{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,5,13]],"date-time":"2024-05-13T00:04:27Z","timestamp":1715558667770},"reference-count":23,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Stroke"],"published-print":{"date-parts":[[1996,1]]},"abstract":"\n Background and Purpose<\/jats:italic>\n Power-based transcanial color-coded duplex sonography (p-TCCD) is a new ultrasonic method that has advantages compared with frequency-based TCCD (f-TCCD), since it is essentially independent of the angle of insonation, not subject to aliasing, and has a better signal-to-noise ratio. The purpose of this study was to evaluate the ability of p-TCCD to visualize flow in cerebral parenchyma and to compare the advantages, limitations, and reliability of velocity measurements of p-TCCD versus f-TCCD in the major basal cerebral arteries of normal subjects.\n <\/jats:p>\n \n Methods<\/jats:italic>\n Two investigators performed 15 p-TCCD and 15 f-TCCD studies in 30 normal subjects with adequate ultrasonic windows. Each investigator did a p-TCCD or f-TCCD study in every patient, and each was blinded in every case to the results of the other. Peak systolic (V\n s<\/jats:sub>\n ) and end-diastolic (V\n d<\/jats:sub>\n ) velocities were determined in the anterior, middle, and posterior cerebral, basilar, and vertebral arteries. The reliability of p-TCCD velocimetry was evaluated by calculating both the correlation coefficient (\n r<\/jats:italic>\n ) of the difference between p-TCCD versus f-TCCD measurements and the coefficient of variation (CV), defined as the difference between the mean values for p-TCCD and f-TCCD divided by the mean values for f-TCCD measurements, expressed as percent.\n <\/jats:p>\n \n Results<\/jats:italic>\n p-TCCD did not display flow in cerebral parenchyma but depicted arteries with a course perpendicular to that of the ultrasound beam and showed good reliability of velocity measurements in all examined arteries: for V\n s<\/jats:sub>\n ,\n r<\/jats:italic>\n was .84 to .93 (\n P<\/jats:italic>\n <.001) and CV was 7.7% to 10.8%; for V\n d<\/jats:sub>\n ,\n r<\/jats:italic>\n was .87 to .90 (\n P<\/jats:italic>\n <.001) and CV was 10.3% to 13.7%. The lack of directional and velocity information and tissue motion artifacts were unimportant limitations in p-TCCD.\n <\/jats:p>\n \n Conclusions<\/jats:italic>\n Compared with f-TCCD, p-TCCD had no important advantages but had several unimportant limitations in a study of normal adults with adequate ultrasonic windows.\n <\/jats:p>","DOI":"10.1161\/01.str.27.1.101","type":"journal-article","created":{"date-parts":[[2011,6,17]],"date-time":"2011-06-17T20:08:03Z","timestamp":1308341283000},"page":"101-104","update-policy":"http:\/\/dx.doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":19,"title":["Comparative Study of Power-Based Versus Mean Frequency-Based Transcranial Color-Coded Duplex Sonography in Normal Adults"],"prefix":"10.1161","volume":"27","author":[{"given":"Ralf W.","family":"Baumgartner","sequence":"first","affiliation":[{"name":"From the Departments of Neurology (R.W.B., C.S.) and Angiology (I.B.), University of Bern, Inselspital, Bern, Switzerland."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cornelia","family":"Schmid","sequence":"additional","affiliation":[{"name":"From the Departments of Neurology (R.W.B., C.S.) and Angiology (I.B.), University of Bern, Inselspital, Bern, Switzerland."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Iris","family":"Baumgartner","sequence":"additional","affiliation":[{"name":"From the Departments of Neurology (R.W.B., C.S.) and Angiology (I.B.), University of Bern, Inselspital, Bern, Switzerland."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"276","reference":[{"key":"e_1_3_1_1_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.21.12.2264074"},{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.23.11.1440705"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.25.2.7905680"},{"key":"e_1_3_1_4_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.23.9.1519283"},{"key":"e_1_3_1_5_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.192.3.8058946"},{"key":"e_1_3_1_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/0301-5629(91)90179-Z"},{"key":"e_1_3_1_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/0301-5629(91)90008-K"},{"key":"e_1_3_1_8_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.190.3.8115639"},{"key":"e_1_3_1_9_2","first-page":"676","volume":"23","year":"1993","unstructured":"Bogdahn U, Becker G, Schlief R, Reddig J, Hassel W. Contrast-enhanced transcranial color-coded real-time sonography. Stroke. 1993;23:676-684.","journal-title":"Stroke"},{"key":"e_1_3_1_10_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.26.2.203"},{"key":"e_1_3_1_11_2","doi-asserted-by":"publisher","DOI":"10.3171\/jns.1982.57.6.0769"},{"key":"e_1_3_1_12_2","doi-asserted-by":"publisher","DOI":"10.1016\/0301-5629(94)90063-9"},{"key":"e_1_3_1_13_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.19.11.3055444"},{"key":"e_1_3_1_14_2","first-page":"1903","volume":"24","year":"1994","unstructured":"Ries F, Honisch C, Lambertz M, Schlief R. A transpulmonary contrast medium enhances the transcranial Doppler signal in humans. Stroke. 1994;24:1903-1909.","journal-title":"Stroke"},{"key":"e_1_3_1_15_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.187.2.8475287"},{"key":"e_1_3_1_16_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiology.193.1.7916468"},{"key":"e_1_3_1_17_2","unstructured":"Fujioka KM Douville CM. Anatomy and freehand examination techniques. In: Newell DW Aaslid R eds. Transcranial Doppler. New York NY: Raven Press Publishers; 1992:9-31."},{"key":"e_1_3_1_18_2","unstructured":"Burns PN Powers JE Hope-Simpson D Uhlendorf V Fritzsch T. Power Doppler imaging combined with contrast-enhancing: new method for small vessel imaging. Radiology. 1994;193(suppl):366. Abstract."},{"key":"e_1_3_1_19_2","doi-asserted-by":"publisher","DOI":"10.1161\/str.24.9.8362422"},{"key":"e_1_3_1_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/0301-5629(90)90080-V"},{"key":"e_1_3_1_21_2","doi-asserted-by":"publisher","DOI":"10.7863\/jum.1990.9.7.403"},{"key":"e_1_3_1_22_2","doi-asserted-by":"publisher","DOI":"10.1038\/jcbfm.1987.40"},{"key":"e_1_3_1_23_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01577739"}],"container-title":["Stroke"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ahajournals.org\/doi\/full\/10.1161\/01.STR.27.1.101","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,5,12]],"date-time":"2024-05-12T22:21:12Z","timestamp":1715552472000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ahajournals.org\/doi\/10.1161\/01.STR.27.1.101"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1996,1]]},"references-count":23,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1996,1]]}},"alternative-id":["10.1161\/01.STR.27.1.101"],"URL":"https:\/\/doi.org\/10.1161\/01.str.27.1.101","relation":{},"ISSN":["0039-2499","1524-4628"],"issn-type":[{"value":"0039-2499","type":"print"},{"value":"1524-4628","type":"electronic"}],"subject":[],"published":{"date-parts":[[1996,1]]},"assertion":[{"value":"1995-06-22","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"1995-10-10","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"1996-01-01","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}