Ryohei Sasaki

About

Dr. Ryohei Sasaki is a leading expert in stereotactic body radiation therapy (SBRT), with a particular focus on real-time tumor motion tracking for thoracic and abdominal cancers. His research centers on optimizing the CyberKnife robotic radiosurgery system, specifically investigating the accuracy and uncertainties of fiducial marker-based tracking for moving targets like lung and liver tumors. Dr. Sasaki’s major contributions include a landmark 2019 study (11 citations) that retrospectively assessed single fiducial marker tracking for liver tumors, demonstrating the feasibility of this approach to reduce invasiveness while maintaining treatment precision. He further advanced the field by showing how fiducial marker position directly affects target volume definition in lung SBRT (2022, 5 citations), a critical insight for treatment planning. His comparative work on supine versus prone positioning for different lung tumor locations (2021) addresses a key limitation of the CyberKnife system’s fixed beam geometry. Through these studies, Dr. Sasaki has helped refine motion management strategies, improving the safety and efficacy of SBRT for patients with challenging tumor locations. His ongoing work continues to shape clinical protocols for robotic radiotherapy.

Research Focus

Key Achievements

Top Papers

1. 1
   Retrospective assessment of a single fiducial marker tracking regimen with robotic stereotactic body radiation therapy for liver tumours

   11 citations · 2019
2. 2
   Fiducial marker position affects target volume in stereotactic lung irradiation

   5 citations · 2022
3. 3
   A treatment planning study comparison between supine and prone position for different lung tumour locations using CyberKnife TPS

   2 citations · 2021

Key Collaborators

Contact & Links