Cardiac output obtained from test bolus injections as a factor in contrast injection rate revision of following coronary CT angiography

Masahiko Konno, Yoshiyuki Hosokai, Akihito Usui, Mitsuya Abe, Toshiki Tateishi, Yusuke Kawasumi, Masashi Tsuda, Hideki Ota, Kei Takase, Haruo Saito

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background: Optimal contrast enhancement is crucial for the detection of coronary artery stenoses and atherosclerotic changes in coronary CT angiography (CTA). Purpose: To demonstrate the feasibility of using the cardiac output (CO) obtained from the test bolus injection data-set (COtest) as a factor in contrast injection rate revision of the following coronary CTA. Material and Methods: The test bolus injection data-sets of 52 consecutive coronary CTAs were examined. COtest was calculated from the test bolus data-set. Aortic peak enhancement (APE) was measured on the following coronary CTA. We simulated the APE at a fixed contrast injection rate of 4 mL/s (simAPE) in each patient. Results: The ranges of COtest and simAPE were 2.82-7.56 L/min and 194-527 Hounsfield Units, respectively. There was a significant negative correlation (R = -0.802, P < 0.001) between simAPE and COtest. Conclusion: COtest can be used for injection rate revision on coronary CTA.

Original languageEnglish
Pages (from-to)1107-1111
Number of pages5
JournalActa Radiologica
Volume53
Issue number10
DOIs
Publication statusPublished - 2012 Dec 1

Keywords

  • Aorta
  • CT angiography
  • Cardiac
  • Contrast agents - intravenous
  • Heart
  • Vascular

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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