Related Experiment Videos
Single-shot 3D imaging techniques improve arterial spin labeling perfusion measurements
Matthias Günther1, Koichi Oshio, David A Feinberg
1Advanced MRI Technologies, Sebastopol, California 95472, USA. matthias.guenther@AdvancedMRI.com
Magnetic Resonance in Medicine
|July 21, 2005
Summary
Arterial spin labeling (ASL) can now achieve higher signal-to-noise ratios (SNR) using 3D imaging, improving brain perfusion measurements. This technique enhances perfusion quantification reliability for clinical applications.
Area of Science:
- Medical Imaging
- Neuroscience
- Biophysics
Background:
- Arterial spin labeling (ASL) measures brain perfusion non-invasively.
- ASL techniques suffer from low signal-to-noise ratio (SNR) due to the low blood volume fraction in the brain.
Purpose of the Study:
- To improve the SNR of ASL by combining it with single-shot 3D readout techniques.
- To enhance the reliability of perfusion quantification in clinical settings.
Main Methods:
- A single-shot 3D-GRASE sequence was developed and tested.
- Low-resolution maps of bolus arrival time were acquired using QUIPSS II derivatives.
Main Results:
- The 3D-GRASE sequence demonstrated a 2.8-fold increase in SNR compared to 2D EPI.
- Acquisition of 18 slices in 2 minutes achieved an SNR of 10+ for gray matter perfusion.
- The bolus arrival time mapping improved differentiation between perfusion and delayed arrival.
Conclusions:
- Single-shot 3D imaging techniques are optimal for ASL, offering improved efficiency and SNR.
- The proposed methods enhance the reliability of ASL perfusion quantification for clinical use.