用于放射治疗中PET/CT异机图像融合的新型头颈部定位框的研制

Development of a New Head and Neck Location Frame for PET and CT Cross-modality Medical Image Fusion in Radiotherapy

研制用于PET/CT异机图像融合的新型头颈部定位框,实现PET/CT异机图像的准确融合。将原用于CT定位的定位框的N形定位槽孔的实心标志杆替换成空心封闭圆管,在实施CT和PET扫描时分别灌注不同的显影液进行定位照射。分别得到带有9个清晰标志点的CT图像和PET图像。利用该方法所获PET/CT异机扫描定位标记点图像清晰,可用于两图像准确地配准融合。该方法具有结构简单和使用方便的特点,值得临床推广。

A new head and neck location frame for positron emission tomography（PET） and computed tomography（CT） cross-modality medical image fusion in radiotherapy was developed.The solid mark bars of N form in the old designed CT location frame were replaced by closed hollow pipes which could be filled with different developer solutions before CT or PET scan,respectively.Nine points of external marker used for registration and fusion were obtained in CT images and PET images,respectively.The locations of the two sets of nine points showed the method of registration to be effective and accurate in achieving the PET and CT image fusion.This method,based on its characteristics of simple structure and easy-to-use,can be of wide application in clinical setting.