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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-18681

Herzog, B A; Husmann, L; Valenta, I; Tay, F M; Burkhard, N; Gaemperli, O; Wyss, C A; Landmesser, U; Kaufmann, P A (2009). Determinants of vessel contrast in BMI-adapted low dose CT coronary angiography with prospective ECG-triggering. The International Journal of Cardiovascular Imaging, 25(6):625-630.

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We evaluated the determinants of vessel contrast in prospectively ECG-triggered CT coronary angiography (CTCA). Seventy patients underwent low-dose CTCA using Body Mass Index (BMI)-adapted tube parameters and a fixed contrast material bolus. Contrast to noise ratio (CNR) was calculated from contrast (between coronaries and perivascular tissue) and image noise (standard deviation of aortic attenuation). Cardiac output (CO) was calculated from gated (99m)Tc-tetrofosmin-SPECT. Mean radiation dose was 2.13 +/- 0.69 mSv. Image noise was not affected by BMI (r = 0.1, P = 0.36), while CNR was inversely related to body surface area (BSA) (r = -0.5, P < 0.001) and CO (r = -0.45, P < 0.001). After successfully overcoming the impact of BMI on image noise by adapting tube parameters, CNR mainly depends on coronary vessel contrast. The latter reflects the dilution of the contrast material by blood volume and CO, which are both correlated to BSA. Therefore, BSA adapted contrast administration may help to compensate for this effect.


28 citations in Web of Science®
28 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Nuclear Medicine
04 Faculty of Medicine > Center for Integrative Human Physiology
04 Faculty of Medicine > University Hospital Zurich > Clinic for Cardiology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Date:19 April 2009
Deposited On:29 May 2009 15:14
Last Modified:05 Apr 2016 13:14
Additional Information:The original publication is available at www.springerlink.com
Publisher DOI:10.1007/s10554-009-9460-3
PubMed ID:19381867

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