  The 6G standard aims to be an integral part of the future economy by
providing high-performance communication and sensing services. At terahertz
(THz) frequencies, indoor campus networks can offer the highest sensing
quality. Health monitoring in hospitals is expected to be an application site
for these. This work outlines a monostatic phase-based system for breathing
rate monitoring. Our feasibility study observes motion measurement accuracy
down to the micrometer level. However, we also find that the patient's pose
needs to be considered for generalized applicability. Thus, a solution that
leverages multiple propagation paths and beam orientations is proposed.
