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Two-dimensional echocardiographic imaging: in vitro comparison of conventional and dynamically focused annular array
R Pini1, L Ferrucci, M Di Bari
1Division of Cardiology, New York Hospital-Cornell Medical Center, NY 10021.
Ultrasound in Medicine & Biology
|October 1, 1987
Summary
New echocardiography technology improves accuracy in measuring cardiac chamber sizes. Dynamically focused transducers provide more precise measurements of left ventricular (LV) cavity areas compared to conventional methods.
Area of Science:
- Cardiovascular Imaging
- Echocardiography
- Medical Ultrasound Technology
Background:
- Quantitative two-dimensional echocardiography (2D echo) often underestimates cardiac chamber cross-sectional areas.
- Advances in imaging technology may offer solutions to this underestimation problem.
Purpose of the Study:
- To evaluate if newer echocardiographic imaging technology can accurately measure cardiac chamber areas.
- To compare the accuracy of conventional and advanced transducers in measuring left ventricular (LV) areas.
Main Methods:
- 2D echocardiographic and anatomic cross-sectional areas of 25 animal LV sections were measured in vitro.
- Measurements were taken using conventional 13mm and 15mm transducers and a 15mm dynamically focused annular array transducer.
- Areas were measured at varying transducer-to-slice distances (2cm, 6cm, 10cm) and compared using computer-assisted planimetry.
Main Results:
- All transducers showed excellent correlation between echocardiographic and anatomic measurements for total, myocardial, and cavity areas (r values ranging from 0.93 to 0.99).
- Conventional transducers significantly underestimated LV cavity areas, especially larger ones.
- The dynamically focused transducer achieved accurate LV cavity area measurements across all depths, unlike conventional transducers.
Conclusions:
- Dynamically focused annular array transducers offer improved accuracy for quantitative echocardiography.
- Advanced echocardiographic technology can overcome the limitations of underestimating cardiac chamber sizes, particularly LV cavity areas.