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Visualization of the pulmonary valve using cine MR imaging
D E Kivelitz1, P M Dohmen, A Lembcke
1Institut für Radiologie, and Klinik für Kardiovaskuläre Chirurgie, Universitätsklinikum Charité, Humboldt-Universität zu Berlin, Berlin, Germany. dietmar.kivelitz@charite.de
Acta Radiologica (Stockholm, Sweden : 1987)
|April 16, 2003
Summary
Bright-blood cine magnetic resonance imaging (MRI) effectively visualizes pulmonary valve leaflets after the Ross operation. This technique allows for detailed assessment of valve morphology and function in surgical patients.
Area of Science:
- Cardiovascular Imaging
- Magnetic Resonance Imaging
- Cardiac Surgery
Background:
- The Ross operation is a complex surgical procedure involving pulmonary valve replacement.
- Accurate assessment of the pulmonary valve's morphology and function post-surgery is crucial for patient outcomes.
- Non-invasive imaging techniques are essential for monitoring these patients.
Purpose of the Study:
- To evaluate the capability of bright-blood cine magnetic resonance imaging (MRI) to directly visualize pulmonary valve replacement leaflets.
- To assess the functional and morphological characteristics of the pulmonary valve after the Ross operation using MRI.
Main Methods:
- Long and short axis views of the pulmonary valve were acquired using bright-blood cine MRI.
- 10 healthy subjects and 14 patients post-Ross operation were included.
- Valve morphology, function, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and pulmonary regurgitation via flow measurements were analyzed.
Main Results:
- Bright-blood cine MRI successfully visualized the tricuspid morphology of the pulmonary valve in all subjects.
- Significant differences in SNR of the leaflets were observed between normal subjects and post-Ross operation patients compared to blood.
- Pulmonary regurgitation was detected in 5 patients, confirmed by flow measurements, due to insufficient valve closure.
Conclusions:
- Bright-blood cine MRI provides in-plane visualization of the pulmonary valve.
- This MRI technique is effective for both functional and morphological evaluation of the pulmonary valve in patients following the Ross operation.
- Cine MRI aids in assessing outcomes and potential complications after pulmonary valve surgery.