@article{Awikunprasert_Usongtham_Pooyodta_2014, title={Acrylic Tc-99m Flood Field Phantom for the Quality Control of a Cardiac Single Photon Emission Computed Tomography}, volume={29}, url={https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/18264}, abstractNote={<p><strong><span style="text-decoration: underline;">Background and Objective</span></strong><strong>:</strong> It is necessary to daily perform the quality control of a cardiac single photon emission computed tomography (cardiac SPECT) before the diagnosis use with patients. Flood filed phantom is the main equipment used in the examination. It contains Cobalt-57 radioisotope and is used as a standard source. Because of its half-life is short (271 days), it is needed to be replaced every two years, and at an expensive price. Therefore, the aim of this work is to study and design a flood field phantom using acrylic—which can be molded—with the use of radioactive technetium-99m.</p> <p><strong><span style="text-decoration: underline;">Methods</span></strong><strong>: </strong>The designed and created phantom will be tested with the quality control of cardiac SPECT. The results were then compared with the recommended values and the measures using Co-57 flood field phantom. The examinations included of the maximum energy (photo-peak), the energy resolution and the uniformity.</p> <p><strong><span style="text-decoration: underline;">Results</span></strong><strong>: </strong>The result showed that the mean value of the maximum power of Tc-99m was 140.48<span style="text-decoration: underline;">+</span>1.5 keV which was in the recommended range. The mean value of the energy resolution was 5.77% which was in the standard range of <span style="text-decoration: underline;"><</span>7.5%. However, the mean value of the uniformity was 64.01%, which is lower than the recommended value of <span style="text-decoration: underline;">></span> 91%.</p> <p><strong><span style="text-decoration: underline;">Conclusion</span></strong><strong>:</strong> Only two measured values from acrylic Tc-99m flood filed phantom were in the recommended ranges which were photo-peak and energy resolution. Nevertheless, the error of uniformity was ​​higher than the acceptable value. Therefore, the acrylic Tc-99m flood field phantom cannot replace the typical Co-57 flood phantom. Further studies might be performed by the use of other materials.</p>}, number={2}, journal={Srinagarind Medical Journal}, author={Awikunprasert, Panatsada and Usongtham, Parita and Pooyodta, Jintana}, year={2014}, month={May}, pages={138–144} }