PMID: 8947895Nov 1, 1996Paper

Pulsed fluoroscopy detectability from interspersed adaptive forced-choice measurements

Medical Physics
P Xue, D L Wilson

Abstract

Using a new reference/test, adaptive forced-choice method, we investigated detectability of low contrast disks in simulated x-ray fluoroscopy image sequences. The method minimized effects of undesirable variables, such as changes in subject attention level by alternating conventional fluoroscopy (reference) and low acquisition rate fluoroscopy (test) presentations. To compare absolute target detectability and x-ray dose requirements of reference and test presentations, the contrast of the test presentation was set equal to that of the reference presentation, and the dose of the test presentation was adapted to give equivalent detectability of disk targets. Comparing pulsed fluoroscopy at 15 acq/s (pulsed-15) and 7.5 acq/s (pulsed-7.5) with conventional fluoroscopy at 30 acq/s (pulsed-30), dose savings were found in 22 of 24 experiments. When averaged over 3 disk sizes and 4 subjects, savings were 22% and 26% for pulsed-15 and pulsed-7.5, respectively. In most experiments, the subject was given an unlimited time to view presentations. With unlimited display times, subjects took slightly longer to respond for pulsed-15 or pulsed-7.5 than for pulsed-30. In other experiments, display times were limited. As the restricted display ti...Continue Reading

Citations

Feb 24, 2007·Journal of Digital Imaging·Akihiro TakemuraTokuo Umeda
Dec 12, 2000·Radiographics : a Review Publication of the Radiological Society of North America, Inc·M S Van Lysel
Feb 6, 2008·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·F J Sanchez-MarinD L Wilson
Aug 22, 2001·IEEE Transactions on Medical Imaging·K S KumpD L Wilson
Apr 8, 1999·IEEE Transactions on Medical Imaging·D L WilsonR Aufrichtig
Jun 3, 1998·Medical Physics·P Xue, D L Wilson
Jul 4, 2002·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Kadri N Jabri, David L Wilson
Jan 11, 2001·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·R M Manjeshwar, D L Wilson
Mar 27, 2001·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·R M Manjeshwar, D L Wilson
Mar 9, 1999·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·A E Burgess
Mar 9, 1999·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·D L Wilson, R Manjeshwar
Feb 11, 1998·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·P Xue, D L Wilson
Mar 9, 1999·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·K N Jabri, D L Wilson
Jul 15, 2015·Journal of Medical Imaging·Christopher P FavazzaBeth A Schueler
Mar 29, 2019·Physics in Medicine and Biology·Marco BertoliniCaterina Ghetti

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