Method and apparatus for virtual digital subtraction angiography
First Claim
1. A medical imaging system, comprising:
- an imaging device operable to capture two or more image data sets representative of a patient;
a tracking subsystem operable to detect patient position data corresponding to each image data set and device position data corresponding to each image data set, where the patient position data is indicative of the position of the patient and the device position data is indicative of the position of the imaging device;
a motion correction subsystem adapted to receive patient position data corresponding to the first and second image data set and device position data corresponding to the first and second image data set, and the motion correction subsystem is operable to detect a change in relative position between the patient and the imaging device; and
an image subtraction subsystem adapted to receive at least a first image data set and a second image data set from the imaging device, the image subtraction subsystem is operable to perform a digital subtraction operation between the first image data set and the second image data set when no substantial change occurs in the relative position between the patient and the imaging device.
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Abstract
A medical imaging system is provided that detects any change in relative position between the patient and the imaging device and corrects the image data for any motion that occurs. The medical imaging system includes: an imaging device for capturing two or more image data sets representative of a patient; a tracking subsystem for capturing patient position data that is indicative of the position of the patient and device position data that is indicative of the position of the imaging device; an image subtraction subsystem for performing a digital subtraction operation between at least two image data sets; and a motion correction subsystem configured to detect a change in the relative position between the patient and the imaging device and, upon detecting a change in the relative position, compensate in at least one of the first image data set and the second image data set for the change in relative position prior to performing the digital subtraction operation.
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Citations
26 Claims
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1. A medical imaging system, comprising:
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an imaging device operable to capture two or more image data sets representative of a patient;
a tracking subsystem operable to detect patient position data corresponding to each image data set and device position data corresponding to each image data set, where the patient position data is indicative of the position of the patient and the device position data is indicative of the position of the imaging device;
a motion correction subsystem adapted to receive patient position data corresponding to the first and second image data set and device position data corresponding to the first and second image data set, and the motion correction subsystem is operable to detect a change in relative position between the patient and the imaging device; and
an image subtraction subsystem adapted to receive at least a first image data set and a second image data set from the imaging device, the image subtraction subsystem is operable to perform a digital subtraction operation between the first image data set and the second image data set when no substantial change occurs in the relative position between the patient and the imaging device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical imaging system, comprising:
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an imaging device operable to capture two or more image data sets representative of a patient;
a tracking subsystem operable to detect patient position data corresponding to each of the image data sets and device position data corresponding to each the image data sets, where the patient position data is indicative of the position of the patient and the device position data is indicative of the position of the imaging device;
an image subtraction subsystem adapted to receive at least a first image data set and a second image data set from the imaging device, the image subtraction subsystem operable to perform a digital subtraction operation between the first image data set and the second image data set; and
a motion correction subsystem adapted to receive patient position data corresponding to the first and second image data sets and device position data corresponding to the first and second image data sets, and the motion correction subsystem is operable to measure a change in relative position between the patient and the imaging device and, upon detecting a change in the relative position, compensate in at least one of the first image data set and the second image data set for the change in relative position, prior to performing the digital subtraction operation. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for performing a digital subtraction operation in a medical imaging device, comprising:
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capturing a first image data set representative of a patient;
detecting first patient position data indicative of the position of the patient during acquisition of the first image data set;
detecting first device position data indicative of the position of the imaging device during acquisition of the first image data set;
capturing a second image data set representative of the patient;
detecting second patient position data indicative of the position of the patient during acquisition of the second image data set;
detecting second device position data indicative of the position of the imaging device during acquisition of the second image data set;
determining if a change occurs in the relative position between the patient and the imaging device during a time interval between the acquisition of the first image data set and the acquisition of the second image data set; and
performing a digital subtraction operation between the first image data set and the second image data set, when no substantial change occurs in the relative position between the patient and the imaging device. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification