PT - JOURNAL ARTICLE AU - Kwee, Thomas C. AU - Takahara, Taro AU - Ochiai, Reiji AU - Koh, Dow-Mu AU - Ohno, Yoshiharu AU - Nakanishi, Katsuyuki AU - Niwa, Tetsu AU - Chenevert, Thomas L. AU - Luijten, Peter R. AU - Alavi, Abass TI - Complementary Roles of Whole-Body Diffusion-Weighted MRI and <sup>18</sup>F-FDG PET: The State of the Art and Potential Applications AID - 10.2967/jnumed.109.073908 DP - 2010 Oct 01 TA - Journal of Nuclear Medicine PG - 1549--1558 VI - 51 IP - 10 4099 - http://jnm.snmjournals.org/content/51/10/1549.short 4100 - http://jnm.snmjournals.org/content/51/10/1549.full SO - J Nucl Med2010 Oct 01; 51 AB - 18F-FDG PET is an established functional imaging modality for the evaluation of human disease. Diffusion-weighted MRI (DWI) is another rapidly evolving functional imaging modality that can be used to evaluate oncologic and nononcologic lesions throughout the body. The information provided by 18F-FDG PET and DWI can be complementary, because the 2 methods are based on completely different biophysical underpinnings. This article will describe the basic principles, clinical applications, and limitations of DWI. In addition, the available evidence that correlates and compares 18F-FDG PET and DWI will be reviewed.