Scatter correction methods and systems in single photon emission computed tomography
First Claim
1. An emission tomographic system for imaging an object of interest, said system comprising a gantry having at least one detector secured thereto, a patient table, at least one transmitting source, and a computer coupled to the gantry and to the detector to detect and control the position of the detector relative to the table, said transmitting source configured to transmit gamma rays toward said detector, said system configured to:
- determine a transmission measurement; and
generate a three-dimensional scatter fraction utilizing the transmission measurement.
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Abstract
An emission tomographic system for imaging an object of interest is described. The system, in one form, includes a gantry and a patient table. A detector including a collimator is secured to the gantry, and a computer is coupled to the gantry and to the detector to detect and control the position of the detector relative to the table. The system is configured to determine a transmission measurement and generate a scatter fraction utilizing the transmission measurement. A dual energy window data acquisition algorithm then determines non-scatter photons in a primary energy window utilizing the scatter fraction.
63 Citations
20 Claims
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1. An emission tomographic system for imaging an object of interest, said system comprising a gantry having at least one detector secured thereto, a patient table, at least one transmitting source, and a computer coupled to the gantry and to the detector to detect and control the position of the detector relative to the table, said transmitting source configured to transmit gamma rays toward said detector, said system configured to:
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determine a transmission measurement; and generate a three-dimensional scatter fraction utilizing the transmission measurement. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for performing a tomographic scan of an object with an emission tomographic system including a gantry having at least one detector and at least one transmitting source secured thereto, a patient table, and a processor coupled to the gantry and to the detector to detect and control the position of the detector relative to the table, said method comprising the steps of:
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determining a transmission measurement; and generating a three-dimensional scatter fraction utilizing the transmission measurement. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for performing scatter correction in radiographic imaging, said method comprising the steps of:
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acquiring projection data for a primary window; generating a three-dimensional scatter fraction; and generating estimated scattered projections in the primary window using the three-dimensional scatter fraction. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification