Resonator coils for magnetic resonance imaging at 6 MHz

Area of Science:

• Electrical Engineering
• Resonant Circuits
• Electromagnetics

Background:

• The Alderman and Grant design is a key slotted tube resonator.
• Low-frequency (6 MHz) applications often require balanced electrical feeds.
• Existing resonator designs may have limitations in balanced feed requirements.

Purpose of the Study:

• To modify the Alderman and Grant slotted tube resonator design.
• To eliminate the need for a balanced electrical feed at low frequencies.
• To develop new resonator designs (saddle coil, strip line) with balanced electrical resonance.

Main Methods:

• Modified the lumped capacitor distribution in the Alderman and Grant slotted tube resonator.
• Tuned a saddle coil resonator with lumped capacitors.
• Tuned a strip line resonator with lumped capacitors.

Main Results:

• The modified slotted tube resonator obviates the need for a balanced electrical feed at 6 MHz.
• Electrically balanced resonance was achieved in both the saddle coil and strip line resonators.
• Similar lumped capacitor distributions were effective across different resonator types.

Conclusions:

• The modified slotted tube resonator design offers a simpler solution for low-frequency balanced feed requirements.
• New saddle coil and strip line resonator designs provide viable alternatives for achieving balanced electrical resonance.
• Lumped capacitor distribution is a critical factor in achieving balanced resonance in various resonator types.