BACKGROUND AND PURPOSE: The importance of MR imaging in carotid artery disease is unclear. We evaluated the sensitivity and specificity of the high signal intensity changes on MR images for diagnosis of hemodynamically compromised unilateral internal carotid artery disease. METHODS: We evaluated the association of high signal intensities on T2-weighted MR images with changes in cerebral perfusion reserve measured using 99mTc-hexamethylpropyleneamine oxime single-photon emission CT and acetazolamide in 23 patients. RESULTS: Eleven patients had a type I response (normal flow and normal perfusion reserve), 8 patients had a type II response (normal flow and decreased perfusion reserve), and 4 patients had a type III response (decreased flow and decreased perfusion reserve). High signal intensities in the centrum semiovale (11/12) and/or posterior periventricular white matter (6/12) were frequently seen in the hemodynamically compromised groups. Extensive high signal intensities were associated with severely impaired cerebral circulation. MR imaging had high sensitivity (0.92) and specificity (1.0) in predicting hemodynamically compromised patients when we used the presence of T2 high intensity in the centrum semiovale as a criterion. CONCLUSIONS: The centrum semiovale T2 hyperintensities lateralized to the side of carotid occlusion are specific and sensitive for the presence and severity of hemodynamic compromise from carotid occlusive disease.
BACKGROUND AND PURPOSE: The importance of MR imaging in carotid artery disease is unclear. We evaluated the sensitivity and specificity of the high signal intensity changes on MR images for diagnosis of hemodynamically compromised unilateral internal carotid artery disease. METHODS: We evaluated the association of high signal intensities on T2-weighted MR images with changes in cerebral perfusion reserve measured using 99mTc-hexamethylpropyleneamine oxime single-photon emission CT and acetazolamide in 23 patients. RESULTS: Eleven patients had a type I response (normal flow and normal perfusion reserve), 8 patients had a type II response (normal flow and decreased perfusion reserve), and 4 patients had a type III response (decreased flow and decreased perfusion reserve). High signal intensities in the centrum semiovale (11/12) and/or posterior periventricular white matter (6/12) were frequently seen in the hemodynamically compromised groups. Extensive high signal intensities were associated with severely impaired cerebral circulation. MR imaging had high sensitivity (0.92) and specificity (1.0) in predicting hemodynamically compromised patients when we used the presence of T2 high intensity in the centrum semiovale as a criterion. CONCLUSIONS: The centrum semiovale T2 hyperintensities lateralized to the side of carotid occlusion are specific and sensitive for the presence and severity of hemodynamic compromise from carotid occlusive disease.
Authors: Viktor Švigelj; Matjaž Šinkovec; Viktor Avbelj; Roman Trobec; Ludovit Gaspar; Daniel Petrovič; Peter Kruzliak Journal: Wien Klin Wochenschr Date: 2016-03-15 Impact factor: 1.704
Authors: J H Kim; S J Lee; T Shin; K H Kang; P Y Choi; J H Kim; J C Gong; N C Choi; B H Lim Journal: AJNR Am J Neuroradiol Date: 2000-09 Impact factor: 3.825
Authors: Adriaan C G M van Es; Jeroen van der Grond; V Hester ten Dam; Anton J M de Craen; Gerard J Blauw; Rudi G J Westendorp; Faiza Admiraal-Behloul; Mark A van Buchem Journal: PLoS One Date: 2010-03-23 Impact factor: 3.240