[Transperineal prostate biopsy guided by dynamic intracavitary three-dimensional contrast-enhanced tomographic ultrasound imaging].

Objective: To investigate the application value of dynamic intracavitary three-dimensional contrast-enhanced tomographic transrectal ultrasound imaging (3D-CETRUS TUI) in transperineal prostate biopsy for patients with different levels of PSA.

Methods: This prospective study included 180 patients with escalated levels of PSA (≥4 μg/L) or abnormal results of digital rectal examination. According to the level of PSA, the patients were divided into groups A (PSA ≤10 μg/L, n = 104) and B (PSA >10 μg/L, n = 76), and all underwent intracavitary 3D-CETRUS TUI followed by transperineal prostate biopsy under the guidance of two-dimensional gray-scale ultrasound, which involved a standard 12-core transperineal systematic prostate puncture by intracavitary biplane probe and then a 2-core puncture in the abnormal region displayed by 3D-CETRUS TUI.

Development of an Ultrasound Prediction Model to Discriminate between Malignant and Benign Liver Lesions.

To discriminate between malignant and benign liver lesions, we evaluated the ultrasound features of the target lesions in 266 patients and established a prediction model using a logistic regression algorithm. The prediction model based on independent factors was expressed as predictive score = 1.129 × interaction of irregular shape and unclear boundary + 1.