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Titolo:
Power Doppler US: Evaluation of the morphology of stenoses with a flow phantom
Autore:
Claudon, M; Winninger, D; Briancon, S; Pesque, P;
Indirizzi:
Hosp Brabois, Dept Radiol, F-54511 Vandoeuvre Nancy, France Hosp Brabois Vandoeuvre Nancy France F-54511 11 Vandoeuvre Nancy, France Univ Nancy, Dept Tech Assistance, Nancy, France Univ Nancy Nancy FranceUniv Nancy, Dept Tech Assistance, Nancy, France Univ Nancy, Dept Stat, Nancy, France Univ Nancy Nancy FranceUniv Nancy, Dept Stat, Nancy, France Adv Technol Labs, Dept Res & Dev, Bothell, WA USA Adv Technol Labs Bothell WA USA ol Labs, Dept Res & Dev, Bothell, WA USA
Titolo Testata:
RADIOLOGY
fascicolo: 1, volume: 218, anno: 2001,
pagine: 109 - 117
SICI:
0033-8419(200101)218:1<109:PDUEOT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERNAL CAROTID-ARTERY; COLOR; SONOGRAPHY; MODE; ANGIOGRAPHY; VASCULATURE; ULTRASOUND; DEPICTION; ENERGY; VOLUME;
Keywords:
blood, flow dynamics; blood vessels, stenosis or obstruction; blood vessels, US; phantoms; ultrasound (US), experimental studies; ultrasound (US), power Doppler studies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Claudon, M Hosp Brabois, Dept Radiol, Rue Morvan, F-54511 Vandoeuvre Nancy, France Hosp Brabois Rue Morvan Vandoeuvre Nancy France F-54511 France
Citazione:
M. Claudon et al., "Power Doppler US: Evaluation of the morphology of stenoses with a flow phantom", RADIOLOGY, 218(1), 2001, pp. 109-117

Abstract

PURPOSE: To determine the importance of technical settings at power Doppler ultrasonography (US) for the evaluation of stenoses. MATERIALS AND METHODS: A computer-controlled phantom was used to induce a reproducible flow across a calibrated 71% stenosis in an 8.4-mm-diameter tube. Two transducers, 2-4 and 5-10 MHz, working at depths of 3.0 and 11.5 cm, respectively, with different beam angles (40 degrees, 60 degrees, and 90 degrees), were used to simulate evaluation of pulsatile flow across normal and stenotic vessels in various renditions. For each condition, gain, pulserepetition frequency, and wall filter were progressively turned from low to high values. Two observers measured in a blinded fashion the apparent lumen of the stenotic and normal vessels on longitudinal and transverse imageswith the use of power Doppler US. RESULTS: When the high-frequency transducer was used, gain significantly affected both stenotic and feeding vessel measurement, whereas pulse repetition frequency and filter only affected feeding vessel evaluation. When the low-frequency transducer was used, all factors, including flow velocity andbeam angle, played a significant role (P < .001). In most conditions, overestimation of the lumen and underestimation of the lumen of the feeding vessel led to severe underestimation of the degree of stenosis. CONCLUSION: Power Doppler US cannot be used to measure stenoses accurately. Underestimation of the degree of the stenosis was significantly higher with the low-frequency probe than with the high-frequency probe.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 20:10:02