Method and apparatus for generating computed tomography images with offset detector geometries
First Claim
1. A method of generating an image of an object using an imaging apparatus having a detector, comprising the steps of:
- providing a first gimbal frame;
providing a second gimbal frame, wherein the first gimbal frame and second gimbal frame are rotatably connected to one another;
providing an x-ray radiation source mounted to the first gimbal frame;
providing an x-ray radiation detector mounted to the first gimbal frame;
providing at least a pair of SPECT gamma cameras mounted to the first gimbal frame;
gathering a first imaging data regarding the object with the detector offset from a center of rotation in a first offset position;
shifting the detector to a second position which is offset from the center of rotation, wherein the second offset position is different from the first offset position;
gathering a second imaging data regarding the object with the detector in the second offset position; and
using the first imaging data and the second imaging data to reconstruct an image of the object.
1 Assignment
0 Petitions
Accused Products
Abstract
In accordance with one aspect of the invention a method and apparatus for generating complete scout scans with CT imaging devices having offset detector geometries is provided. In accordance with another aspect of the invention, a method and apparatus for increasing the reconstructable field of view for CT imaging devices having offset detector geometries is provided. In accordance with another aspect of the invention, a method and apparatus for image reconstruction for region of interest and full-body imaging with CT imaging devices having offset detector geometries is provided. In accordance with another aspect of the invention, a combined x-ray and SPECT imaging system is provided.
-
Citations
33 Claims
-
1. A method of generating an image of an object using an imaging apparatus having a detector, comprising the steps of:
-
providing a first gimbal frame; providing a second gimbal frame, wherein the first gimbal frame and second gimbal frame are rotatably connected to one another; providing an x-ray radiation source mounted to the first gimbal frame; providing an x-ray radiation detector mounted to the first gimbal frame; providing at least a pair of SPECT gamma cameras mounted to the first gimbal frame; gathering a first imaging data regarding the object with the detector offset from a center of rotation in a first offset position; shifting the detector to a second position which is offset from the center of rotation, wherein the second offset position is different from the first offset position; gathering a second imaging data regarding the object with the detector in the second offset position; and using the first imaging data and the second imaging data to reconstruct an image of the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23)
-
-
14. A combined x-ray and SPECT imaging system comprising;
-
a first gimbal frame; a second gimbal frame, wherein the first gimbal frame and second gimbal frame are rotatably connected to one another; an x-ray radiation source mounted to the first gimbal frame; an x-ray radiation detector mounted to the first gimbal frame; and at least a pair of SPECT gamma cameras mounted to the first gimbal frame. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 24, 25)
-
-
26. A method of generating an image of an object using an imaging apparatus having a detector, comprising the steps of:
-
gathering a first imaging data regarding the object with the detector offset from a center of rotation in a first offset position, wherein the detector spans approximately a first half of the width of the object in the first offset position; shifting the detector to a second position which is offset from the center of rotation, wherein the second offset position is different from the first offset position, during an imaging acquisition such that the detector is in the second offset position at the conclusion of the imaging acquisition; gathering a second imaging data regarding the object with the detector in the second offset position, wherein the second offset position spans generally a remaining half of the width of the object that was not spanned by the detector in the first offset position; gathering third imaging data regarding the object during the imaging acquisition with the detector in a plurality of intermediate positions between the first offset position and the second offset position; and reconstructing the first, second and third imaging data to generate a reconstructed image of the object. - View Dependent Claims (27, 28, 29)
-
-
30. A medical imaging apparatus adapted to generate an image of an object, comprising:
-
a radiation source; a detector which detects radiation emitted by the source; wherein the medical imaging apparatus is adapted to gather a first imaging data regarding the object with the detector offset from a center of rotation in a first offset position, wherein the detector spans approximately a first half of the width of the object in the first offset position; wherein the medical imaging apparatus is adapted to shift the detector to a second position which is offset from the center of rotation, wherein the second offset position is different from the first offset position, during an imaging acquisition such that the detector is in the second offset position at the conclusion of the imaging acquisition; wherein the medical imaging apparatus is adapted to gather a second imaging data regarding the object with the detector in the second offset position, wherein the second offset position spans generally a remaining half of the width of the object that was not spanned by the detector in the first offset position; wherein the medical imaging apparatus is adapted to gather third imaging data regarding the object during the imaging acquisition with the detector in a plurality of intermediate positions between the first offset position and the second offset position; and wherein the medical imaging apparatus is adapted to reconstruct the first, second and third imaging data to generate a reconstructed image of the object. - View Dependent Claims (31, 32, 33)
-
Specification