Sensitivity of an eight-element phased array coil in 3 Tesla MR imaging: a basic analysis

Area of Science:

• Magnetic Resonance Imaging (MRI)
• Medical Imaging Technology

Background:

• Conventional quadrature-type birdcage head coils (QD coils) are standard for 3 Tesla (3T) MRI.
• Evaluating advanced coil designs is crucial for improving image quality.

Purpose of the Study:

• To compare the performance of an 8-element phased array head coil (8 ch coil) against a QD coil.
• Assess signal-to-noise ratio (SNR) and image uniformity at 3T MRI.

Main Methods:

• Phantom studies using silicon oil were conducted on a 3T MR system.
• T(1)-weighted spin echo (SE) and T(2)-weighted fast SE images were acquired.
• Image quality was evaluated by SNR, uniformity, and visual assessment in healthy volunteers.

Main Results:

• The 8 ch coil demonstrated approximately double the SNR in the central phantom region compared to the QD coil.
• The 8 ch coil exhibited a flatter SNR distribution across the image, with less spatial variation than the QD coil.
• Improved image uniformity was observed with the 8 ch coil for both SE and fast SE sequences.

Conclusions:

• The 8-element phased array head coil significantly enhances SNR and image uniformity at 3T MRI.
• The 8 ch coil provides higher quality 3T MR images compared to conventional QD coils.
• This technology is beneficial for advanced 3T MR imaging applications.