摘要:
An x-ray imaging system according to the present invention comprising a stepped scanning-beam x-ray source (10) and a multi-detector array (110). The output of the multi-detector array is input to an image reconstruction engine which combines the outputs of the multi-detectors over selected steps of the x-ray beam to generate an x-ray image of the object (80). A collimating element (90), preferably in the form of a perforated grid containing an array of apertures (140), interposed between the x-ray source (10) and an object (80) to the x-rayed. A multi-detector array assembly (110) comprising alignment components. A maneuverable positioner incorporating an x-ray sensitive marker allowing the determination of the precise position coordinates of the maneuverable positioner.
摘要:
A catheter (10) comprises an elongated body (12) having a distal end (14) adapted to be inserted into a body cavity, vessel, tract, or the like and a proximate end (16) available to a person performing a medical procedure. The catheter (10) includes at least one lumen (18) running therethrough. An optical fiber (24) is disposed in the at least one lumen (18) and extends from the distal end (14) to the proximate (16) thereof. An x-ray sensitive phosphor material (26) is disposed at the tip (28) of the end of the optical fiber (24) positioned at the distal end (14) of the catheter (10) and the end (28) of the optical fiber at the proximate end (16) of the catheter (10) is coupled to a photodetector (32).
摘要:
An x-ray detector (60), useful in x-ray imaging systems comprising a plurality of detector elements (608) comprising a plurality of detector sub-elements (612). A plurality of X-ray detectors (608) are arranged in a multi-dimensional array (604), each array of detectors tiered (310) with respect to the next array of detectors. A compact electronics circuitry (800) is contained in each of the plurality of detector sub-elements (608). The compact electronics circuitry comprises a photon sensor (804), an amplifier (808), a discriminator (812) and an analog-to-digital converter (824). Finally, a method for generating X-ray transmissiveness information is also provided.
摘要:
A scanning beam digital x-ray imaging system according to the present invention includes an x-ray tube (10) having an electron beam source (161) and a target anode (50). Circuitry is provided for focussing the beam (164) and scanning the beam (20, 30) across the target anode (50) in a predetermined pattern such as a serpentine scan pattern. A collimating element (90), preferably in the form of a perforated grid containing an array of apertures (140), is interposed between the x-ray source (50) and an object to be x-rayed (80). The apertures (140) are oriented to form x-ray beams (100) converging at a detector array (110) on a plane (270) located a selected distance from the collimating element (90). That distance is selected to allow placing the object to be x-rayed (80) in between the collimating element (90) and the detector array (110). A segmented x-ray detector array (110) containing a rectangular matrix of detector elements (170) is located in the detection plane (270). A focal plane (280) is created which gives optimal resolution at a particular, selectable distance from the x-ray source (50).