Related Experiment Videos
Multiple breath-hold averaging (MBA) method for increased SNR in abdominal MRI
D A Feinberg1, N M Rofsky, G Johnson
1Department of Radiology, New York University Medical Center, New York 10016, USA.
Magnetic Resonance in Medicine
|December 1, 1995
Summary
Multiple breath-hold averaging (MBA) improves MRI quality by averaging images acquired during short breath-holds. This technique enhances signal-to-noise ratio and spatial resolution without significant motion artifacts.
Area of Science:
- Medical Imaging
- Radiology
- Biomedical Engineering
Background:
- Respiratory motion causes artifacts in MR imaging, limiting image quality.
- Breath-holding reduces motion but imposes strict time constraints, affecting signal-to-noise ratio (SNR) and spatial resolution.
Purpose of the Study:
- To introduce and evaluate a novel method, multiple breath-hold averaging (MBA), to overcome time limitations in MR imaging.
- To improve SNR and spatial resolution in MR images acquired during breath-holds.
Main Methods:
- Acquisition of multiple MR images during sequential, short breath-hold periods.
- Interspersing breath-holds with periods of normal breathing.
- Averaging the acquired images to create a composite image.
Main Results:
- The averaged image demonstrated a significant increase in SNR.
- Minimal blurring due to misregistration was observed, despite averaging across multiple breath-holds.
- MBA allows trading SNR improvements for enhanced spatial resolution.
Conclusions:
- Multiple breath-hold averaging (MBA) effectively mitigates time constraints in MR imaging.
- The MBA technique offers a viable strategy for improving image quality and resolution.
- MBA is applicable to various MR imaging sequences, including 3D, dynamic contrast, and image subtraction.