KR-102964777-B1 - Imaging detection device that provides multiple shooting modes

KR102964777B1KR 102964777 B1KR102964777 B1KR 102964777B1KR-102964777-B1

Abstract

The present invention is characterized by a setting unit in which an object to be photographed is set; first and second detection units comprising a scintillation crystal that detects radiation emitted from the object to be photographed set in the setting unit and incident on its outer surface and converts it into a scintillation signal, and a light sensor that converts the scintillation signal of the scintillation crystal into an electrical signal; a transfer unit that moves the first and second detection units so that they are sequentially arranged along a predetermined direction or overlap each other; and a signal processing module that converts the electrical signal received from the detection unit into digital data and outputs it. According to the present invention, the objective is to provide an imaging detection device that provides multiple shooting modes by changing the positions of a plurality of radiation imaging detection units to provide various shooting modes suitable for the user's shooting purpose.

Inventors

강지훈

Assignees

전남대학교산학협력단

Dates

Publication Date: 20260513
Application Date: 20231221

Claims (12)

A setting part where the object to be photographed is set; A first and second detection unit comprising a scintillation crystal that detects radiation emitted from the object to be photographed and incident on the outer surface, which is set in the setting unit, and converts it into a scintillation signal, and a photosensor that converts the scintillation signal of the scintillation crystal into an electrical signal; A transfer unit that moves the first and second detection units so that they are sequentially arranged along a predetermined direction or overlap each other; and A signal processing module that converts electrical signals received from the first and second detection units into digital data and outputs them; is provided. The above transfer unit is A frame adjacent to the above setting part; A first support unit installed on the above frame and supporting the first detection unit opposite the setting unit, and A second support unit is provided, which is installed on the frame to support the second detection unit, and which separates the second detection unit from the first detection unit or overlaps the second detection unit with the first detection unit. The above first support unit is A column member that supports the first detection unit at one end and is installed on the frame at the other end; A first rotating part installed on the column member so that the first detection part rotates with respect to the column member; A first moving part installed on the column member to move the first detection part to be adjacent to or away from the setting part; and A first control unit that controls the first rotation unit and the first movement unit to rotate the first detection unit or move it toward the setting unit; characterized by having An imaging detection device providing multiple shooting modes.
In paragraph 1, The above setting part is provided with a setting surface on which the object to be photographed is set, and The scintillation crystal above extends in a direction intersecting a virtual line orthogonal to the setting plane, and The above optical sensor is characterized by being installed on the end surface in the extension direction of the scintillation crystal. An imaging detection device providing multiple shooting modes.
In paragraph 2, The above transfer unit is characterized by moving the first and second detectors such that the first extension direction in which the scintillation crystal of the first detector is extended and the second extension direction in which the scintillation crystal of the second detector is extended intersect each other at a predetermined angle. An imaging detection device providing multiple shooting modes.
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In paragraph 1, The above second support unit is A movable rail installed on the frame so as to extend in an annular shape having a predetermined radius centered on the first support unit; A movable block installed to be movable along the above-mentioned movable rail; A block driving unit that moves the above-mentioned moving block along the above-mentioned moving rail; A support member that supports the second detection unit at one end and is installed on the moving block at the other end; A second moving part installed on the moving block to move the second detection part adjacent to or away from the setting part; and A second control unit that controls the block driving unit and the second moving unit to rotate the second detection unit around the setting unit or move it toward the setting unit; characterized by having An imaging detection device providing multiple shooting modes.
In paragraph 6, The above second support unit is The device is further characterized by comprising a lifting unit that raises and lowers the above-mentioned movable rail in a direction adjacent to or away from the above-mentioned frame. An imaging detection device providing multiple shooting modes.
In paragraph 1, The above transfer unit is A frame adjacent to the above setting part; A third support unit installed on the frame such that the first and second detection units rotate with respect to the setting unit; and Characterized by having a sliding part installed on the frame to allow the third support unit to be moved along the longitudinal direction of the setting part. An imaging detection device providing multiple shooting modes.
In paragraph 8, The above third support unit is A rotating rail installed on the frame so as to extend in an annular shape having a predetermined radius centered on the setting part; A plurality of rotating blocks installed to be movable along the above-mentioned rotating rail; A rotary drive unit that moves the above-mentioned rotary block along the above-mentioned rotary rail; A rotational support member that supports the first and second detection units at one end and is installed on the rotational block at the other end; A third moving part installed on the rotating block to move the first and second detection parts to be adjacent to or away from the setting part; A third rotating part installed respectively in the first and second detection parts, and configured to rotate the first and second detection parts with respect to the rotating support member; and The present invention is characterized by comprising: a third control unit that controls the rotation drive unit so that the first and second detection units rotate relative to the setting unit and the rotation block moves along the rotation rail, controls the third rotation unit so that the first and second detection units rotate relative to the rotation support member, and controls the first and second detection units to move adjacent to or farther away from the setting unit. An imaging detection device providing multiple shooting modes.
In paragraph 1, The scintillation crystals include Bismuth Germanate (BGO), Lutetium Oxyorthosilicate (LSO), Lutetium Yttrium Oxyorthosilicate (LYSO), Lutetium Aluminum Perovskite (LuAP), Lutetium Yttrium Aluminum Perovskite (LuYAP), Lanthanum Bromide (LaBr3), Lutetium Iodide (LuI3), GSO (Gadolinium oxyorthosilicate), LGSO (lutetium gadolinium oxyorthosilicate), LuAG (Lutetium aluminum garnet), GAGG (Gd3Al2Ga3 O123Al2Ga3O12), LFS (Lutetium Fine Silicate), NaI(Tl) (Thallium doped Sodium Iodide), CsI(Tl) (Thallium activated Cesium) Characterized in that any one of Iodide) is applied, An imaging detection device providing multiple shooting modes.
In paragraph 1, The above optical sensor is characterized by the application of any one of a PN diode, PIN diode, APD, GAPD, or PMT. An imaging detection device providing multiple shooting modes.
In paragraph 2, Characterized by the fact that the extended length of the scintillation crystal is 30 mm or more, An imaging detection device providing multiple shooting modes.

Description

Imaging detection device that provides multiple shooting modes The present invention relates to an imaging detection device that provides multiple shooting modes, and more specifically, to an imaging detection device that provides multiple shooting modes by changing the positions of a plurality of radiation imaging detection units to provide various shooting modes suitable for the user's shooting purpose. Scintillation is a phenomenon in which light is generated simultaneously with radiation irradiation when radiation, such as X-rays, neutrons, or charged particles, is irradiated onto a crystal. A scintillation crystal is a radiation sensor that converts ionizing radiation into light in the visible wavelength range. Radiation information can be obtained by measuring the generated light using photodetectors such as photomultiplier tubes or photodiodes. For example, radiation information obtained by a scintillation crystal can be acquired as a radiation image through a series of processing steps. Scintillation crystals are widely used to measure and image radiation in medical imaging systems such as Computed Tomography (CT), Positron Emission Tomography (PET), gamma cameras, and Single Photon Emission Computed Tomography (SPECT), as well as in various radiation detectors, nuclear power plants, and industrial radiation sensor fields. An ideal scintillation crystal required in most applications must have high density, atomic number, and light output to increase detection efficiency for X-rays or gamma rays, be free of afterglow, and have a short fluorescence decay time for fast detection signal processing. In addition, the emission wavelength of the scintillation crystal must match the characteristics of photodetectors such as photomultiplier tubes or photodiodes, and it must be mechanically robust and have excellent radiation resistance so as to have a long lifespan. Meanwhile, scintillation crystals and optical sensors are designed in various ways depending on the target and purpose to be detected. In particular, the cross-sectional area of the scintillation crystal into which radiation is incident is one of the important design variables that determine the sensitivity and spatial resolution of the radiation detector. Currently, radiation detectors in general use are designed to induce radiation along the longitudinal direction of a scintillation crystal and to attach photosensors to the cross-sectional area of the scintillation crystal. Therefore, although the number of photosensors is inversely proportional to the cross-sectional area of the scintillation crystal, there is a problem that the cost of the radiation detector increases as the cross-sectional area becomes narrower in order to confirm the pre-set imaging area, which requires a large number of scintillation crystals to be arranged. Prior art related to scintillation crystals has been proposed to solve the described problem. The proposed prior art detector with an inserted light guide and a positron emission tomography device using the same (Korean Registered Patent No. 10-1226901) is characterized by including a plurality of scintillation crystals that detect gamma rays incident from the outside and convert them into scintillation signals, and a light guide inserted between the plurality of scintillation crystals to disperse and transmit the scintillation signal converted from one scintillation crystal to another scintillation crystal. It is characterized by being able to easily determine the reaction depth and easily upgrade existing commercially available PET devices to PET devices capable of determining the reaction location by replacing the scintillation crystal section with a multilayer scintillation crystal section with an inserted light guide. As with the prior art described above, conventional scintillation crystal-related technologies provide energy and spatial resolution by injecting radiation in the direction of the cross-sectional area of the scintillation crystal and attaching a photosensor to the longitudinal end; however, there is a problem in that the manufacturing cost of the radiation detector increases because a large number of photosensors are used relative to the volume of the scintillation crystal. FIGS. 1 and 2 are partial cross-sectional views showing the set state of the first and second detection units of an imaging detection device providing multiple shooting modes according to the present invention, and FIG. 3 is a block diagram of FIG. 1, and FIGS. 4 and 5 are perspective views showing the operating state of the transfer unit of FIG. 1, and FIG. 6 is a side view according to a second embodiment of an imaging detection device providing multiple shooting modes according to the present invention, and Fig. 7 is a partial front view of Fig. 6. Hereinafter, an imaging detection device providing multiple shooting modes according to an embodiment of the present invention will be described in detail with reference to the attach