| 显像时间与活性对PET/CT图像质量的影响 |
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| 引用本文： | 冯彦林,贺小红,黄克敏,余丰文,刘德军,袁建伟,袁白虹,苏少弟.显像时间与活性对PET/CT图像质量的影响[J].中国医学影像技术,2005,21(1):127-130. |
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| 作者姓名： | 冯彦林 贺小红 黄克敏 余丰文 刘德军 袁建伟 袁白虹 苏少弟 |
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| 作者单位： | 广东省佛山市第一人民医院PET/CT中心,广东,佛山,528000 |
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| 摘 要： | 目的探讨显像时的活性水平与显像时间对PET/CT图像质量的影响.方法分别在Jaszczak模型内高活性短采集时间、推荐活性和采集时间以及低活性长采集时间下,以全身显像方式采集发射数据;采用X线CT作衰减校正(CTAC)和全身显像方式进行图像重建.相同患者按5.18 MBq/kg给药,分别于给药50 min和90 min后采集数据,采用CTAC和全身显像方式进行图像重建.以152.026 MBq、每床位采集3 min 30 s对1例74 kg女性志愿者进行显像.结果三种显像条件所得图像都可清晰分辨模型中直径为6.4 mm的冷、热区,且均匀区域未见伪影.给药50 min后开始采集所得患者图像清晰,但有时病灶难以与正常组织区分;给药90 min后开始采集所得患者图像清晰,对比度良好,能进一步明确病灶轮廓与数量.低活性较长采集时间也能获得较好的图像质量.结论通过对活性和显像时间的平衡,明显降低了二者对PET/CT图像质量的影响.给药与开始采集数据的时间间隔最好在90 min以上.
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| 关 键 词： | 体层摄影术 发射型计算机 图像质量 质量保证 质量控制 脱氧葡萄糖 |
| 文章编号： | 1003-3289(2005)01-0127-04 |
| 收稿时间： | 2004/9/10 0:00:00 |
| 修稿时间： | 2004年9月10日 |
Impact of injected activity and scanning time to the image quality of PET/CT |
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| FENG Yan-lin,HE Xiao-hong,HUANG Ke-min,YU Feng-wen,LIU De-jun,YUAN Jian-wei,YUAN Bai-hong and SU Shao-di.Impact of injected activity and scanning time to the image quality of PET/CT[J].Chinese Journal of Medical Imaging Technology,2005,21(1):127-130. |
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| Authors: | FENG Yan-lin HE Xiao-hong HUANG Ke-min YU Feng-wen LIU De-jun YUAN Jian-wei YUAN Bai-hong and SU Shao-di |
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| Institution: | PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China;PET/CT Center, Department of Nuclear Medicine, the First People's Hospital of Foshan, Foshan 528000, China |
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| Abstract: | |
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| Keywords: | Tomography emission-computed Image quality Quality assurance Quality control Deoxyglucose |
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