방광 팬텀 제작을 통한 충만여부에 따른 방광 주변 병변에 대한 영상 평가

Development of Bladder Phantom and Image Evaluation of Lesion in the Vicinity according to Filling and Empty Bladder

Purpose In this study, we evaluated image quality of lesion in the vicinity according filling and empty bladder developing bladder phantom. Materials and Methods Bladder phantom was developed by modifying NEMA IEC body phantom. Air-balloon was described as bladder and 6 insert were set as lesion in the vicinity bladder according to distance. The images were evaluated in terms of % BV, comparison of SUV and peak count rate (Single, Random and True count). Results % BV was decreased far away from bladder. There were different for SUV about 7.8 ± 3.8 % between filling and empty bladder. True count rate was decreased about 38 %. Single and random count were increased about 44, 61%. Conclusion When the lesion is close to bladder, noise is increased. That’s why prior to PET-CT scan, It is important to urinate. and It helps patient to get the accurate result.