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| 有效视野内检查床的变化对SPECT/CT同机配准度的影响 | |
| 引用本文： | 胡志辉,王思云,王淑侠,朱林波.有效视野内检查床的变化对SPECT/CT同机配准度的影响[J].南方医科大学学报,2014,34(8):1181-1183. |
| 作者姓名： | 胡志辉 王思云 王淑侠 朱林波 |
| 作者单位： | 广东省医学科学院//广东省人民医院核医学科,广东广州,510080 |
| 基金项目： | “十一五”国家科技计划(2007BAI05B01)Supported,by,the,Supporting,Program,of,the,"Eleventh,Five-year,Plan",for,Sci,&,Tech,Research,of,China(项目编号：2007BAI05B01) |
| 摘 要： | 目的探讨检查床位置的变化对SPECT/CT有效视野同机图像配准精度的影响及达到最佳配准效果时检查床的位置。方 法采用六个放射性点源153Gd（40.9 kev组、41.54 kev组、103.18 kev组，2个1组，共3个能量峰组）、标准模型，CT断层位置不变， 分别通过改变床位与床高，得到13组原始断层数据，利用仪器自带的ALIGNMENT软件获得配准度偏差，比较不同床位与床高 配准偏差值。结果最小配准度误差：Z轴在0 cm，Y轴在-4 cm处；即最佳的配准位置。结论进行SPECT断层与CT图像的同 机融合，如果两种图像达不到较佳融合，就必须进行图像配准度的质控，必要时进行图像配准度的校准。 |
| 关 键 词： | SPECT/CT 有效视野 检查床 同机配准度 |
Correlation of examination couch position and height with image registration accuracy in an effective field of vision of SPECT/CT |
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| HU Zhihui , WANG Siyun , WANG Shuxia , ZHU Linbo.Correlation of examination couch position and height with image registration accuracy in an effective field of vision of SPECT/CT[J].Journal of Southern Medical University,2014,34(8):1181-1183. | |
| Authors: | HU Zhihui WANG Siyun WANG Shuxia ZHU Linbo |
| Abstract: | Objective To explore the correlation of the position and height of the examination couch with the accuracy of image registration in an exact effective field of vision (FOV) of single photon emission computed tomography/computed tomography (SPECT/CT) and determine the optimal position of the examination couch for best image registration. Methods The tests were performed on a SPECT/CT with 6 radioactive 153Gd sources in 3 groups (two in each group with energy peak of 40.9 Kev, 41.54 Kev, and 103.18 Kev) in an assorted standard pattern. Thirteen groups of slice data were obtained by changing the position and height of the bed but keeping the tomograpy slice constant. The bias of the accuracy of image registration was acquired using ALIGNMENT software and compared for different examination couch positions and heights. Results The position of the examination couch at 0 cm in the Z axis and -4 cm in the Y axis showed the least error of image registration. Conclusion To achieve optimal SPECT and CT image fusion, quality control must be implemented and calibration of image registration accuracy should be done when necessary. |
| Keywords: | single photon emission computed tomography/computed tomography effective field of view examination couch image registration accuracy |
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