CN109646031B

CN109646031B - PET-MR device

Info

Publication number: CN109646031B
Application number: CN201910105242.XA
Authority: CN
Inventors: 吴光河; 方福衣; 徐烽
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2022-11-25
Anticipated expiration: 2039-02-01
Also published as: CN109646031A

Abstract

The invention relates to the technical field of medical instruments, in particular to a PET-MR device, which comprises a PET detector module and a support cylinder, wherein the PET detector module is arranged on the outer side wall of the support cylinder and comprises: the detection module main part with connect the mount pad in the both ends of detecting the module main part, the support barrel is kept away from to the surface that the support barrel was kept away from than the detection module main part in the mount pad surface of keeping away from the support barrel. The surface of keeping away from the support barrel through making the mount pad keep away from the support barrel than the surface of surveying the module main part and keeping away from the support barrel, when the support barrel carried the PET detector module business turn over accepting hole on it, because the existence of mount pad, can protect and survey module main part and can not collided with. Therefore, the main detection part of the PET detector module is protected from being extruded and impacted, and the normal use and detection precision of the PET detector module are ensured.

Description

PET-MR device

Technical Field

The invention relates to the technical field of medical instruments, in particular to PET-MR equipment.

Background

The PET-MR Imaging device is a hybrid modality Imaging device integrating a PET (Positron Emission Tomography) scanner and an MRI (Magnetic Resonance Imaging, MR for short) scanner, has PET Imaging and MR Imaging functions, has high sensitivity and accuracy, and is the most advanced medical diagnosis device at present.

The core components of the MR system mainly include magnets and transmitting coils (including antenna, cable, capacitor, etc. electronics), the core components of the PET system are PET detectors, and in the integrated PET/MR design, PET-related detection devices need to be integrated into the MR system. In the conventional PET-MR imaging equipment, a PET detector and an MR transmitting coil are combined together through a supporting cylinder, and the MR transmitting coil and the PET detector are respectively arranged on the inner surface and the outer surface of the supporting cylinder, so that the combined assembly of the PET detector and the MR transmitting coil is realized.

Current PET detector is supported by the support barrel and is installed in the accommodation hole of magnet, and at the in-process of PET equipment assembly, can discover generally that the PET detector module can collide with the magnet pore wall, leads to the damage of different degrees to appear in the PET detector module.

Disclosure of Invention

Based on this, it is necessary to provide a PET-MR device for solving the problem that the PET detector module is easy to collide with the wall of the magnet hole to cause damage.

A PET-MR device comprising a PET detector module and a support cylinder, the PET detector module being mounted at an outer side wall of the support cylinder, the PET detector module comprising: the detection module comprises a detection module body and mounting seats connected to two ends of the detection module body, wherein the surface of the mounting seat far away from the support barrel is far away from the support barrel compared with the surface of the detection module body far away from the support barrel.

In one embodiment, the surface of the mounting and/or detection module body remote from the support cylinder is planar.

In one embodiment, the detection module body and the mounting seat are integrally formed or detachably arranged.

In one embodiment, the detection module body comprises a detection part and a supporting body for supporting the detection part, and the supporting body and the mounting seat are integrally formed or detachably arranged.

In one embodiment, the mounting block is removably connected to the support cylinder.

In one embodiment, the mounting seat is provided with a fixing hole, and the fixing hole is used for penetrating through a connecting piece for connecting the mounting seat and the support cylinder.

In one embodiment, the end of the fixing hole remote from the support cylinder is of a countersunk design.

In one embodiment, the mounting seat is provided with a positioning hole, and the positioning hole penetrates through the mounting seat along a direction perpendicular to the outer side wall of the support cylinder.

In one embodiment, the surface of the mounting seat opposite to the support cylinder is provided with an avoiding groove, and the avoiding groove is used for avoiding the convex part on the outer side wall of the support cylinder.

In one embodiment, the PET-MR apparatus further comprises a magnet coil provided with a receiving hole extending axially along the magnet coil, the support cylinder is mounted in the receiving hole, the PET detector module is mounted on a side wall of the support cylinder opposite to the magnet coil, and a surface of the mounting seat away from the support cylinder has a gap with the magnet coil.

In one embodiment, the number of the PET detector modules is at least two, and the at least two PET detector modules are arranged on the outer side wall of the support cylinder along the circumferential direction of the support cylinder to form a detector ring.

The beneficial effects of the invention include:

the surface of keeping away from the support barrel through making the mount pad keep away from the support barrel than the surface of surveying the module main part and keeping away from the support barrel, when the support barrel carried the PET detector module business turn over accepting hole on it, because the existence of mount pad, can protect and survey module main part and can not collided with. Therefore, the part of the PET detector module mainly playing a detection role is protected from being extruded and impacted, and the normal use and the detection precision of the PET detector module are ensured.

Drawings

FIG. 1 is a schematic sectional view of a PET-MR apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a PET detector module of the configuration shown in FIG. 1;

fig. 3 is a schematic end view of the structure shown in fig. 1.

Description of reference numerals:

01-PET-MR device;

10-a PET detector module;

100-a detection module body;

200-a mounting seat;

210-a fixation hole; 220-positioning holes; 230-avoidance slot;

20-supporting the cylinder;

30-secondary support cylinder;

40-a magnet coil;

410-a containing hole;

50-transmitting coil.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the PET-MR apparatus of the present invention is further described in detail by way of examples with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Referring to fig. 1 and 2, a PET-MR apparatus 01 according to an embodiment of the present invention includes a PET detector module 10 and a support cylinder 20, wherein the PET detector module 10 is mounted on an outer sidewall of the support cylinder 20. The PET detector module 10 includes: a detection module body 100 and mounting seats 200 connected to both ends of the detection module body 100, a surface of the mounting seat 200 distant from the support cylinder 20 being distant from the support cylinder 20 than a surface of the detection module body 100 distant from the support cylinder 20.

In particular, the support cylinder 20 serves as a structure for supporting and mounting the fixed PET detector modules 10. The PET detector module 10 is installed on the outer side wall of the support cylinder 20, the PET detector module 10 includes a detection module main body 100, the detection module main body 100 mainly realizes the detection function, and includes a detection part formed by a crystal unit, a photoelectric conversion unit and an electronic circuit which are electrically connected in sequence, and a support body and other structures for supporting the crystal unit, the photoelectric conversion unit and the electronic circuit. Illustratively, the crystal unit and the photoelectric conversion unit are arranged on one side of the support body close to the support cylinder 20, and the electronic circuit is arranged on one side of the crystal far from the support cylinder 20; wherein, the supporting body can be integrally formed with the mounting base 200 or can be detachably disposed. Further, the support body may include a heat dissipation or cooling structure for dissipating heat and cooling the detection member to ensure the working performance of the detection member.

The surface of the mount 200 away from the support cylinder 20 is farther from the support cylinder 20 than the surface of the detection module body 100 away from the support cylinder 20. It is understood that, regardless of the shape of the surface of the mounting seat 200 away from the support cylinder 20 or the shape of the surface of the detection module body 100 away from the support cylinder 20, any portion of the detection module body 100 away from the support cylinder 20 does not protrude from the mounting seat 200 in a direction away from the support cylinder 20. When the PET detector module 10 carried by the support cylinder 20 is mounted in the receiving hole 410, the detection module body 100 can be protected from being knocked by the mounting seat 200. Therefore, the main detection part of the PET detector module 10 is protected from being extruded and impacted, the normal use of the PET detector module 10 is ensured, and the detection precision of the PET detector module 10 is ensured.

In addition, compared with the conventional structure that the groove is designed on the outer side wall of the support cylinder 20 to mount the detector to protect the detector from being extruded or impacted, the PET detector module 10 of the invention does not need to design the groove on the outer side wall of the support cylinder 20 to mount the PET detector module 10, and the support cylinder 20 with smaller wall thickness can be used to directly fix and support the PET detector module 10. Therefore, the requirement on the wall thickness of the supporting cylinder body 20 is reduced, and the process requirement and the cost are effectively reduced.

Referring to fig. 3, a secondary support cylinder 30 is further included inside the support cylinder 20, and the secondary support cylinder 30 is concentric with the support cylinder 20. The outer side wall of the secondary support cylinder 30 is provided with a transmitting coil 50. The shielding layer is disposed on the inner wall of the support cylinder 20, and the farther the distance between the shielding layer and the transmitting coil 50 is, the higher the transmitting efficiency of the transmitting coil 50 is. Therefore, when the wall thickness of the support cylinder 20 is small, the distance between the shielding layer and the transmitting coil 50 is increased, and the transmitting efficiency of the transmitting coil 50 can be effectively improved. It will be appreciated that figure 1 is a simplified illustration relative to figure 3, primarily to show the positional relationship between the PET detector modules 10 and the support cylinder 20 and magnet coils 40.

In one embodiment, the surface of the mount 200 away from the support cylinder 20 is planar. At this time, regardless of the shape of the surface of the detection module main body 100 away from the support cylinder 20, it is only necessary that any portion of the detection module main body 100 away from the support cylinder 20 does not protrude from any point of the surface of the mounting base 200 away from the support cylinder 20 in the direction away from the support cylinder 20. In other embodiments, the surface of the mounting seat 200 away from the support cylinder 20 may also be an arc-shaped surface parallel to the outer sidewall of the support cylinder 20. Similarly, any part of the detection module main body 100 away from the support cylinder 20 may not protrude from the mounting seat 200 in the direction away from the support cylinder 20. Or the surface of the mount 200 remote from the support cylinder 20 may be a rugged surface.

In one embodiment, the surface of the detection module body 100 distal from the support cylinder 20 is planar. At this time, regardless of the shape of the surface of the mounting seat 200 away from the support cylinder 20, it is only necessary that any point of the surface of the detection module main body 100 away from the support cylinder 20 does not protrude from the mounting seat 200 in a direction away from the support cylinder 20. In other embodiments, the surface of the detection module body 100 away from the support cylinder 20 may also be an arc-shaped surface parallel to the outer side wall of the support cylinder 20. Or the surface of the detection module body 100 away from the support cylinder 20 may be an uneven surface.

The manner in which the PET detector modules 10 are mounted to the support cylinder 20 may be varied. Referring to fig. 1 and 2, as one practical way, the mount 200 is detachably coupled with the support cylinder 20. The detachable connection of the mounting seat 200 and the supporting cylinder 20 realizes the installation of the PET detector module 10 and the supporting cylinder 20, and the device has simple structure and easy design, and does not influence the receiving signal of the detector module. In other embodiments, the mounting of the PET detector modules 10 to the support cylinder 20 may also be accomplished by the connection of the detection module body 100 to the support cylinder 20.

Referring to fig. 1 and 2, in one embodiment, the mounting seat 200 is provided with a fixing hole 210, and the fixing hole 210 is used for penetrating a connecting piece connecting the mounting seat 200 and the support cylinder 20. It is understood that the fixing hole 210 may be provided through the mount 200 in a direction perpendicular to the outer sidewall of the support cylinder 20. The connecting piece can be a fixing screw, a fixing bolt or a pin and the like. Through design fixed orifices 210 on mount pad 200, utilize the connecting piece to wear to locate in fixed orifices 210 with mount pad 200 and support barrel 20 fixed connection, simple structure connects reliably, the dismouting of being convenient for.

Referring to fig. 2, further, the end of the fixing hole 210 away from the support cylinder 20 is a counter-sunk design. By designing the fixing hole 210 as a counter bore, the connecting member can be fixed on the mounting seat 200 and then does not protrude from the mounting seat 200, thereby improving the overall aesthetic property of the PET detector module 10 mounted on the support cylinder 20.

Referring to fig. 2, in one embodiment, the mounting seat 200 is provided with a positioning hole 220, and the positioning hole 220 penetrates through the mounting seat 200 in a direction perpendicular to the outer side wall of the support cylinder 20. The support cylinder 20 is provided with a positioning pin used in cooperation with the positioning hole 220, and the positioning hole 220 and the positioning pin are matched to ensure that the positions of the mounting seat 200 and the support cylinder 20 are relatively fixed before the mounting seat 200 and the support cylinder 20 are fixedly mounted, so that the PET detector module 10 can be conveniently positioned and mounted.

As a practical way, the mounting seat 200 and the detection module main body 100 may be integrally formed. The mounting seat 200 and the detection module main body 100 which are integrally formed are more reliably connected, and the risk that the detection module main body 100 falls off relative to the mounting seat 200 is avoided. In other embodiments, the mounting base 200 and the detection module body 100 may be detachably connected together. For example, a hook and a slot that are mutually snap-fitted are disposed between the mounting base 200 and the detection module main body 100, so as to connect the mounting base 200 and the detection module main body 100. Alternatively, the mounting seat 200 and the detection module body 100 may be connected together by a fastener such as a screw.

Referring to fig. 1 and 2, as an implementation manner, a surface of the mounting seat 200 opposite to the support cylinder 20 is provided with an avoiding groove 230, and the avoiding groove 230 is used for avoiding a protruding portion on the outer side wall of the support cylinder 20. The protruding part on the outer side wall of the support cylinder 20 may be some process bosses generated in the manufacturing process (pre-embedding, embedding) of the support cylinder 20. The groove 230 can be avoided through design, so that the convex part on the outer side wall of the support cylinder 20 can be avoided, the PET detector module 10 can be tightly attached to the support cylinder 20, and the installation space is saved.

Referring to fig. 3, in one embodiment, the PET-MR apparatus 01 further includes a magnet coil 40, the magnet coil 40 is provided with a receiving hole 410 extending in an axial direction of the magnet coil 40, and the support cylinder 20 is mounted in the receiving hole 410. The PET detector modules 10 are mounted on the side wall of the support cylinder 20 opposite the magnet coils 40 with a gap between the surface of the mount 200 remote from the support cylinder 20 and the magnet coils 40. The magnet coil 40 is formed by an MR magnet and an MR gradient coil, the MR gradient coil being located inside the MR magnet. The PET detector modules 10 are mounted on the side wall of the support cylinder 20 opposite the magnet coils 40, i.e., the PET detector modules 10 are located in the space between the support cylinder 20 and the MR gradient coils. After the PET detector module 10 and the support cylinder 20 are mounted, a gap is formed between the mounting seat 200 and the magnet coil 40, and the gap is necessarily larger than the gap between the detection module body 100 and the magnet coil 40. Therefore, when the support cylinder 20 carries the PET detector module 10 on the support cylinder to enter and exit the accommodating hole 410, the detection module main body 100 cannot be collided, so that the PET detector module 10 can be normally used and is not easy to damage.

In one embodiment, the number of PET detector modules 10 may be at least two. At least two PET detector modules 10 are arranged along the circumference of the support cylinder 20 on the outer side wall of the support cylinder 20 to form a detector ring. When the number of PET detector modules 10 is plural, a plurality of PET detector modules 10 may be arranged in a ring to form a detector ring. Alternatively, when the number of PET detector modules 10 is sufficiently large, the plurality of PET detector modules 10 may be organized into two or more detector rings, the two or more detector rings being arranged along the axial direction of the support cylinder 20. The two ends of each detector ring are both rings (supposedly called outer rings) formed by splicing corresponding to the mounting seats 200 of the PET detector modules 10, the middle part of each PET detector ring is a ring (supposedly called inner ring) formed by splicing corresponding to the detection module bodies 100 of the PET detector modules 10, and the outer diameter of the outer ring is larger than that of the inner ring. Therefore, the detection module main body 100 of the PET detector module 10 at any position on the circumference of the support cylinder 20 cannot collide with the inner hole of the magnet coil 010. Thereby effectively ensuring the normal use of the PET detector module 10 and the detector precision.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A PET-MR device comprising a PET detector module (10) and a support cylinder (20), the PET detector module (10) being mounted at an outer side wall of the support cylinder (20), characterized in that the PET detector module (10) comprises:

the detection module comprises a detection module main body (100) and mounting seats (200) connected to two ends of the detection module main body (100), wherein the surface, far away from the supporting cylinder (20), of each mounting seat (200) is far away from the supporting cylinder (20) compared with the surface, far away from the supporting cylinder (20), of each detection module main body (100), so that the mounting seats (200) can protect the detection module main bodies (100) from being collided, and the support cylinders (20) with small wall thickness can be used for directly and fixedly supporting the PET detector module (10);

inside the support cylinder (20), the PET detector module (10) further comprises a secondary support cylinder (30), the secondary support cylinder (30) being concentric with the support cylinder (20); the outer side wall of the secondary support cylinder (30) is provided with a transmitting coil (50), the inner wall of the support cylinder body (20) is provided with a shielding layer, and therefore when the wall thickness of the support cylinder body (20) is smaller, the distance between the shielding layer and the transmitting coil (50) is enlarged.

2. The PET-MR device according to claim 1, characterized in that the surface of the mount (200) and/or the detection module body (100) remote from the support cylinder (20) is planar.

3. The PET-MR device according to claim 1, wherein the detection module body (100) and the mount (200) are integrally formed or detachably provided.

4. The PET-MR device according to any one of claims 1 to 3, wherein the detection module body (100) includes a detection part and a support body for supporting the detection part, the support body and the mount (200) being integrally formed or detachably provided.

5. The PET-MR device according to claim 1, wherein the mount (200) is detachably connected with the support cylinder (20).

6. The PET-MR device according to claim 5, wherein the mounting base (200) is provided with fixing holes (210), the fixing holes (210) being used for penetrating and arranging connecting pieces for connecting the mounting base (200) and the support cylinder (20).

7. The PET-MR device as claimed in claim 6, characterized in that the end of the fixing bore (210) remote from the support cylinder (20) is of countersunk design.

8. The PET-MR device according to claim 1, wherein the mounting seat (200) is provided with positioning holes (220), the positioning holes (220) penetrating the mounting seat (200) in a direction perpendicular to an outer side wall of the support cylinder (20).

9. The PET-MR device according to claim 1, wherein the surface of the mounting seat (200) opposite to the support cylinder (20) is provided with an avoiding groove (230), the avoiding groove (230) being used to avoid a protruding portion on the outer side wall of the support cylinder (20).

10. The PET-MR device according to claim 1, further comprising a magnet coil (40), the magnet coil (40) being provided with a receiving hole (410) extending axially along the magnet coil (40), the support cylinder (20) being mounted in the receiving hole (410), the PET detector module (10) being mounted on a side wall of the support cylinder (20) opposite to the magnet coil (40), a surface of the mount (200) remote from the support cylinder (20) having a gap with the magnet coil (40).

11. The PET-MR device according to claim 1, wherein the number of the PET detector modules (10) is at least two, at least two of the PET detector modules (10) being arrayed along the circumference of the support cylinder (20) forming a detector ring on an outer side wall of the support cylinder (20).