CT colonography at low tube potential: Using iterative reconstruction to decrease noise

K. J. Chang, M. A. Heisler, Mahadevappa Mahesh, G. L. Baird, W. W. Mayo-Smith

Research output: Contribution to journalArticle

Abstract

Aim To determine the level of iterative reconstruction required to reduce increased image noise associated with low tube potential computed tomography (CT). Materials and methods Fifty patients underwent CT colonography with a supine scan at 120 kVp and a prone scan at 100 kVp with other scan parameters unchanged. Both scans were reconstructed with filtered back projection (FBP) and increasing levels of adaptive statistical iterative reconstruction (ASiR) at 30%, 60%, and 90%. Mean noise, soft tissue and tagged fluid attenuation, contrast, and contrast-to-noise ratio (CNR) were collected from reconstructions at both 120 and 100 kVp and compared using a generalised linear mixed model. Results Decreasing tube potential from 120 to 100 kVp significantly increased image noise by 30-34% and tagged fluid attenuation by 120 HU at all ASiR levels (p

Original languageEnglish (US)
Pages (from-to)981-988
Number of pages8
JournalClinical Radiology
Volume70
Issue number9
DOIs
StatePublished - Sep 1 2015

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Noise
Tomography
Linear Models

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Medicine(all)

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CT colonography at low tube potential : Using iterative reconstruction to decrease noise. / Chang, K. J.; Heisler, M. A.; Mahesh, Mahadevappa; Baird, G. L.; Mayo-Smith, W. W.

In: Clinical Radiology, Vol. 70, No. 9, 01.09.2015, p. 981-988.

Research output: Contribution to journalArticle

Chang, K. J. ; Heisler, M. A. ; Mahesh, Mahadevappa ; Baird, G. L. ; Mayo-Smith, W. W. / CT colonography at low tube potential : Using iterative reconstruction to decrease noise. In: Clinical Radiology. 2015 ; Vol. 70, No. 9. pp. 981-988.
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