Patent ID: 11946991
Assignee: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, SEJONG CAMPUS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A device for acquiring a magnetic resonance image, the device comprising:
a plurality of top-hat dipole antennas having a length and an operating frequency which are adjustable depending on an image region; and
an antenna circuit module configured to adjust the operating frequency,
wherein the top-hat dipole antenna includes:
a pair of antenna leg parts linearly arranged while being spaced apart from each other; and
a pair of top-hat parts provided at opposite distal ends of the antenna leg part to increase a current at the distal end of the antenna leg part by increasing a capacitance,

wherein the top-hat part is bent inward from a contact portion with the antenna leg part to increase the current at the distal end of the antenna leg part by increasing the capacitance,
wherein the antenna circuit module includes a tuning circuit unit to decrease the operating frequency of the top-hat dipole antenna and to perform impedance matching,
wherein the tuning circuit unit includes:
a tuning inductor series-connected to the top-hat dipole antenna to increase an inductance of the tuning circuit unit; and
an impedance matching inductor and an impedance matching capacitor to perform the impedance matching depending on the operating frequency by adjusting the inductance and the capacitance,

wherein the antenna circuit module includes a receive radio frequency coil including a plurality of loop coils, and the receive radio frequency coil is provided inside an arrangement of the plurality of top-hat dipole antennas,
wherein the top-hat dipole antennas are connected to mutually different types of antenna circuit modules, respectively, and currents having mutually different amplitudes and phases flow through the top-hat dipole antennas by the mutually different types of antenna circuit modules,
wherein each antenna leg part includes:
a plurality of antenna leg segments; and
an antenna leg capacitor interposed between the antenna leg segments to increase the operating frequency,

wherein the top-hat dipole antenna has a first length when provided at a first position, and has a second length when provided at a second position except for the first position, and
wherein a mirror-plate module is adjacent to one end portion of the plurality of top-hat dipole antennas and provided perpendicularly to the antenna leg part.