Dr. Vishwas Kaushik is a qualified medical professional holding an MBBS from the prestigious Belgorod State University, Russia, with a strong foundation in clinical medicine and healthcare practice. His comprehensive medical training has equipped him with a profound understanding of evidence-based clinical practices, patient-centered care, and the evolving landscape of modern medicine. With a keen interest in medical research and scientific communication, he consistently translates complex clinical concepts into clear, accurate, and accessible content for diverse audiences. His work reflects a deep commitment to advancing medical knowledge, delivering impactful healthcare insights, and bridging the gap between clinical expertise and accessible medical communication.

Reviewer

Dr Prateek Varshney

Surgical Oncologist

15 Years of Experience

Last Reviewed - June 2026

Dr. Prateek Varshney is a renowned Surgical Oncologist. He has experience of more than 15+ years in surgical Oncology. He is currently practicing as a consultant at Metro Mass Hospital and Cancer Institute. He was also previously associated as a consultant with Sir Ganga Ram Hospital and as a professor at Gujarat Cancer Research Institute.

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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:

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.

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