saki Tsuchiya, and Katsuhiko Kato "Investigation of optimal acquisition time of myocardial perfusion scintigraphy using cardiac focusing-collimator", Proc. SPIE 9412, Medical Imaging 2015: Physics of Medical Imaging, 94124T (18 March 2015); https://doi.org/10.1117/12.2081703

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KEYWORDS

Single photon emission computed tomography

Collimators

Data acquisition

Signal attenuation

3D image reconstruction

Scintigraphy

Cardiology

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