PMID: 16532935Mar 15, 2006Paper

Resolution and noise measurements of five CRT and LCD medical displays

Medical Physics
Robert S Saunders, Ehsan Samei

Abstract

The performance of soft-copy displays plays a significant role in the overall image quality of a digital radiographic system. In this work, we discuss methods to characterize the resolution and noise of both cathode ray tube (CRT) and liquid crystal display (LCD) devices. We measured the image quality of five different commercial display devices, representing both CRT and LCD technologies, using a high-quality charge-coupled device (CCD) camera. The modulation transfer function (MTF) was calculated using the line technique, correcting for the MTF of the CCD camera and the display pixel size. The normalized noise power spectrum (NPS) was computed from two-dimensional Fourier analysis of uniform images. To separate the effects of pixel structure from interpixel luminance variations, we created structure-free images by eliminating the pixel structures of the display device. The NPS was then computed from these structure-free images to isolate interpixel luminance variations. We found that the MTF of LCDs remained close to the theoretical limit dictated by their inherent pixel size (0.85 +/- 0.08 at Nyquist frequency), in contrast to the MTF for the two CRT displays, which dropped to 0.15 +/- 0.08 at the Nyquist frequency. However,...Continue Reading

References

May 1, 1997·Dento Maxillo Facial Radiology·A Workman, D S Brettle
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Aug 6, 1999·Medical Physics·M B WilliamsP U Simoni
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Dec 6, 2003·Medical Physics·Robert S Saunders, Ehsan Samei
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Citations

Jul 1, 2008·Radiological Physics and Technology·Katsuhiro IchikawaKosuke Matsubara
Jul 1, 2009·Radiological Physics and Technology·Shiro HatanakaYoshiharu Higashida
Aug 23, 2012·Radiological Physics and Technology·Hiroshi AkamineHidetake Yabuuchi
May 22, 2008·Medical Physics·Ehsan SameiDavid M Delong
Nov 4, 2008·Medical Physics·Robert S Saunders, Ehsan Samei
Aug 21, 2007·The British Journal of Radiology·D S Brettle
Jul 24, 2008·Nihon Hoshasen Gijutsu Gakkai zasshi·Katsuhiro IchikawaKazuya Ohashi
Oct 31, 2006·Academic Radiology·Robert S SaundersDag Pavic
Feb 21, 2008·Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·Sarah M Puchalski
Nov 4, 2008·Medical Physics·Samuel G Armato, Bram van Ginneken
Apr 17, 2007·Academic Radiology·Ehsan SameiJohn M Lewin
Dec 21, 2018·Investigative Radiology·Dennis MackinLaurence Court
May 12, 2016·Journal of Applied Clinical Medical Physics·David MozejkoAnne Catrine Trægde Martinsen

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