Gynae BT 2017

Motion and dose – primary target

 Jadon et al. A systematic review of organ motion and image-guided strategies in external beam radiotherapy for cervical cancer. Clin Oncol (R Coll Radiol). 2014 Apr;26(4):185-96

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39 relevant studies

 Patient specific motion: 5-40mm

 Population based margins would be large (up to 40mm)

 Most studies evaluate geometry  Few studies evaluate coverage (e.g. V95%)  1 study evaluates dosimetric impact (D98)

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