Study of Bolus Characteristics in Magnetic Resonance Angiography
Author Information
Author(s): Cai Zhijun, Stolpen Alan, Sharafuddin Melhem J, McCabe Robert, Bai Henri, Potts Tom, Vannier Michael, Li Debiao, Bi Xiaoming, Bennett James, Golzarian Jafar, Sun Shiliang, Wang Ge, Bai Er-Wei
Primary Institution: University of Iowa
Hypothesis
A detailed contrast bolus propagation model is essential for optimizing bolus-chasing Computed Tomography Angiography (CTA).
Conclusion
The convolution function describes bolus dynamics reasonably well and could be used to implement the adaptive controller design.
Supporting Evidence
- The maximum speed of the bolus in the aorta ranged from 5–13 cm/s.
- The dwell time of the bolus ranged from 7–13 seconds.
- Bolus characteristics were well described by the proposed propagation model.
Takeaway
This study looked at how a contrast bolus moves through the aorta to help improve imaging techniques for doctors.
Methodology
MRA bolus-timing datasets of the aorta in thirty patients were analyzed using MATLAB to study bolus characteristics.
Limitations
Only a portion of the aorta was evaluated, and the analysis assumes a linear relationship between MR signal intensity and contrast density.
Participant Demographics
Patients included both males and females aged 15 to 71.
Digital Object Identifier (DOI)
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