CN102441238A - Radiotherapy device, radiation device and collimation device - Google Patents

Abstract

A radiotherapy device, a radiation device and a collimation device, wherein the collimation device comprises: the device comprises an axial hollow collimating body, a radiation source and a control unit, wherein the axial hollow collimating body is provided with at least one group of collimating holes, the central line of each group of collimating holes focuses on a common focus, and the distribution rule of each group of collimating holes is matched with that of the radiation source; a switch body rotatably disposed in the axial hollow collimating body for allowing or blocking the radiation to pass through the collimating aperture. The invention can improve the control precision of the collimating device and reduce the axial size of the collimating device, thereby reducing the weight of the collimating device, saving materials and being simple to process and manufacture; the switch body allows or blocks the radioactive rays to pass through the collimation hole by simultaneously rotating the collimation body and the switch body, so that the speed of the radiotherapy device for converting from a treatment state to a non-treatment state is increased.

Description

Radiotherapy unit, radiation appliance and collimator apparatus

Technical field

The present invention relates to a kind of armarium that is used for disease treatments such as tumor, relate in particular to a kind of radiotherapy unit, radiation appliance and collimator apparatus.

Background technology

Radiotherapy is a kind of method of utilizing α, β, gamma-rays and all kinds of x roentgenotherapia machine of lonizing radiation such as radiosiotope generation or the diseases such as treatment malignant tumor such as x ray, electronics line, proton beam and other particle beam that accelerator produces.

Prior art has the multiple equipment that utilizes diseases such as radiation cure tumor; For example application number is the Chinese patent disclosed " a kind of medical radiation therapy apparatus structure " of " 200620337766.3 "; Application number is the Chinese patent of " 200510032933.2 " disclosed " a kind of radiotherapy unit ", and the patent No. is the collimator apparatus of the disclosed a kind of corrected X beam of the United States Patent (USP) of " US4993189 ".Wherein, application number comprising for disclosed " a kind of radiotherapy unit " in the Chinese patent of " 200510032933.2 ": rotating stand, be fixed on the revolution support ring at rotating stand two ends, the rotary ring, the therapeutic bed that passes rotary ring central authorities that are rotatably assorted with revolution support ring axial location, be fixed on radiation appliance between the rotary ring, be fixed on the driving device, engine control system and the detection feedback system that drive the radiation appliance rotation between the rotary ring and with the balanced body of radiation appliance counterweight, through rotary ring.Wherein, The source body is set in the radiation appliance; Be provided with dismountable source casket that is loaded with radioactive source in the body of source, and with source casket and source body space matched cylindrical collimation body, cylindrical collimation body is provided with three and arranges the radiation paths that straight line vertically distributes; First row penetrates the collimator that two groups of different apertures are installed respectively in the passage spaced reciprocally with the 3rd discharging, and second discharging is penetrated the interior group screen of installing of passage and blocked; Wherein among first embodiment; The two ends of cylindrical collimation body connect sinistral coiling drive mechanism and dextrad screw-drive mechanism respectively, drive sinistral coiling drive mechanism or dextrad screw-drive mechanism through driving device and cylindrical collimation body is moved vertically and rotate around central axis; Among second embodiment, an end of cylindrical collimation body connects screw-drive mechanism, and the other end connects the circular motion drive mechanism, drives screw-drive mechanism and circular motion drive mechanism through driving device.The radiotherapy unit of this prior art moves cylindrical collimation body vertically and rotates around central axis, reaches the collimator that switches the different apertures on the cylindrical collimation body, penetrates the ray of different beam diameters, and the focus of different area is carried out radiotherapy; And also be the lonizing radiation that make shield plug shielding radioactive source through rotational circle cylindricality collimation body, make radiotherapy unit be in non-therapeutic state.

Yet; In the radiotherapy unit of this prior art,, and worm drive are arranged at axial direction because driving device not only drives cylindrical collimation body around the central axis circular motion; The motor control complexity and the difficulty that certainly will make driving device aim at stretched increase, thereby reduce control accuracy; In addition, because the axial screw motion makes the axial dimension increase of radiotherapy unit, the collimator apparatus material cost is increased, it is big that weight becomes, and processing and manufacturing be trouble more; On the other hand, during to the conversion of non-therapeutic state,, needing shield ray as soon as possible in order to reduce unnecessary radiation by therapeutic state, thus its conversion speed The faster the better, and the shielding conversion speed is slower in the prior art.

Summary of the invention

The technical problem that the present invention solves provides a kind of radiotherapy unit, can improve radiotherapy unit the motor control precision, reduce its axial dimension, reduce its collimation body weight, make processing and make simple; And raising converts the speed of non-therapeutic state into from therapeutic state.

For addressing the above problem; The present invention provides a kind of collimator apparatus; Be used for the lonizing radiation that radioactive source sends are collimated, comprise: the collimation body of axial hollow, said axial hollow collimation body has at least one group of collimating aperture; The centrage of each group collimating aperture focuses on a public focus, and the regularity of distribution of the regularity of distribution of every group of collimating aperture and said radioactive source is complementary;

The rotatable switch body of being located in the said axial hollow collimation body is used for allowing or stopping that said lonizing radiation pass said collimating aperture.

Optional; Have at least one group of switch hole on the said switch body; The centrage of each group switch hole focuses on said public focus; And the regularity of distribution of said every group of switch hole and the regularity of distribution of said collimating aperture are complementary, and on time, said lonizing radiation pass said collimating aperture at said collimating aperture and said switch hole.

Optional, the collimation body of said axial hollow is cylinder or positive multi-faceted column.

Optional, said switch body is cylinder or positive multi-faceted column.

Optional, said switch body is a plate body.

Optional, said each group collimating aperture comprises at least one row's collimating aperture, every row's collimating aperture comprises a plurality of collimating apertures.

Optional, said each group switch hole comprises at least one row switch hole, every row switch hole comprises a plurality of switch holes or a strip hole.

The present invention also provides a kind of radiation appliance that is used for radiotherapy unit, comprises radioactive stand, is located at the radioactive source in the radioactive stand, and collimator apparatus, said collimator apparatus are above-described collimator apparatus.

The present invention also provides a kind of radiotherapy unit, comprising:

Radioactive stand;

Be located at the radioactive source in the said radioactive stand;

Collimator apparatus, this collimator apparatus are above-described collimator apparatus;

The collimator apparatus support is used to support said collimator apparatus;

First driving device is connected with the collimation body of said axial hollow, and the collimation body that is used to make said axial hollow is around its central axis rotation;

Second driving device is connected with said switch body, is used to make the central axis rotation of said switch body around said collimation body.

Optional, also comprise: frame, the shell that is connected with said frame;

Said casing cover is located at said radioactive stand, and is connected with it, and said casing cover is located on the said collimation body.

Compared with prior art, the present invention has the following advantages:

The present invention not along axial the moving of collimator apparatus, reduces the control complexity and the difficulty of driving device collimation device because collimator apparatus has only around the rotatablely moving of axis direction; Can improve the control accuracy of driving device collimation device like this; And, can reduce the axial dimension of collimator apparatus, thereby can reduce collimator apparatus weight owing to there is not axially-movable; Save material, and process and make simple;

Can be through rotating collimation body and switch body simultaneously, switch body is allowed or stop that said lonizing radiation pass said collimating aperture, improve radiotherapy unit and convert the speed of non-therapeutic state into from therapeutic state, reduce lonizing radiation to the human body unnecessary damages.

Description of drawings

Fig. 1 is the schematic cross-section of the radiotherapy unit of the present invention's one preferred embodiment;

Fig. 2 is the axonometric chart of the collimator apparatus of the present invention's one preferred embodiment;

Fig. 3 is the projection of collimator apparatus on Y plane radially of the present invention's one preferred embodiment;

Fig. 4 is the schematic cross-section of collimator apparatus on axial directions X of the present invention's one preferred embodiment;

Fig. 5 is the perspective view that the collimator apparatus of the present invention's one preferred embodiment is in therapeutic state;

Fig. 6 is the projection of collimator apparatus on the sagittal plane of another preferred embodiment of the present invention.

The specific embodiment

Collimator apparatus in the specific embodiment of the present invention, the radiation appliance that is used for radiotherapy unit and radiotherapy unit; Collimator apparatus comprises the collimation body and the switch body of axial hollow; Switch body is rotatable to provide in the collimation body of axial hollow; Switch body is rotatable to be located in the collimation body of axial hollow; Utilize driving device to drive the collimation body respectively and switch body is independently rotated, can realize that switch body allows or stop that said lonizing radiation pass said collimating aperture, make radiotherapy unit apace between therapeutic state and non-therapeutic state through rotation collimation body or switch body; Conversion improves radiotherapy unit and converts the speed of non-therapeutic state into from therapeutic state, reduces the injury of lonizing radiation to human body; And, because collimator apparatus has only around the rotatablely moving of axis direction, not along axial the moving of collimator apparatus; The control difficulty of driving device collimation device is reduced, can improve the control accuracy of driving device collimation device like this, and owing to there is not axially-movable; Can reduce the axial dimension of collimator apparatus; Thereby can reduce collimator apparatus weight, save material, and process and make simple.

In order to make those skilled in the art can better understand essence of the present invention, elaborate below in conjunction with collimator apparatus, radiotherapy unit and the radiation appliance of accompanying drawing to the specific embodiment of the invention.

Fig. 1 is the cross-sectional view of the radiotherapy unit of the specific embodiment of the invention.With reference to figure 1, the radiotherapy unit of the specific embodiment of the invention comprises: the device (not shown) that carries human body;Radioactive stand 10; Be located at theradioactive source 20 in the said radioactive stand, saidradioactive stand 10 has the effect of the lonizing radiation of shieldingradioactive source 20 radiation;Collimator apparatus 30 is used for the lonizing radiation that said radioactive source sends are collimated, and said collimation comprises thecollimation body 31 and rotatable the providing in theswitch body 32 of said axialhollow collimation body 31 of axial hollow; Collimator apparatus support 40 is used to support saidcollimator apparatus 30, and this collimator apparatus support is a general knowledge known in this field, does not do at this and gives unnecessary details; The first driving device (not shown) is connected with thecollimation body 31 of said axial hollow, and thecollimation body 31 that is used to drive said axial hollow is around its central axis rotation, and this first driving device is a general knowledge known in this field, for example can be a motor; The second driving device (not shown) is connected with saidswitch body 32, is used to drive the central axis rotation of saidswitch body 32 around saidcollimation body 31, and this second driving device is a general knowledge known in this field, for example can be a motor.

In conjunction with reference to figure 2, Fig. 3 and Fig. 4; Thiscollimator apparatus 30 comprises: thecollimation body 31 of axial hollow; Wherein, Said axialhollow collimation body 31 has at least one group of collimatingaperture 33, and the centrage of each group collimating aperture focuses on a public focus O, and the regularity of distribution of the regularity of distribution of every group of collimatingaperture 33 and saidradioactive source 20 is complementary; Therotatable switch body 32 that provides in saidhollow collimation body 31 is used for allowing or stopping that said lonizingradiation 21 pass said collimatingaperture 33.

In the preferred embodiment of the present invention shown in the diagram, saidcollimation body 31 has three groups of collimatingapertures 33, is respectively first group of collimating aperture 331; Second group of collimating aperture 332 and the 3rd group of collimating aperture 333; Each group collimating aperture comprises at least one row's collimating aperture, and every row's collimating aperture comprises a plurality of collimating apertures, in this preferred embodiment of the present invention;Radioactive source 20 is two rows, and row's number of each group collimating aperture also is two rows accordingly; Varying in size of the aperture of first group of collimating aperture 331, second group of collimating aperture 332 and the 3rd group of collimating aperture 333; To the focuses of different sizes, the lonizing radiation that can make the radioactive source radiation throughrotation collimation body 31 are through irradiated lesion behind the collimating aperture collimation in corresponding aperture; In specific embodiment of the present invention;Collimating aperture 33 is three groups, and the group number of collimating aperture can be provided with the group number of collimating aperture according to the size of required collimator aperture in other embodiments; In specific embodiment; The group number of collimating aperture is generally 1～12 group, that is to say, collimator apparatus has the collimating aperture in 12 groups of different apertures; In addition, the number of the collimating aperture of each group also can be provided with according to actual needs, does not do qualification at this, and its scope can be 1～24.In specific embodiment, the pore size scope of collimating aperture can be provided with the aperture of every group of collimating aperture according to the needs of practical application between 1mm～50mm.In specific embodiment of the present invention,collimation body 31 is cylindrical, yet that the shape of thiscollimation body 31 is not limited to is cylindrical, also can be positive multi-faceted column, and other shapes.With reference to figure 6; Be the projection of collimator apparatus on the sagittal plane of another preferred embodiment of the present invention, in this specific embodiment, collimation body 31 ' be regular hexahedron; Collimating aperture 33 ' the regularity of distribution and the regularity of distribution of radioactive source be complementary, do not do detailed description at this.

With reference to figure 2, Fig. 3 and Fig. 4, in preferred embodiment of the present invention, has one group ofswitch hole 34 on the saidswitch body 32; Said each group switch hole comprises at least one row switch hole; Every row switch hole comprises a plurality of switch holes, and in this specific embodiment,radioactive source 20 is two rows; Each group collimating aperture is two rows, and row's number of each group switch hole also is two rows; The centrage of eachgroup switch hole 34 focuses on said public focus O; And the regularity of distribution of the regularity of distribution of said every group of switch hole and said collimatingaperture 33 is complementary; Punctual 34 pairs of saidcollimating aperture 33 and said switch holes; That is to say that with wherein 33 pairs of one group of collimating apertures are punctual, thelonizing radiation 21 ofradioactive source 20 radiation can shine the focus that is positioned at public focus O through collimatingaperture 33 and switchhole 34 at this group switch hole 34.In specific embodiment of the present invention, saidswitch body 32 is a cylinder, and in other embodiments of the invention, saidswitch body 32 also can be positive multi-faceted column.Need to prove that in this preferred embodiment, switch hole is one group, in other embodiment, switch hole also can be for more than one group, as long as satisfy the on-off action that switch body can play the lonizing radiation of radioactive source radiation.In addition, the number of the switch hole on the switch body is not done qualification yet, can be provided with according to actual needs.In order to make radiotherapy unit be in therapeutic state;Drive collimation body 31 andswitch body 32 respectively by first driving device and second driving device; Theswitch hole 34 ofswitch body 32 is aimed at thecollimating aperture 33 on thecollimation body 31, and radiotherapy unit is in therapeutic state, with reference to figure 4 and Fig. 5 (for the alignment of clearer demonstration collimating aperture and switch hole; Only show and the aligned one group of collimating aperture of switch hole among the figure; Other collimating apertures are not shown in the figures), thelonizing radiation 21 ofradioactive source 20 radiation focus on public focus O after through collimator in one group of collimatingaperture 33 andswitch hole 34, when patient is carried out radiotherapy; Focus promptly is positioned at this public focus O, thereby can reach the purpose of killing harmful cell.After treatment is accomplished, drivecollimation body 31 andswitch body 32 respectively by first driving device and second driving device again, collimatingaperture 33 non-alignings the on theswitch hole 34 that makesswitch body 32 and thecollimation body 31, radiotherapy unit is in non-therapeutic state.Owing to utilize the rotation respectively of collimation body and switch body, can apace radiotherapy unit be switched between therapeutic state and non-therapeutic state, to reach the purpose of minimizing to Normocellular irradiation.Above-described every row switch hole also can use a strip hole to replace; Extend along the switch body axial direction in this strip hole; When the strip switch hole on the switch body and the collimating aperture on the collimation body on time; Radiotherapy unit is in therapeutic state, when the strip switch hole on the switch body and the collimating aperture on the collimation body to non-punctual, radiotherapy unit is in non-therapeutic state.

With reference to figure 1, radiotherapy unit of the present invention also comprisesframe 50, theshell 60 that is connected with saidframe 50; Saidshell 60 is covered on saidradioactive stand 10, and is connected with it, and saidshell 60 is covered on the said collimation body 31.The concrete structure of the collimator apparatus of collimator apparatus of the present invention and the above radiotherapy unit is identical; Do not do at this and to give unnecessary details, those skilled in the art can be known the specific embodiment that is used for the collimator apparatus of radiotherapy unit of the present invention according to essence of the present invention.

Radiation appliance of the present invention comprises radioactive stand; Be located at the radioactive source in the radioactive stand; Collimator apparatus; Be used for the lonizing radiation that said radioactive source sends are collimated, wherein, said radioactive stand, radioactive source, the collimator apparatus be located in the radioactive stand specifically are described in the specific descriptions of the above radiotherapy unit; Do not do at this and to give unnecessary details, those skilled in the art can be known the specific embodiment that is used for the collimator apparatus of radiotherapy unit of the present invention according to essence of the present invention.

The present invention can drive collimation body and switch body rotation respectively through driving device; Collimating aperture and switch hole are aimed at; And the collimator in different apertures can be set on the same group the collimating aperture, can treat respectively to the focuses of different sizes like this, owing to realize the selection of the collimator in different apertures through the rotation of collimation body and switch body; Therefore with respect to prior art; This collimator apparatus does not have the motion of axial direction, and the control difficulty of driving device collimation device is reduced, and can improve the motor control precision of driving device collimation device like this; And reduce the axial dimension of collimator apparatus, thereby can save material, weight reduction, make processing and make simple.In addition; Owing to can realize collimating aperture and the non-aligning of switch hole through collimation body and switch body are rotated simultaneously; Promptly realize switching to non-therapeutic state from therapeutic state; Therefore with respect to prior art only realize switching from therapeutic state to non-therapeutic state through rotation collimation body, switch speed is fast, can reduce the injury of lonizing radiation to human body.

In other embodiments of the invention; Said switch body also can be plate body; Drive the plate body rotation through second driving device, can make the plate body permission or stop that lonizing radiation pass the focus that the collimating aperture irradiation is positioned at public focus O, can reach above-described the object of the invention equally.

The above is merely specific embodiment of the present invention; In order to make those skilled in the art better understand spirit of the present invention; Yet protection scope of the present invention is not a limited range with the specific descriptions of this specific embodiment; Any those skilled in the art can make an amendment specific embodiment of the present invention, and not break away from protection scope of the present invention in the scope that does not break away from spirit of the present invention.

Claims (10)

1. collimator apparatus; Be used for the lonizing radiation that radioactive source sends are collimated; It is characterized in that, comprising: the collimation body of axial hollow, said axial hollow collimation body has at least one group of collimating aperture; The centrage of each group collimating aperture focuses on a public focus, and the regularity of distribution of the regularity of distribution of every group of collimating aperture and said radioactive source is complementary;

The rotatable switch body that is arranged in the said axial hollow collimation body is used for allowing or stopping that said lonizing radiation pass said collimating aperture.

2. collimator apparatus as claimed in claim 1; It is characterized in that; Have at least one group of switch hole on the said switch body, the centrage of each group switch hole focuses on said public focus, and the regularity of distribution of the regularity of distribution of said every group of switch hole and said collimating aperture is complementary; To on time, said lonizing radiation pass said collimating aperture at said collimating aperture and said switch hole.

3. collimator apparatus as claimed in claim 1 is characterized in that, the collimation body of said axial hollow is cylinder or positive multi-faceted column.

4. collimator apparatus as claimed in claim 2 is characterized in that, said switch body is cylinder or positive multi-faceted column.

5. collimator apparatus as claimed in claim 1 is characterized in that, said switch body is a plate body.

6. collimator apparatus as claimed in claim 2 is characterized in that, said each group collimating aperture comprises at least one row's collimating aperture, and every row's collimating aperture comprises a plurality of collimating apertures.

7. collimator apparatus as claimed in claim 6 is characterized in that, said each group switch hole comprises at least one row switch hole, and every row switch hole comprises a plurality of switch holes or a strip hole.

8. a radiation appliance that is used for radiotherapy unit comprises radioactive stand, is located at the radioactive source in the radioactive stand, and collimator apparatus is characterized in that: said collimator apparatus is each described collimator apparatus of claim 1～7.

9. radiotherapy unit is characterized in that comprising:

Radioactive stand;

Be located at the radioactive source in the said radioactive stand;

Each described collimator apparatus of claim 1～7;

The collimator apparatus support is used to support said collimator apparatus;

First driving device is connected with the collimation body of said axial hollow, and the collimation body that is used to make said axial hollow is around its central axis rotation;

Second driving device is connected with said switch body, is used to make the central axis rotation of said switch body around said collimation body.

10. radiotherapy unit as claimed in claim 9 is characterized in that, also comprises: frame, the shell that is connected with said frame;

Said casing cover is located at said radioactive stand, and is connected with it, and said casing cover is located on the said collimation body.

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