摘要
目的:探讨PET/CT-MRI三模式在直肠癌局部分期中的诊断效能,比较PET/MRI融合与盆腔MRI、PET/CT在盆腔局部分期中的准确性。方法:回顾性分析35例直肠癌患者术前PET/CT与盆腔MRI图像,并进行PET与MRI图像的融合,比较PET/MRI融合图像、盆腔MRI、PET/CT在直肠癌局部分期的诊断价值。结果:35例直肠癌患者,病理及随访结果为T1期2例,T2期5例,T3期25例,T4期3例。在T分期方面,PET/MRI融合评价直肠癌术前盆腔局部T分期的准确率为85.7%(30/35),与病理及随访结果一致性较好(Kappa值为0.708);PET/CT评价直肠癌术前盆腔局部T分期的准确率为65.7%(23/35),与病理及随访结果一致性一般(Kappa值为0.432)。在N分期方面,PET/MRI融合、盆腔MRI的准确率均为65.7%(23/35),与病理及随访结果一致性较差(Kappa值分别为0.320、0.380)。结论:PET/MRI融合图像结合PET/CT与盆腔MRI两者的优势,在直肠癌局部分期具有重要的诊断价值,在T分期中比PET/CT具有优势,在N分期中与盆腔MRI价值相当。
Purpose： To study the diagnostic value of tri-modality PET/CT-MR imaging in the preoperative staging of rectal cancer and to compare the accuracy of fused PET/MRI, pelvic MRI and PET/CT. Methods： Preoperative PET/CT imaging and MRI data of 35 patients with pathologically confirmed rectal cancer were retrospectively analyzed. PET imaging and MRI imaging were fused, and then the accuracy of fused PET/MRI, pelvic MRI and PET/CT in the local staging of the pelvic cavity was compared. Results： Thirty-five patients were with rectal cancer. Pathological and follow-up examination proved T1 stage in two cases, T2 stage in five cases, T3 stage in 25 cases, and T4 stage in 3 cases. The overall accuracy rates of the fused PET/MRI in the T stage of rectal cancer was 85.7% （30/35）. There was a good consistency between fused PET/MRI assessment and pathological findings （kappa=0.708）. The accuracy rate of PET/CT assessment for preoperative T staging was 65.7% （23/35）, showing a consistency with the pathological result （kappa=0.432）. Fused PET/MRI and pelvic MRI had equivalent value of 65.7% （23/35） in N stage （kappa=0.320, 0.380）. Conclusion： Fused PET/MRI was superior to PET/CT in preoperative T staging of rectal cancer and had equivalent value with pelvic MRI in N staging.
出处
《中国医学计算机成像杂志》
CSCD
北大核心
2017年第2期185-190,共6页
Chinese Computed Medical Imaging
