The investigation of micro-vessel dimensions in 3D is currently problematic due to their complex structures and fine scale. Quantification of vascular parameters is important in several fields of biomedicine; including embryogenesis, wound healing, diseases characterized by uncontrolled angiogenesis (e.g. tumor growth and metastasis) and the development of implantable bio-materials where a functional vascular supply is critical to their successful integration into host tissue. However, techniques that can resolve the micron-scaled features of these capillary beds, such as scanning electron and confocal microscopy, do not allow for total image reconstitution in 3 D in thick tissue samples . The present study describes the use of an in vivo corrosion casting technique that provides a stable replica of the microvascular network and the subsequent evaluation of three different mu CT systems in order to accurately quantify vessel dimensions. Stable replicas of micro-vascular networks in neonatal mouse eyes were first created using in vivo vascular corrosion casting and then imaged using a unique, laboratory scale, mu CT unit. This system combines a LaB6 cathode with high-performance electron optics to obtain a high resolution x-ray source. Novel image analysis was then applied to the reconstructions to quantify the morphological parameters of the hyaloid vascular plexi in the developing eyes of postnatal day 2 (P2) wild-type mice. These results are compared to synchrotron scans, establishing vascular casting and x-ray mu CT as a valid laboratory scale experimental method for accurate 3D quantification of the microvasculature, with potential applications to a wide variety of fields in biological and medical research.
|Name||PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)|
|Publisher||SPIE digital library|
|Conference||DEVELOPMENTS IN X-RAY TOMOGRAPHY VI|
|Period||1/01/08 → …|
6h Conference on Developments in X-Ray Tomography, San Diego, CA, AUG 12-14, 2008