Extra absorbed dose assessment of cardiac and other tissues around the cardiac during transmission attenuation correction of cardiac spect imaging

Abstract

Photon attenuation in cardiac single photon emission computed tomography (SPECT) is a well recognized problem, leading to artifacts and inaccuracies in reconstructed images therefore the attenuation correction in SPECT images is necessary. Most of the attenuation correction methods are available in clinics use attenuation map which obtained with different transmission scanning sources. Using transmission source in this correction method increases the received dose by cardiac and other tissues around it. The object of this study is to assess the extra absorbed dose of cardiac and other tissues around it during the Transmission Attenuation Correction (TAC) of cardiac SPECT imaging. So using Monte Carlo method the cardiac and torso were simulated in cylindrical coordinate then the extra absorbed dose of cardiac and its surrounding tissues during TAC were calculated. The results showed cardiac, its surrounding tissues and skin have absorbed non-considerable extra absorbed dose which are much lower than the reported limits by ICRP103. © 2012 RAD Conference Proceedings. All rights reserved.