| 主权项 |
1. A multi-modality imaging system comprising:
a nuclear medicine (NM) modality unit and a computed-tomography (CT) modality unit, the NM and CT modality units having respective field of views (FOVs) spaced apart from each other; and a positioning system comprising a pallet support and an imaging pallet, the imaging pallet having an elongated support body that includes a mounting portion and first and second portions extending along a longitudinal axis of the support body, the mounting portion being mounted to the pallet support, the first portion extending between the mounting portion and the second portion and being shaped for imaging within the FOV of the NM modality unit, the second portion being shaped for imaging within the FOV of the CT modality unit, the first and second portions being shaped differently than each other and having first and second lengths, respectively, the second length being greater than the first length, wherein the positioning system is configured to position the first portion of the imaging pallet within the FOV of the NM modality unit while the mounting portion is mounted onto the pallet support and configured to position the second portion of the imaging pallet within the FOV of the CT modality unit while the mounting portion remains mounted onto the pallet support, wherein the FOVs of the NM and CT modality units are aligned with each other along an examination axis, the positioning system moving the imaging pallet along the examination axis to position the imaging pallet, wherein the first portion is shaped for the NM modality unit and is configured such that attenuation to 140 keV gamma rays does not exceed 10%, and wherein the second portion is shaped for the CT modality unit and is configured such that attenuation to 120 kVp X-ray does not exceed 27%. |
