What is Intensity-Modulated Radiation Therapy (IMRT)?

Mar 19, 2025 Source: Cainiu Health
Dr. Yang Ziqi
Introduction
In general, IMRT refers to Intensity-Modulated Radiation Therapy. IMRT is an advanced radiation therapy technique. Traditional radiation therapy uses radiation beams of fixed shape and intensity to irradiate tumors. In contrast, IMRT employs computer-controlled multileaf collimators and other equipment to adjust the radiation beam's intensity and shape according to the tumor's geometry, size, and the varying radiation sensitivity of different regions within the tumor.

Generally speaking, IMRT refers to intensity-modulated radiation therapy. Intensity-modulated radiation therapy is an advanced radiation treatment technique that uses computer-controlled linear accelerators to precisely deliver radiation doses to tumors while minimizing damage to surrounding healthy tissues. A detailed analysis is as follows:

  

Traditional radiation therapy uses radiation beams with fixed shapes and intensities to irradiate tumors. In contrast, intensity-modulated radiation therapy utilizes equipment such as computer-controlled multileaf collimators to precisely adjust the intensity of radiation beams at different locations and directions according to the shape and size of the tumor and the varying sensitivity of different regions within the tumor to radiation. This allows for a more uniform distribution of radiation doses within the tumor tissue while minimizing radiation exposure to surrounding normal tissues, thereby improving local tumor control rates and reducing complication rates in normal tissues.

Intensity-modulated radiation therapy is suitable for various types of tumors, including brain tumors, lung cancer, breast cancer, prostate cancer, and others. It can improve the prognosis for cancer patients while also reducing complication rates, thus enhancing quality of life. During intensity-modulated radiation therapy, possible side effects may include skin reactions, fatigue, and reduced appetite.

During IMRT treatment, patients should follow their doctor's instructions and undergo regular follow-up examinations to monitor treatment effectiveness and side effects. Additionally, patients should maintain healthy lifestyle habits and balanced nutrition to enhance immune system function.