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Detection of small vessels with electron beam computed tomographic angiography using 1.5 and 3 mm collimator protocols

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Abstract

Objectives

To evaluate the effect of scanner collimation on the ability to detect small cardiac vessels using electron beam CT coronary angiography (EBA).

Materials and methods

EBA scans from 40 patients who underwent study on two separate occasions with 3 mm (initial scan) and 1.5 mm (follow-up scan) collimation protocols were analyzed. Vessels of <2 mm in diameter were identified.

Results

The 1.5 mm collimation allowed 3-D visualization of 129 vessels <2 mm in diameter, while 3 mm collimation only allowed visualization of 89 vessels (p<0.001). The right coronary artery branches and distal LAD segments though were not displayed satisfactorily in almost half of the 3-D studies with either protocol.

Conclusions

There was significant improvement in detection of small cardiac vessels with a 1.5 mm collimation EBA protocol compared to a 3 mm protocol. Both protocols though were insufficient for reliable visualization of the right coronary artery branches and distal LAD segments.

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Abbreviations

EBA:

electron beam CT coronary angiography

EBT:

electron beam tomography

HU:

Hounsfield unit

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Acknowledgements

The authors thank David Hill and Philip Chang for instruction and help for this study.

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Authors and Affiliations

  1. Division of Cardiology, Harbor-UCLA Research and Education Institute, Torrance, CA, USA

    Songshou Mao, Jerold S. Shinbane, Ronald J. Oudiz, Ferdinand Flores, Alex Chau, Stephen Liu, Shaojun Wang, Yanlin Gao & Matthew J. Budoff

Authors
  1. Songshou Mao
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  2. Jerold S. Shinbane
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  3. Ronald J. Oudiz
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  4. Ferdinand Flores
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  5. Alex Chau
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  6. Stephen Liu
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  7. Shaojun Wang
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  8. Yanlin Gao
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  9. Matthew J. Budoff
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Corresponding author

Correspondence to Matthew J. Budoff.

Additional information

Address for correspondence: Matthew J. Budoff, MD, Harbour-UCLA Research and Education Institute, 1124 W. Carson Street, RB2, Torrance, CA 90502, USA Tel.: +1-310-222-4107; Fax: +1-310-787-0448; E-mail: mbudoff@labiomed.org

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Mao, S., Shinbane, J.S., Oudiz, R.J. et al. Detection of small vessels with electron beam computed tomographic angiography using 1.5 and 3 mm collimator protocols. Int J Cardiovasc Imaging 22, 275–282 (2006). https://doi.org/10.1007/s10554-005-9002-6

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  • DOI: https://doi.org/10.1007/s10554-005-9002-6

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