Multi-plane x-ray imaging system and method
Imaging systems having multiple radiation sources, such as x-ray sources, and multiple radiation detectors, such as flat-panel x-ray detectors and/or diagnostic-quality CT detectors, housed within an imaging gantry, for obtaining simultaneous images of an object positioned within a bore of the gantry in multiple imaging planes.
1. A method of imaging an object, comprising:
positioning an object with an imaging bore of an O-shaped imaging gantry having at least one x-ray radiation source and at least two x-ray radiation detectors secured to a rotor that is rotatable within the gantry; and
obtaining simultaneous images of the object in multiple imaging planes, wherein obtaining the simultaneous images comprises:
directing x-ray radiation beams from the at least one x-ray radiation source through a common isocenter within the bore; and
detecting the x-ray radiation beams attenuated by an object within the bore at the at least two x-ray radiation detectors such that during a first time period, a first x-ray radiation detector is exposed to attenuated x-ray radiation from the object while a second x-ray radiation detector is not exposed to x-ray radiation and reads out imaging data collected during a previous exposure to attenuated x-ray radiation from the object, and during a second time period, the first x-ray radiation detector is not exposed to x-ray radiation and reads out imaging data collected during the first time period while the second x-ray radiation detector is exposed to attenuated x-ray radiation from the object, and the first time period and the second time period are each 0.1-100 milliseconds in duration.
2. The method of claim 1 , wherein the object comprises a human or animal patient.
3. The method of claim 1 , further comprising:
displaying bi-planar imaging data from the at least two detectors in real time.
4. The method of claim 1 , further comprising:
reconstructing image data collected by at least one detector to provide a 3D tomographic image.
5. The method of claim 1 , wherein directing x-ray radiation comprises directing x-ray radiation from at least two x-ray radiation sources, wherein each source is positioned opposite an x-ray radiation detector on the gantry.
6. The method of claim 1 , further comprising:
providing high-voltage power to the at least one source using a high-voltage generator within the gantry.
7. The method of claim 6 , wherein providing high-voltage power comprises providing pulses of high-voltage power to a plurality of x-ray radiation sources in succession.
8. The method of claim 6 , wherein providing high-voltage power comprises providing pulses of high-voltage power to at least one x-ray radiation source during fluoroscopy and continuous high-voltage power to at least one x-ray radiation source during CT scanning.
9. The method of claim 1 , further comprising:
rotating the at least one source and the at least two detectors around the gantry while obtaining images of the object.
10. The method of claim 9 , wherein the at least one source and the at least two detectors are rotated around the gantry while at least one detector obtains images to provide a 3D CT scan.
11. The method of claim 10 , wherein the 3D CT scan comprises single plane and/or bi-plane “cone beam” circular or helical scanning using one or more flat panel detectors.
12. The method of claim 10 , further comprising:
translating the gantry relative to the object being imaged to provide a helical CT scan.
13. The method of claim 1 , further comprising:
transmitting imaging data wirelessly from the gantry to an entity off the gantry.
14. The method of claim 1 , wherein the object is a patient and the method further comprises:
translating the gantry relative to the patient to provide an arterial roadmap image of the patient.
15. The method of claim 14 , wherein the arterial roadmap image is either single plane or bi-plane fluoroscopy roadmap image of a patient.
16. The method of claim 14 , further comprising:
determining a velocity of translation of the gantry along a patient axis based on an image analysis of flow of contrast agent in an artery of the patient; and
translating the gantry at the determined velocity.
17. The method of claim 1 , wherein the first period and the second period together form a cycle, and the cycle is continuously repeated during the imaging.
18. The method of claim 1 , wherein the at least one x-ray radiation source comprises an x-ray tube and the at least two x-ray radiation detectors comprise at least one of a flat panel detector and a diagnostic-quality x-ray CT detector.
19. The method of claim 18 , wherein the at least two detectors comprise flat panel detectors that are spaced 90° apart on the rotor.
20. The method of claim 1 , wherein the imaging gantry is secured to a mobile base, the method further comprising:
translating the gantry with respect to the base in an imaging mode; and
translating the base and gantry together in a transport mode.
21. The method of claim 1 , wherein the first time period and the second time period are each 5-30 milliseconds in duration.