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Proceedings Paper

Performance assessment of a simple and accurate grid alignment aid for portable chest imaging
Author(s): Xiaohui Wang; Weidong Huang; David H. Foos; Michael K. Rogers
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Paper Abstract

An x-ray anti-scatter grid alignment aid has been developed and its performance evaluated for portable chest radiographic exams. The grid alignment aid consists of one line laser and one cross-hair laser mounted on a supporting frame. During an x-ray exam, the two lasers generate a predetermined light pattern on the x-ray collimator to indicate the optimal x-ray source position in the three-dimensional (3D) space. Two grids commonly used in portable chest exams (40 lp/cm resolution, 6:1 and 8:1 ratio, and 130 cm focal distance) were characterized in terms of the signal-to-noise ratio improvement factor (SIF), as a function of the source image distance (SID), and x-ray tube lateral displacement from which the optimal grid operation range was determined. Data indicated the grid alignment aid was able to provide sufficient accuracy for positioning the x-ray tube to achieve optimal grid usage.

Paper Details

Date Published: 18 March 2008
PDF: 8 pages
Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69133N (18 March 2008); doi: 10.1117/12.770533
Show Author Affiliations
Xiaohui Wang, Carestream Health, Inc. (United States)
Weidong Huang, Carestream Health, Inc. (United States)
David H. Foos, Carestream Health, Inc. (United States)
Michael K. Rogers, Carestream Health, Inc. (United States)

Published in SPIE Proceedings Vol. 6913:
Medical Imaging 2008: Physics of Medical Imaging
Jiang Hsieh; Ehsan Samei, Editor(s)

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