Autonomous tangential motion control in a multi-detector gamma camera
First Claim
1. A method of imaging utilizing a gamma camera having first and second detectors disposed about an examination region, the method comprising:
- placing the detectors in a desired position with respect to the examination region, the step of placing includingdetermining an actual position of the first detector; and
moving the second detector based on the actual position of the first detector;
utilizing the detectors to detect radiation; and
generating an image indicative of the detected radiation.
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Accused Products
Abstract
The configuration of a multi-head gamma camera requires coordination between tangential and radial motions so that the detectors maintain a desired orientation, either corner to corner or overlapping. Based on the radial and angular positions of the detectors, desired tangential positions are determined. The desired tangential positions are compared with the actual tangential positions, to generate position error signals. Tangential motion is initiated to reduce the position errors. If the required tangential motion exceeds the capability of the tangential drive or cannot be achieved, the radial motion is slowed or stopped.
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Citations
16 Claims
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1. A method of imaging utilizing a gamma camera having first and second detectors disposed about an examination region, the method comprising:
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placing the detectors in a desired position with respect to the examination region, the step of placing including determining an actual position of the first detector; and moving the second detector based on the actual position of the first detector; utilizing the detectors to detect radiation; and generating an image indicative of the detected radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of imaging utilizing a gamma camera having first and second detectors disposed about an examination region, the method comprising:
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placing the detectors in a desired position with respect to the examination region, the step of placing including determining a position of the first detector; determining a desired motion for the second detector based on the position of the first detector; comparing the desired motion to a limit; and limiting a motion of the first detector if the desired motion exceeds the limit; utilizing the detectors to detect radiation; and generating an image indicative of the detected radiation. - View Dependent Claims (14, 15)
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16. In a gamma camera having first, second, and third detectors disposed about an examination region, a method of positioning the detectors with respect to the examination region comprising the steps of:
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determining a radial position of the second and third detectors; utilizing the radial positions of the second and third detectors to determine a desired tangential velocity for the first detector; comparing the desired tangential velocity to a limit velocity; if the desired tangential velocity is greater than the limit velocity, limiting a radial velocity of at least one of the second and third detectors.
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Specification