Image-Guided Radiation Therapy at Rex Cancer Center
Sometimes tumors can move due to differences in organ filling or movements while breathing. Image-guided radiation therapy (IGRT) is a form of radiation that is guided by imaging equipment such as CT, ultrasound or stereoscopic X-rays.
Images are taken just before the patient is given the radiation treatment and then compared with images taken when the patient begins their treatment. The digital information is then transmitted to a console in the treatment room to allow doctors to compare the earlier image with the images taken just before treatment. During IGRT, images are "fused" to see if the treatment needs to be changed.
The high precision of IGRT allows for a reduction in the volume of healthy tissue that is affected, leading to fewer side effects and the potential to treat the tumor with more effective, higher doses of radiation.