Medical Physicist's Notes · TruPose™ Head Adjuster
Each card opens a focused post on running TruPose inside a bore-class linac SRS programme — how big a 1° residual rotation actually looks at the planning target, where TruPose fits the SGRT-driven workflow, and what an AAPM TG-147 / TG-275 QA programme has to verify when a head adjuster joins the room.
TruPose™ Head Adjuster
Posts in this section. New ones land here as they're added.
Bore-class linacs (Halcyon, Ethos, Radixact) have 4DoF couches — translations plus a single rotation. SGRT reports the residual pitch/roll/yaw deltas. Without a robotic couch, how big does a 1° residual rotation actually look in the dose distribution for a 1.5 cm intracranial target, and where does TruPose plug into the workflow? Sourced to Dhabaan 2012 (4DoF vs 6DoF dose impact) + Liu 2015 (motion-correction tolerances).
Read this SRS upgrade pathA clinic with a standard radiotherapy positioning board wants to deliver single-iso multi-met VMAT-SRS. At 1°, 7 % of targets drop below D95 95 % (Roper 2015); at 2°, only 63 % retain coverage. Three upgrade paths exist — robotic couch, head frame, or TruPose + open-face mask + SGRT. Which is right for a bore-class linac? Sourced to Roper 2015, Selvan 2019, Han 2022, Dhabaan 2012 and AAPM TG-147.
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