Title

Quantitative evaluation of C-arm CT cerebral blood volume in a canine model of ischemic stroke

UMMS Affiliation

Department of Radiology; New England Center for Stroke Research

Date

2-1-2012

Document Type

Article

Disciplines

Neurology | Radiology

Abstract

BACKGROUND AND PURPOSE: Previous studies have shown the feasibility of assessing qualitative CBV measurements in the angiography suite by using FPD-CBCT systems. We have investigated the correlation of FPD-CBCT CBV lesion volumes to the infarct volume.

MATERIALS AND METHODS: Unilateral strokes were created in 7 adult dogs. MR imaging and FPD-CBCT data were obtained after MCA occlusion. FPD-CBCT CBV and ADC maps were generated for all subjects. The animals were sacrificed immediately following the last imaging study to measure infarct volume on histology. The reliability of FPD-CBCT-based lesion volume measurements was compared with those measured histologically by using regression and Bland-Altman analysis.

RESULTS: The best correlation (R(2) = 0.72) between lesion volumes assessed with FPD-CBCT and histology was established with a threshold of mean healthy CBV - 2.5 x SD. These results were inferior to the correlation of lesion volumes measured with ADC and histology (R(2) = 0.99). Bland-Altman analysis showed that the agreement of ADC-derived lesion volumes with histology was superior to the agreement of FPD-CBCT-derived lesion volumes with histology.

CONCLUSIONS: We correlated FPD-CBCT measurements of CBV and MR ADC lesion volumes with histologically assessed infarct volume. As expected, ADC is a very accurate and precise method for determining the extent of infarction. FPD-CBCT CBV lesion volumes are correlated to the size of the infarct. Improvement of FPD-CBCT image quality provides an opportunity to establish quantitative CBV measurement in the angiography suite.

Rights and Permissions

Citation: AJNR Am J Neuroradiol. 2012 Feb;33(2):353-8. Epub 2011 Dec 15. Link to article on publisher's site

Related Resources

Link to Article in PubMed

PubMed ID

22173756