A one-shot lactate-editing sequence for localized whole-body spectroscopy

Area of Science:

• Magnetic Resonance Imaging
• Biomedical Spectroscopy
• Medical Physics

Background:

• Lactate detection is crucial for diagnosing various metabolic disorders and pathologies.
• Existing lactate-edited spectroscopy methods often face challenges with motion artifacts and require high magnetic field strengths.
• Low-field MRI (1.5-T) offers wider accessibility but demands optimized pulse sequences for effective spectroscopy.

Purpose of the Study:

• To develop and present a novel pulse sequence for localized lactate-edited proton spectroscopy.
• To optimize this sequence for routine clinical use at low magnetic field strengths (1.5-T).
• To enhance suitability for clinical applications by addressing limitations of previous methods.

Main Methods:

• A "one shot" pulse sequence design was employed for rapid data acquisition.
• Binomial pulses were utilized for achieving high water suppression.
• The sequence was designed to avoid the need for narrow band radiofrequency pulses, which are impractical at low fields.

Main Results:

• The presented pulse sequence demonstrates robustness against patient motion due to its "one shot" nature.
• High water suppression was achieved, improving spectral quality.
• The method is compatible with localized spectroscopic measurements and does not require long, narrow band RF pulses.

Conclusions:

• The developed lactate-editing pulse sequence is well-suited for 1.5-T clinical MRI.
• Its motion insensitivity and efficient water suppression offer significant advantages over previous techniques.
• This method facilitates easier and more reliable in vivo lactate quantification in clinical settings.