Acoustic noise reduction in MRI using Silent Scan: an initial experience

Area of Science:

• Radiology
• Medical Imaging Technology
• Acoustics in Medicine

Background:

• Acoustic noise in Magnetic Resonance Imaging (MRI) is a primary cause of patient discomfort.
• This noise can lead to communication issues, sedation difficulties, and hearing impairment.
• Silent Scan technology aims to mitigate noise by altering gradient excitation levels.

Purpose of the Study:

• To evaluate the preliminary experience with Silent Scan technology in neuroimaging.
• To assess both subjective and objective noise levels associated with the technique.
• To determine the impact on diagnostic image quality.

Main Methods:

• Ten patients underwent brain MRI using a 3 Tesla system.
• Both T1-weighted gradient echo (BRAVO) and Silenz pulse sequences were utilized.
• Subjective patient sound ratings, objective sound level measurements, and radiologist image quality assessments were performed.

Main Results:

• The Silenz sequence demonstrated a significant reduction in mean noise levels (68.8 dB vs. 104.65 dB).
• This reduction corresponds to a 34.3% decrease in sound intensity and a 99.97% decrease in sound pressure.
• Patients reported lower subjective noise scores with Silenz, and image quality was rated as fully diagnostic.

Conclusions:

• T1-weighted Silent Scan is a promising technique for reducing acoustic noise during MRI.
• The technology enhances patient comfort without compromising diagnostic image quality.
• Silent Scan offers a significant improvement over conventional MRI noise levels.