@article {Komiyama65, author = {M Komiyama and H Yagura and M Baba and T Yasui and A Hakuba and S Nishimura and Y Inoue}, title = {MR imaging: possibility of tissue characterization of brain tumors using T1 and T2 values.}, volume = {8}, number = {1}, pages = {65--70}, year = {1987}, publisher = {American Journal of Neuroradiology}, abstract = {To evaluate the usefulness of T1 and T2 values for tissue characterization of brain tumors, 37 histologically confirmed brain tumors were examined with a 0.5-T superconductive MR system. With spin-echo and inversion-recovery imaging sequences, computed T1 and T2 images were reconstructed, and T1 and T2 values of the tumors were calculated. Relaxation rates (1/T1 and 1/T2), T1/T2 ratios, and malignancy indexes, which were originally designed for gastrointestinal tumors, were also calculated. Values of all these parameters were so wide-ranged that it was impossible to characterize the tumor tissue types.}, issn = {0195-6108}, URL = {https://www.ajnr.org/content/8/1/65}, eprint = {https://www.ajnr.org/content/8/1/65.full.pdf}, journal = {American Journal of Neuroradiology} }