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High-resolution imaging of murine myocardial infarction with delayed-enhancement cine micro-CT.

Publication ,  Journal Article
Nahrendorf, M; Badea, C; Hedlund, LW; Figueiredo, J-L; Sosnovik, DE; Johnson, GA; Weissleder, R
Published in: Am J Physiol Heart Circ Physiol
June 2007

The objective of this study was to determine the feasibility of delayed-enhancement micro-computed tomography (microCT) imaging to quantify myocardial infarct size in experimental mouse models. A total of 20 mice were imaged 5 or 35 days after surgical ligation of the left coronary artery or sham surgery (n=6 or 7 per group). We utilized a prototype microCT that covers a three-dimensional (3D) volume with an isotropic spatial resolution of 100 microm. A series of image acquisitions were started after a 200 microl bolus of a high-molecular-weight blood pool CT agent to outline the ventricles. CT imaging was continuously performed over 60 min, while an intravenous constant infusion with iopamidol 370 was started at a dosage of 1 ml/h. Thirty minutes after the initiation of this infusion, signal intensity in Hounsfield units was significantly higher in the infarct than in the remote, uninjured myocardium. Cardiac morphology and motion were visualized with excellent contrast and in fine detail. In vivo CT determination of infarct size at the midventricular level was in good agreement with ex vivo staining with triphenyltetrazolium chloride [5 days post-myocardial infarction (MI): r(2)=0.86, P<0.01; 35 days post-MI: r(2)=0.92, P<0.01]. In addition, we detected significant left ventricular remodeling consisting of left ventricular dilation and decreased ejection fraction. 3D cine microCT reliably and rapidly quantifies infarct size and assesses murine anatomy and physiology after coronary ligation, despite the small size and fast movement of the mouse heart. This efficient imaging tool is a valuable addition to the current phenotyping armamentarium and will allow rapid testing of novel drugs and cell-based interventions in murine models.

Duke Scholars

Published In

Am J Physiol Heart Circ Physiol

DOI

ISSN

0363-6135

Publication Date

June 2007

Volume

292

Issue

6

Start / End Page

H3172 / H3178

Location

United States

Related Subject Headings

  • Ventricular Remodeling
  • Ventricular Function, Left
  • Tomography, X-Ray Computed
  • Time Factors
  • Reproducibility of Results
  • Radiographic Image Interpretation, Computer-Assisted
  • Myocardial Infarction
  • Mice, Inbred C57BL
  • Mice
  • Ligation
 

Citation

APA
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ICMJE
MLA
NLM
Nahrendorf, M., Badea, C., Hedlund, L. W., Figueiredo, J.-L., Sosnovik, D. E., Johnson, G. A., & Weissleder, R. (2007). High-resolution imaging of murine myocardial infarction with delayed-enhancement cine micro-CT. Am J Physiol Heart Circ Physiol, 292(6), H3172–H3178. https://doi.org/10.1152/ajpheart.01307.2006
Nahrendorf, Matthias, Cristian Badea, Laurence W. Hedlund, Jose-Luiz Figueiredo, David E. Sosnovik, G Allan Johnson, and Ralph Weissleder. “High-resolution imaging of murine myocardial infarction with delayed-enhancement cine micro-CT.Am J Physiol Heart Circ Physiol 292, no. 6 (June 2007): H3172–78. https://doi.org/10.1152/ajpheart.01307.2006.
Nahrendorf M, Badea C, Hedlund LW, Figueiredo J-L, Sosnovik DE, Johnson GA, et al. High-resolution imaging of murine myocardial infarction with delayed-enhancement cine micro-CT. Am J Physiol Heart Circ Physiol. 2007 Jun;292(6):H3172–8.
Nahrendorf, Matthias, et al. “High-resolution imaging of murine myocardial infarction with delayed-enhancement cine micro-CT.Am J Physiol Heart Circ Physiol, vol. 292, no. 6, June 2007, pp. H3172–78. Pubmed, doi:10.1152/ajpheart.01307.2006.
Nahrendorf M, Badea C, Hedlund LW, Figueiredo J-L, Sosnovik DE, Johnson GA, Weissleder R. High-resolution imaging of murine myocardial infarction with delayed-enhancement cine micro-CT. Am J Physiol Heart Circ Physiol. 2007 Jun;292(6):H3172–H3178.

Published In

Am J Physiol Heart Circ Physiol

DOI

ISSN

0363-6135

Publication Date

June 2007

Volume

292

Issue

6

Start / End Page

H3172 / H3178

Location

United States

Related Subject Headings

  • Ventricular Remodeling
  • Ventricular Function, Left
  • Tomography, X-Ray Computed
  • Time Factors
  • Reproducibility of Results
  • Radiographic Image Interpretation, Computer-Assisted
  • Myocardial Infarction
  • Mice, Inbred C57BL
  • Mice
  • Ligation