Title :
An improved method for simultaneous dual isotope Tc-99m/Tl-201 emission scintigraphy
Author :
Hademenos, George J. ; Weinstein, Howard ; McSherry, Brenda ; Leppo, Jeffrey A.
Author_Institution :
Massachusetts Univ. Med. Center, Worcester, MA, USA
Abstract :
Results are presented from a new method of Tc-99m crossover correction in dual-isotope Tc-99m/Tl-201 emission scintigraphy. This method, based on Monte Carlo simulations, utilizes a third (spilldown) image acquired in a narrow energy window to the right of the Tl-201 photopeak simultaneously with the Tc-99m and Tl-201 images. The Tc-99m spilldown image is multiplied by a conversion factor to approximate the Tc-99m crossover in the Tl-201 imaging window. The crossover Tc-99m image is then subtracted from the original Tl-201 image to produce the corrected Tl-201 image. This method was applied to dual-isotope Tc-99m/Tl-201 cardiac phantoms, with significant improvement in definition and accuracy of the Tl-201 images
Keywords :
Monte Carlo methods; cardiology; radioisotope scanning and imaging; simulation; technetium; thallium; 201Tl imaging window; 99Tc spilldown image; Monte Carlo simulations; corrected 201Tl image; crossover 99mTc image; dual isotope 99mTc/201Tl cardiac phantoms; narrow energy window; photopeak; simultaneous dual isotope 99mTc/201Tl emission scintigraphy; third spilldown image; Biomedical imaging; Imaging phantoms; Isotopes; Laboratories; Lakes; Myocardium; Nuclear medicine; Pixel; X-ray imaging; X-ray scattering;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301075
