Cervical spine: three-dimensional MR imaging with magnetization transfer prepulsed turbo field echo techniques

Area of Science:

• Medical Imaging
• Neuroscience
• Biophysics

Background:

• Magnetic Resonance (MR) imaging is crucial for visualizing the cervical spine.
• Optimizing contrast between cerebrospinal fluid (CSF) and the spinal cord is essential for diagnostic accuracy.
• Magnetization transfer (MT) pulses can potentially enhance image contrast.

Purpose of the Study:

• To evaluate the effects of various MR imaging parameters on CSF-to-cord contrast in the cervical spine.
• To determine optimal parameters for achieving maximum myelographic effect using a magnetization transfer preparatory pulse.

Main Methods:

• MR imaging of the cervical spine was performed on 11 volunteers.
• A 3D Fourier transform, turbo field echo sequence with a magnetization transfer preparatory pulse was utilized.
• Parameters evaluated included flip angle, number of shots, phase-encoding profile order, and MT prepulse offset frequency.

Main Results:

• Cerebrospinal fluid-to-cord contrast was significantly improved by lowering the flip angle and increasing the number of shots.
• Implementing a magnetization transfer prepulse and linear phase-encoding profile order further enhanced contrast.
• Maximum myelographic effect was achieved with a 500-Hz MT prepulse frequency offset, 3-degree flip angle, six shots, and linear phase-encoding order.

Conclusions:

• Specific MR imaging parameters, including flip angle, number of shots, and phase-encoding order, critically influence CSF-to-cord contrast.
• The use of a magnetization transfer preparatory pulse with optimized parameters can significantly enhance myelographic effect in cervical spine imaging.
• These findings provide a basis for improved non-invasive visualization of the cervical spinal cord.