CN205193262U - Ankle coil assembly used for magnetic resonance imaging - Google Patents

Abstract

The utility model discloses an ankle coil assembly used for magnetic resonance imaging, include: first casing, second casing and third casing are provided with coil section respectively on first casing, the second casing, first casing, first casing set up on the third casing, first casing with the second casing adjacent regional superpose be in the same place, first casing, second casing, third casing enclose to form and are used for holding the cavity by the scanning position, and first casing or second casing can be on the third casing direction removal about along, first casing, second casing remove along controlling the direction to a scanning demand for adjusting the first casing of the left and right sides, the interval of second casing to be in order adapting to not equidimension foot type.

Description

An ankle coil assembly for magnetic resonance imaging

【Technical field】

The utility model relates to magnetic resonance imaging technology, in particular to a radio frequency coil for magnetic resonance imaging.

【Background technique】

The basic principle of magnetic resonance imaging is: some atoms containing a single number of protons in human tissue, such as hydrogen atoms, can spin and generate magnetic moments, which can be regarded as some small magnets. Under normal conditions, the spin direction of these small magnets The arrangement is irregular, but under the action of a fixed static magnetic field, there will be a directional arrangement; at this time, when a radio frequency pulse with the same frequency as the static magnetic field is applied, these hydrogen atoms absorb a certain amount of energy and resonate, and the spin direction is under the action of the radio frequency pulse The deflection occurs and the arrangement is regular, that is, the phenomenon of magnetic resonance occurs; after the radio frequency pulse disappears, these hydrogen atoms will return to their original state. During the recovery process, energy is released and the spin direction is changed. The signals of the human body are sampled, and then the images of human tissues can be obtained by using these collected signals for image reconstruction. In the above process, the radio frequency coil is mainly used to transmit radio frequency pulses and collect magnetic resonance radio frequency signals.

The closer the radio frequency coil for collecting magnetic resonance signals is to the human tissue, the better the quality of the collected magnetic resonance signals and the higher the signal-to-noise ratio of imaging. Therefore, various local radio frequency coil components suitable for various parts of the human body have been designed, such as the head The coil assembly, wrist coil assembly, ankle coil assembly, etc., the coil assembly is composed of multiple coils, and the multiple coils collect magnetic resonance signals in parallel. The above-mentioned coil assembly includes a plurality of independent radio frequency coil units, such as ring coils, saddle coils and the like.

Commonly used ankle coils are divided into flexible coils and special ankle coils. The ankle is wrapped with a flexible coil, so that the signal of the toe cannot be obtained, and at the same time, the sole of the foot and the calf will form a certain angle in the sagittal plane, which does not conform to the observation of the standard anatomical posture of the human body. Another type of ankle coil is shared with the knee coil, which does not fit well with the foot, which is not conducive to obtaining magnetic resonance signals with a high signal-to-noise ratio.

【Content of utility model】

The technical problem to be solved by the utility model is to provide an ankle coil assembly for magnetic resonance imaging, the size of which can be adjusted, so as to be suitable for magnetic resonance signal acquisition of ankles of different sizes.

The technical solution adopted by the utility model to solve the above technical problems is: an ankle coil assembly for magnetic resonance imaging, which is characterized in that it includes: a first shell, a second shell and a third shell, the first shell Coil units are respectively arranged on the body and the second casing, the first casing and the second casing are arranged on the third casing, the adjacent areas of the first casing and the second casing are stacked together, the second casing The first housing, the second housing and the third housing surround a cavity for accommodating the part to be scanned, and the first housing or/and the second housing can move left and right on the third housing.

Preferably, the first housing and the second housing respectively include an upper wall and a side wall, the side wall is made of rigid material, the upper wall is made of flexible material, and the upper wall is supported by the side wall.

Preferably, the first housing and the second housing respectively include an upper wall and a side wall, the side wall and the upper wall are made of flexible materials, and the upper wall and the side wall are of a one-piece structure.

Preferably, the upper wall of the first housing and the upper wall of the second housing are respectively provided with coil units, and the coil units overlap at the intersection of the upper wall of the first housing and the upper wall of the second housing decoupling.

Preferably, the upper wall of the first housing and the upper wall of the second housing are respectively arranged with a loop coil unit and a saddle coil unit, and the saddle coil unit and the loop coil unit are respectively located on two surfaces.

Preferably, an adhesive portion is provided in the adjacent area between the upper wall of the first housing and the upper wall of the second housing.

Preferably, the cavities include a first cavity extending horizontally and a second cavity extending vertically.

Preferably, the first housing and the second housing are provided with guide grooves, and the third housing is provided with guide rails matched with the guide grooves.

Preferably, the third housing includes a bottom wall and a rear wall, the rear wall extends in the up-down direction, and the bottom wall extends in the front-rear direction.

Preferably, the third housing is provided with a sliding slot, and the guide rail is arranged in the sliding slot, and the first housing and the second housing can move in the sliding slot in left and right directions.

Compared with the prior art, the utility model has the following beneficial effects: the ankle coil used for magnetic resonance imaging is used to cover the feet of the human body and image the feet; the bottom wall and the rear wall of the third housing are made of rigid materials , used to support the entire ankle coil, and fix the first shell and the second shell. Simultaneously, the bottom wall and the rear wall of the third housing are provided with chute, and the first housing and the second housing can move along the left and right directions in the chute, so as to adjust the first housing, the second housing on the left and right sides. The spacing between the two housings is adapted to the scanning needs of different sizes of feet. The upper walls of the first shell and the second shell are made of flexible materials, and the flexible materials can be pasted together to fit well with the upper foot, so that the distance between the corresponding coil unit and the instep is as small as possible, and the surface of the coil unit is as small as possible. When it is possible to be close to the patient's foot, the same cell distribution can obtain the optimal signal-to-noise ratio, thereby obtaining high-quality magnetic resonance images.

【Description of drawings】

Fig. 1-2 is the three-dimensional assembly diagram of the ankle coil assembly used for magnetic resonance imaging in Embodiment 1 of the present invention;

Fig. 3 is a three-dimensional combined view of an ankle coil assembly for magnetic resonance imaging according to Embodiment 2 of the present invention;

4-5 are three-dimensional combined diagrams of the ankle coil assembly used for magnetic resonance imaging in Embodiment 3 of the present invention;

Figure 6 is an exploded view of the ankle coil assembly in Figure 4;

7-8 are schematic illustrations of a foot placed in an ankle coil assembly for magnetic resonance scanning.

【detailed description】

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Please refer to Fig. 1-2, an ankle coil assembly for magnetic resonance imaging according to Embodiment 1 of the utility model of the present utility model, which includes: a first housing 1, a second housing 2 and a third housing 3, Coil units are respectively arranged on the first casing, the second casing and the third casing, the first casing and the second casing are arranged on the third casing, and the first casing and the second casing are adjacent The connected areas 10, 20 are stacked together, the first housing, the second housing, and the third housing surround (form) a cavity 123 for accommodating the part to be scanned, and the first housing or/and the second housing The second housing can move left and right on the third housing. Specifically, the first shell 1 can slide leftward or rightward on the third shell 3, or the second shell 2 can slide leftward or rightward on the third shell 3, or the first and second shells The bodies 1, 2 can slide on the third housing 3 to the left or to the right at the same time. The cavity 123 includes a first cavity extending horizontally and a second cavity extending vertically.

The first housing 1 and the second housing 2 respectively include upper walls 11, 21 and side walls 12, 22, the side walls 12, 22 are rigid materials, the upper walls 11, 21 are flexible materials, and the upper walls 11, 21 is supported by side walls 12,22. The flexible material is fixed in the rigid material on the left and right sides of the coil by pressing, that is, the upper walls 11, 21 can be fixed in the side walls 12, 22 by pressing. The adjacent areas 10 , 20 of the first shell 1 and the second shell 2 are located on the upper walls 11 , 21 , but the thickness of other parts of the other upper walls 11 , 21 is smaller. The adjoining region 10 , 20 is located approximately midway between the side walls 12 , 22 . The upper wall 11 of the first housing 1 and the adjacent areas 10 and 20 of the upper wall 21 of the second housing 2 are provided with adhesive parts to combine the two together. Preferably, the adhesive parts can be for Velcro.

The first casing 1 , the second casing 2 and the third casing 3 are respectively arranged with several coil units. The coil unit can be in the shape of a ring, a saddle, etc., and the number and size of the coil units are determined according to specific requirements. Specifically, the upper wall 11 of the first housing 1 and the upper wall 21 of the second housing 2 are respectively provided with coil units 101, 102 and 201, 202, and the coil units 101, 201 and the coil units 102, 202 are installed in the first housing. The area where the upper wall 11 of the body 1 intersects with the upper wall 21 of the second housing 2 is overlapped and decoupled. Wherein, the coil units 101 and 201 are saddle-shaped coil units, and the coil units 102 and 202 are annular coil units; and the saddle-shaped coil unit and the annular coil unit are respectively located on two surfaces, wherein the annular coil unit is arranged on a horizontal plane, and the saddle coil unit The coil unit is arranged on a substantially vertical plane.

The third housing 3 includes a bottom wall 31 and a rear wall 32 , the rear wall 32 extends in the vertical direction, and the bottom wall 31 extends in the front-rear direction. The bottom wall 31 and the rear wall 32 of the third housing 3 are provided with sliding slots 300 , and the side walls 12 of the first housing 1 and the side walls 22 of the second housing 2 can move in the sliding slots 300 along left and right directions.

Further, the radio frequency coil assembly also includes a base 4 on which positioning holes 41 are arranged along the left and right directions, and a positioning buckle that can be combined with the positioning holes 41 is provided on the bottom of the third housing 3 . The whole ankle coil utilizes positioning holes 411 to be fixed on the base. The base can move along the direction of the examination bed, and the ankle coil can move along the left and right directions on the base, which can adapt to the examination of different human bodies and left and right feet.

Referring to Fig. 3, a kind of ankle coil assembly for magnetic resonance imaging of the second embodiment of the utility model of the utility model has basically the same structure as the ankle coil assembly in the first embodiment, and the first ankle coil assembly in the second embodiment A housing 1' and a second housing 2' respectively include an upper wall and a side wall, the side wall and the upper wall are made of flexible materials, and the upper wall and the side wall are of a one-piece structure; others are the ankle coil of the first embodiment Parts with the same components will not be repeated.

Referring to Fig. 4-5, a kind of ankle coil assembly for magnetic resonance imaging of the third embodiment of the utility model of the utility model is basically the same structure as the ankle coil assembly in the first embodiment, and the ankle coil assembly in the third embodiment The third casing 3 includes a bottom wall 31 and a rear wall 32 , the rear wall 32 extends in the up-down direction, and the bottom wall 31 extends in the front-rear direction. The first housing 1 and the second housing 2 are respectively provided with guide grooves 120 , and the third housing 3 is provided with guide rails 301 matching with the guide grooves 120 . Specifically, guide rails 301 are provided on the bottom wall 31 and the rear wall 32 of the third housing 3, and there are four guide rails 301 arranged on both sides of the bottom and the rear of the third housing 3 respectively. 1. The second casing 2 is correspondingly provided with a guide groove 120 . Preferably, the guide rail 301 can be arranged in the slide groove 300 . Further, three commonly used positioning marks can be set on the guide rail 300: suitable for small feet, normal feet, swollen or plastered feet respectively. The operator only needs to follow the positioning marks to conveniently complete the scanning positioning for different situations.

Please refer to Fig. 7-8, when the foot LF (left foot) is placed in the cavity 123 of the ankle coil assembly, the upper walls 11, 21 of the first shell 1 and the second shell 2 are wrapped around the instep and the calf On the upper side, because the upper walls 11 and 21 are made of flexible material, the flexible material wraps around the instep to form a better fit with the foot. The intersecting parts of the upper walls 11 and 21 are fixed with Velcro. On the one hand, the coil units can be closer to the instep, and at the same time, the coil units 101, 201 and 102, 202 can be decoupled through the intersecting parts. The sidewalls 11 and 21 of the first shell 1 and the second shell 2 abut against the side of the foot and both sides of the lower leg. The bottom wall 31 and the rear wall 32 of the third housing 3 are attached to the heel and sole of the foot. In this way, the entire coil becomes an integral structure, and it is no longer necessary to split the coil into two parts to put it into the patient's foot.

When in use, the upper walls 11 and 21 of the first housing 1 and the second housing 2 can be opened at a certain angle along the direction D1, so that the patient's feet can be put into the coil; then the first housing 1 and the second housing 2 can be adjusted along the direction D2. For the relative distance between the side walls 12, 22 of the housing 2, after the positioning is completed, the upper walls 11, 21 are closed along the direction D3, and then the two can be fixed with Velcro. Then using the positioning of the magnetic resonance system, the ankle coil and the patient's foot are sent into the center of the magnet along the D4 direction for scanning.

To sum up, the utility model is used for the ankle coil of magnetic resonance imaging, which is used to cover the foot of the human body and image the foot. The bottom and rear part of the third housing are made of rigid materials, which are used to support the entire ankle coil. Fix the first shell and the second shell. Simultaneously, the bottom wall and the rear wall of the third casing are provided with chute, and the first casing and the second casing can move along the left and right directions in the chute, so as to adjust the first casing and the second casing on the left and right sides. The spacing between the two housings is adapted to the scanning needs of different sizes of feet. The upper walls of the first shell and the second shell are made of flexible materials, and the flexible materials can be pasted together to fit well with the upper foot, so that the distance between the corresponding coil unit and the instep is as small as possible. When the surface of the coil unit The same cell distribution can lead to an optimal signal-to-noise ratio when placed as close as possible to the patient's foot, resulting in high-quality MRI images.

Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims (10)

1. the ankle coil block for magnetic resonance imaging, it is characterized in that comprising: the first housing, the second housing and the 3rd housing, first housing, the second housing are respectively arranged with coil unit, first housing, the second housing are arranged on the 3rd housing, together with the overlay area that first housing is adjacent with the second housing, first housing, the second housing, the 3rd housing surround for holding by the cavity at scanning position, and the first housing is or/and the second housing can move in left-right direction on the 3rd housing.

2. the ankle coil block for magnetic resonance imaging according to claim 1, is characterized in that, described first housing, the second housing comprise upper wall and sidewall respectively, and sidewall is rigid material, and upper wall is flexible material, and described upper wall is by side wall support.

3. the ankle coil block for magnetic resonance imaging according to claim 1, is characterized in that, described first housing, the second housing comprise upper wall and sidewall respectively, and sidewall, upper wall are flexible material and upper wall and sidewall are monolithic structure.

4. the ankle coil block for magnetic resonance imaging according to claim 2, it is characterized in that, the upper wall of described first housing and the upper wall of the second housing are respectively equipped with coil unit, and coil unit is in the overlapping decoupling in the region that the upper wall of the first housing is crossing with the upper wall of the second housing.

5. the ankle coil block for magnetic resonance imaging according to claim 2, it is characterized in that, the upper wall of described first housing, the upper wall of the second housing are furnished with toroid winding unit and saddle-type coil unit respectively, and saddle-type coil unit and toroid winding unit lay respectively on two faces.

6. the ankle coil block for magnetic resonance imaging according to claim 2, is characterized in that, the upper wall of described first housing, the region that the upper wall of the second housing is adjacent are provided with bonding part.

7. the ankle coil block for magnetic resonance imaging according to claim 1, is characterized in that, described cavity comprises the first cavity extended in the horizontal direction and the second cavity extended along the vertical direction.

8. the ankle coil block for magnetic resonance imaging according to claim 1, is characterized in that, described first housing, the second housing are provided with guide groove, and described 3rd housing is provided with the guide rail matched with guide groove.

9. the ankle coil block for magnetic resonance imaging according to claim 8, is characterized in that, described 3rd housing comprises diapire and rear wall, and rear wall extends along the vertical direction, and diapire extends along the longitudinal direction.

10. the ankle coil block for magnetic resonance imaging according to claim 8, is characterized in that, described 3rd housing is provided with chute, and described guide rail is arranged in chute, and described first housing, the second housing can move in left-right direction in chute.