Pitfalls in Doppler Evaluation of Diastolic Function: Insights from 3-Dimensional Magnetic Resonance Imaging
| Autor: | Ann F. Bolger, Matts Karlsson, Tino Ebbers, Lars Wigström, B. Wranne, K.Peter Öhman, Anna Fyrenius, Jan Engvall |
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| Rok vydání: | 1999 |
| Předmět: |
Adult
Male medicine.medical_specialty Offset (computer science) Diastole Image processing Inflow symbols.namesake Nuclear magnetic resonance Image Processing Computer-Assisted Humans Medicine Radiology Nuclear Medicine and imaging Sensitivity (control systems) Analysis of Variance Chi-Square Distribution medicine.diagnostic_test business.industry Magnetic resonance imaging Middle Aged Magnetic Resonance Imaging Myocardial Contraction Echocardiography Doppler Color medicine.anatomical_structure Ventricle Hypertension symbols Female Radiology Cardiology and Cardiovascular Medicine business Doppler effect |
| Zdroj: | Journal of the American Society of Echocardiography. 12:817-826 |
| ISSN: | 0894-7317 |
| DOI: | 10.1016/s0894-7317(99)70186-0 |
| Popis: | Ultrasound-Doppler assessment of diastolic function is subject to velocity errors caused by angle sensitivity and a fixed location of the sample volume. We used 3-dimensional phase contrast magnetic resonance imaging (MRI) to evaluate these errors in 10 patients with hypertension and in 10 healthy volunteers. The single (Doppler) and triple (MRI) component velocity was measured at early (E) and late (A) inflow along Doppler-like sample lines or 3-dimensional particle traces generated from the MRI data. Doppler measurements underestimated MRI velocities by 9.4% +/- 8.6%; the effect on the E/A ratio was larger and more variable. Measuring early and late diastolic inflows from a single line demonstrated the error caused by their 3-dimensional spatial offset. Both errors were minimized by calculating the E/A ratio from maximal E and A values without constraint to a single line. Alignment and spatial offset are important sources of error in Doppler diastolic parameters. Improved accuracy may be achieved with the use of maximal E and A velocities from wherever they occur in the left ventricle. |
| Databáze: | OpenAIRE |
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