Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-27024

Hintermüller, C; Coats, J S; Obenaus, A; Nelson, G; Krucker, T; Stampanoni, M (2009). 3D quantification of brain microvessels exposed to heavy particle radiation. Journal of Physics: Conference Series, 186(1):012087.

[img]
Preview
PDF (Verlags-PDF)
2MB

Abstract

Space radiation with high energy particles and cosmic rays presents a significant hazard to spaceflight crews. Recent reviews of the health risk to astronauts from ionizing radiation concluded to establish a level of risk which may indicate the possible performance decrements and decreased latency of late dysfunction syndromes (LDS) of the brain. A hierarchical imaging approach developed at ETH Zürich and PSI, which relies on synchrotron based X-ray Tomographic Microscopy (SRXTM), was used to visualize and analyze 3D vascular structures down to the capillary level in their precise anatomical context. Various morphological parameters, such as overall vessel volume, vessel thickness and spacing, are extracted to characterize the vascular structure within a region of interest. For a first quantification of the effect of high energy particles on the vasculature we scanned a set of 6 animals, all of same age. The animals were irradiated with 1 Gy, 2 Gy and 4 Gy of 600MeV 56Fe heavy particles simulating the space radiation environment. We found that with increasing dose the diameter of vessels and the overall vessel volume are decreased whereas the vessel spacing is increased. As these parameters reflect blood flow in three-dimensional space they can be used as indicators for the degree of vascular efficiency which can have an impact on the function and development of lung tissue or tumors.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Biomedical Engineering
DDC:170 Ethics
610 Medicine & health
Language:English
Date:2009
Deposited On:15 Jan 2010 13:20
Last Modified:20 Dec 2013 11:56
Publisher:Institute of Physics Publishing
ISSN:1742-6588
Publisher DOI:10.1088/1742-6596/186/1/012087
Citations:Web of Science®
Google Scholar™

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page