Development of an isocentric rotating chair positioner to treat patients of head and neck cancer at upright seated position with multiple nonplanar fields in a fixed carbon‐ion beamline

Abstract

The chair achieved the required clinical tolerance for the clinical application. The tilt angle was limited to within 5 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow><mml:msup><mml:mrow></mml:mrow> <mml:mo>∘</mml:mo></mml:msup> </mml:mrow> </mml:math> to treat patients through a specific treatment workflow with a proper daily quality assurance program during a clinical trial, started in May 2019. An integration validation with a 20 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow><mml:msup><mml:mrow></mml:mrow> <mml:mo>∘</mml:mo></mml:msup> </mml:mrow> </mml:math> tilt will be conducted in the near future to realize the full potential of the isocentric rotating chair.