Multitask Deep Neural Network for the Fully Automatic Measurement of the Angle of Progression

Figure 1

A schematic overview of automatic measurement of AoP based on ultrasound images. (a) Schematic diagram of AoP that is measured transperineally as the angle between a line through the long axis of the PS and a second line from the inferior end of the PS tangentially to the contour of the FH. (b) A standard ultrasound image including the PS and the FH. (c) Regions of the PS (green) and the FH (red) are segmented and the endpoints of the PS are determined from the standard ultrasound image. (d) Based on the segmented FH, the contour of the FH is determined by fitting an ellipse equation. Then, the right tangent connected to the right endpoint of the PS is retained to calculate AoP.

(a) Angle of progression (AoP)

(b) A standard ultrasound image

(c) Segmentation and endpoint detection

(d) Tangent point determination