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An initial evaluation of analyser-based phase-contrast X-ray imaging of carotid plaque microstructure.
- Source :
-
British Journal of Radiology . Jan2013, Vol. 86 Issue 1021, p1-6. 6p. - Publication Year :
- 2013
-
Abstract
- Carotid artery plaque instability can result in rupture and lead to ischaemic stroke. Stability of plaques appears to be a function of composition. Current non- invasive imaging techniques are limited in their ability to classify distinct histological regions within plaques. Phase-contrast (PC) X-ray imaging methods are an emerging class of techniques that have shown promise for identifying soft-tissue features without use of exogenous contrast agents. This is the first study to apply analyser-based X-ray PC imaging in CT mode to provide three-dimensional (3D) images of excised atherosclerotic plaques. The results provide proof of principle for this technique as a promising method for analysis of carotid plaque microstructure. Multiple image radiography CT (MIR-CT), a tomographic implementation of X-ray PC imaging that employs crystal optics, was employed to image excised carotid plaques. MIR-CT imaging yields three complementary images of the plaque's 3D X-ray absorption, refraction and scatter properties. These images were compared with histological sections of the tissue. X-ray PC images were able to identify the interface between the plaque and the medial wall. In addition, lipid-rich and highly vascularized regions were visible in the images as well as features depicting inflammation. This preliminary research shows MIR-CT imaging can reveal details about plaque structure not provided by traditional absorption-based X-ray imaging and appears to identify specific histological regions within plaques. This is the first study to apply analyser-based X-ray PC imaging to human carotid artery plaques to identify distinct soft-tissue regions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00071285
- Volume :
- 86
- Issue :
- 1021
- Database :
- Academic Search Index
- Journal :
- British Journal of Radiology
- Publication Type :
- Academic Journal
- Accession number :
- 85242045
- Full Text :
- https://doi.org/10.1259/bjr.20120318