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Titolo:
Comparison of harmonic and conventional power Doppler ultrasonography for assessment of slow flow in hyperechoic tissue - Experimental study using a Doppler phantom
Autore:
Kim, AY; Kim, TK; Kim, YH; Han, JK; Choi, BI;
Indirizzi:
Seoul Natl Univ, Coll Med, Dept Radiol, Seoul, South Korea Seoul Natl Univ Seoul South Korea Med, Dept Radiol, Seoul, South Korea Seoul Natl Univ, Coll Med, Inst Radiat Med, Seoul, South Korea Seoul Natl Univ Seoul South Korea , Inst Radiat Med, Seoul, South Korea
Titolo Testata:
INVESTIGATIVE RADIOLOGY
fascicolo: 2, volume: 35, anno: 2000,
pagine: 105 - 110
SICI:
0020-9996(200002)35:2<105:COHACP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
SONOGRAPHY; US; VASCULATURE; DEPICTION; ENERGY;
Keywords:
power Doppler ultrasonography; experimental study; harmonic power Doppler imaging;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Choi, BI Seoul Natl Univ Hosp, Dept Radiol, Chongno Gu, 28 Yongon Dong, Seoul 110744, South Korea Seoul Natl Univ Hosp 28 Yongon Dong Seoul South Korea 110744 rea
Citazione:
A.Y. Kim et al., "Comparison of harmonic and conventional power Doppler ultrasonography for assessment of slow flow in hyperechoic tissue - Experimental study using a Doppler phantom", INV RADIOL, 35(2), 2000, pp. 105-110

Abstract

RATIONALE AND OBJECTIVES. Despite the advantages of depicting slow flow insmall vessels, conventional power Doppler ultrasound (US) has a basic limitation, specifically that artifactual power Doppler signals mimic blood flow, especially in hyperechoic tissue. The purpose of this study was to compare harmonic power Doppler US with power Doppler US using a Doppler phantom under various parameter settings, focusing on the assessment of slow flow in the hyperechoic tissue. METHODS. While controlling the flow velocity (5 and 10 cm/s), pulse repetition frequency (500, 700, and 1000 Hz), wall filter (low and medium), and Doppler gain (90%, 96%, and 100%), the authors performed both harmonic Doppler US and power Doppler US by using a Doppler phantom/flow control system, We measured and compared the relative intensities of the Doppler signals (0-250 scale) in both the vessels and hyperechoic tissue-mimicking materials with the two different imaging modalities. RESULTS. Power Doppler US with any combination of the four parameters evaluated depict-ed strong flow signals (mean, 213) that were superior to harmonic Doppler US (mean, 61), Relatively strong artifactual signals within thehyperechoic tissue-mimicking materials were noted on all power Doppler US studies (mean, 106) but nearly none on harmonic Doppler US (mean, 3), The contrast-to-noise ratio of harmonic Doppler US was significantly greater than that of power Doppler US. CONCLUSIONS. Harmonic Doppler US is more useful in assessing slow flow in hyperechoic tissue than power Doppler US because it produces fewer artifactual Doppler signals originating from stationary hyperechoic tissues, which can be misjudged as true signals on power Doppler US.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 18:17:46