CAJ | 학술논문

为实现窄角扇束扫描方式下的CT图像重建，结合窄角扇束扫描方式的特点，对已有的重排算法进行了改进，加入了数据对齐环节，实现了窄角扇束扫描投影数据的同步性。为验证改进的重排算法的有效性，利用窄角扇束工业CT对某型固体火箭发动机进行CT检测，并分别用改进前后的重排算法对获得的投影数据进行重建。结果表明，改进后的重排算法重建的图像能够很好地反映固体火箭发动机的内部结构，对固体火箭发动机的无损探伤和寿命预估具有重要意义。
위실현착각선속소묘방식하적CT도상중건，결합착각선속소묘방식적특점，대이유적중배산법진행료개진，가입료수거대제배절，실현료착각선속소묘투영수거적동보성。위험증개진적중배산법적유효성，이용착각선속공업CT대모형고체화전발동궤진행CT검측，병분별용개진전후적중배산법대획득적투영수거진행중건。결과표명，개진후적중배산법중건적도상능구흔호지반영고체화전발동궤적내부결구，대고체화전발동궤적무손탐상화수명예고구유중요의의。
To reconstruct computed tomography ( CT) image for narrow fan beam scan, the existing rebinning algorithm was improved considering the characteristic of narrow fan beam scan mode. The process of data shake?up was introduced and synchronic?ity of narrow fan beam projection data was realized. To test the effectiveness of the improved rebinning algorithm, one solid rocket motor( SRM) was tested by using narrow fan beam industrial CT. Existing and improved rebinning algorithms were used to recon?struct collected projection data. Results show that the improved rebinning algorithm reconstructs the inner structure of SRM well. This is of great significance to nondestructive testing and life prediction of SRM.