Picker International, Inc.

Summit World Trade Corporation

John M Hayes

Matthew P Grabnic

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.

Autonomous tangential motion control in a multi-detector gamma camera

Method and apparatus for imaging of a subject. Radiation intensity data is transformed to a frequency domain, filtered, retransformed and then backprojected to allow an operator to examine a cross sectional image of the subject. Based upon this image, a filter function is adjusted and a second image is presented. Further adjustments can be made in the filter function to fine tune the image. The filter adjustments are all rapidly performed with the aid of a pointing device that can easily and intuitively allow the user to adjust the filter function characteristics.

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Macedonia, OH, United States of America

John M Hayes