There is provided a PET-MRI
hybrid apparatus and method for integrating a PET image and an
MRI image so that anatomical, hemodynamical and molecular information on human tissues are simultaneously presented in a
single image. The PET-MRI
hybrid system comprises a first
scanner for obtaining anatomical and hemodynamical information, and a second
scanner for obtaining molecular and functional information on the human tissues. Along a path between the first
scanner and the second scanner, a transferring
railway system which includes runs, and a movable
bed for supporting a subject installed on the railway. The PET-MRI
hybrid system also comprises a “RF+ magnetic” shield and a “magnetic” shield between path between the first scanner and the second scanner, which switch between an open status and a close status in a completely synchronized manner to assure a complete
magnetic shield for the PET
system at any given time. The subject is fastened on the
bed and transferred along the railway between the first and second scanner to provide accurately fused MRI and PET images.