μCT imaging of a multi-organ vascular fingerprint in rats

PLoS One. 2024 Oct 14;19(10):e0308601. doi: 10.1371/journal.pone.0308601. eCollection 2024.

Abstract

The importance of microvascular imaging in diagnosis and therapeutic targeting of various diseases is increasingly recognized. The new approach emphasizes the need for holistic studies to understand the inter-organ vascular cross-talk. Here, we report on the development of a novel perfusion protocol which consistently delivers a micro-computed tomography contrast agent to micro-vessels of multiple organs in a single experimental animal. We describe the achieved repeatability of the perfusions, as well as the image analysis steps developed individually for each organ type. We also optimize image acquisition by investigating the compromise between shortening of the scanning time and preservation of the highest possible spatial resolution. Taking together, with the multi-organ perfusion, optimized image acquisition, and the conceived image analysis steps, we provide a comprehensive and reliable experimental protocol for studying vascular morphology and pathology in multi-organ diseases.

MeSH terms

  • Animals
  • Contrast Media
  • Image Processing, Computer-Assisted / methods
  • Male
  • Microvessels / diagnostic imaging
  • Rats
  • Rats, Sprague-Dawley
  • X-Ray Microtomography* / methods

Substances

  • Contrast Media

Grants and funding

Funding for this work was provided by the PostDoc Start-up Grant from the German Center for Cardiovascular Research (DZHK, 81X3100109) to KK, BIH & MDC Focus Area Translational Vascular Biomedicine to KK & RD, Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK 81Z0100106) to DNM, the German Ministry of Education and Research (BMBF) (TAhRget consortium; Foerderkennzeichen 01EJ2202D) to DNM and the ERA-CVD Grant for Early Career Scientists awarded to NH, and Foerderkennzeichen HyperDiP consortium (01KL1911) to NH. Authors were also supported by the German Research Foundation (DFG): (DE631/15-1) to RD, (SFB 1365 (A01)) to DNM, (SFB 1470 (A06)) to DNM & (SFB 1470 (A05)) to RD. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.