MAYO CLINIC - Transrectal ultrasound probe sensor sleeve

As a clinical engineer at Mayo Clinic’s Anatomic Modeling Unit and in collaborated with Chris Deufel, a physicist in Radiation Oncology, I designed the mechanical sensor mounts to retrofit a commercial probe and stepper. Particular attention was paid in detail design stages to develop features that could reliably and precisely align the probe and sensors.

Biocompatible, 3D-printed transrectal ultrasound (TRUS) sleeve engineered for compatibility with a commercially available probe and stepper to support clinical translation. The sleeve incorporates channels for EM sensors and snap-on mounting features to ensure reproducible positioning relative to the probe.

“EM-tracked needle reconstruction showed close agreement with manual, image-based reconstruction, yielding median (interquartile range) errors of 0.60 (0.28–0.78) mm for needle depths and 0.64 (0.40–0.93) mm for needle shafts. Sleeve mounting reproducibility had 90% confidence intervals whose absolute bounds were below 0.17 mm (3D offset), 0.09° (pitch), 0.06° (yaw), and 0.51° (roll). A patient-specific calibration procedure was developed to correct potential variability in 3D printing and sensor placement. The potential net reduction in procedure time using EM-based reconstruction versus manual reconstruction was approximately 28 minutes.”

https://www.sciencedirect.com/science/article/pii/S1538472126000449?dgcid=coauthor