SYSTEMS AND METHODS FOR X-RAY TOMOGRAPHY HAVING RETROGRADE FOCAL POSITIONING

摘要

A tomography apparatus includes a multi-focal point x-ray source, a support to travel a trajectory path, a detector having a plurality of pixels, where one of the multi-focal point x-ray source, the detector, and an item-under-test move on the support. A control processor controls a change in the focal point of the x-ray source at discrete points, or continuously, within a measurement region, the focal point change in a direction retrograde to the support arm travel, a detector memory accumulates a digital value representative of a signal charge from at least a portion of the plurality of pixels, the control processor reconstructs a volumetric image of the item-under-test by processing the detector memory contents. A method for continuous tomosynthesis and a computer-readable medium are also disclosed.

主权项

1. A tomography apparatus comprising:
a multi-focal point x-ray source; a support for the source configured to travel a pre-determined trajectory path; a detector having a plurality of pixels, at least one of the multi-focal point x-ray source, the detector, and an item-under-test mounted on the support to move relative to one another; a control processor configured to execute computer-readable instructions that cause the control processor to change the focal point of the x-ray source at one of discrete points and continuously within a measurement region, the focal point change in a direction retrograde to the support arm travel along the trajectory path; a detector memory configured to accumulate a digital value representative of a signal charge from at least a portion of the plurality of pixels exposed to a portion of the x-ray beam; the control processor configured to reconstruct a volumetric image of the item-under-test by processing contents of the detector memory with a reconstruction process function.