NGHIÊN CỨU ỨNG DỤNG CÔNG NGHỆ XỬ LÝ ẢNH XSPECT TRONG GHI HÌNH PHÓNG XẠ SPECT/CT

Abstract

Objectives of the study: Application of xSPECT image processing technology in SPECT/CT radiographic imaging. Subjects and methods: SPECT/CT of Siemens, Germany. xSPECT software; Phan-tom water; SPECT/CT bone scan with 99mTc-MDP in patients with prostate carcinoma. Results: Results using four reconstruction methods: xSPECT Quant (xQ); xSPECT Bone™ (xB); Flash 3D (F3D); OSEM, shows that the system matrix modeling is more accurate than the updated schema. Quantitative results of background and 6 spheres using xE, xQ and xB with 3 degree and 6 degree angle sampling after many updates, all methods give very accurate estimates (nearly 100 %) to the background and the results are stable with updates. Bone scintigraphy in 40 prostate cancer patients by SPECT/CT with 99mTc-MDP detected 50 lesions, of which: SPECT 60% (30/50) was said to be unclear, when use of XSPECT with SPECT/CT clarified the diagnosis in 52% of suspected lesions only 8% (4/50) remained unclear.