PRECISION SELF-ALIGNING CT DETECTOR SENSORS

摘要

CT detector modules are disclosed that include a module frame and a plurality of tileable detector sensors positioned on the module frame. Each of the tileable detector sensors includes an array of detector elements and a mounting structure directly or indirectly coupled to the detector elements to provide for a mounting and alignment of the detector sensor to the module frame. The mounting structure includes an alignment plate positioned generally opposite the array of detector elements, with the alignment plate having alignment pins forming a datum structure to align the detector sensor on the module frame and one or more threaded bosses configured to receive a fastener therein that secures the detector sensor to the module frame. The module frame includes keyed features that receive the alignment pins when the detector sensors are mounted on the module frame, so as to align the detector sensors on the module frame.

主权项

1. A CT system comprising:
a rotatable gantry having an opening to receive an object to be scanned; an x-ray projection source positioned on the rotatable gantry that projects a beam of x-rays toward the object; and a plurality of detector modules positioned on the rotatable gantry and configured to receive x-rays attenuated by the object, each of the plurality of detector modules comprising:
a module frame having a top surface and side surfaces thereon; anda plurality of tileable detector sensors positioned on the top surface of the module frame so as to receive the x-rays attenuated by the object; wherein each of the plurality of tileable detector sensors comprises:
an array of detector elements configured to receive x-rays attenuated through the object and convert the x-rays into electrical signals; anda mounting structure directly or indirectly coupled to the array of detector elements and configured to provide for a mounting and alignment of the detector sensor to the module frame, the mounting structure comprising an alignment plate positioned on the detector sensor on a surface thereof generally opposite the array of detector elements, the alignment plate including:
alignment pins forming a datum structure to align the detector sensor on the module frame; andone or more threaded bosses configured to receive a fastener therein that secures the detector sensor to the module frame; wherein the module frame includes keyed features formed therein that receive the alignment pins of each respective detector sensor therein when the detector sensors are mounted on the module frame, so as to align the detector sensors on the module frame.