Patent Document ID: 5481115
Application ID: 08170811
Patent Flag: 1

Claim One:
1. A nuclear camera system comprising: at least one radiation detector head for detecting radiation in an examination region, the radiation detection head including a collimator; a means for moving the detector head relative to the examination region; an image reconstruction means for reconstructing image data from the detector head into a diagnostic image representation; an image memory for storing the image representation; a display means for converting at least selected portions of data in the image memory into a human-readable display; a calibration phantom removably inserted in the examination region, the phantom including first and second lines of radiation sources, each line including at least three radiation sources and the first and second lines having a preselected, fixed orientation relative to each other; a means for analyzing the data from the detector head as the detector head is moved relative to the phantom to generate detector head misalignment parameter values; an electronic correcting means for correcting the image reconstruction means in accordance with the misalignment parameter values.