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Navigator-based slice tracking for prospective motion correction in kidney vessel architecture imaging
Ke Zhang1, Simon M F Triphan2, Felix T Kurz3
1Department of Diagnostic & Interventional Radiology, Heidelberg University Hospital, Heidelberg, Germany; Department of Radiology, German Cancer Research Center, Heidelberg, Germany.
Magnetic Resonance Imaging
|January 5, 2023
Summary
This study introduces a new method to reduce breathing motion during kidney imaging for better visualization of blood vessels. This technique improves the accuracy of kidney vessel architecture imaging (VAI).
Area of Science:
- Medical Imaging
- Radiology
- Biomedical Engineering
Background:
- Kidney vessel architecture imaging (VAI) is crucial for diagnosing renal diseases.
- Respiratory motion significantly degrades the quality of VAI.
- Existing motion compensation techniques have limitations.
Purpose of the Study:
- To develop and evaluate a navigator-based slice tracking method for prospective motion correction (PMC) in kidney VAI.
- To assess the effectiveness of this technique in real-time during contrast agent passage.
Main Methods:
- A dual gradient echo spin echo 2D EPI sequence was implemented for kidney VAI.
- A navigator acquisition at the diaphragm tracked respiratory motion.
- Real-time slice positioning adjustments were made based on navigator data.
Main Results:
- The navigator-based method accurately calculated respiratory motion.
- Prospective motion correction (PMC) significantly reduced motion artifacts.
- The coefficient of variation was reduced by 30% with PMC compared to no correction.
Conclusions:
- The developed motion-compensating technique is feasible for kidney VAI.
- This method shows potential for improved evaluation of renal microvasculature in disease states.
