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Rotating X-Ray Collimating Slit for Line-Scan Dual-Energy Medical Imaging

1984; Institute of Electrical and Electronics Engineers; Volume: 31; Issue: 1 Linguagem: Inglês

10.1109/tns.1984.4333316

1558-1578

Herbert Zeman, E. B. Hughes, J. N. Otis, J. Rolfe, A. C. Thompson,

Medical Imaging Techniques and Applications

A rotating slit system has been designed and tested which can effectively translate a fan-shaped X-ray beam at the same average speed and in the same direction of travel as a patient moving continuously during a line-scan dual-energy medical imaging procedure. The slit has been shown to eliminate the artifacts due to bone in logarithmically subtracted images obtained with monochromatic X-ray beams derived from synchrotron radiation, where one beam is just above and the other just below the K-edge of iodine. Images of iodine-containing phantoms and in vivo canine images after intravenous iodine injection show vessel detail without artifacts due to bone. Corresponding images taken without the rotating slit have severe artifacts.