2017_IGRT course book

Conclusions

• Intra-fraction movement in a mask is about 0.2 - 0.3 mm, registration accuracy comparable

• With automatic couch shift, the accuracy of IGRT is extremely high

• Rotational errors have a negligible effect for CTV coverage in most cases

• Cone-beam CT guidance of stereotactic treatments achieves comparable results to methods based on invasive frames

• Post treatment scan important to validate workflow