基于外部定位框的PET和CT图像异机融合方法  

PET and CT cross-modality medical image fusion based on out-location frame

作　　者：徐子海[1] 廖福锡[1] 贺志强[2] 倪倩[2] 

机构地区：[1]解放军303医院放疗中心,广西南宁530021 [2]南方医科大学生物医学工程学院,广东广州510515

出　　处：《南方医科大学学报》2010年第6期1304-1306,共3页Journal of Southern Medical University

基　　金：广东省自然科学基金(06024583);广东省科技计划项目(2007B01040056)

摘　　要：目的研究一种基于外部定位框的PET和CT图像异机融合新方法,实现PET和CT异机图像的准确融合。方法采用自行研制的新型外部定位框,获取CT/PET异机扫描定位图像,利用固定的标记点进行配准,最后运用变分法和小波变换结合进行图像融合。结果以CT图像为基准用灰度色阶显示,PET图像叠加在CT图像上,用彩色色阶显示,得到基于外部定位架的CT/PET融合后图像。结论利用该方法获取CT/PET异机扫描定位标记点图像清晰,配准融合后图像准确。该方法具有结构简单和使用方便的特点,值得临床推广。Objective To develop a new method of PET and CT cross-modality medical image fusion based on out-location frame.Methods PET/CT cross-modality medical images were obtained based on the out-location frame and the external fiducial marker on the frame was used for rigid medical image registration.A variation model based on the wavelet transform was used for image fusion.Results The CT images were displayed by grey scale and overlaid with the PET images displayed by chromatic scale to obtain the image after registration and fusion.Conclusion The method of external markers registration can be effective and accurate in achieving PET and CT image fusion.

关 键 词：放射治疗 CT/PET 异机图像融合 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]