CN114096889A - Radiation beam detection device - Google Patents
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- CN114096889A CN114096889A CN201980098371.9A CN201980098371A CN114096889A CN 114096889 A CN114096889 A CN 114096889A CN 201980098371 A CN201980098371 A CN 201980098371A CN 114096889 A CN114096889 A CN 114096889A
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- A—HUMAN NECESSITIES
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- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
- G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
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Abstract
A radiation beam detection apparatus (3,4,5) comprising: a scintillator (31,41,51), wherein a radiation beam (91) is incident at an angle to a front surface (311,411,511) of the scintillator (31,41,51) along a linear path (911); and a first light receiver (321,421,52) for acquiring a first optical signal in a first direction generated by the radiation beam (91) entering the scintillator (31,41,51) and converting the first optical signal into a first electrical signal, wherein the first light receiver (321,421,52) is disposed at a position not interfering with each other on an extension line (912) of a linear path (911) of the radiation beam (91).
Description
The present invention relates to a detector, and more particularly, to a radiation beam detector.
Radiation techniques have been widely used in modern medicine, such as radiotherapy, radiodiagnosis, nuclear medicine, and the like. The principle of radiotherapy is that high-energy radiation is used to interact with tumor cells, so that the tumor cells are dissociated or excited to generate toxic free radicals, which further cause the tumor cells to be damaged, or the radiation energy released by the dissociated radiation directly causes the DNA of cancer cells to be broken. The dose of radiation directly affects the degree of damage to tumor cells and normal tissues after the radiation enters the patient. Thus, the radiation parameters of the radiation therapy are coordinated with the periodic beam quality assurance to determine that the patient received a radiation dose that is within the clinically acceptable range of the prescribed dose. That is, the radiotherapy technique needs to be combined with careful quality assurance measures and dose verification to ensure the treatment effect of the patient.
Control of the radiation dose and beam parameters can be achieved by beam monitoring, and therefore detection means for monitoring the radiation beam are necessary for radiotherapy. Conventional radiation beam detection devices include gas-filled detectors, scintillation detectors, and semiconductor detectors. The gas-filled detector is equipped with a free chamber (ion chamber) which generates charges by the action of the radiation passing through the free chamber and the gas in the chamber, and the generated charges are captured by an external circuit to measure the radiation dose and beam parameters. The scintillation detector is configured with a scintillator (scintillator). Specifically, please refer to fig. 1, which shows a schematic diagram of a flicker detector 1 in the prior art. The scintillation detector 1 comprises a scintillator 11 and a receiver 12. After the radiation beam 13 is incident on the scintillator 11, the scintillator 11 generates light and collects a light signal generated by the scintillator 11 by the receiver 12 provided at the rear. However, the radiation beam 13 passes through the scintillator 11 to directly irradiate the receiver 12 behind the scintillator 11, so that the receiver 12 is easily broken by radiation damage. Furthermore, since the radiation beam 13 passing through the receiver 12 also deteriorates the detection quality of the radiation beam 13, the scintillation detector 1 can be used only for detecting low-energy X-rays, and is not suitable for detecting high-energy therapeutic radiation beams.
Therefore, another scintillation detector has been developed that moves the receiver to a position that is not in the path of the radiation beam. Referring to fig. 2, a schematic diagram of another flicker detector 2 of the prior art is shown. The scintillation detector 2 comprises a darkroom cavity 21, an acrylic prosthesis (PMMA phantom)22, a scintillator 23, a camera 24, and a mirror 25. The scintillation detector 2 irradiates the scintillator 23 with a radiation beam 26 through the acrylic prosthesis 22, so that the radiation beam 26 reacts with the scintillator substance to generate light, and the generated light signal is captured by the camera 24 to obtain the radiation dose.
However, in the conventional structure of the flicker detector 2 shown in fig. 2, a large space is required to mount the camera 24, so that the flicker detector 2 is bulky and inconvenient to install. Furthermore, since the camera 24 must be accurately erected out of the traveling path of the radiation beam 26 so as to prevent the camera 24 from being damaged by the radiation of the radiation beam 26, the angle and position of the camera 24 are difficult to correct. Moreover, the position of the camera 24 must be recalibrated after each movement of the flicker detector 2, which is time consuming and inconvenient to use.
In view of the above, there is a need for a radiation beam detecting apparatus, which can measure the radiation beam quickly, has a small size, is easy to install, and is not damaged by the radiation of the radiation beam.
In order to solve the above-mentioned problems of the prior art, it is an object of the present invention to provide a radiation beam detecting device, which uses an image sensor to replace a camera in a conventional scintillation detector, so as to effectively reduce the overall size of the radiation beam detecting device and avoid the problem of difficult camera calibration. Further, by disposing the image sensor so as not to be located on the traveling path of the radiation beam, it is possible to prevent the image sensor from being directly bombarded by the radiation beam to cause malfunction or damage.
To achieve the above object, the present application provides a radiation beam detecting apparatus, comprising: a scintillator comprising a front surface, a back surface opposite the front surface, and a first side surface adjacent the front surface and the back surface, wherein a radiation beam is angularly incident to the front surface of the scintillator along a linear path; and a first light receiver disposed on the first side surface of the scintillator along a first direction, for acquiring a first optical signal in the first direction generated by the radiation beam entering the scintillator, and converting the first optical signal into a first electrical signal, wherein the first light receiver is disposed at a position not interfering with each other on an extension line of the linear path of the radiation beam.
In one preferred embodiment of the present application, the first direction is perpendicular to an extending direction of the straight path of the radiation beam.
In one preferred embodiment of the present application, the first direction is parallel to an extending direction of the straight path of the radiation beam.
In one preferred embodiment of the present application, the radiation beam detecting apparatus further includes a processor, which is in communication with the first optical receiver, wherein the processor obtains a relationship between the position and the signal intensity in the first direction according to the first electrical signal.
In one preferred embodiment of the present application, the scintillator further comprises a second side surface adjacent to the front surface, the back surface, and the first side surface; wherein the radiation beam detection apparatus further comprises a second light receiver disposed on the second side surface of the scintillator along a second direction, for acquiring a second optical signal in the second direction generated by the radiation beam entering the scintillator, and converting the second optical signal into a second electrical signal; and wherein the second light receiver is disposed at a position not interfering with the extension line of the straight path of the radiation beam.
In one preferred embodiment of the present application, the first direction and the second direction are both perpendicular to an extending direction of the straight path of the radiation beam.
In one preferred embodiment of the present application, the first light receiver comprises a contact image sensor, and the first light receiver is coupled to the scintillator.
In one preferred embodiment of the present application, the radiation beam detecting apparatus further includes a light shielding layer covering an outer surface of the scintillator exposed to the outside.
The present application also provides a radiation beam detection apparatus comprising: a scintillator for receiving a radiation beam; a set of light receivers coupled to the scintillator for acquiring a set of optical signals in two directions generated by the radiation beam passing through the scintillator along a line path and converting the set of optical signals into a set of electrical signals; and a processor, which is connected with the light receiver group in a communication way, wherein the processor obtains an incidence position of the radiation beam on the scintillator and a position-to-signal intensity relation graph of the radiation beam in the two directions according to the group of electric signals; wherein the light receiver group is disposed at a position not interfering with each other with an extension line of the straight path of the radiation beam.
In one preferred embodiment of the present application, the optical receiver group includes: a first light receiver disposed on a side surface of the scintillator along a first direction, for acquiring a first light signal in the first direction generated by the beam passing through the scintillator, and converting the first light signal into a first electrical signal; and a second light receiver disposed on the other side surface of the scintillator along a second direction, for acquiring a second light signal generated by the beam passing through the scintillator in the second direction, and converting the second light signal into a second electrical signal, wherein the first direction and the second direction are perpendicular.
In contrast to the prior art, the present application captures light generated by the interaction of a scintillator material with a beam of radiation passing through the scintillator by coupling a set of light receivers to the scintillator. By analyzing the measured optical signal, information such as the size, position, intensity distribution, and dose distribution of the radioactive substance of the outgoing beam can be obtained. By this design, the light receiver group can not only accurately capture the visible light emitted by the scintillator, but also miniaturize the overall configuration of the radiation beam detecting apparatus. Furthermore, by disposing the light receiver so as not to be located on the traveling path of the radiation beam, it is possible to effectively prevent the light receiver from being directly bombarded by the radiation beam to cause malfunction or damage.
FIG. 1 shows a schematic diagram of a prior art scintillation detector;
FIG. 2 is a schematic diagram of another scintillation detector of the prior art;
fig. 3 shows a schematic view of a radiation beam detecting apparatus of a first preferred embodiment of the present application;
FIG. 4 is a graph showing the relationship between the position of a radiation beam in one direction and the signal intensity obtained by the radiation beam detecting apparatus of FIG. 3;
fig. 5 is a beam information diagram created by the processor of the radiation beam detecting apparatus of fig. 3 based on electric signals of radiation beams in two directions;
fig. 6 shows a schematic view of a radiation beam detecting apparatus of a second preferred embodiment of the present application;
fig. 7 shows a schematic view of a radiation beam detecting apparatus of a third preferred embodiment of the present application; and
fig. 8 is a graph showing the relationship between the position in one direction and the signal intensity of the radiation beam acquired by the radiation beam detecting apparatus of fig. 7.
In order to make the aforementioned and other objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Referring to fig. 3, a schematic diagram of a radiation beam detecting apparatus 3 according to a preferred embodiment of the present application is shown. The radiation beam detection apparatus 3 includes a scintillator 31, a light receiver group 32, and a processor 33. The scintillator 31 is made of a scintillator material that emits visible light after absorbing energy. The light receiver group 32 is disposed on the outer periphery of the scintillator 31. The processor 33 is communicatively connected to the group of light receivers 32. The radiation beam detection device 3 of the present application excites electrons in crystals or molecules in the scintillator 31 to an excited state with free radiation by entering the radiation beam 91 into the scintillator 31, emits fluorescence when the electrons return from the excited state to a ground state, then converts the collected fluorescence into an electric signal by the group of light receivers 32, and performs a series of corresponding processes on the electric signal by the processor 33 to complete the detection of the deflection angle. The specific structure of the scintillator 31, the light receiver group 32, and the processor 33 will be described in detail later.
As shown in fig. 3, the scintillator 31 is a rectangular flat plate member, however, the scintillator 31 may take various suitable shapes in other embodiments, not limited thereto. The scintillator 31 includes a front surface 311, a rear surface (not labeled), a first side surface 312, a second side surface 313, wherein the front surface 311 is opposite to the rear surface, the first side surface 312 and the second side surface 313 are adjacent to each other, and the first side surface 312 and the second side surface 313 are both adjacent to the front surface 311 and the rear surface. The front surface 311 of the scintillator 31 is aligned with the radiation source 9 for receiving the radiation beam 91 emitted by the radiation source 9. The radiation beam 91 is incident on the front surface 311 of the scintillator 31 at an angle along a straight path 911. Preferably, the radiation beam 91 is perpendicularly incident on the front surface 311 of the scintillator 31. In the present embodiment, the front surface 311 of the scintillator 31 is disposed in the X-Y plane, and the radiation beam 91 is incident in the Z direction. The radiation beam 91 passes through the scintillator 31 and exits from the rear surface of the scintillator 31.
As shown in fig. 4, the light receiver group 32 includes a first light receiver 321 and a second light receiver 322. The first light receiver 321 is disposed on the first side surface 312 of the scintillator 31 along a first direction (for example, the X direction), and is configured to acquire a first light signal that is projected on the first side surface 312 and is in the first direction and generated by the radiation beam 91 entering the scintillator 31, and convert the first light signal into a first electrical signal. The second light receiver 322 is disposed on the second side surface 313 of the scintillator 31 along a second direction (e.g., Y direction), and is configured to acquire a second light signal projected on the second side surface 313 and in the second direction by the radiation beam 91 entering the scintillator 31 and convert the second light signal into a second electrical signal. In the present embodiment, the first direction and the second direction are perpendicular to the extending direction (for example, Z direction) of the straight path 911 of the radiation beam 91. It should be noted that the first light receiver 321 and the second light receiver 322 are both disposed at positions that do not interfere with each other on the extension 912 of the straight path 911 of the radiation beam 91. That is, the radiation beam 91 does not directly irradiate the first light receiver 321 and the second light receiver 322, and the beam emitted after the radiation beam 91 passes through the scintillator 31 does not directly irradiate the first light receiver 321 and the second light receiver 322. By disposing the light receiver group 32 so as not to be located on the traveling route of the radiation beam 91, it is possible to effectively prevent the light receiver group 32 from being directly bombarded by the radiation beam 91 to cause malfunction or damage. By this design, the radiation beam detecting apparatus 3 can be used to detect radiation beams having high energy and high penetration characteristics, such as photon beams having an energy range of 1 million electron volts (MeV) to 30MeV, electron beams having an energy range of 1MeV to 30MeV, proton beams having an energy range of 3MeV to 300MeV, or heavy particle beams having an energy range of 30MeV/u to 800 MeV/u.
Preferably, the first light receiver 321 and the second light receiver 322 may be image sensors, such as Contact Image Sensors (CIS). The first light receiver 321 and the second light receiver 322 are directly coupled to the scintillator 31, or indirectly coupled to the scintillator 31 through a substance such as an adhesive. With this design, the light receiver group 32 can not only accurately capture the visible light emitted from the scintillator 31, but also miniaturize the overall configuration of the radiation beam detecting apparatus 3, reduce the production cost, facilitate the installation, and the like.
As shown in fig. 3, the processor 33 is electrically connected to the first light receiver 321 and the second light receiver 322 through respective transmission lines 331. Alternatively, the processor 33 may also be wirelessly connected to the first optical receiver 321 and the second optical receiver 322, but is not limited thereto. The processor 33 may generate a map of the position of the radiation beam in the first direction or in the second direction versus the signal intensity from the acquired first electrical signal or second electrical signal. Further, the processor 33 may also create a beam information map containing information on the size, position, intensity distribution, and the like of the radiation beam 91 from the acquired first electric signal and second electric signal. Specifically, the processor 33 includes a data acquisition unit, a data processing unit, and an image processing unit. The processor 33 obtains the electrical signals from the photo-receiver group 32 through the data acquisition unit and stores the electrical signals to the data processing unit. The data processing unit may perform a number of functions, such as gain correction, edge detection, sharpening, contrast enhancement, etc., to adapt the data for subsequent processing or image reconstruction. The image processing unit receives the signals obtained by the data processing unit processing to generate an image of a region of interest (ROI) traversed by the radiation beam 91. In this embodiment, the processor 33 may be controlled or implemented by a computer, and a plurality of control instructions are stored in the processor 33, and the processor 33 executes the corresponding processing program according to the corresponding control instructions.
The radiation beam 91 passes through the light generated by the scintillator 31, and information of the radiation beam 91 in different directions can be obtained according to the different positions of the first light receiver 321 and the second light receiver 322. For example, referring to fig. 4, a graph showing a relationship between a position of a radiation beam 91 acquired by the radiation beam detecting apparatus 3 of fig. 3 and a signal intensity in one direction is shown. As shown in fig. 3, the first light receiver 321 and the second light receiver 322 are disposed in an extending direction perpendicular to the straight path 911 of the radiation beam 91. When the radiation beam 91 is incident on the front surface 311 of the scintillator 31 in the Z direction, a map of the position of the radiation beam 91 in one direction versus the signal intensity, that is, the intensity distribution of the radiation beam 91 in the X direction or the Y direction, can be obtained by the first light receiver 321 provided on the first side surface 312 of the scintillator 31 or the second light receiver 322 provided on the second side surface 313 of the scintillator 31.
Further, referring to fig. 5, it shows a beam information chart created by the processor 33 of the radiation beam detecting apparatus 3 of fig. 3 based on the electric signals of the radiation beam 91 in two directions. When the radiation beam 91 is incident on the front surface 311 of the scintillator 31 in the Z direction, the sectional information of the radiation beam 91 on the X-Y plane can be obtained by the first light receiver 321 provided to the first side surface 312 of the scintillator 31 and the second light receiver 322 provided to the second side surface 313 of the scintillator 31. Specifically, after the processor 33 obtains the intensity distributions of the radiation beam 91 in the X-direction and the Y-direction, the processor 33 reconstructs the signals in each direction in real time, and combines the obtained results to obtain the data such as the beam pattern of the radiation beam 91 in the X-Y plane, for example, the information such as the size, the position, the intensity distribution, and the like of the radiation beam 91. As shown in fig. 5, the processor 33 obtains an incident position where the radiation beam 91 is incident on the scintillator 31 and a gaussian distribution of signal intensity of the radiation beam 91 on the X-Y plane from a set of electrical signals sensed by the light receiver group 32. For example, the beam information diagram of fig. 5 contains 3 concentric circles, where the circle at the innermost circle represents the 1-sigma standard deviation of signal strength, and so on, the circle at 2 represents the 2-sigma standard deviation of signal strength, and the outermost circle represents the 3-sigma standard deviation of signal strength.
Referring to fig. 6, a schematic diagram of a radiation beam detecting apparatus 4 according to a second preferred embodiment of the present application is shown. The radiation beam detection apparatus 4 includes a scintillator 41, a light receiver group 42, and a processor 43. The scintillator 41 includes a front surface 411, a rear surface (not labeled), a first side surface 412, and a second side surface 413. The light receiver group 42 includes a first light receiver 421 disposed on the first side surface 412 and a second light receiver 422 disposed on the second side surface 413. The front surface 411 of the scintillator 41 is aligned with the radiation source 9 for receiving the radiation beam 91 emitted by the radiation source 9. The radiation beam 91 is incident on the front surface 411 of the scintillator 41 at an angle along a straight path. It should be noted that the radiation beam detecting apparatus 4 of the second preferred embodiment is substantially the same as the radiation beam detecting apparatus 3 of the first preferred embodiment, with the difference that the radiation beam detecting apparatus 4 of the second preferred embodiment further includes a light shielding layer 44.
As shown in fig. 6, the light shielding layer 44 is provided on the outer surface of the scintillator 41 and covers the outer surface of the scintillator 41 exposed to the outside. Specifically, the light shielding layer 44 covers all the outer surfaces except the contact surfaces of the scintillator 41 and the light receiver group 42. By this design, on the premise of not affecting the measurement of the light receiver group 42, the light shielding layer 44 is configured to completely cover the outer surface of the scintillator 41 exposed to the outside, so that the light receiver group 42 is not interfered by external light, and the visible light emitted by the scintillator 41 can be accurately obtained. Alternatively, the light shielding layer 44 may be formed by coating the scintillator 41 with a light-impermeable thin material (e.g., paper, aluminum foil, or the like), or may be formed by applying a light-impermeable paint to the scintillator 41. It should be understood that the light-shielding layer may be disposed in other embodiments, but is not limited thereto.
Referring to fig. 7, a schematic diagram of a radiation beam detecting apparatus 5 according to a third preferred embodiment of the present application is shown. The radiation beam detection apparatus 5 includes a scintillator 51, a first light receiver 52, and a processor 53. The scintillator 51 includes a front surface 511, a rear surface (not labeled), a first side surface 512, wherein the front surface 511 is opposite the rear surface, and the first side surface 512 is adjacent to the front surface 511 and the rear surface. The front surface 511 of the scintillator 51 is aligned with the radiation source 9 for receiving the radiation beam 91 emitted by the radiation source 9. The radiation beam 91 is incident on the front surface 511 of the scintillator 51 at an angle along a straight path 911. The first light receiver 52 is disposed on the first side surface 512 of the scintillator 51 along a first direction (e.g., Z direction). For acquiring a first optical signal, which is projected on the first side surface 512 and propagates along the first direction, generated by the radiation beam 91 entering the scintillator 51, and converting the first optical signal into a first electrical signal. The processor 33 is communicatively connected to the first optical receiver 52 for performing a series of processing on the received first electrical signal to perform deflection detection of the deflection.
As shown in fig. 7, in the third preferred embodiment, the front surface 511 of the scintillator 51 is disposed in the X-Y plane, and the radiation beam 91 is incident in the Z direction. It should be noted that the scintillator 51 is a rectangular parallelepiped having a certain thickness, and the radiation beam 91 advances in the extending direction of the linear path 911 after entering the scintillator 51 and stops inside the scintillator 51, i.e., the radiation beam 91 does not exit from the rear surface of the scintillator 31 along the extending line 912 of the linear path 911. In the third preferred embodiment, the first direction is parallel to the extending direction (e.g., Z direction) of the straight path 911 of the radiation beam 91. The first light receivers 52 are disposed at positions that do not interfere with each other on an extension 912 of the linear path 911 of the radiation beam 91. That is, the radiation beam 91 does not directly irradiate the first light receiver 52. By disposing the first light receiver 52 so as not to be located on the traveling path of the radiation beam 91, it is possible to effectively prevent the first light receiver 52 from being directly struck by the radiation beam 91 to cause malfunction or damage. By this design, the radiation beam detecting device 5 can be used to detect radiation beams having high energy and high penetration characteristics, such as photon beams having an energy range between 1MeV and 30MeV, electron beams having an energy range between 1MeV and 30MeV, proton beams having an energy range between 3MeV and 300MeV, or heavy particle beams having an energy range between 30MeV/u and 800 MeV/u.
Preferably, the first light receiver 52 may be an image sensor, such as a Contact Image Sensor (CIS). The first light receiver 52 is directly coupled to the scintillator 51, or indirectly coupled to the scintillator 51 through a material such as an adhesive. With this design, the first light receiver 52 can not only accurately capture the visible light emitted from the scintillator 51, but also miniaturize the overall configuration of the radiation beam detecting apparatus 5, reduce the production cost, facilitate the installation, and the like.
As shown in fig. 7, the processor 53 is electrically connected to the first optical receiver 52 through a transmission line 531. Optionally, the processor 53 may also be wirelessly connected to the first optical receiver 52, but is not limited thereto. The processor 53 may generate a map of the position of the radiation beam 91 in the first direction versus the signal intensity from the acquired first electrical signal. It should be noted that the processor 53 of the third preferred embodiment is substantially the same as the processor 33 of the first preferred embodiment, and will not be described herein.
The radiation beam 91 passes through the light generated by the scintillator 31, and information on the direction of the radiation beam 91 can be obtained depending on the position where the first light receiver 52 is placed. For example, fig. 8 shows a relationship between the position of the radiation beam 91 acquired by the radiation beam detecting apparatus 5 of fig. 7 in one direction and the signal intensity. As shown in fig. 7, the first light receiver 52 is disposed in an extending direction parallel to the straight path 911 of the radiation beam 91. When the radiation beam 91 is incident on the front surface 511 of the scintillator 51 in the Z direction, a map of the position of the radiation beam 91 in one direction versus the signal intensity, that is, the intensity distribution of the radiation beam 91 in the Z direction, can be obtained by the first light receiver 52 provided on the first side surface 512 of the scintillator 51. Furthermore, the distance traveled by the radiation beam 91 after entering the scintillator 51 under specific parameters (e.g., radiation dose, emission intensity) can be obtained from the relationship between the position in the Z direction and the signal intensity, and the relationship between the depth intensity and the dose curve of the radiation beam 91 after entering the human body can be simulated.
In summary, the present application captures light generated by a radiation beam interacting with a scintillator material as the radiation beam passes through the scintillator by directly coupling a light receiver to the scintillator. By analyzing the measured optical signal, information such as the size, position, and intensity distribution of the radiation beam can be obtained to determine the dose and distribution of the radioactive substance. By this design, the light receiver can not only accurately capture the visible light emitted from the scintillator, but also miniaturize the overall configuration of the radiation beam detecting apparatus. Furthermore, by disposing the light receiver so as not to be located on the traveling path of the radiation beam, it is possible to effectively prevent the light receiver from being directly bombarded by the radiation beam to cause malfunction or damage.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
- A radiation beam detecting apparatus comprising:a scintillator comprising a front surface, a back surface opposite the front surface, and a first side surface adjacent the front and back surfaces, wherein a radiation beam is angularly incident to the front surface of the scintillator along a linear path; anda first light receiver provided along a first direction on the first side surface of the scintillator, for acquiring a first optical signal in the first direction generated by the radiation beam entering the scintillator, and converting the first optical signal into a first electrical signal, wherein the first light receiver is provided at a position not interfering with each other on an extension line of the linear path of the radiation beam.
- A radiation beam detecting apparatus according to claim 1, wherein said first direction is perpendicular to an extending direction of said straight path of said radiation beam.
- A radiation beam detecting apparatus according to claim 1, wherein said first direction is parallel to an extending direction of said straight path of said radiation beam.
- A radiation beam detecting apparatus according to claim 1, wherein said radiation beam detecting apparatus further comprises a processor communicatively connected to said first optical receiver, wherein said processor obtains a position-to-signal intensity relationship map in said first direction from said first electrical signal.
- A radiation beam detecting apparatus according to claim 1, wherein said scintillator further comprises a second side surface adjacent to said front surface, said rear surface, and said first side surface;wherein the radiation beam detection apparatus further comprises a second light receiver provided along a second direction on the second side surface of the scintillator for acquiring a second light signal in the second direction generated by the radiation beam entering the scintillator and converting the second light signal into a second electrical signal; andwherein the second light receiver is disposed at a position not interfering with the extension line of the straight path of the radiation beam.
- A radiation beam detecting apparatus according to claim 5, wherein said first direction and said second direction are both perpendicular to an extending direction of said straight path of said radiation beam.
- A radiation beam detecting apparatus according to claim 1, wherein said first light receiver comprises a contact image sensor, and said first light receiver is coupled to said scintillator.
- A radiation beam detecting apparatus according to claim 1, wherein said radiation beam detecting apparatus further comprises a light shielding layer covering an outer surface of said scintillator exposed to the outside.
- A radiation beam detecting apparatus comprising:a scintillator for receiving a radiation beam;a set of light receivers coupled to the scintillator for acquiring a set of optical signals in two directions generated by the radiation beam passing through the scintillator along a straight path and converting the set of optical signals into a set of electrical signals; anda processor communicatively connected to the set of light receivers, wherein the processor obtains an incident position of the radiation beam incident on the scintillator and a position-to-signal intensity relationship map of the radiation beam in the two directions from the set of electrical signals;wherein the light receiver group is disposed at a position not interfering with each other with an extension line of the straight path of the radiation beam.
- A radiation beam detecting apparatus according to claim 9, wherein said light receiver group comprises:a first light receiver disposed on a side surface of the scintillator along a first direction, for acquiring a first light signal in the first direction generated by the beam passing through the scintillator, and converting the first light signal into a first electrical signal; andand the second light receiver is arranged on the other side surface of the scintillator along a second direction and used for acquiring a second light signal in the second direction generated by the beam passing through the scintillator and converting the second light signal into a second electric signal, wherein the first direction is vertical to the second direction.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2019/095634 WO2021003744A1 (en) | 2019-07-11 | 2019-07-11 | Radiation beam detection device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000235078A (en) * | 1999-02-15 | 2000-08-29 | Toshiba Corp | Radiation detecting structural body, and radiation detector and radiation inspection device using same |
| US7612342B1 (en) * | 2005-09-27 | 2009-11-03 | Radiation Monitoring Devices, Inc. | Very bright scintillators |
| CN103984000A (en) * | 2013-02-08 | 2014-08-13 | 株式会社岛津制作所 | Radiation detector and method for manufacturing radiation detector |
| CN104459757A (en) * | 2013-09-20 | 2015-03-25 | 株式会社东芝 | Radiation detector and radiation detection apparatus |
| CN105339810A (en) * | 2013-06-28 | 2016-02-17 | 皇家飞利浦有限公司 | Semiconductor scintillation detector |
| CN105723243A (en) * | 2013-11-15 | 2016-06-29 | 皇家飞利浦有限公司 | Double-sided organic photodetector on flexible substrate |
| CN105866818A (en) * | 2015-02-06 | 2016-08-17 | 赛默飞世尔科学测量技术有限公司 | Device and method for detection of radioactive radiation |
| CN108152849A (en) * | 2016-12-02 | 2018-06-12 | 株式会社岛津制作所 | Radiation detecting apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015049085A (en) * | 2013-08-30 | 2015-03-16 | 株式会社島津製作所 | Radiation monitor |
| JP6524484B2 (en) * | 2015-02-17 | 2019-06-05 | 国立研究開発法人日本原子力研究開発機構 | Radiation measurement method and radiation measurement apparatus |
| CN105784734B (en) * | 2016-03-02 | 2019-04-16 | 中国科学院上海应用物理研究所 | A kind of scintillator detection system |
| CN206906590U (en) * | 2017-06-20 | 2018-01-19 | 同方威视技术股份有限公司 | Back scattering detecting module |
| TWM583541U (en) * | 2019-06-06 | 2019-09-11 | 定垣企業有限公司 | Radiation beam detector |
-
2019
- 2019-07-11 WO PCT/CN2019/095634 patent/WO2021003744A1/en active Application Filing
- 2019-07-11 JP JP2021576917A patent/JP2022540010A/en active Pending
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000235078A (en) * | 1999-02-15 | 2000-08-29 | Toshiba Corp | Radiation detecting structural body, and radiation detector and radiation inspection device using same |
| US7612342B1 (en) * | 2005-09-27 | 2009-11-03 | Radiation Monitoring Devices, Inc. | Very bright scintillators |
| CN103984000A (en) * | 2013-02-08 | 2014-08-13 | 株式会社岛津制作所 | Radiation detector and method for manufacturing radiation detector |
| CN105339810A (en) * | 2013-06-28 | 2016-02-17 | 皇家飞利浦有限公司 | Semiconductor scintillation detector |
| CN104459757A (en) * | 2013-09-20 | 2015-03-25 | 株式会社东芝 | Radiation detector and radiation detection apparatus |
| CN105723243A (en) * | 2013-11-15 | 2016-06-29 | 皇家飞利浦有限公司 | Double-sided organic photodetector on flexible substrate |
| CN105866818A (en) * | 2015-02-06 | 2016-08-17 | 赛默飞世尔科学测量技术有限公司 | Device and method for detection of radioactive radiation |
| CN108152849A (en) * | 2016-12-02 | 2018-06-12 | 株式会社岛津制作所 | Radiation detecting apparatus |
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| CN114096889B (en) | 2023-07-18 |
| WO2021003744A1 (en) | 2021-01-14 |
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