743-3 Initial Quantitative Application of Three-dimensional Voxel Imaging with a Rotating Transducer to the Human Right Ventricle
| Autor: | Stella Brili, Mark D. Handschumacher, Arthur E. Weyman, Leng Jiang, Richard M. Derman, Robert A. Levine, Mary Etta King, Michael J.A. Williams, Myung-Yong Lee, Dan Gilon |
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| Rok vydání: | 1995 |
| Předmět: |
Cardiac output
medicine.medical_specialty business.industry Echo (computing) Stroke volume computer.software_genre Surgery Data set symbols.namesake medicine.anatomical_structure Ventricle Parasternal line Voxel medicine symbols Nuclear medicine business Cardiology and Cardiovascular Medicine Doppler effect computer |
| Zdroj: | Journal of the American College of Cardiology. 25(2):184A-185A |
| ISSN: | 0735-1097 |
| DOI: | 10.1016/0735-1097(95)92226-u |
| Popis: | Three-dimensional echo measurement of right ventricular (RV) volume has recently been validated in experimental models using automated voxel acquisition from rotated 2D echo views. This technique conveniently provides rapid and animated spatial appreciation from multiple perspectives. However, its feasibility and reliability for reconstructing and quantitating RV volume and function in humans is not known, given limitations of acoustic access and the need for ECG and respiratory gating; also, no other method for RV volume by 3D echo has been tested quantitatively in patients. We therefore imaged the RV from a parasternal or subcostal rotation in 18 normal subjects (6–19 years old) in order to compare calculated stroke volumes with an independent noninvasive measure in subjects not undergoing catheterization. Endocardial borders in parallel cross-sections derived from the voxel data set were traced and volumes calculated as σ (cavity area x slice height). Stroke volumes were compared with Doppler values (mean of mitral inflow and aortic outflow in the absence of regurgitation). Results In 13/18 (72%) of subjects, the inflow, outflow and apical portions of the RV could be included in a rotational scan. In these individuals, 3D echo visually reproduced the crescentic RV shape, and 3D stroke volumes agreed well with Doppler values (y = 0.87x + 1.1, r = 0.95, SEE = 5.1 ml. mean error = -5.7 ml, related to mild apical foreshortening). Conclusions 3D volumetric reconstruction using a rotating transducer can be applied to the human RV and provides convenient gated acquisition and ready spatial appreciation from multiple perspectives, subject to the need for visualizing the RV from a fixed point. It is also quantitatively accurate for RV stroke volume and therefore cardiac output by the transthoracic approach. |
| Databáze: | OpenAIRE |
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