Fig. 2.

a, b & c. Change in DWI over treatment for prediction of CRT response. ADC maps of a hypopharyngeal SCC (arrows) with local failure; a Pre-treatment, b two weeks intra-treatment, c 6 weeks post-treatment. The ADC shows the expected initial early rise in ADC but there is a later fall in ADC (believed to be due to repopulation of tumour cells). {Image reproduced from: King AD, Mo FK, Yu KH, et al. (2010) Squamous cell carcinoma of the head and neck: diffusion-weighted MR imaging for prediction and monitoring of treatment response. Eur Radiol 20:2213-20.}