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Correction for partial volume errors in MR heart perfusion imaging
Herbert Köstler1, Christian Ritter, Martin Reiss-Zimmermann
1Institut für Röntgendiagnostik, Universität Würzburg, Germany. koestler@roentgen.uni-wuerzburg.de
Abstract:
Myocardial MR first-pass perfusion time courses are contaminated by signals from the ventricles (spillover) as a consequence of partial volume effects and motion. An early increase in the signal intensity from the myocardium is an indicator of contamination. This contamination leads to under- or overestimation of perfusion, depending on the amount of contamination. In this work a simple method for contamination correction is proposed: curves proportional to the signal intensity time courses in the ventricles are subtracted from the signal intensity time courses in the myocardium to minimize the variance of signal before the arrival of the contrast medium in the myocardium. The proposed correction is easy to apply, removes the contamination, and leads to more precise perfusion values.
Insights
A new method corrects for ventricular signal spillover in myocardial first-pass perfusion magnetic resonance imaging (MRI). This technique improves the accuracy of myocardial perfusion measurements by removing contamination.
Area of Science:
- Cardiovascular Imaging
- Medical Physics
- Biomedical Engineering
Background:
- Myocardial first-pass perfusion MRI is crucial for assessing heart blood flow.
- Signal spillover from ventricles due to motion and partial volume effects contaminates myocardial signals.
- This contamination can lead to inaccurate perfusion quantification.
Purpose of the Study:
- To develop and validate a simple method for correcting ventricular signal contamination in myocardial perfusion MRI.
- To improve the precision and reliability of myocardial perfusion measurements.
Main Methods:
- A novel correction technique involves subtracting ventricle signal time courses from myocardial signals.
- The subtraction is based on minimizing signal variance before contrast arrival.
- This method aims to remove contamination caused by partial volume effects and motion.
Main Results:
- The proposed method effectively removes ventricular signal contamination from myocardial time courses.
- Correction leads to more precise and reliable myocardial perfusion values.
- The technique is easy to implement in clinical practice.
Conclusions:
- The developed method offers a simple yet effective solution for myocardial perfusion MRI contamination.
- Accurate perfusion quantification is essential for diagnosing and managing cardiovascular diseases.
- This correction technique enhances the diagnostic value of first-pass perfusion MRI.
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