4-D micro-CT of the mouse heart.

Published

Journal Article

PURPOSE: Demonstrate noninvasive imaging methods for in vivo characterization of cardiac structure and function in mice using a micro-CT system that provides high photon fluence rate and integrated motion control. MATERIALS AND METHODS: Simultaneous cardiac- and respiratory-gated micro-CT was performed in C57BL/6 mice during constant intravenous infusion of a conventional iodinated contrast agent (Isovue-370), and after a single intravenous injection of a blood pool contrast agent (Fenestra VC). Multiple phases of the cardiac cycle were reconstructed with contrast to noise and spatial resolution sufficient for quantitative assessment of cardiac function. RESULTS: Contrast enhancement with Isovue-370 increased over time with a maximum of approximately 500 HU (aorta) and 900 HU (kidney cortex). Fenestra VC provided more constant enhancement over 3 hr, with maximum enhancement of approximately 620 HU (aorta) and approximately 90 HU (kidney cortex). The maximum enhancement difference between blood and myocardium in the heart was approximately 250 HU for Isovue-370 and approximately 500 HU for Fenestra VC. In mice with Fenestra VC, volumetric measurements of the left ventricle were performed and cardiac function was estimated by ejection fraction, stroke volume, and cardiac output. CONCLUSION: Image quality with Fenestra VC was sufficient for morphological and functional studies required for a standardized method of cardiac phenotyping of the mouse.

Full Text

Duke Authors

Cited Authors

  • Badea, CT; Fubara, B; Hedlund, LW; Johnson, GA

Published Date

  • April 2005

Published In

Volume / Issue

  • 4 / 2

Start / End Page

  • 110 - 116

PubMed ID

  • 16105509

Pubmed Central ID

  • 16105509

Electronic International Standard Serial Number (EISSN)

  • 1536-0121

International Standard Serial Number (ISSN)

  • 1535-3508

Digital Object Identifier (DOI)

  • 10.1162/15353500200504187

Language

  • eng