{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,4]],"date-time":"2025-10-04T12:24:34Z","timestamp":1759580674020},"reference-count":12,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2016,2,4]],"date-time":"2016-02-04T00:00:00Z","timestamp":1454544000000},"content-version":"vor","delay-in-days":6243,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Neuroimaging"],"published-print":{"date-parts":[[1999,1]]},"abstract":"<jats:p>The authors examined the efficacy of a 1\u2010MHz transducer in routine ultrasound monitoring. Fifty outpatients (34 women, 16 men; mean age, 65 \u00b1 2) with inadequate temporal bone window for examination with 2\u2010MHz transducers were re\u2010examined with a 1\u2010MHz transducer. Additionally, 50 controls (34 men, 16 women; mean age 49 \u00b1 2) with adequate temporal bone window were examined with both the 1\u2010 and 2\u2010MHz transducers. Signal quality was classified as good (GQ), adequate (AQ), or poor (PQ). Finally, 30 normal controls were examined with both transducers under standardized conditions, to evaluate potential differences in velocity measurements. A total of 90 temporal windows were lacking in the 50 patients. Use of the 1\u2010MHz transducer resulted in identification of the middle cerebral artery in 68 cases (76%; PQ, <jats:italic>n<\/jats:italic>=13; AQ, <jats:italic>n<\/jats:italic>=29; GQ, <jats:italic>n<\/jats:italic>=26), the anterior cerebral artery in 51 cases (57%; PQ, <jats:italic>n<\/jats:italic>=23; AQ, <jats:italic>n<\/jats:italic>=17; GQ, <jats:italic>n<\/jats:italic>=11) and the posterior cerebral artery in 46 cases (51%; PQ, <jats:italic>n<\/jats:italic>=12; AQ, <jats:italic>n<\/jats:italic>=21; GQ, <jats:italic>n<\/jats:italic>=13). Examination was feasible with both transducers in the 50 controls, with minimal differences in signal quality between the two transducers. Correlation between velocity values acquired with the 1\u2010 and 2\u2010MHz transducers was significant for all vessels examined. Best values were measured for the middle cerebral artery, followed by the anterior cerebral artery and posterior cerebral artery. The authors conclude that the use of the 1\u2010MHz transducer increases the yield of transcranial Doppler sonography.<\/jats:p>","DOI":"10.1111\/jon19999115","type":"journal-article","created":{"date-parts":[[2016,2,8]],"date-time":"2016-02-08T10:09:50Z","timestamp":1454926190000},"page":"15-18","source":"Crossref","is-referenced-by-count":4,"title":["Diagnostic Yield of a 1\u2010MHz Transducer in Evaluation of the Basal Cerebral Arteries"],"prefix":"10.1111","volume":"9","author":[{"given":"D","family":"Georgiadis","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R","family":"Karatschai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F","family":"Uhlmann","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A","family":"Lindner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2016,2,4]]},"reference":[{"issue":"2","key":"e_1_2_1_2_1","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1161\/str.19.2.274a","article-title":"A reason for failure to obtain transcranial Doppler flow signals. Hyperostosis of the skull","volume":"19","author":"Bruno A","year":"1988","journal-title":"Stroke"},{"issue":"16","key":"e_1_2_1_3_1","first-page":"635","article-title":"Castle WM. Skull thickness of black and white races","volume":"50","author":"Ross MD","year":"1976","journal-title":"S Afr Med J"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1161\/01.STR.24.8.1192"},{"issue":"2","key":"e_1_2_1_5_1","first-page":"112","article-title":"Transcranial pulsed Doppler. 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