Fig. 1: Overview of the multi-view ultrasound system for diaphragm monitoring.

A Probes placement. Linear-array (green) and curvilinear (blue) probes were positioned at the intercostal space of the anterior axillary line and the anterior subcostal region through the acoustic window of the liver, respectively. The markers of the probes are consistent in the following figures. B Exploded view of the angle-free probes. The hinge connected the probe body (a) to the linear-array (b) or curvilinear transducer (c). C Diaphragm positioning and tracking algorithm. \(I\): Current B-mode images; \({M}_{0}\): Initial masks; \(C\): Confidence scores; \(\widehat{M}\): Segmentation mask; Memory features were represented by memory key \(k\) and value \(v\). D Diaphragm monitoring during normal respiration and cough, and algorithm for downstream task, e.g., cough strength estimation. \(f\): Features extracted from monitoring signals; \(t\): Task outputs.