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Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study.

Publication ,  Journal Article
Bashir, MR; Weber, PW; Husarik, DB; Howle, LE; Nelson, RC
Published in: Int J Cardiovasc Imaging
August 2012

To assess whether a scan triggering technique based on the slope of the time-attenuation curve combined with table speed optimization may improve arterial enhancement in aortic CT angiography compared to conventional threshold-based triggering techniques. Measurements of arterial enhancement were performed in a physiologic flow phantom over a range of simulated cardiac outputs (2.2-8.1 L/min) using contrast media boluses of 80 and 150 mL injected at 4 mL/s. These measurements were used to construct computer models of aortic attenuation in CT angiography, using cardiac output, aortic diameter, and CT table speed as input parameters. In-plane enhancement was calculated for normal and aneurysmal aortic diameters. Calculated arterial enhancement was poor (<150 HU) along most of the scan length using the threshold-based triggering technique for low cardiac outputs and the aneurysmal aorta model. Implementation of the slope-based triggering technique with table speed optimization improved enhancement in all scenarios and yielded good- (>200 HU; 13/16 scenarios) to excellent-quality (>300 HU; 3/16 scenarios) enhancement in all cases. Slope-based triggering with table speed optimization may improve the technical quality of aortic CT angiography over conventional threshold-based techniques, and may reduce technical failures related to low cardiac output and slow flow through an aneurysmal aorta.

Duke Scholars

Published In

Int J Cardiovasc Imaging

DOI

EISSN

1875-8312

Publication Date

August 2012

Volume

28

Issue

6

Start / End Page

1533 / 1543

Location

United States

Related Subject Headings

  • Time Factors
  • Regional Blood Flow
  • Radiographic Image Interpretation, Computer-Assisted
  • Predictive Value of Tests
  • Pilot Projects
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Multidetector Computed Tomography
  • Models, Cardiovascular
  • Linear Models
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Bashir, M. R., Weber, P. W., Husarik, D. B., Howle, L. E., & Nelson, R. C. (2012). Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study. Int J Cardiovasc Imaging, 28(6), 1533–1543. https://doi.org/10.1007/s10554-011-9945-8
Bashir, Mustafa R., Paul W. Weber, Daniela B. Husarik, Laurens E. Howle, and Rendon C. Nelson. “Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study.Int J Cardiovasc Imaging 28, no. 6 (August 2012): 1533–43. https://doi.org/10.1007/s10554-011-9945-8.
Bashir MR, Weber PW, Husarik DB, Howle LE, Nelson RC. Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study. Int J Cardiovasc Imaging. 2012 Aug;28(6):1533–43.
Bashir, Mustafa R., et al. “Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study.Int J Cardiovasc Imaging, vol. 28, no. 6, Aug. 2012, pp. 1533–43. Pubmed, doi:10.1007/s10554-011-9945-8.
Bashir MR, Weber PW, Husarik DB, Howle LE, Nelson RC. Improved aortic enhancement in CT angiography using slope-based triggering with table speed optimization: a pilot study. Int J Cardiovasc Imaging. 2012 Aug;28(6):1533–1543.

Published In

Int J Cardiovasc Imaging

DOI

EISSN

1875-8312

Publication Date

August 2012

Volume

28

Issue

6

Start / End Page

1533 / 1543

Location

United States

Related Subject Headings

  • Time Factors
  • Regional Blood Flow
  • Radiographic Image Interpretation, Computer-Assisted
  • Predictive Value of Tests
  • Pilot Projects
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Multidetector Computed Tomography
  • Models, Cardiovascular
  • Linear Models