Tristan K. Gaddis, PhD

Single-isocenter SBRT enables efficient treatment of multiple liver metastases but limits mitigation of rotational error. This study evaluates rotational uncertainty effects on target coverage in single-isocenter liver SBRT for patients with 5+ metastases.

Surface-guided radiation therapy (SGRT) uses external surface motion as a surrogate for internal target position. While strict SGRT tolerances (typically ±1mm) are common, they may still be permissive for patients with small surface excursions. In these cases...

End-expiration breath hold (EEBH) is commonly employed in GI radiotherapy to enable dose escalation while minimizing dose spillage to adjacent organs at risk. Surface-tracking systems are frequently used to support patient breath-hold stability. This study co...