Computer Simulation of the Effects of Contrast Protocols on Aortic Signal Intensity on Magnetic Resonance Angiograms

Author(s): Toru Higaki*, Yuko Nakamura, Fuminari Tatsugami, Wataru Fukumoto, Kazuo Awai

Journal Name: Current Medical Imaging
Formerly: Current Medical Imaging Reviews

Volume 17 , Issue 3 , 2021

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Graphical Abstract:


Background: While iodine-enhanced computed tomography has been studied, detailed information on gadolinium-enhanced magnetic resonance imaging has not been reported.

Objective: We evaluated the effects of different gadolinium contrast agent (Gd-CA) factors on the enhancement of aortic magnetic resonance angiography (MRA) using computer simulation.

Methods: We developed computer-simulation software that combines pharmacokinetic models and tables; it converts the blood concentration of particular Gd-CAs into the signal intensity (SI). We simulated aortic time-intensity curves (TIC) in our MRA study and compared the effect of the Gd-- CA volume, injection rate, and of different Gd-CAs on the TIC.

Results: An increase in the Gd-CA volume from 14.0 to 28.0 ml increased maximal aortic intensity 1.11 times. Changing the injection rate from 1.0 to 2.8 ml/s increased it 1.10 times. The maximal SI of gadoterate-meglumine and gadobutrol was 1.03 and 1.01 times, respectively, that of gadoteridol.

Conclusion: In our computer-simulated MRA study, different Gd-CA factors resulted in no significant difference in the maximal aortic SI.

Keywords: Gadolinium contrast agent, contrast-enhanced MR, MR angiography, computer simulation, contrast protocol, time-intensity curve.

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Article Details

Year: 2021
Published on: 22 April, 2021
Page: [396 - 403]
Pages: 8
DOI: 10.2174/1573405616999200730180533
Price: $65

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