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US 8,265,224 B2Granted
System for adjusting angiographic X-ray imaging parameters based on image content
AssigneeSiemens Medical Solutions USA, Inc.
InventorJohn Baumgart
Life of this patent
Estimating the term…
Abstract
An Angiographic X-ray imaging system includes a detector for automatically detecting a transition between different phases of contrast enhanced blood flow in vessels of a portion of patient anatomy, in response to pixel luminance content of at least one image of a sequence of acquired images of the portion of patient anatomy. An X-ray imaging device uses the detector and information associating different sets of X-ray imaging device settings with corresponding different phases of contrast enhanced blood flow in vessels for automatically sequentially acquiring images in different phases using different imaging settings, in response to detection of transitions between different phases.
Claims21
An Angiographic X-ray imaging system, comprising:
- a detector for,
- automatically detecting a peak in contrast agent enhanced blood flow and a transition between different phases of contrast agent enhanced blood flow in vessels of a portion of patient anatomy, in response to pixel luminance content of at least one image of a sequence of acquired images of the portion of patient anatomy;
- automatically detecting a transition between different states of operation of an invasive instrument in a portion of patient anatomy, in response to a transition in pixel luminance content of at least one image of said sequence of acquired images of the portion of patient anatomy;
- a repository of information associating a plurality of different sets of X-ray imaging device settings with a corresponding plurality of different phases of contrast agent enhanced blood flow in vessels including a first set of settings associated with a first phase and a different second set of settings associated with a different second phase, an individual set of X-ray imaging device settings including an X-ray radiation exposure pulse width and at least one of,
- (a) a radiation dose setting and
- (b) an image acquisition frame rate;
- and
- an X-ray imaging device for using said detector and said information for automatically adaptively acquiring a sequence of images of said portion of patient anatomy including said invasive instrument in a particular state by sequentially acquiring at least one image in said first phase using said first set of settings and at least one image in said second phase using said second set of settings, in response to detection of a transition between the first and second phases.
5 more elements
An Angiographic X-ray imaging system, comprising:
- a detector for,
- automatically detecting a peak in contrast agent enhanced blood flow and a phase following the detected peak in contrast agent flow and a transition between different states of operation of an invasive instrument in a portion of patient anatomy, in response to pixel luminance content of at least one image of a sequence of acquired images of the portion of patient anatomy;
- automatically detecting a transition between different states of operation of an invasive instrument in a portion of patient anatomy, in response to a transition in pixel luminance content of at least one image of said sequence of acquired images of the portion of patient anatomy;
- a repository of information associating a plurality of different sets of X-ray imaging device settings with a corresponding plurality of different states of operation of an invasive instrument including a first set of settings associated with a first state and a different second set of settings associated with a different second state, an individual set of X-ray imaging device settings including an X-ray radiation exposure pulse width and at least one of,
- (a) a radiation dose setting and
- (b) an image acquisition frame rate;
- and
- an X-ray imaging device for using said detector and said information for automatically adaptively acquiring a sequence of images of said invasive instrument by sequentially acquiring at least one image in said first state using said first set of settings and at least one image in said second state using said second set of settings, in response to detection of a transition between the first and second states in said phase following the detected peak in contrast agent flow.
5 more elements
A method for Angiographic X-ray imaging, comprising the activities of:
- automatically detecting a peak in contrast agent enhanced blood flow and a phase following the detected peak in contrast agent flow, in response to pixel luminance content of at least one image of a sequence of acquired images of the portion of patient anatomy;
- automatically detecting a transition between different states of operation of an invasive instrument in a portion of patient anatomy, in response to a transition in pixel luminance content of at least one image of said sequence of acquired images of the portion of patient anatomy;
- storing in a repository, information associating a plurality of different sets of X-ray imaging device settings with a corresponding plurality of different phases of contrast agent enhanced blood flow in vessels including a first set of settings associated with a first phase and a different second set of settings associated with a different second phase, an individual set of X-ray imaging device settings including an X-ray radiation exposure pulse width and at least one of,
- (a) a radiation dose setting and
- (b) an image acquisition frame rate;
- and
- automatically adaptively acquiring a sequence of images of said portion of patient anatomy including said invasive instrument in a particular state by sequentially acquiring at least one image in said first phase using said first set of settings and at least one image in said second phase using said second set of settings, in response to detection of a transition between the first and second phases.
4 more elements
A method for Angiographic X-ray imaging, comprising the activities of:
- automatically detecting a peak in contrast agent enhanced blood flow and a phase following the detected peak in contrast agent flow and a change characteristic of pixel luminance content of at least one image of a sequence of acquired images of the portion of patient anatomy, said change characteristic comprising a change between successive images at least one of, (a) exceeding and (b) being below, a predetermined amount over a predetermined minimum area of an image;
- automatically detecting a transition between different states of operation of an invasive instrument in a portion of patient anatomy, in response to a transition in pixel luminance content of at least one image of said sequence of acquired images of the portion of patient anatomy;
- storing in a repository, information associating a plurality of different sets of X-ray imaging device settings with a corresponding plurality of different phases of contrast agent enhanced blood flow in vessels including a first set of settings associated with a first phase and a different second set of settings associated with a different second phase, an individual set of X-ray imaging device settings including at least one of,
- (a) a radiation dose setting and
- (b) an image acquisition frame rate;
- and
- automatically adaptively acquiring a sequence of images of said portion of patient anatomy including said invasive instrument in a particular state by sequentially acquiring at least one image in said first phase using said first set of settings and at least one image in said second phase using said second set of settings, in response to detection of said change in pixel luminance content of at least one image.
4 more elements
Dependencies are inferred from the claim text.