Radiation fibrosis: Differentiation from recurrent tumor by MR imaging. Work in progress

H. S. Glazer, J. K.T. Lee, R. G. Levitt, J. P. Heiken, D. Ling, W. G. Totty, D. M. Balfe, B. Emani, T. H. Wasserman, W. A. Murphy

Research output: Contribution to journalArticlepeer-review

180 Scopus citations


Magnetic resonance (MR) images of 21 patients who had undergone radiation therapy were analyzed and compared with those of 15 patients who had untreated tumors. T2-weighted images (TR = 1,500 msec, TE = 90 msec) were most helpful in distinguishing recurrent tumor from radiation fibrosis. Radiation fibrosis, like muscle, usually remained low in signal intensity on T2-weighted images, while tumor demonstrated higher signal intensity. In no patient was the signal intensity of tumor the same or less than muscle on the T2-weighted images. However, relatively high signal intensity on T2-weighted images is not specific for tumor recurrence and may be seen in acute radiation pneumonitis, infection, hemorrhage, and even pulmonary radiation fibrosis.

Original languageEnglish (US)
Pages (from-to)721-726
Number of pages6
Issue number3
StatePublished - Jan 1 1985

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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