Magnetic particle imaging device applicable to human

A magnetic particle imaging device comprising:

• a field free point (FFP) generation unit generating a FFP in a field of view (FOV);
• a first operation coil unit moving the FFP in a first direction;
• a second operation coil unit moving the FFP in a second direction;
• a third operation coil unit moving the FFP in a third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other;
• an excitation coil unit generating a magnetic field in the FOV, and exciting a magnetic particle in the FOV, wherein the excitation coil unit includes a first excitation coil and a second excitation coil disposed to be spaced in the third direction;
• a reception coil unit receiving a magnetic signal generated from the magnetic particle, wherein the reception coil unit includes a first reception coil wound in a first winding direction, disposed in the first excitation coil, and surrounded by an inner circumference surface of the first excitation coil, and a second reception coil disposed in the second excitation coil, surrounded by an inner circumference surface of the second excitation coil, and wound in a second winding direction which is an opposite direction to the first winding direction;
• and
• a processor dividing the FOV into a plurality of partial FOVs, controlling the first to third operation coil units so that the FFP moves in each of the plurality of partial FOVs, and generating an image for the FOV based on the magnetic signal for each of the plurality of partial FOVs,
• wherein the first operation coil unit includes a pair of first focus coils and a pair of first drive coils that are disposed to be opposite to each other in the first direction, and generate a first magnetic field in the first direction, and move the FFP in the first direction,
• wherein the second operation coil unit includes a pair of second focus coils and a pair of second drive coils that are disposed to be opposite to each other in the second direction, and generate a second magnetic field in the second direction, and move the FFP in the second direction,
• wherein the third operation coil unit includes a pair of third drive coils, which are disposed to be extended in the third direction, and generate a third magnetic field in the third direction, and move the FFP in the third direction,
• wherein amplitudes of magnetic fields generated in the first and second focus coils are larger than amplitudes of magnetic fields generated in the first to third drive coils, and frequencies of the magnetic fields generated in the first and second focus coils are lower than frequencies of the magnetic fields generated in the first to third drive coils,
• wherein the processor is configured to perform:
• a movement step that controls the first and second focus coils so that the FFP moves into a partial FOV of the plurality of partial FOVs;
• and then
• a scanning step that controls the first to third drive coils so that the FFP moves within the partial FOV,
• wherein in the movement step, the FFP moves into the plurality of partial FOVs, wherein each of the plurality of FOVs have a cuboid shape, by moving on an x and y plane through the control of the first and second focus coils, and
• wherein in the scanning step, the magnetic particle is scanned in the partial FOV while the FFP moves in each of the plurality of partial FOVs in x-axis, y-axis, and z-axis directions through the control of the first to third drive coils.