Intensity-Modulated Radiation Therapy
Pronunciation: I-M-R-T
Also written as: IMRT — Intensity-Modulated Radiation Therapy
Advanced radiation delivery technique using varying beam intensities to create conformal dose distributions.
Full Definition
Intensity-Modulated Radiation Therapy is a sophisticated radiation treatment technique that uses computer-controlled linear accelerators to deliver precise radiation doses conforming to three-dimensional tumor shapes. IMRT allows for varying radiation intensity within individual treatment beams, enabling highly conformal dose distributions that minimize radiation exposure to surrounding normal tissues. This technique is particularly valuable for treating tumors near critical structures, allowing for dose escalation to improve tumor control while reducing treatment-related toxicity.
Usage
Usage note: Distinguish from related techniques like VMAT and stereotactic radiosurgery in clinical documentation.
In Context
- "IMRT planning achieved excellent target coverage while sparing the adjacent brainstem." — Treatment planning note
- "The patient completed IMRT without significant acute toxicity to critical structures." — Treatment summary