Evaluation of a quality control phantom for digital chest radiography

Journal of Applied Clinical Medical Physics
E MahDonald Peck

Abstract

To examine the effectiveness and suitability of a quality control (QC) phantom for a routine QC program in digital radiography. The chest phantom consists of copper and aluminum cutouts arranged to resemble the appearance of a chest. Performance of the digital radiography (DR) system is evaluated using high and low contrast resolution objects placed in the "heart," "lung," and "subdiaphragm" areas of the phantom. In addition, the signal levels from these areas were compared to similar areas from clinical chest radiographs. The test objects included within the phantom were effective in assessing image quality except within the subdiaphragm area, where most of the low contrast disks were visible. Spatial resolution for the DR systems evaluated with the phantom ranged from 2.6 lp/mm to 4 lp/mm, falling within the middle of the line pair range provided. The signal levels of the heart and diaphragm regions relative to the lung region of the phantom were significantly higher than in clinical chest radiographs (0.67 versus 0.21 and 0.28 versus 0.10 for the heart and diaphragm regions, respectively). The heart-to-diaphragm signal level ratio, however, was comparable to those in clinical radiographs. The findings suggest that the attenu...Continue Reading

References

May 1, 1995·Journal of Digital Imaging·M FreedmanS K Mun
Jan 1, 1997·Radiology·H G ChotasC E Ravin

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Citations

Mar 25, 2011·Journal of Medical Physics·Wilbroad MuhogoraPeter Msaki
Apr 4, 2003·Medical Physics·Alexander L C KwanLawrence H Le
Jul 18, 2003·Journal of Thoracic Imaging·Johny VerschakelenTom Deprez
Mar 17, 2005·Journal of Applied Clinical Medical Physics·Gaetano CompagnoneCarlo Bergamini
Feb 18, 2010·Journal of Applied Clinical Medical Physics·Thomas BoltzMetin Akay
Jun 4, 2005·Radiation Protection Dosimetry·P DoyleD Gentle
Feb 26, 2021·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Mohammadi HosseinSoltani-Nabipour Jamshid

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