INVESTIGATION OF CENTERING PROBLEM IN THE CADMIUM ZINC TELLURIDE (CZT) CARDIAC CAMERA

Year 2023, , 57 - 66, 29.12.2023

Eda Mutlu , Bilal Kovan , Emine Göknur Işık , Serkan Kuyumcu , Bayram Demir

https://doi.org/10.51477/mejs.1269886

Abstract

Introduction: 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 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 aim to investigate how these conditions affect the imaging performance of the CZT cardiac camera. Methods: 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 were taken by placing the spherical ball in the other cavities, respectively, without changing the center. Results: 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. Conclusion: It is very important to center the patient as much as possible, otherwise the doctor will misdiagnose.

Keywords

Cardiac Imaging, (CZT) SPECT, Nuclear Medicine, Centering Problem

References

• Ben-Haim, S., Kennedy, J., Keidar. Z., “Novel Cadmium Zinc Telluride Devices for Myocardial Perfusion Imaging-Technological Aspects and Clinical Applications”, Seminars in Nuclear Medicine, 46(4):273-85, 2016.
• Baumgarten, R., et al., “Radiation exposure after myocardial perfusion imaging with Cadmium-Zinc-Telluride camera versus conventional camera”, J Nucl Cardiol., 28(3):992-999, 2020.
• Henzlova M.J., Duvall L., “Is the CZT technology the future of nuclear cardiology?” Journal of Nuclear Cardiology, 29:737–740, 2020.
• Duncker, D.J., Koller, A., Merkus, D., Cantry Jr J.M., “Regulation of coronary blood flow in health and ischemic heart disease”, Progress in Cardiovascular Diseases, 57(5):409-422, 2015.
• Agostini, D., et al., “Performance of cardiac cadmium-zinc-telluride gamma camera imaging in coronary artery disease: a review from the cardiovascular committee of the European Association of Nuclear Medicine (EANM)”, Eur J Nucl Med Mol Imaging, 43(13):2423-2432, 2016.
• Zhang, Y.Q., et al. “Diagnostic value of cadmium-zinc-telluride myocardial perfusion imaging versus coronary angiography in coronary artery disease: A PRISMA-compliant meta-analysis”, Medicine (Baltimore), 98(9): e14716, 2019.
• Zhang H., et al., “Left ventricular mechanical dyssynchrony assessment in obese patients using the cadmium-zinc telluride SPECT camera”, The International Journal of Cardiovascular Imaging, 36(4):757–765, 2020.
• Ljungberg M., Pretorius H., “SPECT/CT: an update on technological developments and clinical applications”, British Institute of Radiology, 91(1081):20160402, 2018.
• Buechel, R.R., et al., “Ultrafast nuclear myocardial perfusion imaging on a new gamma camera with semiconductor detector technique: First clinical validation”, Eur J Nucl Med Mol Imaging, 37(4):773-778, 2010.
• Kincl, V., Drozdova, A., Vasina, J., Panovsky, R., Kaminek, M., “Cadmium–zinc–telluride SPECT scanners – New perspectives in nuclear cardiology”, Cor et Vasa, 57(3): e214-e218, 2015.
• Budzyńska, A., Osiecki, S., Mazurek, A., Piszczek, S., Dziuk, M., “Feasibility of myocardial perfusion imaging studies in morbidly obese patients with a cadmium-zinc-telluride cardiac camera”, Nucl Med Rev Cent East Eur., 22(1):18-22, 2019.
• Fiechter, M., et al., “Cadmium-Zinc-Telluride Myocardial Perfusion Imaging in Obese Patients”, The Journal Of Nuclear Medicine, 53(9):1401-6, 2012.
• Hindorf, C., Oddstig, J., et al., “Importance of correct patient positioning in myocardial perfusion SPECT when using a CZT camera”, Journal of Nuclear Cardiology, 21(4):695-702, 2014.