IMRT is a type of 3-dimensional radiation therapy that uses computer-generated images to show the size and shape of the tumor. Thin beams of radiation of different intensities are aimed at the tumor from many angles. This type of radiation therapy reduces the damage to healthy tissue near the tumor.

• Divides each treatment field into multiple segments (up to 500 per angle)
• Allows dose escalation to most aggressive tumor cells; best protection of healthy tissue
• Modulates radiation intensity, gives distinct dose to each segment
• Uses multiple beam angles, thousands of segments
• Requires inverse treatment planning software to calculate dose distribution