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IGRT — Image-Guided Radiotherapy.

Imaging at the treatment machine, before each session, confirms the target is exactly where the plan expects — correcting for the small day-to-day shifts in the body's anatomy.

A precise plan is only as good as the set-up that delivers it. IGRT is the verification step that makes high-precision radiation trustworthy day after day.

What it is

Before (and sometimes during) treatment, imaging is taken on the treatment machine and compared with the plan. If the anatomy has shifted — as it naturally does from day to day — the position is corrected before the beam is switched on.

Why it matters

  • Lets margins be kept tight, sparing healthy tissue
  • Essential to dose-escalated and stereotactic treatments
  • Accounts for organ movement, weight change, and set-up variation

What to expect

IGRT is not a separate course of treatment — it is the precision layer applied within IMRT, SBRT, SRS and other techniques, adding only moments to each session.

Questions patients ask

What does image-guided radiotherapy actually mean?

Before each session, imaging at the treatment machine confirms the target is exactly where the plan expects, and the position is corrected if it has shifted.

Why is imaging needed every day?

Organs move slightly from day to day with breathing, bladder filling and bowel gas. Daily imaging means the dose lands where it was planned rather than where it was assumed.

Does the extra imaging add much radiation?

The imaging dose is small and is accounted for in the plan. The accuracy it buys outweighs it.

Which cancers benefit most from IGRT?

Prostate, lung, liver and any site close to a critical structure, where a few millimetres genuinely matter.

General information, not a substitute for a consultation. Your plan depends on your reports, stage and general health — discuss your case with Dr. Bhatnagar.

Discuss your case with Dr. Bhatnagar.

Bring your reports and scans for a consultation — he will tell you plainly whether radiation has a role.

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