AMA CPT® Assistant - 2009 Issue 11 (November)

Intensity Modulated Radiation Therapy (IMRT): CPT Codes 77301, 77418, 77338 (November 2009)

November 2009 pages 3-5 Intensity Modulated Radiation Therapy (IMRT): CPT Codes 77301, 77418, 77338 Intensity Modulated Radiation Therapy (IMRT) is a technology for delivering highly conformal external beam radiation to solid tumors. When the treatment volume "conforms" to the shape of the tumor, the relative toxicity of radiation to the surrounding normal tissues is reduced, allowing a higher dose of radiation to be delivered to the tumor than conventional techniques would allow. IMRT results in more conformal target coverage and normal tissue sparing than three-dimensional (3-D) conformal radiotherapy. IMRT is particularly useful for obtaining the highly conformal dose distributions...

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