CN208838900U - A kind of CT device in situ in radiotherapy - Google Patents

Abstract

A kind of CT device in situ in radiotherapy, including rotary frame and the radiotherapy head being arranged on the rotary frame, it is characterized by: being additionally provided with CT device on the rotary frame or the CT device is arranged on the CT rotation ring stand of the rotary frame center axis rotation；The isocenter point of the X-ray of the CT device is overlapped with the isocenter point for the treatment beam that the radiotherapy head is emitted.The utility model is the CT in situ by being integrated on radiotherapy rotary frame, can directly carry out location verification to tumour ontology, realize high-precision pendulum position.And the tumor image of spiral CT is clear, can be used for the variation of in-situ monitoring tumour in treatment course.It can also realize that original position does radiotherapy planning and when the variation of tumour is big, does radiotherapy planning again.The utility model X-ray tube is specifically designed, so that the visual field along human body longitudinal direction is very wide, can be turned around in rack and just be covered most of tumours and human organ.

Description

A kind of CT device in situ in radiotherapy

Technical field

The utility model belongs to technical field of medical equipment, more particularly to the CT device in situ in a kind of radiotherapy.

Background technique

In the equipment of particle radiation therapy cancer, in order to realize that beam from multiple angular illumination patient cancers, makes Dosage on tumor target, which realizes, runs up to required high level, and dosage suffered by the normal tissue of surrounding is shone due to dispersion It penetrates, low-level can be remained to, so that the purpose that normal tissue is injury-free.Generally, beam can be gone out beam treatment head peace In the rack of rotation.In this way, the rotation for passing through rack, so that it may realize beam from multiple angular illumination patient cancer portions Position.Before this radiotherapy, it (is exactly that tumour to be treated is accurately put into treatment position that pendulum position is carried out to patient On) and position verifying.Generally, the verifying of position or is mounted in the rack of rotation using the spiral CT in therapeutic room Conical beam CT (CBCT) or orthogonal X-ray photography realize.If usually to be tested with the spiral CT in therapeutic room After card, then with manipulator or therapeutic bed patient is transported to treatment position.This significantly, the movement of long range, entirely lean on machine Tool hand is highly difficult come the precision of the pendulum position guaranteed.If using CBCT or orthogonal X- in the rack for being mounted on rotation Ray photography, is verified, since the image of current CBCT and orthogonal X-ray photographs can't clearly differentiate soft group The boundary with tumour is knitted, the verifying of pendulum position is realized by bone features or implantable marker object, since soft tissue and tumour are opposite Bone has movement caused by internal organs movement, so the precision of the pendulum position of tumour is limited.

Utility model content

The utility model aim is that in view of the drawbacks of the prior art, position can directly be carried out to tumour ontology by providing one kind Set verifying, and can be used for the variation of in-situ monitoring tumour in treatment course, can also realize it is in situ do radiotherapy planning and When big variation occurs for tumour, the CT device in situ in the radiotherapy of radiotherapy planning is done again.

The utility model to achieve the above object, adopts the following technical scheme that

CT device in situ in a kind of radiotherapy, including rotary frame and the radiotherapy being arranged on the rotary frame Head, it is characterised in that: be additionally provided with CT device on the rotary frame or the CT device is arranged in the rotary frame On the CT rotation ring stand of mandrel rotation；The treatment ray of the isocenter point of the X ray of the CT device and radiotherapy head outgoing The isocenter point of beam is overlapped；The CT device includes X-ray tube and CT detector；The X-ray tube and CT detector are set respectively It sets in opposite two sides.

It is further characterized by: the CT detector physical width is greater than 10cm.

Further: the CT detector is 16 to 320 row's detectors.

A kind of form of X-ray tube: the X-ray tube includes cathode, anode；The anode is length along human body longitudinal direction Bar shaped, arc or polygon；It is provided with electromagnetic control apparatus between the cathode and anode, for by the electricity of the emission of cathode Beamlet quickly focuses on the different location of anode by electromagnetic field control.

For the anode together with the cage connection of X-ray tube, the anode is directly cooling by liquid or liquid metal.

A kind of CT working method: the CT detector is moved back and forth along human body longitudinal direction.

Another way: the X-ray tube of the CT device is moved back and forth along human body longitudinal direction.

There are also a kind of modes: the rotary frame center has the therapeutic bed moved along human body longitudinal direction.

There are also a kind of modes: the CT rotation ring stand is moved back and forth along rotary frame rotary axis direction.

There are also a kind of modes: the CT rotation ring stand is rotated along rotary frame rotary shaft oneself.

The utility model is the CT in situ by being integrated on radiotherapy rotary frame, can directly carry out position to tumour ontology Verifying is set, realizes high-precision pendulum position.And the tumor image of spiral CT is clear, can be used for in-situ monitoring in treatment course The variation of tumour.It can also realize that original position does radiotherapy planning and when the variation of tumour is big, does radiotherapy planning again.This reality It is specifically designed with New X ray tube, so that the visual field along human body longitudinal direction is very wide, can turn around in rack and just cover most of swell Tumor and human organ.

Detailed description of the invention

Fig. 1 is that the present embodiment 1 faces the schematic diagram of the section structure.

Fig. 2 is 1 side elevational cross-section structural schematic diagram of the present embodiment.

Fig. 3 is that the present embodiment 2 faces the schematic diagram of the section structure.

Fig. 4 is 2 side elevational cross-section structural schematic diagram of the present embodiment.

Fig. 5 is that the present embodiment 3 faces the schematic diagram of the section structure.

Fig. 6 is 3 side elevational cross-section structural schematic diagram of the present embodiment.

Wherein: 1- rotary frame；2- radiotherapy head；3- outgoing treatment beam；4- isocenter point；5-X ray tube；6-X is penetrated Line；7-CT detector；8-CT detector collimator plate；9- human body；10- therapeutic bed；11- anode；12- cathode；13- electron beam； 14- electromagnetic control apparatus；15- coolant pipe；16- cooler；17-CT rotates ring stand.

Specific embodiment

Embodiment 1:

As shown in Figure 1, 2, the CT device in situ in a kind of radiotherapy, including rotary frame 1 and setting are in rotary frame Upper 1 radiotherapy head 2.CT device is additionally provided on rotary frame 1, CT device includes X-ray tube 5 and CT detector 7；CT detector 7 be 16 to 320 row's detectors, is provided with CT detector collimator plate 8.X-ray tube 5 and CT detector 7 are separately positioned on The opposite two sides of rotary frame 1, the X-ray 6 that 5 anode focus of X-ray tube issues are received by CT detector 7.The X-ray of CT device 6 isocenter point 4 is overlapped with the isocenter point 4 that radiotherapy head 2 is emitted treatment beam 3.Utilize the rotation of rotary frame 1, so that it may To realize the in-situ scanning of CT.

If rotary frame 1 turns around around therapeutic bed 10 or half-turn, so that it may reconstruct 16 using the CT detector of 16 rows The CT image of row.However, this image only has 16 rows so in the visual field width longitudinal along human body 9 of radiation focus point position Width, about 0.8-1.2cm.This does not show most of big tumours enough.If CT detector 7 is increased to 256 to 320 rows, The fladellum of wide-angle is formed, the visual field width longitudinal along human body 9 in 4 position of isocenter point in this way can be extended to more than 16cm.It can reconstruct along the longitudinal CT image for being greater than 16cm of human body 9, most of big tumours and organ can be covered.But It is that the CT detector that 256 rows or more arrange is very expensive.

Embodiment 2:

As shown in Figure 3,4, the CT device in situ in a kind of radiotherapy improved on that basis of example 1, including rotation Rack 1 and the radiotherapy head 2 being arranged on rotary frame 1.CT device is additionally provided on rotary frame 1, CT device includes X-ray tube 5 and CT detector 7；X-ray tube 5 and CT detector 7 are separately positioned on the opposite two sides of rotary frame 1.CT detector 7 is 16 rows Detector is provided with CT detector collimator plate 8.Isocenter point 4 and radiotherapy head 2 outgoing of the X-ray 6 of CT device are treated The isocenter point 4 of beam 3 is overlapped.X-ray tube 5 includes cathode 12, anode 11；Anode 11 is strip along 9 longitudinal direction of human body Shape, arc or polygon；Electromagnetic control apparatus 14 is provided between cathode 12 and anode 11, the electronics for emitting cathode 12 Beam 13 quickly focuses on the different location of anode 11 by electromagnetic field control.

Its principle is exactly that the focus-exposure on each anode can cover 16 row CT detectors 7, that is, 0.8-1.2cm Visual field width.With the focus on 5 anode 11 of X-ray tube move longitudinally to along human body 9 it is next on the position of anode 11, newly Exposure again can cover human body 9 another 0.8-1.2cm visual field width.By this method, 20 or more positions Can extended field of view width to 16cm, most of tumours and organ can be covered.The movement of focus on anode 11 be by What electromagnetic control apparatus 14 controlled, it can accomplish that very fast reciprocating is mobile, that is, the winged coke being commonly called as in CT equipment.In this way, During rotary frame 1 rotates at a slow speed, focus fast reciprocating is mobile, forms the multifocal exposure in different regulation of longitudinal angle Light is realized and expands visual field width.To realize that rotary frame 1 turns around or half-turn around therapeutic bed 10, so that it may reconstruct along people Body 9 has longitudinally increased the CT image of visual field width.Anode 11 and 5 shell of X-ray tube are connected to together, thus can be direct From the back side of anode 11 by coolant pipe 15 be passed directly into out of cooler 16 cooling liquid enter anode 11 and quickly it is cold But anode 11.Multiple intermittent exposure facilitates the heat dissipation of anode 11 on some focal position.

Embodiment 3:

As shown in Figure 5,6, the CT device in situ in another form of radiotherapy, including rotary frame 1, setting are revolving 1 radiotherapy head 2 and CT device on favourable turn frame.CT device is arranged on the CT rotation ring stand 17 of 1 center axis rotation of rotary frame； CT detector 7 is that 16-320 arranges detector, is provided with CT detector collimator plate 8.The equal centers of the X-ray 6 of CT device Point 4 is overlapped with the isocenter point 4 that radiotherapy head 2 is emitted treatment beam 3.CT device includes X-ray tube 5 and CT detector 7；X is penetrated Spool 5 and CT detector 7 are separately positioned on the opposite two sides of CT rotation ring stand 17.CT rotates ring stand 17 and revolves along rotary frame 1 Shaft oneself rotary motion.The quick rotation of ring stand 17, CT rotation are rotated with CT by CT detector 7 and corresponding X-ray tube 5 17 rotary shaft 100 of change frame forms the scanning of CT by isocenter point 4.Reconstruct the image of CT.

Basic principles, main features, and advantages of the present invention has been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model Protection scope defined by appended claims and its equivalent.

Claims (10)

1. the CT device in situ in a kind of radiotherapy, including rotary frame and the radiotherapy head being arranged on the rotary frame, It is characterized by: being additionally provided with CT device or CT device setting on the rotary frame around the rotary frame center On the CT rotation ring stand of axis rotation；The CT device includes X-ray tube and CT detector；The X-ray tube and CT detector point Opposite two sides are not set；The treatment beam that the isocenter point of the X-ray of the CT device and the radiotherapy head are emitted Isocenter point is overlapped.

2. the CT device in situ in radiotherapy as described in claim 1, it is characterised in that: the CT detector physical width Greater than 10cm.

3. the CT device in situ in radiotherapy as claimed in claim 2, it is characterised in that: the CT detector arrives for 16 320 row's detectors.

4. the CT device in situ in radiotherapy as described in any one of claims 1-3, it is characterised in that: the X-ray tube Including cathode, anode；The anode is strip, arc or polygon along human body longitudinal direction；Between the cathode and anode It is provided with electromagnetic control apparatus, for the electron beam of the emission of cathode quickly to be focused on anode not by electromagnetic field control Same position.

5. the CT device in situ in radiotherapy as claimed in claim 4, it is characterised in that: the anode and X-ray tube Together, the anode is directly cooling by liquid or liquid metal for cage connection.

6. the CT device in situ in radiotherapy as described in any one of claims 1-3, it is characterised in that: the CT device CT detector is moved back and forth along human body longitudinal direction.

7. the CT device in situ in radiotherapy as described in any one of claims 1-3, it is characterised in that: the CT device X-ray tube is moved back and forth along human body longitudinal direction.

8. the CT device in situ in radiotherapy as described in any one of claims 1-3, it is characterised in that: the rotary frame Center has the therapeutic bed moved along human body longitudinal direction.

9. the CT device in situ in radiotherapy as described in any one of claims 1-3, it is characterised in that: the CT rotating ring Frame is moved back and forth along rotary frame rotary axis direction.

10. the CT device in situ in radiotherapy as described in any one of claims 1-3, it is characterised in that: the CT rotation Ring stand is rotated along rotary frame rotary shaft oneself.