| Autor: |
Schad, L.R., Gamroth, A.H., Wacker, C.M., Irngartinger, G., Kaick, G. van, Lorenz, W.J., Gehling, U., Müller, E. |
| Zdroj: |
Zeitschrift für Medizinische Physik; January 1993, Vol. 3 Issue: 3 p133-140, 8p |
| Abstrakt: |
The quantitative estimation of pulmonary hemodynamics is of clinical interest in various benign and malignant diseases of the lungs, especially in cases of preoperative planning of parenchymal resections and/or pulmonary arterial hypertension. In a comparative clinical study with 30 patients MR velocity measurements in the pulmonary arteries (main, right and left) were performed by the RACE-technique at 1.5 T. MR data were correlated (a) with the results of perfusion scintigraphy, (b) with pw-US doppler echo-cardiography, and (c) with right heart catheterization. MR-RACE showed good results for quantification of the relative right to left pulmonary arterial flow but was not able to indicate the correct absolute flow related to the results of right heart catheterization. Most probably this is due to interferences by overlapping vessels which are unavoidable in a projection technique. Better correlation with right heart catheterization can be expected using a two dimensional MR technique (e.g. „PHASE-MAPPING” or „PHASE-CONTRAST”) in patients without cardiac arrhythmias. |
| Databáze: |
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