Publications by authors named "George S J Tudor"
Article Synopsis
- - This study aims to determine the safe planning margins (PRV) for protecting optic nerves during CyberKnife stereotactic radiosurgery (SRS) due to potential motion of the nerves during treatment.
- - MRI scans of healthy volunteers were used to assess optic nerve motion in various directions, leading to the calculation of two different PRV margins: a non-isotropic margin of 3mm in the left/right direction and an isotropic margin of 1mm when patients maintain a neutral gaze.
- - The findings suggest that incorporating these PRV margins in CyberKnife treatment plans is crucial to minimize risks to the optic nerves, particularly in patients with perioptic lesions like sphenoid wing meningiomas.
Background And Purpose: To measure the geometric uncertainty resulting from intra-fraction motion and intra-observer image matching, for patients having image-guided prostate radiotherapy on TomoTherapy.
Material And Methods: All patients had already been selected for prostate radiotherapy on TomoTherapy, with daily MV-CT imaging. The study involved performing an additional MV-CT image at the end of treatment, on 5 occasions during the course of 37 treatments.