Incidence of unilateral distal vertebral artery aplasia: evaluation by combining basiparallel anatomic scanning-magnetic resonance imaging (BPAS-MRI) and magnetic resonance angiography
| Autor: | Kiyoshi Basaki, Hiroyuki Miura, Shuichi Ono, Fumiyasu Tsushima, Seiyu Uno, Yoshinao Abe, Kohei Morimoto, Shinya Kakehata, Hiroko Seino, Morio Nagahata |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Male medicine.medical_specialty Vertebral artery Arterial Occlusive Diseases Asymptomatic Magnetic resonance angiography medicine.artery medicine Humans Radiology Nuclear Medicine and imaging Vertebral Artery Aged Retrospective Studies medicine.diagnostic_test business.industry Incidence (epidemiology) Incidence Magnetic resonance imaging Aplasia Middle Aged medicine.disease Magnetic Resonance Imaging Female Radiology Mr images medicine.symptom business Magnetic Resonance Angiography Cerebral angiography |
| Zdroj: | Japanese journal of radiology. 27(3) |
| ISSN: | 1867-1071 |
| Popis: | The incidence of a unilateral aplastic distal vertebral artery (VA) has been reported as 0.2% of cases on cerebral angiography. During our daily magnetic resonance (MR) examinations, however, we frequently encounter MR angiograms (MRAs) that do not demonstrate unilateral VA. The purpose of this study was to calculate the frequency of aplastic unilateral distal VA by MR images performed for asymptomatic people.Over a time span of 1 year, 237 asymptomatic people (140 men, 97 women; ages 28-67 years, mean 54.4 years) underwent brain MRI during a "brain check-up examination" in our hospital. To identify an aplastic unilateral distal VA, we retrospectively compared three-dimensional time-of-flight MRA with basiparallel anatomic scanning (BPAS)-MRI which was designed for recognition of the arterial outer contour.Aplasia of the unilateral distal VA was confirmed in 11 persons (4.6%). According to our classification, hypoplastic distal VA in 12 (5.1%) and asymptomatic acquired unilateral distal VA occlusion was also proved in 2 (0.8%).We found that the frequency of aplastic unilateral VA was 4.6% in asymptomatic people using a combination of MRA and BPAS-MRI for assessment of an intracranial VA. |
| Databáze: | OpenAIRE |
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