SUPER-RESOLUTION TOMOSYNTHESIS IMAGING SYSTEMS AND METHODS

摘要

Tomosynthesis imaging methods, systems, and apparatus are disclosed. The systems may include a source to emit penetrating particles toward an object, a detector to acquire a series of projection images responsive to the penetrating particles, and a positioning system to position the source relative to the object and the detector. An imaging system controls the positioning apparatus, source, and detector to acquire images along a primary scan direction with offsets in a secondary scan direction. An oscillatory motion may be applied to the source to reduce focal spot blur. Tomographic volumes are constructed that are capable of exhibiting super-resolution from data representing the acquired series of projection images taking the primary scan direction and the offsets into consideration.

主权项

1. A super-resolution digital tomosynthesis system for imaging an object, the system comprising:
at least one source configured to emit penetrating particles toward an object; at least one detector comprising an array of pixels configured to acquire a series of projection images of the object in response to the penetrating particles from the at least one source; positioning apparatus configured to position the at least one source relative to the object and the detector; and an imaging system coupled to the at least one source, the at least one detector, and the positioning apparatus, the imaging system configured to:
control the positioning apparatus to position the at least one source relative to the object and the at least one detector along a primary scan direction and to introduce at least one offset along a secondary scan direction, at least one offset being a non-integer multiple of a pixel dimension within the array of pixels;control the at least one source and the at least one detector to acquire the series of projection images along the primary scan direction with the introduced at least one offset; andconstruct a tomographic volume capable of exhibiting super-resolution from data representing the acquired series of projection images taking the primary scan direction and the at least one offset into consideration.