CN209863823U

CN209863823U - Head coil device

Info

Publication number: CN209863823U
Application number: CN201920357710.8U
Authority: CN
Inventors: 卢洁; 赵国光; 史宇航; 刘慧�
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2019-12-31
Anticipated expiration: 2029-03-20

Abstract

The embodiment of the utility model discloses head coil device, the device includes: a head coil body; an optical emission unit disposed on the head coil for emitting a structured light signal to a face of a subject; an optical receiving unit disposed on the head coil and spaced a preset distance from the optical emitting unit, for receiving the reflected reflective structured light signal and acquiring a facial image of the subject; wherein the structured light signal, the reflected structured light signal, and the facial image are used to determine facial information of the subject. The embodiment of the utility model solves the problem that the existing head coil can not monitor the eye state and the head motion information of the examinee in real time; the embodiment of the utility model provides a can be at the in-process synchronous monitoring person's of acquireing head scanning data eyes state and head motion information to increase the success rate of acquireing brain medical image.

Description

Head coil device

Technical Field

The embodiment of the utility model provides a relate to medical imaging technique, especially relate to a head coil device.

Background

Currently, medical imaging devices such as MR or PET-MR are widely used in structural and functional clinical diagnosis and research of brain, and when acquiring medical brain images, a head coil capable of receiving radio frequency signals needs to be placed on the head of a subject. To acquire high resolution PET brain images and multi-contrast MR brain images, the PET-MR scan time can be relatively long. In long-time scanning, a subject inevitably moves around involuntarily, so that a PET brain image and an MR brain image generate motion artifacts; meanwhile, the long scanning time easily causes the difficulty of keeping the single state of the eyes of the examinee open or closed, and further influences the brain function network state. In order to correct the artifact caused by the movement and remove the influence of the open eyes or the closed eyes on the brain function network, the head movement information of the examinee needs to be accurately monitored in real time, an image without the artifact needs to be reconstructed according to the movement information, and the correct brain function network needs to be calculated by processing the relevant function images according to the open eye state or the closed eye state.

However, the current head coil does not monitor the head movement and eye state information of the subject in real time. Generally, in order to ensure image quality, a technician retrospectively monitors the image quality after scanning, and if the image quality is not satisfactory, the subject is rescanned. This process is time consuming and labor intensive, reducing the comfort of the subject while placing a burden on the technician scan.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a head coil device to the realization is carrying out the in-process that the head formation of image scanned the examinee, the state of opening or closing the eye of real-time supervision examinee's eyes, and the head motion condition, thereby increase the success rate of acquireing brain function image.

An embodiment of the utility model provides a head coil device, this head coil includes:

a head coil body;

an optical transmitting unit disposed on the head coil body for transmitting a structured light signal to a face of a subject;

an optical receiving unit disposed on the head coil body and spaced a preset distance from the optical transmitting unit, for receiving the reflected reflective structure light signal and acquiring a facial image of the subject;

wherein the structured light signal, the reflected structured light signal, and the facial image are used to determine facial information of the subject.

Optionally, the face information includes eye state and head movement information.

Optionally, the optical transmitting unit and/or the optical receiving unit are disposed inside the head coil body.

Optionally, the optical transmitting unit and/or the optical receiving unit are disposed outside the head coil body.

Optionally, the optical transmitting unit and/or the optical receiving unit are disposed outside the head coil body, and include:

when the head coil body is provided with an opening, the optical transmitting unit and the optical receiving unit are fixed above or at the opening, so that the structured light transmitted by the optical transmitting unit is emitted to the examinee through the opening, and the optical receiving unit receives the reflected structured light through the opening.

Optionally, the optical emission unit is a laser emission unit, and the wavelength of the laser beam emitted by the laser emission unit is selected from any wavelength within a preset spectrum range.

Optionally, the photosensitive waveband of the optical receiving unit includes a wavelength of the laser beam emitted by the laser emitting unit.

Optionally, the optical receiving unit includes a CCD array.

Optionally, the structured light forms a preset pattern when projected on the face of the subject, and the preset pattern includes a dot pattern, a checkerboard pattern, and a striped pattern.

The embodiment of the utility model provides a through set up the optical transmitting unit of transmission structured light and accept the optical receiving unit of reflection structured light on head coil body to make head coil obtain the facial 3D structured light information of examinee and facial image simultaneously at the receiving head inductive signal, be used for rebuilding and optimizing the target image, solved current head coil can not real-time supervision examinee's eyes state and head motion information, influence brain function network state, lead to the problem that there is the motion artifact in the target medical image who obtains; the eye state and head movement information of the examinee can be synchronously monitored in the process of acquiring the head scanning data, so that the success rate of acquiring medical images is increased.

Drawings

Fig. 1 is a schematic structural diagram of a head coil device in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a head coil device in an embodiment of the present invention;

fig. 3 is a schematic diagram of the operation of the head coil device in the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Examples

Fig. 1 and fig. 2 are schematic structural diagrams of a head coil device according to an embodiment of the present invention, and the head coil device according to this embodiment may be used to monitor facial information of a subject, so as to further acquire a brain medical image and confirm a brain function network state.

As shown in fig. 1, the head coil device includes the following structure:

the head coil body 101 is used for covering the head of the examinee and receiving the induction signal of the scanning device. In an actual usage scenario, the head coil body 101 is a three-dimensional solid structure, and is a cavity that can cover the head of the subject. In the present embodiment, only a side view of the head coil device will be described for explaining the functional structure of the head coil device.

An optical transmitting unit 102 provided on the head coil body 101 for transmitting a structured light signal to the face of the subject; and an optical receiving unit 103 disposed on the head coil body 101 and spaced a preset distance from the optical transmitting unit 102, for receiving the reflected structured light signal and acquiring a facial image of the subject. Wherein the structured light signal, the reflected structured light signal, and the facial image are used to determine facial information of the subject.

It should be noted here that the preset distance between the optical transmitting unit 102 and the optical receiving unit 103 is determined when the two units are fixed to the head coil body, and the preset distance may be several millimeter units or several centimeter units, depending on the actual situation of the head coil body.

The face information includes eye state and head movement information. The eye state includes the state of opening and closing of the eyes, or different states such as half-open and half-closed states in which the eyes are opened to different degrees. The head movement information includes whether the subject's head has moved, such as swung left or right. In addition, the facial information may also include facial expression information of the subject, a sleeping state, and size and contour information of the subject's eyes, and the like.

The number of the optical transmission units 102 and the number of the optical receiving units 103 are at least one, and when there are a plurality of optical transmission units 102, each optical transmission unit 102 may emit different structured light, that is, when the structured light is projected onto the subject, different pattern structures, such as checkerboard and dot matrix, may be formed. The optical receiving unit 103 may also receive white light while receiving the reflective structured light, that is, may acquire images of the reflective structured light and the subject at the same time. When there are a plurality of optical receiving units 103, the reflected structured light may be acquired from at least one of the optical receiving units 103, and the image of the subject may be acquired from the other optical receiving units 103.

In fig. 1, one optical transmission unit 102 and one optical reception unit 103 are exemplarily shown. In the head coil device shown in fig. 1, the optical transmission unit 102 and/or the optical reception unit 103 are provided inside the head coil body 101.

In another embodiment, the optical transmission unit 102 and/or the optical reception unit 103 are provided outside the head coil body 101. Specifically, referring to the head coil device shown in fig. 2, an opening is formed in the head coil body 101, the optical transmission unit 102 and the optical reception unit 103 are fixed above (or at) the opening by the fixing member 104, the structured light transmitted by the optical transmission unit 102 is made to be emitted to the subject through the opening, and the reflected structured light is received by the optical reception unit 103 through the opening.

Optionally, the optical emitting unit 102 is a laser emitting unit, and the wavelength of the laser beam emitted by the laser emitting unit is selected from any wavelength in a preset spectrum range, such as near infrared light. Then, the light sensing wavelength band of the optical receiving unit 103 includes the wavelength of the laser beam emitted by the laser emitting unit. Optionally, the optical receiving unit 103 includes a CCD array.

Specifically, the structured light signal and the reflected structured light signal are 3D structured light, wherein the structured light signal is a speckle light having a certain structural characteristic and a specific wavelength and projected onto the head of the subject through the optical transmitting unit 102, the reflected structured light is reflected light of the speckle light collected through the optical receiving unit 103, for example, the structured light projected onto the head of the subject through the optical transmitting unit 102 shown in fig. 3 is a chessboard, and the reflected structured light is a series of chessboard light spots with different deformation degrees received by the optical receiving unit 103. This is because the light having a certain structure forms different image phase information due to different depth regions of the object to be irradiated, and the change of the structured light can be converted into depth information by an arithmetic unit in the computer device, and the arithmetic principle is a triangulation algorithm, so that when the structured light is irradiated to the head of the subject, the change of the depth of the face of the subject can be determined based on the reflected structured light signal, and the head movement information of the subject can be determined based on the change of the depth. It should be noted that the structured light forms a preset pattern with structural features when projected, and may further include a dot diagram and a stripe pattern. Finally, image reconstruction is performed by an image reconstruction device according to the scanning data and the face information to obtain a target image, and the motion artifact in the target image is corrected and compensated.

Fig. 3 is a schematic diagram of the operation of the head coil device in the embodiment of the present invention. When a head of a person to be examined needs to be scanned to obtain a medical head image, the person to be examined can lie on the scanning bed, wears the head coil device and enters the scanning cavity of the scanning device under the driving of the scanning bed. During the process of acquiring the scan data by the head coil device, the optical transmitting unit 102 emits the structured light toward the face of the subject, the pattern formed by the structured light projected on the face of the subject is a checkerboard, and then the reflected structured light is received by the optical receiving unit 103, and the pattern of the reflected structured light is a series of checkerboards with different degrees of deformation. Meanwhile, the optical receiving unit 103 may also acquire an image of the face of the subject for the image recognition unit in the computer device to recognize the face of the subject to determine the motion information of the head of the subject. The arithmetic unit of the computer device then determines the change in the depth of the face of the subject based on the triangulation algorithm based on the structured light emitted by the optical emission unit 102, the reflected structured light received by the optical reception unit 103, and the preset distance between the optical emission unit 102 and the optical reception unit 103, and further determines the movement information of the head of the subject based on the change in the depth. Finally, according to the scanning data, the motion information of the head of the examinee and the motion information of the head of the examinee, a medical image of the head of the examinee is reconstructed, and the influence of the head motion artifact on the medical image of the head is reduced.

The embodiment of the utility model provides a through set up the optical transmitting unit of transmission structured light and accept the optical receiving unit of reflection structured light on head coil body to make head coil obtain the facial 3D structured light information of examinee and facial image simultaneously when receiving head inductive signal, be used for rebuilding and optimizing the target image, solved current head coil can not real-time supervision examinee's eyes state and head motion information's problem; the embodiment can synchronously monitor the eye state and the head movement information of the examinee in the process of acquiring the head scanning data, thereby increasing the success rate of acquiring medical images.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A head coil apparatus, comprising:

a head coil body;

2. The apparatus of claim 1, wherein the facial information comprises eye state and head movement information.

3. The device according to claim 1, characterized in that the optical transmission unit and/or the optical receiving unit is provided inside the head coil body.

4. The device of claim 1, wherein the optical transmitting unit and/or the optical receiving unit are provided outside the head coil body.

5. The apparatus of claim 4, wherein the optical transmitting unit and/or the optical receiving unit is provided outside the head coil body, comprising:

6. The apparatus according to claim 1, wherein the optical emission unit is a laser emission unit that emits a laser beam having a wavelength selected from any wavelength within a predetermined spectrum.

7. The apparatus of claim 6, wherein the photosensitive wavelength band of the optical receiving unit comprises a wavelength of the laser beam emitted by the laser emitting unit.

8. The apparatus of claim 7, wherein the optical receiving unit comprises a CCD array.

9. The apparatus of any one of claims 1-8, wherein the structured light when projected on the subject's face forms a preset pattern comprising a dot pattern, a checkerboard pattern, and a striped pattern.