Intensity-modulated radiotherapy (IMRT): Symptoms, Classification, Diagnosis & Recovery

Intensity-modulated radiation therapy (IMRT) stands as an advanced form of radiation therapy in cancer treatment. By utilizing potent energy beams—derived from X-rays, protons, or alternative sources—IMRT precisely targets cancer cells, sparing healthy tissue.

IMRT employs customized radiation beams, meticulously tailored to match the contours of the cancerous area. These beams possess the flexibility to move along arcs during treatment delivery, allowing for optimal coverage. Additionally, the intensity of each beam can be finely adjusted, ensuring accurate radiation dosage.

This technique enables the safe and efficient delivery of radiation therapy, minimizing damage to surrounding healthy tissues. IMRT's versatility extends to the treatment of both cancerous and benign tumors across various body regions, with the primary objective being to administer the appropriate radiation dose to the target while mitigating collateral damage.

The following types of cancer can be treated by IMRT:

• Breast cancer
• Cervical cancer
• Colon cancer
• Lung cancer
• Prostate cancer
• Stomach cancer
• Uterine cancer
• Other cancer types

Types:

• Step-and-Shoot IMRT:( the treatment is delivered in a series of small, discrete steps.)
• Sliding Window IMRT:(known as dynamic MLC,) This involves continuously moving the MLC leaves while the radiation beam is on, allowing for a more seamless delivery of radiation dose.
• Volumetric Modulated Arc Therapy (VMAT):(This is an advanced form of IMRT where the linac delivers radiation continuously as it rotates around the patient.)
• Tomotherapy:(This technique combines IMRT with computed tomography (CT) scanning.)It delivers radiation in a helical manner.

Following are the signs and symptoms associated with IMRT:

• General Side Effects Fatigue, Skin Changes, Hair loss
• Dry Mouth (Xerostomia), Difficulty Swallowing (Dysphagia)
• Cough, Shortness of Breath, Abdomen and Pelvis
• Cognitive changes such as difficulty