Patent ID: 8401613

Claim:
A Positron Emission Tomography (PET)-Magnetic Resonance Imaging (MRI) combination apparatus, comprising: an MRI bore configured to capture an MR image of an object which moves into an imaging space; a PET detector installed inside the imaging space of the MRI bore, and configured such that a plurality of scintillation crystal arrays, each having a plurality of scintillation crystals arranged in a ring shape, is arranged in a longitudinal direction so as to extend a axial field of view (FOV); a PET circuit unit installed outside the MRI bore to prevent the PET circuit unit from being influenced by a magnetic field produced in the MRI bore, and configured to include therein a signal amplification circuit and a signal processing circuit; and a cable configured to connect the PET detector to the PET circuit unit, wherein the PET detector comprises photo sensor, and the signal amplification circuit comprises pre-amplifier and shaping amplifier, and the cable is a multi-channel cable that is connected from the photo sensor to the signal amplification circuit, and is configured to transmit charge signals to the signal amplification circuit and further transmits voltage and bias signals to the PET detector, and has a high-characteristic impedance and wherein the cable has a length from 5 cm to 500 cm so as to prevent performance of PET and MRI imaging from being deteriorated.