Akademik Veri Yönetim Sistemi
Middle East Journal of Science, cilt.9, sa.2, ss.57-66, 2023 (Hakemli Dergi)
Abstract: Cadmium Zinc Telluride (CZT) Cardiac Cameras are a special SPECT cameras with solid
state cadmium zinc telluride detectors. This diagnostic method applied in the evaluation of coronary
artery disease is well designed for myocardial perfusion scintigraphy. Aim: CZT cardiac cameras have
a limited detector area. In patients who are morbidly obese or whose heart is not in its normal location
in the body, the center of the heart and the isocenter of the device do not coincide. It is aimed to
investigate how these conditions affect the imaging performance of the CZT cardiac camera. A
homogeneous and spherical ball with a diameter of 4 cm was used for the research. To be able to
measure away from the center a wooden phantom with 8 cavities and a total length of 32 cm was
designed. The center as reference point has been determined by matching the center of the device with
the center of the sphere. For the next imaging, the image was taken by placing the spherical ball in the
other cavities, respectively, without changing the center. According to the results obtained, farther from
the center, deviations from sphericity and differences in dose distribution were observed. Counts
decreased by 1.5% in the 2nd position and 16% in the 3rd position relative to the center in the X-axis.
A disaster area has been formed and the image area has been exited from the 4th imaging. It is very
important to center the patient as much as possible, otherwise the doctor will misdiagnose.