Article 1 Brain Neoplasms 1 EPIK 1 Echo-Planar Imaging 1 Humans 1 Image Processing, Computer-Assisted 1 MR-PET 1 Multimodal Imaging 1 Perfusion Imaging 1 Positron-Emission Tomography 1 adult 1 body weight 1 brain tumor 1 clinical article 1 comparative study 1 controlled study 1 diagnostic imaging 1 echo planar imaging 1 fluoroethyl tyrosine f 18 1 gadoterate meglumine 1 gadoteric acid 1 gradient echo/spin echo 1 human 1 image analysis 1 image distortion 1 image processing 1 image reconstruction 1 mean transit time multi-contrast 1 multimodal imaging 1