Feasibility of contrast material volume reduction in coronary artery imaging using 320-slice volume CT.

Abstract:

OBJECTIVE:To assess reduced volumes of contrast agent on image quality for coronary computed tomography angiography (CCTA) by using single-beat cardiac imaging with 320-slice CT. MATERIALS AND METHODS:Forty consecutive male patients (mean age: 55.8 years) undergoing CCTA with body weight or=55% were included. Image acquisition protocol was standardized (120 kV, 400 mA, and prospective ECG-triggered single-beat nonspiral CCTA). Patients were randomly assigned to one of four groups (G1: received 40 ml, G2: 50 ml, G3: 60 ml, G4: 70 ml). Groups were compared with respect to aortic attenuation, image noise, and image quality. RESULTS:CT values (mean +/- standard deviation) in the aortic root were measured as 423 +/- 38 HU in G1, and 471 +/- 68, 463 +/- 60, and 476 +/- 78 HU in G2-4, respectively. There were no statistically significant differences in attenuation among the groups (P > 0.068). All 40 CT datasets were rated diagnostic, and image noise and image quality were not statistically different among groups. CONCLUSION:Using 320-slice volume CT, diagnostic image quality can be achieved with 40 ml of contrast material in CCTA in patients with normal body weight, cardiac function, and low heart rate.

journal_name

Eur Radiol

journal_title

European radiology

authors

Hein PA,May J,Rogalla P,Butler C,Hamm B,Lembcke A

doi

10.1007/s00330-009-1692-z

subject

Has Abstract

pub_date

2010-06-01 00:00:00

pages

1337-43

issue

6

eissn

0938-7994

issn

1432-1084

journal_volume

20

pub_type

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