CAJ | 학술논문

目的：评价能谱 CT 手部肌腱最佳单能量图像质量,与常规 CT 图像比较。方法对40例患者行能谱 CT 扫描,根据能谱曲线,选择65 keV 作为手部肌腱成像的最佳单能量。采用主观法和客观法2种方法分别对65 keV 单能量图像与常规混合能量图像质量进行对比分析。结果主观法中,65 keV 单能量图像质量得分高于常规混合能量图像,两者之间具有统计学差异(P <0.05)。客观法中,65 keV 单能量图像能够明显降低线束硬化伪影,提高图像质量(P <0.05)。2种方法中不同观察者之间的一致性较好(Kappa=0.75,Kappa=0.85)。结论与常规 CT 相比,65 keV 单能量图像能够明显减少线束硬化伪影,提高手部肌腱图像质量。
목적：평개능보 CT 수부기건최가단능량도상질량,여상규 CT 도상비교。방법대40례환자행능보 CT 소묘,근거능보곡선,선택65 keV 작위수부기건성상적최가단능량。채용주관법화객관법2충방법분별대65 keV 단능량도상여상규혼합능량도상질량진행대비분석。결과주관법중,65 keV 단능량도상질량득분고우상규혼합능량도상,량자지간구유통계학차이(P <0.05)。객관법중,65 keV 단능량도상능구명현강저선속경화위영,제고도상질량(P <0.05)。2충방법중불동관찰자지간적일치성교호(Kappa=0.75,Kappa=0.85)。결론여상규 CT 상비,65 keV 단능량도상능구명현감소선속경화위영,제고수부기건도상질량。
Objective To evaluate the image quality of hand tendons by using spectral CT,compared with conventional CT ima-ges.Methods Forty patients scanned with spectral CT were enrolled.The 65keV of optimal contrast-to-noise ratio (Optimal CNR) for viewing hand tendons was selected.The image quality of monochromatic GSI images (65 keV)and conventional CT images were compared with two different methods including subjective method and objective method by two radiologists respectively.Results In subjective method,the image quality in GSI images was superior to conventional CT images (P <0.05).And in objective method, the beam-hardening artifacts in the phalanges of fingers space were reduced markedly with hand tendons displaying more clearly in GSI images (P <0.05 ).There was no significant difference between the two radiologists in both methods with good correlation (Kappa=0.75,Kappa=0.85).Conclusion Spectral CT with the optimal 65keV monochromatic images could reduce the artifacts and increase image quality significantly in hand tendons imaging.It might be a very useful supplementary imaging method in detec-ting tendon diseases in routine work.