Comparison between the Prebolus T1 Measurement and the Fixed T1 Value in Dynamic Contrast-Enhanced MR Imaging for the Differentiation of True Progression from Pseudoprogression in Glioblastoma Treated with Concurrent Radiation Therapy and Temozolomide Chemotherapy ======================================================================================================================================================================================================================================================================== * J.G. Nam * K.M. Kang * S.H. Choi * W.H. Lim * R.-E. Yoo * J.-H. Kim * T.J. Yun * C.-H. Sohn