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Heavy ion beam current transverse dosage distribution measuring detector and two-dimensional imaging method thereof

A technology of dose distribution and heavy ion beams, which is applied in measuring devices, radiation measurement, X/γ/cosmic radiation measurement, etc., can solve the problems of poor position resolution and inability to realize in-beam monitoring

Active Publication Date: 2010-12-01
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently widely used two-dimensional ion chamber matrix, such as the Seven29TM two-dimensional ion chamber matrix of PTW Company, also cannot realize on-beam monitoring, and its position resolution is poor.

Method used

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  • Heavy ion beam current transverse dosage distribution measuring detector and two-dimensional imaging method thereof
  • Heavy ion beam current transverse dosage distribution measuring detector and two-dimensional imaging method thereof
  • Heavy ion beam current transverse dosage distribution measuring detector and two-dimensional imaging method thereof

Examples

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Embodiment 1

[0070] Example 1: see figure 1 , 2 3. A heavy ion beam transverse dose distribution measuring detector, comprising a gas-tight chamber 1, which is provided with an ionization inner core 2, and a multi-channel signal adapter plate 3 electrically connected to the ionization inner core 2; The gas-tight cavity 1 is composed of a main body frame 1-1, an incident window 1-2, and an exit window 1-3; the ionization inner core 2 is composed of two sets of ionization chamber units, and each unit ionization chamber is composed of a signal electrode 2- 1. An insulating backing plate 2-2 and a high-voltage pole 2-3; one end of the multi-channel signal adapter plate 3 is provided with a contact end 3-3 inserted into the sealing port 1-5 of the gas sealing chamber 1 and the ionization inner core The signal poles 2-1 of 2 are connected, and the other end is provided with a multi-core connector 3-2 as the signal output port of the beam profile monitoring detector, and the multi-core connector...

Embodiment 2

[0091] Example 2: see figure 1 , 2, 3, a heavy ion beam lateral dose distribution measurement detector, which includes a gas-sealed chamber 1, an ionization inner core 2 and a multi-channel signal adapter board 3; the gas-sealed chamber 1 is composed of a main body frame 1-1 and The incident and exit windows 1-2 are formed; each signal pole 2-1 of the ionization inner core 2 is coated with 40 signal strips 2-1-1, and the two signal poles 2-1 of the ionization inner core of the two units are signaled The directions of bars 2-1-1 are perpendicular to each other.

[0092] In the ionization chamber core 2, the signal pole 2-1 has an effective area of ​​220×220mm 2 40 signal strips 2-1-1 with a width of 5mm are plated on a rigid PCB with a thickness of 0.5mm, and the distance between each signal strip 2-1-1 is 0.5mm.

[0093] In the ionization chamber core 2, the high-voltage pole 2-3 has an effective area of ​​220×220mm 2 It consists of a conductive film and a PCB frame with c...

Embodiment 3

[0100] Embodiment 3: see figure 1 , 2 , 3, a heavy ion beam lateral dose distribution measurement detector, which includes a gas-sealed chamber 1, an ionization inner core 2 and a multi-channel signal adapter board 3; the gas-sealed chamber 1 is composed of a main body frame 1-1 and The incident and exit windows 1-2 are formed; the signal poles 2-1 of the core 2 in the ionization chamber are plated with 60 signal strips 2-1-1, and the signals on the two signal poles 2-1 of the core 2 in the two ionization chambers are The directions of bars 2-1-1 are perpendicular to each other.

[0101] In the ionization chamber core 2, the signal pole 2-1 has an effective area of ​​300×300mm 2 60 signal strips 2-1-1 with a width of 4mm are plated on a rigid PCB with a thickness of 0.2mm, and the distance between each signal strip 2-1-1 is 1mm.

[0102] In the ionization chamber core 2, its high-voltage pole 2-3 has an effective area of ​​300×300mm 2 It consists of a conductive film and a...

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Abstract

The invention relates to the field of heavy ion beam (comprising proton beam) tumor treatment technology, in particular to a heavy ion beam current transverse dosage distribution measuring detector and a two-dimensional imaging method thereof. The detector is mainly characterized by comprising a gas sealing cavity (1) in which an ionization chamber inner core (2) is arranged and a multi-path signal transfer board (3) electrically connected with the ionization chamber inner core (2); the gas sealing cavity (1) consists of a main body framework (1-1), an entrance window (1-2) and an exit window (1-3); the ionization chamber inner core (2) consists of two groups of ionization chamber units, and each ionization chamber unit consists of a signal pole (2-1), an insulating cushion board (2-2) and a high-voltage pole (2-3); and one end of the multi-path signal transfer board (3) is provided with a contact end (3-3) which is inserted into a sealing port (1-5) of the gas sealing cavity (1) and connected with the signal pole (2-1) of the ionization chamber inner core (2), while the other end is provided with a multi-core connector (3-2) which is a signal output port of a beam current profile monitoring detector.

Description

Technical field: [0001] The present invention relates to the field of measurement detection of heavy ion beams (including proton beams) in the treatment of tumors, in particular to the structure and use method of heavy ion beam transverse dose distribution measurement detectors and the heavy ion beam transverse dose distribution measurement detection Two-dimensional imaging method of the device. Background technique: [0002] Heavy ion beam therapy for tumors is a new method of cancer treatment. Its use in radiation therapy has both biological advantages and dose distribution advantages Bragg peak (most of the ion energy is deposited at the end of the range), which can achieve high precision (millimeter level), high efficacy and high safety in clinical radiation therapy . The heavy ion beam used for clinical treatment must pass through the scanning magnet before irradiation, and the original beam spot with a lateral width of less than 10 mm is scanned into an irradiation f...

Claims

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Application Information

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IPC IPC(8): G01T1/29
Inventor 徐瑚珊徐治国唐彬毛瑞士胡正国赵铁成张宏斌郭忠言段利敏孙志宇王建松苏弘肖国青
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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