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DOI: 10.1148/radiol.2311030206
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Digital Slot-Scan Charge-coupled Device Radiography versus AMBER and Bucky Screen-Film Radiography for Detection of Simulated Nodules and Interstitial Disease in a Chest Phantom1

Lucia J. M. Kroft, MD, PhD, Jacob Geleijns, PhD, Bart J. A. Mertens, PhD, Wouter J. H. Veldkamp, PhD, Harmine M. Zonderland, MD, PhD and Albert de Roos, MD, PhD

1 From the Departments of Radiology (L.J.M.K., J.G., W.J.H.V., H.M.Z., A.d.R.) and Medical Statistics (B.J.A.M.), C2-S, Leiden University Medical Center, C2S, Albinusdreef 2, 2333 ZA Leiden, the Netherlands. Received February 7, 2003; revision requested April 24; revision received June 13; accepted August 8. Address correspondence to L.J.M.K. (e-mail: l.j.m.kroft@lumc.nl).



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  		Figure 1. Digital chest imaging with a slot-scan technique. X rays are collimated into a narrow fan-shaped beam that moves across the chest simultaneously with the detector. The exposure settings are measured in the downward movement of the detector. The detector’s upward movement represents the acquisition scanning process. The image is gradually built up during scanning. The camera incorporates CCD and time-delay integration technology.

 


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  		Figure 2. Radiograph obtained with CCD digital system shows the simulated chest diseases used in this experiment, including opaque nodules (right upper corner), moderately opaque nodules (left lower corner), interstitial nodular disease (left upper portion), and interstitial linear disease (right lower corner and middle).

 


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  		Figure 3. Radiograph of anthropomorphic chest phantom obtained with CCD digital system shows delineation of the "lungs" (lucent areas, solid line) and "mediastinum" (opaque areas, dotted line). The metallic coins in the left upper and right lower corners were placed on the phantom to facilitate exact positioning of standard-of-reference images over annotated images.

 




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