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The measurements of APTw in Rectal Cancer: the impact of ROI methods on APTw values and interobserver variability

Xiaoyao Lei¹, Yaxin Niu¹, Longchao Li¹, Min Tang¹, Yanrong Yang¹, Xiaoling Zhang¹, Xin Zhang¹, Juan Li¹, and Xiuzheng Yue²
¹Shaanxi Provincial People's Hospital, Xi-an, China, ²Philips Healthcare, Beijing, China

This study showed that whole volume ROI method was reproducible and could reflect the pathophysiological condition of the tumor.

Fig.1 A61-year-old male patient with rectal cancer. T2W image (A), APTw-T2WI fusion image (B), small solid samples methodimage (C) and single slice ROI methodimage (D) showed the lesion in rectal.

Table 1 The consistency of APTw parametersby two radiologists.