Radiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

DOI: 10.1148/radiol.2343031805
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Metz, S.
Right arrow Articles by Link, T. M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Metz, S.
Right arrow Articles by Link, T. M.
(Radiology 2005;234:776-784.)
© RSNA, 2005

Experimental Studies

Chest Radiography with a Digital Flat-Panel Detector: Experimental Receiver Operating Characteristic Analysis1

Stephan Metz, MD, Petra Damoser, Regina Hollweck, Rudolf Roggel, MD, Christoph Engelke, MD, Klaus Woertler, MD, Bernhard Renger, MS, Ernst J. Rummeny, MD and Thomas M. Link, MD

1 From the Department of Diagnostic Radiology (S.M., P.D., R.R., C.E., K.W., B.R., E.J.R., T.M.L.) and Institute of Medical Statistics and Epidemiology (R.H.), Technische Universität München, Ismaninger Str 22, 81675 Munich, Germany. Received November 11, 2003; revision requested February 3, 2004; revision received April 21; accepted June 2. Address correspondence to S.M. (e-mail: smetz@roe.med.tu-muenchen.de).

PURPOSE: To evaluate the influence of different detector radiation doses and peak kilovoltage settings on diagnostic performance and radiation dose at posteroanterior (PA) chest radiography performed with an amorphous silicon flat-panel detector (FPD).

MATERIALS AND METHODS: All examinations were performed by using a digital FPD. PA chest radiographs of an anthropomorphic chest phantom were obtained with detector radiation doses of 2.50 µGy (system speed, 400), 1.56 µGy (speed, 640), and 1.25 µGy (speed, 800) and with peak kilovoltage values of 100, 120, and 140 kVp. Four types of simulated lesions—nodules of different sizes, polylobulated lesions, interstitial-nodular lesions, and interstitial-reticular lesions—were superimposed on the phantom. After four radiologists assessed all of the images, receiver operating characteristics analysis was performed. In addition, the entrance surface dose was measured and the effective dose was calculated.

RESULTS: Reduced detector dose led to significantly decreased diagnostic performance in overall lesion detection (P < .05). However, over pulmonary areas only, this effect could not be seen. With use of the same kilovoltage values, reducing the detector dose, even to 1.25 µGy (speed, 800), did not lead to significantly decreased lesion detectability. In terms of diagnostic performance and effective dose, 120 kVp was the most effective.

CONCLUSION: Standard PA chest radiographs should still be acquired at a detector dose of 2.50 µGy (speed, 400) with 120 kVp to yield the highest diagnostic performance. However, when the present analysis was focused on the lung fields only, no significant loss in diagnostic performance could be demonstrated, even after a 50% reduction in radiation dose.

© RSNA, 2005




This article has been cited by other articles:


Home page
 Br. J. Radiol.Home page
L J M Kroft, W J H Veldkamp, B J A Mertens, J-P A van Delft, and J Geleijns
Dose reduction in digital chest radiography and perceived image quality
Br. J. Radiol., December 1, 2007; 80(960): 984 - 988.
[Abstract] [Full Text] [PDF]

Home page
 RadiologyHome page
L. J. M. Kroft, W. J. H. Veldkamp, B. J. A. Mertens, J. P. A. van Delft, and J. Geleijns
Detection of simulated nodules on clinical radiographs: dose reduction at digital posteroanterior chest radiography.
Radiology, November 1, 2006; 241(2): 392 - 398.
[Abstract] [Full Text] [PDF]