| Pitfalls in the display of color Doppler jet areas: combined variability due to Doppler angle, frame rate, and scanning direction. | |
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MedLine Citation:
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PMID: 10149216 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The Doppler color jet area depicting a regurgitant or shunt lesion may be useful in estimating its severity. However, color jet area may be affected by technical factors. We studied the combined effects of Doppler angle, frame rate, and scanning direction on the Doppler color jet area of a free jet with 10-mL injection. Results: (1) Angle effects: color flow area was 11.7 +/- 2.0 cm2 at a Doppler angle of 20 degrees , and 2.3 +/- 1.2 cm2 at an angle of 60 degrees , when other parameters were kept constant (frame rate = 12 frames/sec, reverse scanning direction). (2) Frame rate effects: with other parameters kept constant (Doppler angle = 20 degrees , reverse scanning direction), color flow area was 11.7 +/- 2.0 cm2 at a rate of 12 frames/sec and 6.5 +/- 1.8 cm2 at 6 frames/sec. (3) Scanning direction effects: with other parameters kept constant (Doppler angle = 20 degrees , frame rate = 9 frames/sec), color flow area was 7.3 +/- 1.1 cm2 with scanning in the reverse direction, and 20.5 +/- 1.6 cm2 with scanning in the forward direction. (4) Combined effects: In our in vitro studies, the maximum color flow area was 20.5 +/- 1.6 cm2, and the minimum area was 1.5 +/- 0.2 cm2 (nearly twelve-fold). Conclusions: Doppler color jet area correlated inversely with Doppler angle (P less than 0.01) and directly with frame rate (P < 0.01).(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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T Utsunomiya; T Ogawa; S W King; E Sunada; S M Lobodzinski; W L Henry; J M Gardin |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Echocardiography (Mount Kisco, N.Y.) Volume: 7 ISSN: 0742-2822 ISO Abbreviation: Echocardiography Publication Date: 1990 Nov |
Date Detail:
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Created Date: 1992-08-27 Completed Date: 1992-08-27 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8511187 Medline TA: Echocardiography Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 739-45 Citation Subset: T |
Affiliation:
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Department of Medicine, University of California, Irvine. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Echocardiography, Doppler*
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instrumentation,
methods,
standards Equipment Failure Evaluation Studies as Topic Hemodynamics Humans Image Processing, Computer-Assisted Mitral Valve Insufficiency / ultrasonography Models, Cardiovascular Sensitivity and Specificity Ultrasonics* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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