CN210433855U

CN210433855U - Imaging device for radiation therapy

Info

Publication number: CN210433855U
Application number: CN201920448524.5U
Authority: CN
Inventors: 戴建荣; 牛传猛; 李明辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2020-05-01
Anticipated expiration: 2029-04-03

Abstract

The utility model relates to an imaging device for radiotherapy. According to a specific embodiment, the imaging device comprises: a lifting platform; the fixing frame is arranged on the lifting platform in a sliding manner; and an imaging module for imaging a target region of a patient; the imaging module is fixedly arranged on the fixing frame, and the lifting platform is configured to enable the imaging module to move up and down along the lifting platform along with the fixing frame. The utility model discloses can simulate the location and the formation of image is verified to the position of putting to the patient who accepts the treatment of fixed bundle of rays with standing or sitting posture, guarantee the accuracy of location, position, and can carry out real-time supervision to patient target area position in the treatment, guarantee the dose and deliver the precision to promote the clinical development of fixed bundle of rays radiotherapy technique better.

Description

Imaging device for radiation therapy

Technical Field

The present invention relates generally to the field of radiation therapy medicine, and more particularly, to an imaging device for beam radiation therapy, and more particularly, to a positioning, positioning and real-time monitoring imaging device for fixed beam radiation therapy.

Background

Radiotherapy plays an important role in the field of tumor therapy as one of conventional means of tumor therapy. According to the calculation, 60-70% of malignant tumors need to be treated by radiotherapy. At present, photon and electron beam technologies based on linear accelerator technology are widely adopted, and proton and heavy ion beam technologies based on cyclotron and synchrotron technologies are less applied. Compared with photons and electrons, the depth dose curve of protons and heavy ion beams has Bragg peaks, so that the depth dose curve has physical dosimetry advantages. Heavy ions also have a higher relative biological effect at the bragg peak position, which may result in a better physical dose distribution. Although proton and heavy ion radiotherapy have advantages, in order to be popularized and applied, the defects of large equipment, complex structure, high price, large occupied area and the like are also needed to be overcome.

The rotating frame is a mechanical motion device which realizes that the ray bundle rotates around the body of a patient and realizes fixed multi-angle or continuous rotating irradiation. At present, for photon and electron beam radiotherapy, the weight of a rotating rack of an accelerator is more than 1 ton, and the mechanical rotation is relatively easy to realize. For proton and heavy ion radiotherapy, the structure of the rotating frame of the accelerator is extremely complex and the weight of the rotating frame can reach hundreds of tons, so that the manufacturing and processing difficulty and the purchasing cost of proton and heavy ion radiotherapy equipment are greatly increased, and the accelerator is an important reason for hindering the popularization and application of proton and heavy ion technology. Therefore, the patent 'radiotherapy patient barrel type supporting and fixing method and device' (201510816153.8) discloses a radiotherapy patient barrel type supporting and fixing method and device, which is used for realizing the rotation of a standing or sitting patient and multidimensional movement in other directions to replace the rotation of an accelerator frame, thereby greatly reducing the complexity of radiotherapy equipment such as proton, heavy ion and the like, and converting the treatment mode of ray beam rotation and patient fixation into the treatment mode of ray beam fixation and patient rotation.

However, if a fixed beam, patient rotation treatment is used, two major problems need to be solved. Firstly, when the patient standing or sitting is subjected to simulated positioning to acquire positioning images of a target area and normal organs, the conventional imaging equipment such as CT, MRI and the like cannot be directly used, and specially-made imaging equipment such as vertical CT, MRI and the like needs to be equipped, so that the purchase cost is further increased undoubtedly and greatly. And secondly, the device for fixing the ray bundle does not have a rotating frame, the target area positioning verification before each treatment of the patient can only adopt orthogonal perspective imaging at present, and compared with the volume imaging which can be realized by the rotating frame, the defects of poor image quality, difficult positioning precision and the like exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides an imaging device for radiation therapy to solve above-mentioned bundle of rays two big problems that fixed, the rotatory treatment mode of patient exists, guarantee the accuracy of patient location, pendulum position, can accept radiotherapy's in-process real-time supervision target area position at the patient moreover, guarantee the dose and deliver the precision.

According to an exemplary embodiment of the present invention, an imaging apparatus for radiation therapy includes: a lifting platform; the fixing frame is arranged on the lifting platform in a sliding manner; and an imaging module for imaging a target region of a patient; the imaging module is fixedly arranged on the fixing frame, and the lifting platform is configured to enable the imaging module to move up and down along the lifting platform along with the fixing frame.

In some embodiments, the imaging module comprises at least one X-ray imaging unit, each imaging unit comprising a source of radiation and a detector.

In some embodiments, the imaging module includes a first imaging unit, the first imaging unit includes a first radiation source and a first detector, and the first radiation source and the first detector are relatively and fixedly disposed on the fixing frame.

In some embodiments, the imaging module further includes a second imaging unit, the second imaging unit includes a second radiation source and a second detector, the second radiation source and the second detector are relatively and fixedly disposed on the fixing frame, and a central axis of a radiation beam of the first radiation source and a central axis of a radiation beam of the second radiation source perpendicularly intersect in a same horizontal plane.

In some embodiments, wherein the imaging module is a magnetic resonance imaging unit, the imaging module can be used for magnetic resonance imaging of a patient to achieve simulated positioning, setup verification, or real-time monitoring of a target region of the patient.

In some embodiments, the magnetic resonance imaging unit is a hollow cylindrical magnetic resonance coil fixedly arranged on the fixing frame.

In some embodiments, the magnetic resonance imaging unit includes a first magnet and a second magnet, and the first magnet and the second magnet are fixedly arranged on two sides of the fixing frame in parallel and oppositely.

In some embodiments, the external surface of the fixing frame is fixedly provided with one or more sliding grooves and at least one lead screw nut.

In some embodiments, the lifting platform includes a fixed seat, a guide rail, and a lifting driving part, the guide rail and the lifting driving part are fixedly disposed on the fixed seat, the fixed seat is fixedly disposed on a ceiling of the radiotherapy machine room, the guide rail is slidably disposed in a sliding groove on the fixed frame, and the number of the guide rail is the same as the number of the sliding groove on the fixed frame.

In some embodiments, the lifting driving component includes an actuator, a coupler, a lead screw, an angle sensor, and a rotation transmission component, the power output shaft of the actuator is connected to the lead screw through the coupler, the lead screw and a lead screw nut on the fixed frame form a lead screw nut pair, and the angle sensor is connected to the lead screw through the rotation transmission component to realize synchronous rotation with the lead screw.

In some embodiments, the power source of the actuator is electric, pneumatic or hydraulic, the angle sensor is an encoder, a potentiometer or other sensor that can be used for angle measurement, and the rotation transmission component is a synchronous belt drive, a gear drive or other rotation transmission means.

According to another exemplary embodiment of the present invention, an imaging apparatus for radiation therapy comprises: a lifting unit; a hanger slidably provided on the lifting unit; and an imaging module including a radiation generating unit and a detecting unit; wherein one of the radiation generating unit or the detecting unit is fixedly arranged on the hanger, the other one is fixedly arranged at a preset position, and the lifting unit is configured to enable one of the radiation generating unit or the detecting unit to move up and down along the lifting unit along with the hanger. In a specific example, the radiation generating unit is fixedly provided on the hanger, the detecting unit is fixedly provided at a predetermined position, which may be fixed with respect to the radiation head, for example, and the detecting unit and the radiation head are integrally mounted and fixed, in which case the accuracy of the apparatus as a whole can be improved.

In some embodiments, the imaging module includes a first imaging module and a second imaging module, the first imaging module includes a first radiation generating unit and a first detecting unit, the second imaging module includes a second radiation generating unit and a second detecting unit, and the first radiation generating unit and the second radiation generating unit can be lowered to a fixed position along the lifting unit, so that the first radiation generating unit is aligned with the first detecting unit, and the second radiation generating unit is aligned with the second detecting unit.

In some embodiments, the imaging module comprising the first and second imaging modules may be an X-ray imaging unit. For example, the first and second radiation generating units may both be X-ray sources and may generate X-rays of different energies. Preferably, fan-beam or cone-beam X-ray imaging may be used for performing Computed Tomography (CT) imaging, and also for performing four-dimensional CT imaging by tracking the position of the patient's diaphragm for simulated positioning, setup verification, or real-time monitoring of the patient's target volume.

In some embodiments, the lifting unit comprises a fixed seat, a guide rod and a lifting driving part, wherein the guide rod and the lifting driving part are fixedly arranged on the fixed seat, and the fixed seat is fixedly arranged on the ceiling of the machine room.

In some embodiments, the hanger is in the shape of a circular arc, one or more sliding grooves and at least one lead screw nut are fixedly arranged on the hanger, the guide rods are slidably arranged in the sliding grooves of the hanger, and the number of the guide rods is consistent with the number of the sliding grooves.

The utility model has the advantages that: the utility model discloses can simulate location and the formation of image of verification of putting to the patient who accepts fixed beam treatment with standing or sitting posture, guarantee the accuracy of location, putting, and can carry out real-time supervision to patient target area position in the treatment, guarantee the dose and deliver the precision to promote the clinical development of fixed bundle of rays radiotherapy technique better.

Drawings

Fig. 1 is a schematic view of an initial state of an image forming apparatus according to an embodiment of the present invention;

fig. 2 is a schematic view of an imaging state of an imaging apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a dual image forming unit of an image forming apparatus according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a single imaging unit of an imaging apparatus according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a magnetic resonance imaging coil structure of an imaging apparatus according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a magnetic resonance imaging magnet of an imaging apparatus according to an embodiment of the present invention;

fig. 7 is a schematic view of an initial state of an image forming apparatus according to another embodiment of the present invention;

fig. 8 is a schematic view of an image forming state of an image forming apparatus according to another embodiment of the present invention;

fig. 9 is a schematic structural view of a fixing base of an image forming apparatus according to another embodiment of the present invention;

fig. 10 is a flow chart of an imaging method for radiation therapy according to an embodiment of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings. In the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted.

Fig. 1 shows an imaging apparatus for radiation therapy according to an embodiment of the present invention, in an initial state. As shown in fig. 1, an imaging apparatus for fixed beam radiotherapy according to an embodiment of the present invention comprises: a lifting platform 300; a fixed frame 200 slidably disposed on the elevating platform 300; and an imaging module 100 for imaging a target region of a patient; wherein, the imaging module 100 is fixedly disposed on the fixing frame 200, and the lifting platform 300 is configured to enable the imaging module 100 to move up and down along the lifting platform 300 with the fixing frame 200.

Fig. 2 shows an imaging apparatus for radiation therapy according to an embodiment of the present invention, in an imaging state. As shown in fig. 2, the fixing frame 200 can perform a linear motion along the lifting platform 300, for example, in a vertical direction, and the linear motion drives the imaging module 100 to perform a lifting motion, so that the imaging module 100 can slide and stay at any position, and thus different patients can be imaged according to clinical requirements.

Although the mounting and fixing manner of the lifting platform 300 is not shown in fig. 1-2, it is understood that it can be fixed in any manner in the radiotherapy room, for example, the lifting platform 300 can be fixedly arranged on the ceiling of the radiotherapy room.

Referring to fig. 1-2, the lifting platform 300 includes a fixing base 310, a plurality of

guide rails

321 and 323, and at least one lifting driving part 330, wherein the first guide rail 321, the second guide rail 322, the third guide rail 323, and the lifting driving part 330 are all fixedly disposed on the fixing base 310, and the fixing base 310 is fixedly disposed on the ceiling.

To achieve the elevating movement of the fixing frame and the imaging module, the elevating driving part 330 may include an actuator 331, a lead screw 332, a coupling, an angle sensor, and a rotation transmitting part. The power output shaft of the actuator 331 is fixedly connected with the lead screw 332 through a coupler, and the lead screw 332 and the corresponding lead screw nut on the fixing frame 200 can form a lead screw nut pair, so that the rotary motion of the lead screw is converted into the linear motion of the fixing frame 200. The angle sensor may be installed, for example, at both ends of the lead screw, and an input shaft thereof is connected to the lead screw 332 through a rotation transmission member to achieve synchronous rotation with the lead screw 332 and measure a rotation angle value of the lead screw.

Although the lifting driving part 330 is shown as one, it is understood that a plurality of lifting driving parts may be provided, for example, two guide rails and two lifting driving parts are provided, which are fixedly distributed on the circular fixing base 310 at 90 ° to each other, and the two guide rails are disposed opposite to each other, and the two lifting driving parts are also disposed opposite to each other; in some examples, the power source of the actuator 331 may be electrically, pneumatically, or hydraulically powered. The angle sensor may be an encoder, potentiometer or other sensor that may be used for angle measurement. The rotation transmitting member 335 may be a synchronous belt drive, a gear drive, or other rotation transmitting means.

The fixing frame 200 has a cylindrical structure, the cross section of which may be circular or square, and the outer surface of which is fixedly provided with one or more sliding

grooves

210 and 230 and at least one lead screw nut 240. Referring to fig. 3 to 4, the first sliding groove 210, the second sliding groove 220, the third sliding groove 230 and the lead screw nut 240 are fixedly distributed on the circular fixing frame 200 at 90 ° to each other. In order to realize the lifting movement of the fixing frame, the

guide rails

321 and 323 of the lifting platform 300 are slidably disposed in the sliding

grooves

210 and 230 of the fixing frame 200, and the number of the guide rails is the same as that of the sliding grooves. The upper surface of the sliding groove is flush with the upper surface of the screw nut, and both are higher than the upper surface of the fixing frame 200.

The fixing frame 200 is provided with a treatment window 250, so that when the imaging module 100 performs real-time monitoring imaging on the target area of the patient during treatment, the radiation beam of the radiation head can pass through the treatment window to irradiate the patient. In the illustration, the treatment window 250 may be disposed directly below a chute or lead screw nut 240 to further facilitate the mounting of the imaging module. The radiation source of the radiation head may be an x-ray source or an electron beam source generated by a linear accelerator, or a gamma ray source generated by a radioactive substance.

Referring to fig. 1-2, the imaging apparatus of the present invention may be advantageously applied to patients undergoing fixed beam therapy in a standing or sitting position. In an imaging state, the patient 500 may be placed on the motion platform 700 capable of lifting and rotating, the fixing frame 200 may descend along with the lifting platform 300 to surround the motion platform 700, the ray bundle emitted by the imaging module 100 passes through the vicinity of the target area of the patient, and the motion of the motion platform 700 may be matched to implement, for example, CT or four-dimensional CT imaging; after imaging is completed, the elevation platform can be adjusted by elevation motion so that the ray beam of the linac radiation head 400 can pass through the isocenter 600 of the target area of the patient. The moving platform 700 is disposed directly below the elevating platform 300 and the fixing frame 200. with respect to the moving platform 700, reference may be made to the chinese patent application CN201510816153.8 ("radiotherapy patient barrel supporting and fixing method and device") of the present invention, which is incorporated herein by reference in its entirety. More specific description will be made later herein with respect to the imaging method.

Imaging module 100 may be configured as an X-ray imaging that includes at least one X-ray imaging unit, each imaging unit including a source of radiation and a detector. For example, fan beam or cone beam X-ray imaging may be used for performing Computed Tomography (CT) imaging, and may also be used for performing four-dimensional CT imaging by tracking the position of the patient's diaphragm to enable simulated positioning, setup verification, or real-time monitoring of the patient's target volume.

As shown in fig. 3, the imaging module 100 includes two imaging units, i.e., a first imaging unit 110 and a second imaging unit 120. The

imaging units

110 and 120 are orthogonally fixed to the fixing frame 200 at 90 °. The first imaging unit 110 includes a first radiation source 111, a first detector 112. The first radiation source 111 and the first detector 112 are fixed to the fixing frame 200 to face each other. The central axis of the beam of rays of the first radiation source 111 constitutes the central axis 113 of the first imaging unit. The second imaging unit 120 includes a second radiation source 121, a second detector 122. The second radiation source 121 and the second detector 122 are fixed on the fixing frame 200 opposite to each other. The central axis of the beam of the second radiation source 121 constitutes the central axis 123 of the second imaging unit. The central axes of the first imaging unit 110 and the second imaging unit 120 perpendicularly intersect in the same horizontal plane. In an embodiment, the first radiation source 111 and the second radiation source 121 are both X-ray sources and can generate X-rays with different energies, for example, the first radiation source 111 is an MV-level radiation source, and the second radiation source 121 is a KV-level radiation source.

In some examples, imaging module 100 may also include only one imaging unit. As shown in fig. 4, the first imaging unit 110 includes a first radiation source 111, a first detector 112. The first radiation source 111 (e.g., X-ray) and the first detector 112 are fixedly disposed on the stationary frame 200 opposite to each other. The fixing frame 200 is a cylindrical structure, the cross section of which is a chamfer square, and is provided with a sliding groove 210 and a sliding groove 230 on three sides, and a screw nut 240 on one side. The treatment window is disposed directly below the sliding groove 230, whereby the central axis 113 of the radiation beam generated by the first radiation source 111 can be spatially perpendicular to the central axis of the treatment radiation beam.

In order to realize the formation of image to the different positions of patient, the utility model provides an imaging module 100 also can be configured to the magnetic resonance imaging unit to be used for the magnetic resonance imaging to the patient, realize the simulation location to patient's target area, the pendulum position is verified or real-time supervision.

In some examples, as shown in fig. 5, the magnetic resonance imaging unit may be a hollow cylindrical magnetic resonance coil, and the fixing frame 200 is also a hollow cylindrical, and the magnetic resonance coil 100 is fixedly disposed on an inner wall of the fixing frame 200. A treatment window 130 is cut in the side wall of the magnetic resonance coil 100. In real-time monitoring imaging during treatment of a target region of a patient, a radiation beam may pass through the treatment couch 250 of the gantry 200 and the treatment window 130 of the magnetic resonance coil to irradiate the patient.

In some examples, as shown in fig. 6, the magnetic resonance imaging unit includes a first magnet 140 and a second magnet 150 which are oppositely arranged, and the first magnet and the second magnet may be rectangular and are fixedly arranged on two sides of the fixing frame 200 in parallel and oppositely. In real-time monitoring imaging during treatment of a target region of a patient, a beam of radiation may be passed between the first and second magnets and directed at the patient.

If the imaging module 100 is configured for X-ray imaging, the external surface of the fixing frame 200 is fixedly provided with a first sliding groove 210, a second sliding groove 220, a third sliding groove 230, and a lead screw nut 240, as shown in fig. 3-4. If the imaging module 100 is configured for magnetic resonance imaging, the external surface of the fixing frame 200 is fixedly provided with a first sliding groove 21), a third sliding groove 230, a first lead screw nut 240, and a second lead screw nut 260, in which case, the first and third sliding grooves are opposite to each other, and the first and second lead screw nuts are opposite to each other, as shown in fig. 5-6. A treatment window 250 is opened on the fixing frame 200, and when the imaging module 100 performs real-time monitoring imaging on the target area of the patient during treatment, the radiation beam can pass through the treatment window 250 to irradiate the patient.

Accordingly, if the imaging module 100 is configured for X-ray imaging, the lifting platform 300 includes a fixing base 310, a first guiding rail 321, a second guiding rail 322, a third guiding rail 323, and a lifting driving component 330, as shown in fig. 1-2. The first, second, and third guide rails and the lifting driving part 330 are all fixedly disposed on the fixing base 310, and the fixing base 310 is fixedly disposed on the ceiling. All the guide rails are slidably disposed in the corresponding sliding grooves of the fixing frame 200. If the imaging module 100 is configured for magnetic resonance imaging, the lifting platform 300 includes a fixing base 310, a first guiding rail 321, a third guiding rail 323, a first lifting driving component 330, and a second lifting driving component 340. The first guide rail, the third guide rail, the first lifting driving part and the second lifting driving part are fixedly arranged on the fixed seat 310, the fixed seat 310 is fixedly arranged on a ceiling, the first guide rail and the third guide rail are arranged oppositely, and the first lifting driving part and the second lifting driving part are arranged oppositely. The two lifting driving parts have the same structure. All the guide rails are slidably disposed in the corresponding sliding grooves of the fixing frame 200.

Figures 7-9 illustrate another embodiment of the imaging apparatus of the present invention suitable for use in beam radiotherapy.

As shown in fig. 7, a positioning, positioning and real-time monitoring imaging device for fixed beam radiotherapy comprises: a lifting unit 3000; a hanger 3100 slidably provided on the lifting unit 3000; and an imaging module including a radiation generating unit 2000 and a detecting unit 1000; wherein the radiation generating unit 2000 is fixedly disposed on the hanger 3100, the detecting unit 1000 is fixedly disposed at a predetermined position with respect to the radiation head 400, and the elevation unit 3000 is configured such that the radiation generating unit or the detecting unit in the imaging module can be moved up and down along the elevation unit 3000 with the hanger 3100.

In a specific example, the radiation generating unit 2000 of the imaging module may be fixedly installed on the hanger, the detecting unit 1000 may be fixedly installed on the wall of the machine room and arranged at both sides of the radiation head 400, and the lifting unit 3000 may be fixedly installed on the ceiling of the machine room. Wherein the detecting unit 1000 and the radiation head 400 are integrally mounted and fixed, so that the accuracy of the whole imaging apparatus can be improved.

As shown in fig. 9, the lifting unit 3000 includes a holder 3200, at least one guide bar 3210, and a lifting driving part 3300. The fixed setting of lift driver part 3300 is on fixing base 3200, and the fixed setting of fixing base 3200 is on the ceiling.

The

guide rods

3210 and 3220 are vertically arranged on the lower surface of the fixed seat 3200; to achieve the lifting movement of the hanger 3100, in a specific example, the lifting driving part 3300 includes a lead screw 3310, an actuator 3330, a coupling, an angle sensor, a rotation transmitting part. The power output shaft of the actuator 3330 is fixedly connected with the lead screw 3310 through a coupler, and the lead screw 3310 and the lead screw nut 3140 on the hanger 3100 form a lead screw nut pair. The angle sensor input shaft is connected to the lead screw 3310 through a rotation transmitting member to achieve synchronous rotation with the lead screw.

In a particular example, the power source for actuator 3330 may be electric, pneumatic, or hydraulic. The angle sensor may be an encoder, potentiometer or other sensor that may be used for angle measurement. The rotation transmission part can be a synchronous belt transmission, a gear transmission or other rotation transmission modes.

The hanging bracket 3100 is slidably disposed on the fixing base 3200, as shown in fig. 7-8, the hanging bracket 3100 is in a circular arc shape with an angle of, for example, 120-. The hanger is fixedly provided with a first sliding groove 3120, a second sliding groove 3130 and a lead screw nut 3140. The fixing base 3200 is provided with a first guide rod 3210 and a second guide rod 3220, and the two guide rods are slidably disposed in the corresponding hanger sliding grooves. It is to be understood that the number of the slide grooves and the guide bars is not limited to 2, but may be 3 or more as long as the number of the guide bars coincides with the number of the slide grooves.

The imaging module may be provided with a plurality of imaging components, for example two. Wherein the detection unit 1000 comprises a first detection unit 1100 and a second detection unit 1200, the first detection unit 1100 and the second detection unit 1200 being orthogonally arranged on the left and right sides of the radiation head 400. The radiation generating unit 2000 includes a first radiation source 2100 and a second radiation source 2200, and the first radiation source 2100 and the second radiation source 2200 are orthogonally disposed on the gantry 310. The first radiation source 2100 and the first detection unit 1100 cooperate to form a first imaging assembly, and the second radiation source 2200 and the second detection unit 1200 cooperate to form a second imaging assembly. The first and

second radiation sources

2100, 2200 are both X-ray sources and may generate X-rays of different energies. The radiation generating unit 2000 can be lowered to a fixed position along the lifting unit 3000, such that the first radiation source 2100 faces the first detecting unit 1100, the second radiation source 2200 faces the second detecting unit 1200, and the central axes of the radiation beams of the first and second radiation sources intersect with the central axis of the radiation head in the same horizontal plane.

The detecting unit and the ray generating unit in the present embodiment may have the same structure and function as the detector and the ray source in the previous embodiment. In a specific example, as shown in fig. 8, the first detection unit and the detection unit are orthogonally arranged on both sides of the radiation head; the first ray generating unit and the second ray generating unit are orthogonally arranged on the lifting unit, namely the central axes of ray bundles of the first ray generating unit and the second ray generating unit are orthogonal, and both the central axes of the ray bundles of the first ray generating unit and the central axes of the ray bundles of the second ray generating unit and the central axes of the therapeutic rays emitted by the radiation head can be intersected in the same horizontal plane.

In an example, the first imaging assembly and the second imaging assembly can both use fan-beam or cone-beam X-ray to realize Computed Tomography (CT) imaging, and can also be used for realizing four-dimensional CT imaging by tracking the position of the diaphragm of the patient so as to realize simulated positioning, setup verification or real-time monitoring of the target area of the patient.

According to the utility model discloses an imaging device for radiation therapy, can use current imaging equipment such as conventional CT, MRI, can reduce imaging equipment cost by a wide margin, can carry out the formation of image monitoring in real time at the radiation therapy in-process simultaneously to thereby can adjust the delivery dose of accurate control to target area or its surrounding organs to location and pendulum position accurately, guarantee the effect of radiotherapy in the art effectively.

Fig. 10 shows a flow diagram of an imaging method for radiation therapy according to an embodiment of the invention. As shown in fig. 10, a method according to an embodiment of the present invention may include: step S810, fixedly placing the patient on an imaging platform such as a lifting and rotating motion platform, and enabling the patient to lift or rotate along with the motion platform; step S820, adjusting the lifting platform to enable the imaging module and the patient to be in a preset relative position; and a step S830 of imaging the target region of the patient with the imaging module.

In step S810, the patient is driven by the motion platform to move up and down, so that the central axis of the motion platform and the therapeutic radiation beam emitted by the radiation head can intersect at or near the isocenter of the target region of the patient.

The motion platform used in this embodiment can be found in, for example, chinese patent application CN201510816153.8 of the present inventor, which includes: motion platform, lift footboard, treatment bucket etc. and motion platform is used for carrying on the treatment bucket and realizes various movements such as whole lift, translation, rotation, slope, and the lift footboard is connected with motion platform, and accessible elevating system adjusts the height of patient in the treatment bucket, and the treatment bucket is the bucket formula structure, and the accessible carries out moulding behind the shaping material parcel patient after the closure, realizes human supporting completely and fixes.

The imaging process of the present invention is described below in conjunction with fig. 1-2.

As shown in fig. 1, at this time, the imaging device is in an initial state, and the patient 500 is fixedly supported in a moving platform such as a barrel-type supporting device 700, and is fixedly connected with the barrel, and can rotate, lift, tilt and the like along with the barrel. The imaging module 100 slides along the elevating platform 300 to the uppermost end, so that the imaging module 100 is in the retracted state. The center axis of the barrel support 700, the center axis of the radiation head 400, and the center axis of the imaging module 100 intersect perpendicularly at the isocenter 600.

In one specific example, the imaging module 100 may employ an X-ray imaging unit, and accordingly, the elevating platform 300 is adjusted in step S820 such that the central axis of the X-ray beam intersects the therapeutic radiation beam emitted by the radiation head at the isocenter 600 of the target area of the patient.

Specifically, as shown in fig. 2, when the imaging device is in an imaging state, the imaging module 100 can slide along the lifting platform 300, and it can be determined whether the imaging module 100 and the patient 500 are in a predetermined relative position according to the measurement data of the angle sensor on the lifting platform 300, for example, the position of the central axis of the ray bundle of the two ray sources relative to the patient 500 can be calculated by combining the numerical value of the angle sensor with the parameters such as the screw pitch of the lead screw 332, so as to image the patient 500 according to the clinical requirement. The operation of the actuator is controlled by the numerical value of the angle sensor, which dispenses with frequent manual checking operations, enabling the imaging operation of the predetermined target region to be rapidly achieved.

If the first and second imaging units are configured to perform CT or four-dimensional CT, the imaging module uses an X-ray imaging unit, specifically, the imaging module uses a fan beam or a cone beam to perform Computed Tomography (CT) imaging on the patient, and may also perform four-dimensional CT imaging by tracking the position of the patient's diaphragm. Through the bucket formula strutting arrangement 700 drive patient 500 and go on lifting and rotary motion, the lifting motion of cooperation lift platform, this imaging device can realize the CT or the four-dimensional CT formation of image to patient 500 to realize simulation location, pendulum position verification or real-time supervision. If the imaging module 100 is configured to perform magnetic resonance imaging, the imaging module employs a magnetic resonance imaging unit, which includes a radio frequency coil and a receiving coil, and the radio frequency coil sends a radio frequency signal, and the receiving coil receives the radio frequency signal to perform CT imaging, or obtains a breathing curve of a patient by reading a signal change at a position of a patient septum, and performs four-dimensional magnetic resonance imaging. By matching the lifting motion of the barrel-type supporting device 700 with the lifting motion of the lifting platform 300, the patient and the imaging module 100 can be in the relative position capable of magnetic resonance imaging, so as to perform simulation positioning based on the magnetic resonance imaging principle, positioning verification or real-time monitoring imaging in treatment. Therefore, the positions of tumors, normal tissues, important organs and the like in the images are determined, and then a radiotherapy planning system and the obtained images can be used for designing an intra-operative radiotherapy plan and determining the irradiation dose and the irradiation time. After the imaging is finished, the imaging module 100 may be lifted to the uppermost position along the lifting platform 300, i.e., returned to the initial state. If real-time monitoring imaging of the patient is required, the imaging module 100 can be maintained in an imaging state and perform real-time monitoring imaging of the patient according to clinical requirements, and the radiation beam irradiates the patient through the treatment window 250.

The other imaging device of the present invention can also be used to perform imaging of the target area, as shown in fig. 7, the imaging device is in the initial state. The patient 500 is fixedly supported in the barrel support 700 and is fixedly connected to the barrel to rotate, lift, tilt, etc. with the barrel. The center axis of the barrel support 700 and the center axis of the radiation head 400 intersect perpendicularly at the isocenter 4000. The radiation generating unit 2000 slides to the uppermost end along the elevating unit 3000 to place the imaging apparatus in an initial stowed state.

As shown in fig. 8, the imaging apparatus is in an imaging state, and the radiation generating unit 2000 slides along the elevating unit 3000 to a fixed imaging position calibrated by the angle sensor, at which time, the central axes of the first and

second radiation sources

2100 and 2200 both pass through the isocenter 4000. It can be understood that, if the first and second imaging assemblies are configured to perform CT or four-dimensional CT, the barrel supporting device 700 drives the patient 500 to perform lifting and rotating motions, and the imaging device can perform CT or four-dimensional CT imaging on the patient 500 to achieve simulated positioning, positioning verification or real-time monitoring. After the imaging of the patient is completed, the radiation generating unit 2000 may be lifted to the uppermost portion along the elevating platform 3000, i.e., returned to the initial state. If the patient needs to be monitored and imaged in real time, the radiation generating unit 2000 can be kept in an imaging state, and the patient can be monitored and imaged in real time according to clinical requirements.

The principles of the present invention have been described above with reference to specific embodiments. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but that many modifications and changes in form and detail may be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An imaging apparatus for radiation therapy, comprising:

a lifting platform;

the fixing frame is arranged on the lifting platform in a sliding manner; and

an imaging module for imaging a target region of a patient;

the imaging module is fixedly arranged on the fixing frame, and the lifting platform is configured to enable the imaging module to move up and down along the lifting platform along with the fixing frame.

2. The imaging apparatus of claim 1, wherein the imaging module comprises at least one X-ray imaging unit, each imaging unit comprising a source of radiation and a detector.

3. The imaging apparatus of claim 2, wherein the imaging module comprises a first imaging unit, the first imaging unit comprises a first radiation source and a first detector, and the first radiation source and the first detector are relatively fixedly disposed on the fixed frame.

4. The imaging apparatus of claim 3, wherein the imaging module further comprises a second imaging unit, the second imaging unit comprises a second radiation source and a second detector, the second radiation source and the second detector are relatively and fixedly disposed on the fixing frame, and a central axis of the radiation beam of the first radiation source and a central axis of the radiation beam of the second radiation source perpendicularly intersect in the same horizontal plane.

5. The imaging apparatus of claim 1, wherein the imaging module is a magnetic resonance imaging unit.

6. The imaging apparatus of claim 5, wherein the magnetic resonance imaging unit is a hollow cylindrical magnetic resonance coil fixedly disposed on the fixing frame; or the magnetic resonance imaging unit comprises a first magnet and a second magnet, and the first magnet and the second magnet are fixedly arranged on two sides of the fixing frame in parallel and oppositely.

7. The imaging apparatus of claim 1, wherein the mount outer surface is fixedly provided with one or more sliding grooves and at least one lead screw nut.

8. The image forming apparatus as claimed in claim 1, wherein the elevating platform includes a fixing base, a guide rail, and an elevating driving part, the guide rail and the elevating driving part are fixedly disposed on the fixing base, the fixing base is fixedly disposed on a ceiling of a machine room, the guide rail is slidably disposed in a sliding groove on the fixing frame, and the number of the guide rail is identical to the number of the sliding groove on the fixing frame.

9. The imaging device as claimed in claim 8, wherein the lifting driving member includes an actuator, a coupling, a lead screw, an angle sensor, and a rotation transmission member, the power output shaft of the actuator is connected to the lead screw through the coupling, the lead screw and the lead screw nut on the fixing frame form a lead screw nut pair, and the angle sensor is connected to the lead screw through the rotation transmission member to realize synchronous rotation with the lead screw.

10. An imaging apparatus for radiation therapy, comprising:

a lifting unit;

a hanger slidably provided on the lifting unit; and

an imaging module including a radiation generating unit and a detecting unit;

wherein one of the radiation generating unit or the detecting unit is fixedly arranged on the hanger, the other one is fixedly arranged at a preset position, and the lifting unit is configured to enable one of the radiation generating unit or the detecting unit to move up and down along the lifting unit along with the hanger.

11. The imaging apparatus of claim 10, wherein the imaging module comprises a first imaging module and a second imaging module, the first imaging module comprises a first radiation generating unit and a first detecting unit, the second imaging module comprises a second radiation generating unit and a second detecting unit, the first radiation generating unit and the second radiation generating unit can be lowered to a fixed position along the lifting unit, so that the first radiation generating unit is aligned with the first detecting unit, and the second radiation generating unit is aligned with the second detecting unit.

12. The image forming apparatus as claimed in claim 10, wherein the lifting unit includes a fixing base, a guide bar, and a lifting driving part, the guide bar and the lifting driving part being fixedly provided on the fixing base, the fixing base being fixedly provided on a ceiling of the machine room.

13. The image forming apparatus as claimed in claim 12, wherein the hanger is formed in a circular arc shape, one or more sliding grooves and at least one lead screw nut are fixedly provided on the hanger, the guide bars are slidably provided in the sliding grooves of the hanger, and the number of the guide bars corresponds to the number of the sliding grooves.

14. The image forming apparatus as claimed in claim 13, wherein the elevating driving means includes an actuator, a coupling, a lead screw, an angle sensor, and a rotation transmitting means, the actuator power output shaft is connected to the lead screw through the coupling, the lead screw and a lead screw nut on the hanger constitute a lead screw nut pair, and the angle sensor is connected to the lead screw through the rotation transmitting means to achieve synchronous rotation with the lead screw.

15. The image forming apparatus as claimed in claim 14, wherein a power source of the actuator is electric, pneumatic or hydraulic, the angle sensor is an encoder or a potentiometer, and the rotation transmitting member is a synchronous belt drive or a gear drive.