Simulated dose reduction in conventional chest CT: Validation study

John R. Mayo, Kenneth P. Whittall, Ann N. Leung, Thomas E. Hartman, Chan Sup Park, Steven L. Primack, G. Keith Chambers, Mark K. Limkeman, Thomas L. Toth, Stanley H. Fox

Research output: Contribution to journalArticle

101 Citations (Scopus)

Abstract

PURPOSE: To validate a technique of computer-simulated dose reduction for conventional chest computed tomography (CT). MATERIALS AND METHODS: In 27 patients, CT scans were obtained at 200, 100, and 40 mAs at two levels. The raw data from the 200-mAs scan were modified on a computer workstation to simulate the increased noise present on 100-and 40-mAs scans. Real and simulated 100-and 40-mAs images were independently assessed in random order for overall image quality and radiologic findings by four subspecialty- trained chest radiologists who were blinded to the technique. The four observers were given paired real and simulated images. They were asked to identify the real image and note any difference in diagnostic quality. RESULTS: No difference was seen in overall image quality or radiologic findings between real and simulated images (P > .05). In the paired comparison, 433 of 864 (50.1%) real images were correctly identified. CONCLUSION: Computer modification of 200-mAs raw scan data to simulate 100- and 40-mAs noise levels produces reconstructed images indistinguishable from real 100- and 40-mAs scans. This technique provides realistic reduced-dose images without patient radiation exposure and with identical image registration and motion artifact.

Original languageEnglish (US)
Pages (from-to)453-457
Number of pages5
JournalRadiology
Volume202
Issue number2
StatePublished - Feb 1997

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Validation Studies
Thorax
Tomography
Noise
Matched-Pair Analysis
Artifacts

Keywords

  • Computed tomography (CT), comparative studies
  • Computed tomography (CT), image quality
  • Computed tomography (CT), technology
  • Radiations, exposure to patients and personnel

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

Cite this

Mayo, J. R., Whittall, K. P., Leung, A. N., Hartman, T. E., Park, C. S., Primack, S. L., ... Fox, S. H. (1997). Simulated dose reduction in conventional chest CT: Validation study. Radiology, 202(2), 453-457.

Simulated dose reduction in conventional chest CT : Validation study. / Mayo, John R.; Whittall, Kenneth P.; Leung, Ann N.; Hartman, Thomas E.; Park, Chan Sup; Primack, Steven L.; Chambers, G. Keith; Limkeman, Mark K.; Toth, Thomas L.; Fox, Stanley H.

In: Radiology, Vol. 202, No. 2, 02.1997, p. 453-457.

Research output: Contribution to journalArticle

Mayo, JR, Whittall, KP, Leung, AN, Hartman, TE, Park, CS, Primack, SL, Chambers, GK, Limkeman, MK, Toth, TL & Fox, SH 1997, 'Simulated dose reduction in conventional chest CT: Validation study', Radiology, vol. 202, no. 2, pp. 453-457.
Mayo JR, Whittall KP, Leung AN, Hartman TE, Park CS, Primack SL et al. Simulated dose reduction in conventional chest CT: Validation study. Radiology. 1997 Feb;202(2):453-457.
Mayo, John R. ; Whittall, Kenneth P. ; Leung, Ann N. ; Hartman, Thomas E. ; Park, Chan Sup ; Primack, Steven L. ; Chambers, G. Keith ; Limkeman, Mark K. ; Toth, Thomas L. ; Fox, Stanley H. / Simulated dose reduction in conventional chest CT : Validation study. In: Radiology. 1997 ; Vol. 202, No. 2. pp. 453-457.
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AU - Primack, Steven L.

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