Assessing the Ompact of Neutral Pelvic Positioning on Bone Repositioning Quality in Pelvic Radiotherapy Patients

Condition(s) studied

Investigational drug(s) / intervention(s)

Setup with neutral pelvic positioning technique: Setup with neutral pelvic positioning technique (from dosimetry onward and at each session) and daily IGRT (CBCT or MVCT Mega Voltage Computed Tomography)

Standard setup: Standard setup (from dosimetry onward and at each session) and daily IGRT (CBCT or MVCT)

Study summary

This study explores whether achieving a neutral pelvic position improves bone repositioning quality for patients undergoing pelvic radiotherapy. While Intensity-Modulated Radiotherapy (IMRT) and Image-Guided Radiotherapy (IGRT) have enhanced target volume precision and reduced side effects, effective patient positioning remains crucial. However, rotational adjustments are limited without a specialized robotic table. Current immobilization devices, customizable or not, show limited impact on positioning accuracy, with mixed results on the use of knee and foot supports. A pilot study identified significant rotational variation, and to address this, a "glute bridge" maneuver is proposed to ensure a neutral pelvic position. This randomized study will evaluate the impact of this maneuver on positioning quality when combined with immobilization and skin markers.

Eligibility

Primary outcome measure(s)

• The rate of images with RX > 3° will be calculated for each patient as the number of sessions with a repositioning image where RX is > 3°, relative to the total number of sessions performed. — At to 3 months

Trial sites (4)

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