Evaluation of internal target volume of abdominal tumors using cine-MRI.

Introduction: The detailed anatomy visualization with magnetic resonance (MR)-guided radiotherapy is particularly attractive for abdominal treatments, but patient respiratory motion can compromise image quality. The "navigator technique" produces high-quality 3D images, triggered by diaphragm displacement, in exhale phase only. The gold standard for planning is 4D imaging, which visualizes the lesion for all breathing phases.

ACPSEM position paper: the safety of magnetic resonance imaging linear accelerators.

Magnetic Resonance Imaging linear-accelerator (MRI-linac) equipment has recently been introduced to multiple centres in Australia and New Zealand. MRI equipment creates hazards for staff, patients and others in the MR environment; these hazards must be well understood, and risks managed by a system of environmental controls, written procedures and a trained workforce. While MRI-linac hazards are similar to the diagnostic paradigm, the equipment, workforce and environment are sufficiently different that additional safety guidance is warranted.