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Validation of ultrafast computed tomographic left ventricular volume measurement
R J Pietras1, C J Wolfkiel, K Veselik
1Department of Medicine, University of Illinois, College of Medicine, Chicago.
Investigative Radiology
|January 1, 1991
Summary
Ultrafast computed tomography accurately measures phantom volumes with minimal error. Left ventricular cast volume measurements using this method are comparable to cineradiography, showing high correlation.
Area of Science:
- Medical Imaging
- Cardiovascular Imaging
Background:
- Accurate left ventricular volume measurement is crucial for cardiac assessment.
- The precision of ultrafast computed tomography (UFCT) for this application requires validation.
Purpose of the Study:
- To evaluate the accuracy and reproducibility of UFCT for measuring left ventricular volumes.
- To compare UFCT measurements with established methods like cineradiography.
Main Methods:
- UFCT was used to image 11 rectangular phantoms and 17 left ventricular casts.
- Two observers planimetered serial tomographic images to compute volumes.
- Volumes were compared against true phantom volumes and cineradiographic measurements.
Main Results:
- UFCT showed high accuracy for phantom volumes (0.99 correlation, -0.1 +/- 3.5% deviation).
- Left ventricular cast volume measurements by UFCT correlated highly with true volumes (0.99 correlation, 6% +/- 20% deviation).
- UFCT measurements of left ventricular casts were comparable to cineradiography (0.99 correlation).
Conclusions:
- Ultrafast computed tomography provides accurate and reproducible volume measurements for phantoms.
- UFCT is a viable method for assessing left ventricular cast volumes, with results comparable to cineradiography.