All CT scans were performed using the picture archiving and communication system (PACS; Pathspeed, Pathspeed, GE Medical Systems Integrated Imaging Solutions) and were independently evaluated by two radiologists imaging features. The two radiologists did not know the clinical indicators or pathological findings. A consensus was reached by joint discussion when there was disagreement between the two physicians. The main observations were the maximum length of the lesion; its location (divided into base, base + body, body, body + neck, and neck); the number of the lesion (single or multiple); the base status (the base width of GPs was as about Yamada’s classification: the angle between the protuberance of the GPs and the basement mucosa > 90° is referred to as the wide base, whereas the angle < 90°is defined narrow base [11 (link)]); gallbladder stones (absent or present); and lesions CT values in the plain and triphasic dynamic enhanced scan.
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