CN109771846B - Radiotherapy equipment alignment method based on acousto-optic monitoring - Google Patents
Radiotherapy equipment alignment method based on acousto-optic monitoring Download PDFInfo
- Publication number
- CN109771846B CN109771846B CN201910047148.3A CN201910047148A CN109771846B CN 109771846 B CN109771846 B CN 109771846B CN 201910047148 A CN201910047148 A CN 201910047148A CN 109771846 B CN109771846 B CN 109771846B
- Authority
- CN
- China
- Prior art keywords
- semi
- acousto
- sound
- acoustic absorption
- image sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1001—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy
- A61N5/1028—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy using radiation sources introduced into or applied onto the body; brachytherapy using radiation sources applied onto the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
The invention relates to a radiotherapy equipment alignment method based on acousto-optic monitoring, belonging to the technical field of medical instruments and precision instruments; the method comprises the steps that when an acoustic absorption reflecting surface is not arranged, an image sensor obtains an interference pattern as a reference, and alignment is realized by judging the change rule of the interference pattern after the acoustic absorption reflecting surface is arranged and a sound source is turned on until the extreme value reflecting the change rule of the interference pattern does not exceed a threshold value; the method has simple steps, but can complete six-degree-of-freedom alignment through one index, and has high alignment precision.
Description
The application is a divisional application of the invention patent application of an alignment device and an alignment method of radiotherapy equipment based on acousto-optic monitoring.
Application date of the original case: 2017-01-11.
Original application No.: 2017100199292.
the name of the original invention is: radiotherapy equipment aligning device and method based on acousto-optic monitoring.
Technical Field
The invention discloses a radiotherapy equipment alignment method based on acousto-optic monitoring, and belongs to the technical field of medical instruments and precision instruments.
Background
Radiotherapy is one of three treatment methods, namely radiotherapy and cancer, and a treatment method for inhibiting and killing cancer cells by irradiating tumors with rays with different energies. In the course of radiotherapy, if the radiation irradiates the normal tissue, it will destroy the normal tissue, and will produce adverse effect to human body, if the focus irradiation is incomplete, the effect of radiotherapy is hard to be guaranteed, therefore, it is the key technical link that must be guaranteed in the course of radiotherapy to aim at the focus.
Disclosure of Invention
In order to realize the technical aim of aligning the focus, the invention provides a radiotherapy equipment aligning method based on acousto-optic monitoring, which has simple steps, can complete six-degree-of-freedom alignment through one index and has high alignment precision.
The purpose of the invention is realized as follows:
the radiotherapy equipment aligning device based on acousto-optic monitoring comprises an acousto-optic generation monitoring cavity and an acoustic absorption reflecting surface;
the photoacoustic generation monitoring cavity comprises a cavity, an optical fiber with a 45-degree semi-reflecting and semi-transmitting end face inserted from the middle of the cavity, a plane reflector arranged at the front end of the optical fiber, image sensors arranged on the side face of the optical fiber and at the bottom of the cavity, a vibrating membrane arranged on the side face of the optical fiber and at the top of the cavity, and a sound source arranged beside the vibrating membrane;
one path of light beam emitted by the optical fiber penetrates through the semi-reflective and semi-transparent end face and is emitted to the plane reflector, and the light beam reflected by the plane reflector is reflected by the semi-reflective and semi-transparent end face and is incident to the surface of the image sensor; the other path of light is directly reflected by the semi-reflecting and semi-transmitting end face and is incident to the surface of the vibrating membrane, and the light beam reflected from the vibrating membrane is transmitted from the semi-reflecting and semi-transmitting end face and is incident to the surface of the image sensor; the two paths of light beams form interference fringes on the surface of the image sensor;
the acoustic absorption reflecting surface comprises a sound absorption layer and a sound reflecting layer distributed on the inner surface of the sound absorption layer, and the sound reflecting layer is tangent to the same ellipsoid; the acoustic absorption reflecting surface can be adjusted in six degrees of freedom.
The radiotherapy equipment alignment method based on acousto-optic monitoring, which is realized on the radiotherapy equipment alignment device based on acousto-optic monitoring, comprises the following steps:
step a, when an acoustic absorption reflecting surface is not arranged, an image sensor obtains an interference pattern;
b, setting an acoustic absorption reflecting surface, turning on a sound source, and obtaining a group of interference patterns by an image sensor;
c, evaluating consistency by using one interference pattern obtained in the step a and each interference image in the group of interference patterns obtained in the step b;
d, finding an extreme value of the consistency evaluation result obtained in the step c;
step e, judging the extreme value, if:
c, adjusting the position of the acoustic absorption reflecting surface when the extreme value of the consistency evaluation result exceeds a threshold value, and repeating the step b;
and ending the consistency evaluation result when the extreme value does not exceed the threshold value.
In the radiotherapy equipment alignment method based on acousto-optic monitoring, in the step c, a two-dimensional correlation coefficient is used for evaluation;
in the radiotherapy equipment alignment method based on acousto-optic monitoring, in the step e, the position of the acoustic absorption reflecting surface is adjusted to the following direction: the far focus of the ellipsoid tangent to the sound reflecting layer is adjusted to the sound source position.
Has the advantages that:
firstly, under the structure of the invention, under the condition of non-alignment, sound waves emitted by a sound source can form vibration on the vibration film after being reflected by the sound reflection layer, the interference pattern on the image sensor can be changed by the vibration of the vibration film, and whether the alignment is carried out or not can be judged by adjusting the acoustic absorption reflection surface and judging the change rule of the interference pattern under the action of sound;
secondly, in the invention, the sound reflection layer is tangent to the same ellipsoid, and the structural design can fully utilize the asymmetry of the ellipsoid, so that the sound can not be reflected to the vibrating membrane only under the alignment condition, and the sound can be reflected to the vibrating membrane under the non-alignment condition, thereby realizing the six-degree-of-freedom adjustment;
thirdly, the sound reflecting layer is tangent to the same ellipsoid, and the ellipsoid can receive sound waves in a large angle range, so that the high-precision positioning function is realized;
fourthly, the interference pattern is adopted for judgment, and the interference pattern has the function of an optical lever, so that the tiny displacement of the vibration film can be converted into the interference pattern change with larger change, and high-precision positioning can be realized;
drawings
Fig. 1 is a schematic structural diagram of a radiotherapy equipment alignment device based on acousto-optic monitoring.
In the figure: the photoacoustic imaging device comprises a photoacoustic generation monitoring cavity 1, a cavity 11, an optical fiber 12, a plane reflector 13, an image sensor 14, a vibrating membrane 15, a sound source 16, an acoustic absorption reflecting surface 2, a sound absorption layer 21 and a sound reflecting layer 22.
Detailed Description
Detailed description of the preferred embodiment
The embodiment is an embodiment of a radiotherapy equipment alignment device based on acousto-optic monitoring.
The radiotherapy equipment alignment device based on acousto-optic monitoring in the embodiment has the structural schematic diagram as shown in fig. 1; the radiotherapy equipment aligning device based on acousto-optic monitoring is composed of an acousto-optic generation monitoring cavity 1 and an acoustic absorption reflecting surface 2;
the photoacoustic generation monitoring cavity 1 comprises a cavity 11, an optical fiber 12 with a 45-degree semi-reflecting and semi-transmitting end face inserted from the middle of the cavity, a plane reflector 13 arranged at the front end of the optical fiber 12, an image sensor 14 arranged on the side face of the optical fiber 12 and at the bottom of the cavity 11, a vibrating membrane 15 arranged on the side face of the optical fiber 12 and at the top of the cavity 11, and a sound source 16 arranged beside the vibrating membrane 15;
one path of light beams emitted by the optical fiber 12 penetrates through the semi-reflective and semi-transparent end face and is emitted to the plane reflector 13, and the light beams reflected by the plane reflector 13 are reflected by the semi-reflective and semi-transparent end face and are emitted to the surface of the image sensor 14; the other path of light is directly reflected by the semi-reflecting and semi-transmitting end face and is incident to the surface of the vibration film 15, and the light beam reflected from the vibration film 15 is transmitted from the semi-reflecting and semi-transmitting end face and is incident to the surface of the image sensor 14; the two light beams form interference fringes on the surface of the image sensor 14;
the acoustic absorption reflecting surface 2 comprises a sound absorption layer 21 and a sound reflection layer 22 distributed on the inner surface of the sound absorption layer, and the sound reflection layer 22 is tangent to the same ellipsoid; the acoustic absorption reflecting surface 2 can be adjusted with six degrees of freedom.
Detailed description of the invention
The embodiment is an embodiment of a radiotherapy equipment alignment method based on acousto-optic monitoring.
The radiotherapy equipment alignment method based on acousto-optic monitoring in this embodiment is implemented on the radiotherapy equipment alignment device based on acousto-optic monitoring in the first embodiment, and includes the following steps:
step a, when the acoustic absorption reflecting surface 2 is not arranged, the image sensor 14 obtains an interference pattern;
step b, setting the acoustic absorption reflecting surface 2, turning on the sound source 16, and obtaining a group of interference patterns by the image sensor 14;
c, evaluating consistency by using one interference pattern obtained in the step a and each interference image in the group of interference patterns obtained in the step b; the consistency evaluation is to calculate the two-dimensional correlation coefficient of the two images;
d, finding an extreme value of the consistency evaluation result obtained in the step c;
step e, judging the extreme value, if:
c, adjusting the position of the acoustic absorption reflecting surface 2 when the extreme value of the consistency evaluation result exceeds a threshold value, and repeating the step b; the direction of adjustment is: adjusting the far focus of the ellipsoid tangent to the sound reflective layer 22 to the sound source 16 position;
and ending the consistency evaluation result when the extreme value does not exceed the threshold value.
Claims (3)
1. The radiotherapy equipment alignment method based on acousto-optic monitoring is realized on a radiotherapy equipment alignment device based on acousto-optic monitoring, wherein the radiotherapy equipment alignment device based on acousto-optic monitoring is composed of an acousto-optic generation monitoring cavity (1) and an acoustic absorption reflecting surface (2);
the photoacoustic generation monitoring cavity (1) comprises a cavity (11), an optical fiber (12) with a 45-degree semi-reflecting and semi-transmitting end face inserted from the middle of the cavity (11), a plane reflector (13) arranged at the front end of the optical fiber (12), an image sensor (14) arranged on the side face of the optical fiber (12) and at the bottom of the cavity (11), a vibrating membrane (15) arranged on the side face of the optical fiber (12) and at the top of the cavity (11), and a sound source (16) arranged beside the vibrating membrane (15);
one path of light beam emitted by the optical fiber (12) penetrates through the semi-reflective and semi-transparent end face and is emitted to the plane reflector (13), and the light beam reflected by the plane reflector (13) is reflected by the semi-reflective and semi-transparent end face and is emitted to the surface of the image sensor (14); the other path of light is directly reflected by the semi-reflecting and semi-transmitting end surface and is incident to the surface of the vibration film (15), and the light beam reflected from the vibration film (15) is transmitted from the semi-reflecting and semi-transmitting end surface and is incident to the surface of the image sensor (14); the two light beams form interference fringes on the surface of the image sensor (14);
the acoustic absorption reflecting surface (2) comprises a sound absorption layer (21) and a sound reflecting layer (22) distributed on the inner surface of the sound absorption layer, and the sound reflecting layer (22) is tangent to the same ellipsoid; the acoustic absorption reflecting surface (2) can be adjusted in six degrees of freedom;
the method is characterized by comprising the following steps of:
step a, when the acoustic absorption reflecting surface (2) is not arranged, the image sensor (14) obtains an interference pattern;
b, setting an acoustic absorption reflecting surface (2), turning on a sound source (16), and obtaining a group of interference patterns by an image sensor (14);
c, evaluating consistency by using one interference pattern obtained in the step a and each interference image in the group of interference patterns obtained in the step b;
d, finding an extreme value of the consistency evaluation result obtained in the step c;
step e, judging the extreme value, if:
c, adjusting the position of the acoustic absorption reflecting surface (2) when the extreme value of the consistency evaluation result exceeds a threshold value, and repeating the steps b to e;
and ending the consistency evaluation result when the extreme value does not exceed the threshold value.
2. The method for aligning a radiotherapy apparatus based on acousto-optic monitoring as claimed in claim 1, wherein said step c, using two-dimensional correlation coefficient to evaluate.
3. The method for aligning a radiotherapy apparatus based on acousto-optic monitoring as claimed in claim 1, characterized in that, the position of the acoustic absorption reflecting surface (2) is adjusted in the following direction in step e: the far focus of an ellipsoid tangent to the sound reflecting layer (22) is adjusted to the sound source (16) position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047148.3A CN109771846B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy equipment alignment method based on acousto-optic monitoring |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910047148.3A CN109771846B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy equipment alignment method based on acousto-optic monitoring |
| CN201710019929.2A CN106581874B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy apparatus alignment device and alignment methods based on acousto-optic monitoring |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710019929.2A Division CN106581874B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy apparatus alignment device and alignment methods based on acousto-optic monitoring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109771846A CN109771846A (en) | 2019-05-21 |
| CN109771846B true CN109771846B (en) | 2020-08-18 |
Family
ID=58582724
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910047148.3A Expired - Fee Related CN109771846B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy equipment alignment method based on acousto-optic monitoring |
| CN201710019929.2A Expired - Fee Related CN106581874B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy apparatus alignment device and alignment methods based on acousto-optic monitoring |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710019929.2A Expired - Fee Related CN106581874B (en) | 2017-01-11 | 2017-01-11 | Radiotherapy apparatus alignment device and alignment methods based on acousto-optic monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN109771846B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002670A (en) * | 2006-01-20 | 2007-07-25 | 奥林巴斯医疗株式会社 | Method and apparatus for analyzing characteristic information of object,endoscope device |
| CN102455287A (en) * | 2010-10-29 | 2012-05-16 | 沈阳市政集团有限公司 | Gantry type engineering material quality detecting device |
| US8657175B2 (en) * | 2009-10-29 | 2014-02-25 | Medigus Ltd. | Medical device comprising alignment systems for bringing two portions into alignment |
| CN106597632A (en) * | 2017-01-11 | 2017-04-26 | 哈尔滨工业大学 | Ellipsoidal reflector perifocus high-precision positioning device and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2035924C1 (en) * | 1992-07-01 | 1995-05-27 | Александр Геннадьевич Громов | Device for radiation therapy |
| JP2004117317A (en) * | 2002-09-30 | 2004-04-15 | Osaka Gas Co Ltd | Measuring method for sonic wave originated from carbonaceous material |
| WO2010070737A1 (en) * | 2008-12-16 | 2010-06-24 | 株式会社島津製作所 | Particle beam treatment apparatus |
-
2017
- 2017-01-11 CN CN201910047148.3A patent/CN109771846B/en not_active Expired - Fee Related
- 2017-01-11 CN CN201710019929.2A patent/CN106581874B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002670A (en) * | 2006-01-20 | 2007-07-25 | 奥林巴斯医疗株式会社 | Method and apparatus for analyzing characteristic information of object,endoscope device |
| US8657175B2 (en) * | 2009-10-29 | 2014-02-25 | Medigus Ltd. | Medical device comprising alignment systems for bringing two portions into alignment |
| CN102455287A (en) * | 2010-10-29 | 2012-05-16 | 沈阳市政集团有限公司 | Gantry type engineering material quality detecting device |
| CN106597632A (en) * | 2017-01-11 | 2017-04-26 | 哈尔滨工业大学 | Ellipsoidal reflector perifocus high-precision positioning device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109771846A (en) | 2019-05-21 |
| CN106581874A (en) | 2017-04-26 |
| CN106581874B (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10130263B2 (en) | Photoacoustic measuring apparatus | |
| JP5495718B2 (en) | Subject information acquisition device | |
| JP5628038B2 (en) | Apparatus, system and method for the generation and integration of compact illumination schemes | |
| WO2013183302A1 (en) | Acoustooptic imaging device | |
| RU2440084C2 (en) | Method and apparatus for optical system localisation, and ophthalmological therapeutic apparatus | |
| US20200056986A1 (en) | Multifocal photoacoustic microscopy through an ergodic relay | |
| WO2009097323A3 (en) | Optical alignment system and alignment method for radiographic x-ray imaging | |
| WO2013061582A1 (en) | Photoacoustic imaging apparatus | |
| WO2004016161A1 (en) | Method and arrangement for performing measurements of the topography of a surface by means of a thermal emission from the surface | |
| US11986344B2 (en) | Portable probe for photoacoustic tomography and real-time photoacoustic tomography device | |
| CN207557633U (en) | Have the structured light projecting device and electronic equipment of encoded light | |
| US20210187330A1 (en) | Apparatus and method for ultrasound beam shaping | |
| WO2014045564A1 (en) | Object information acquiring apparatus and control method for the object information acquiring apparatus | |
| US20140126324A1 (en) | Acousto-optic image capture device | |
| KR20210087541A (en) | Device and method for optical measurement of the inner contour of a spectacle frame | |
| CN109771846B (en) | Radiotherapy equipment alignment method based on acousto-optic monitoring | |
| JP5815714B2 (en) | Test method for laser devices | |
| CN105686800B (en) | Subject information acquisition device and its control method | |
| JP2019523414A (en) | Full-field interference imaging system and method | |
| JP4025879B2 (en) | Displacement distribution measuring method and apparatus using digital holography | |
| CN107271403A (en) | A kind of optical thin film LIDT test devices and method of testing based on light scattering | |
| US10743772B2 (en) | Photoacoustic imaging apparatus | |
| US20220047168A1 (en) | Device for optoacoustic imaging and corresponding control method | |
| CN112630983A (en) | Laser system, laser-induced damage testing system and method | |
| CN104000623B (en) | A kind of axis oculi group sound velocity measuring method and device based on optoacoustic effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200818 Termination date: 20210111 |