The value of fast low-angle shot 2-dimensional sequence with sliding multi-slice technique in the detection of abdominal metastasis of rectal cancer
- VernacularTitle:滑动多层技术的二维快速小角度激发成像序列在直肠癌腹部转移诊断中的应用价值
- Author:
Xiong BIN
;
Tobias BAUMANN
;
Feng GANSHENG
;
Arndoliver SCHAEFER
;
Mathias LANGER
- Publication Type:Journal Article
- Keywords:
Colorectal neoplasms;
Magnetic resonance imaging;
Image processing,computer-assisted
- From:
Chinese Journal of Radiology
2008;42(12):1287-1291
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the potential of a sliding multi-slice (SMS)fast low-angbe shot 2-dimensional (FLASH-2D) sequence for abdominal lesion detection in patients with rectal cancer.Methods Nineteen paired SMS MRI( FLASH-2D sequnce) and MSCT examinations of the whole abdomen and pelvis in 15 patients (four of them were examined twice) with rectal cancer were retrospectively analyzed by two radiologists.While the lesion-based agreement between the two methods and the diagnostic agreement between two observers were tested by means of Kappa statistics,the sensitivities of SMS FLASH-2D and MSCT to detect liver metastases,lymph node metastases and bone metastases were calculated.Standard of reference consisted of a consensus evaluation of SMS,MSCT and all available follow-up examinations after a period of 6 months.Results Using SMS FLASH-2D cumulatively,both observers detected 56 of all 60 lesions respectively resulting in same sensitivities of 93.33% (56/60).Using MSCT,both observers detected 50 lesions,resulting in same sensitivities of 83.33 % (50/60) respectively.The sensitivities of SMS FLASH-2D to detect hepatic metastases were 97.44% (38/39) and 100% (39/39) for both observers respectively,compared to 100 % (39/39)and 100% (39/39)for MSCT.The sensitivities for lymph node metastases were 85.71% (12/14) and 71.43% (10/14) for SMS FLASH-2D compared to 78.57% (11/14) and 71.43% (10/14) for MSCT.The sensitivities for bone metastases were 85.71% (6/7) and 100% (7/7) for SMS FLASH 2D compared to 0(0/7) and 14.29% (1/7) for MSCT.Conclusion SMS FLASH-2D imaging and MSCT exhibit equal ability of detecting lymph node and liver metastases,but SMS FLASH 2D seems better than MSCT in dectecting bone metastases.
