Assessment of extracranial-intracranial bypass in Moyamoya disease using 3T time-of-flight MR angiography: comparison with CT angiography. 2014

Qian Chen, and Rongfeng Qi, and Xiaoqing Cheng, and Changsheng Zhou, and Song Luo, and Ling Ni, and Wei Huang
Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.

BACKGROUND To evaluate the value of time-of-flight MR angiography (TOF MRA) for the assessment of extracranial-intracranial (EC-IC) bypass in Moyamoya disease in comparison with computed tomography angiography (CTA). METHODS A consecutive series of 23 patients with Moyamoya disease were analyzed retrospectively. Twenty three patients underwent 25 procedures of extracranial-intracranial bypass. Cranial CTA was performed within one week after the surgery to assess bypass patency. Then TOF MRA was scanned within 24 h after CTA on a 3T MRI system. Using 5-point scales (0 = poor to 4 = excellent), two radiologists rated the image quality and vessel integrity of bypass for three segments (extracranial, trepanation, intracranial). RESULTS Image quality was high in both CTA and TOF MRA (mean quality score 3.84 ± 0.37 and 3.8 ± 0.41), without statistical difference (p = 0.66). Mean scores of TOF MRA with respect to bypass visualization were higher than CTA in the intracranial segment (p = 0.026). No significant difference of bypass visualization regarding the extracranial and trepanation segments was found between TOF MRA and CTA (p = 0.66 and p = 0.34, respectively). For the trepanation segment, TOF MRA showed pseudo lesions in 2 of all 25 cases. CONCLUSIONS 3T TOF MRA, a non-contrast technique not exposing the patients to radiation, proved to be at least equal to CTA for the assessment of EC-IC bypass, and even superior to CTA with respect to the intracranial segment. In addition, readers should be aware of a potential overestimation showing focal pseudo lesions of the bypass at the trepanation segment in TOF MRA.

UI MeSH Term Description Entries
D008297 Male Males
D009072 Moyamoya Disease A noninflammatory, progressive occlusion of the intracranial CAROTID ARTERIES and the formation of netlike collateral arteries arising from the CIRCLE OF WILLIS. Cerebral angiogram shows the puff-of-smoke (moyamoya) collaterals at the base of the brain. It is characterized by endothelial HYPERPLASIA and FIBROSIS with thickening of arterial walls. This disease primarily affects children but can also occur in adults. Cerebrovascular Moyamoya Disease,Progressive Intracranial Occlusive Arteropathy (Moyamoya),Moya-Moya Disease,Moyamoya Disease, Classic,Moyamoya Disease, Primary,Moyamoya Disease, Secondary,Moyamoya Syndrome,Classic Moyamoya Disease,Disease, Classic Moyamoya,Disease, Moya-Moya,Disease, Primary Moyamoya,Moya Moya Disease,Moyamoya Diseases, Primary,Primary Moyamoya Disease,Primary Moyamoya Diseases,Secondary Moyamoya Disease
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D011857 Radiographic Image Interpretation, Computer-Assisted Computer systems or networks designed to provide radiographic interpretive information. Computer Assisted Radiographic Image Interpretation,Computer-Assisted Radiographic Image Interpretation,Radiographic Image Interpretation, Computer Assisted
D002533 Cerebral Angiography Radiography of the vascular system of the brain after injection of a contrast medium. Angiography, Cerebral,Angiographies, Cerebral,Cerebral Angiographies
D002536 Cerebral Arteries The arterial blood vessels supplying the CEREBRUM. Arteries, Cerebral,Artery, Cerebral,Cerebral Artery
D002548 Cerebral Revascularization Microsurgical revascularization to improve intracranial circulation. It usually involves joining the extracranial circulation to the intracranial circulation but may include extracranial revascularization (e.g., subclavian-vertebral artery bypass, subclavian-external carotid artery bypass). It is performed by joining two arteries (direct anastomosis or use of graft) or by free autologous transplantation of highly vascularized tissue to the surface of the brain. Brain Revascularization,EC-IC Arterial Bypass,Extracranial-Intracranial Arterial Bypass,Microsurgical Revascularization, Cerebral,STA-MCA Bypass,Cerebral Microsurgical Revascularization,Arterial Bypass, EC-IC,Arterial Bypass, Extracranial-Intracranial,Arterial Bypasses, EC-IC,Arterial Bypasses, Extracranial-Intracranial,Bypass, EC-IC Arterial,Bypass, Extracranial-Intracranial Arterial,Bypass, STA-MCA,Bypasses, EC-IC Arterial,Bypasses, Extracranial-Intracranial Arterial,Bypasses, STA-MCA,Cerebral Microsurgical Revascularizations,EC IC Arterial Bypass,EC-IC Arterial Bypasses,Extracranial Intracranial Arterial Bypass,Extracranial-Intracranial Arterial Bypasses,Revascularization, Brain,Revascularization, Cerebral,Revascularization, Cerebral Microsurgical,STA MCA Bypass,STA-MCA Bypasses
D002560 Cerebrovascular Circulation The circulation of blood through the BLOOD VESSELS of the BRAIN. Brain Blood Flow,Regional Cerebral Blood Flow,Cerebral Blood Flow,Cerebral Circulation,Cerebral Perfusion Pressure,Circulation, Cerebrovascular,Blood Flow, Brain,Blood Flow, Cerebral,Brain Blood Flows,Cerebral Blood Flows,Cerebral Circulations,Cerebral Perfusion Pressures,Circulation, Cerebral,Flow, Brain Blood,Flow, Cerebral Blood,Perfusion Pressure, Cerebral,Pressure, Cerebral Perfusion
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D005260 Female Females

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