CAJ | 학술논문

目的应用美国国家电器制造商协会(NEMA)2001标准对Biograph 64/True V(TV)PET/CT性能进行测试,以提供Biograph 64/TV测试数据并进行新老仪器测试结果对照.方法用NEMA 2001模型和测试方法测试Biograph 64/TV PET/CT空间分辨率、灵敏度、散射分数和计数丢失参数,测试中使用~(18)F.用空间分辨率模型测试空间分辨率.将放射性活度4.07 MBq的~(18)F注射到NEMAPET灵敏度模型,测试灵敏度,每300 s采集1次数据.测散射分数和噪声等效计数:采用散射模型,且向模型内置人活度1.037 MBq ~(18)F,采集35帧,每帧采集10 min,间隔15 min.使用体部模型图像评估图像质量,按照NEMA 2001公式得到测试结果 .结果离视野(FOV)中心1 cm处径向和轴向空间分辨率分别为4.2和4.7 nRn,10 cm处分别为4.9和5.9 nnn.系统灵敏度为6.95×10~3计数·s~(-1)·MBq~(-1).散射分数为32%,噪声等效计数率(NECR)为1.46×10~5 计数/S和9.80×10~4 计数/s.结论 Bio-graph 64/TV PET/CT性能较好,空间分辨率小,灵敏度高,散射分数低,NECR较高.
목적 응용미국국가전기제조상협회(NEMA)2001표준대Biograph 64/True V(TV)PET/CT성능진행측시,이제공Biograph 64/TV측시수거병진행신로의기측시결과 대조.방법 용NEMA 2001모형화측시방법 측시Biograph 64/TV PET/CT공간분변솔、령민도、산사분수화계수주실삼수,측시중사용~(18)F.용공간분변솔모형측시공간분변솔.장방사성활도4.07 MBq적~(18)F주사도NEMAPET령민도모형,측시령민도,매300 s채집1차수거.측산사분수화조성등효계수:채용산사모형,차향모형내치인활도1.037 MBq ~(18)F,채집35정,매정채집10 min,간격15 min.사용체부모형도상평고도상질량,안조NEMA 2001공식득도측시결과 .결과 리시야(FOV)중심1 cm처경향화축향공간분변솔분별위4.2화4.7 nRn,10 cm처분별위4.9화5.9 nnn.계통령민도위6.95×10~3계수·s~(-1)·MBq~(-1).산사분수위32%,조성등효계수솔(NECR)위1.46×10~5 계수/S화9.80×10~4 계수/s.결론 Bio-graph 64/TV PET/CT성능교호,공간분변솔소,령민도고,산사분수저,NECR교고.
Objective Biograph 64/Troe V performance measumments were performed using National Electrical Manufacturers Association(NEMA)2001 standard.It could provide PET/CT NEMA 2001data.and analyze the advantage of Biograph 64/True V PET/CT by comparing testing results with other PET/CT data.Methotis Pefformance measuremen~included spatial resolution,sensitivitv,scatter fraction and count 1oss.~(18)F was used through out the testing.Spatial resolution based on its model.About 4.07 MBq ~(18)F was iniected into NEMA PET sensitivity model and the data was collected every 300 S.Scatter fraction and noise equivalent count were tested using scatter model with 1.037 MBq ~(18)F iniected in,and the data was collected every 15 min.every fragment for 10 min.totally 35 fragments.According to NEMA 2001 formula,image quality was evaluated based on body model.Results Average transverse and axial spatial resolution at l cm and at 10 em off center was 4.2(4.7)mm and 4.6(5.9)mm respectively.System sensitivity was 6.95×10~3·s~(-1)·MBq~(-1) for the two radial positions(0 and 10 cm).System scatter fraction was 32%. And noise equivalent count rate(NECR)was 1.46×10~5/s and 9.80×10~4/s.Conclusion The integrated PET/CT system Biograph 64/True V has overall excellent performance,in particularly,good resolution,high sensitivity.low scatter fraction and good NECR response.