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6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。
Objective To explore the correlation of the position and height of the examination couch with the accuracy of image registration in art 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 Key, and 103.18 Key） 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.
出处
《南方医科大学学报》
CAS
CSCD
北大核心
2014年第8期1181-1183,共3页
Journal of Southern Medical University
基金
"十一五"国家科技计划(2007BAI05B01)~~
关键词
SPECT
CT
有效视野
检查床
同机配准度
single photon emission computed tomography/computed tomography
effective field of view
examination couch
image registration accuracy
