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公开(公告)号：FR2315099A1
公开(公告)日：1977-01-14
申请号：FR7519412
申请日：1975-06-20
Applicant: CGR MEV
Inventor： BOUX RENE , LEVAILLANT CLAUDE
IPC: A61N1/40 , A61B6/10 , A61N5/10 , F02B1/04 , G01R29/00 , G01T1/15 , G01T1/17 , G01T7/12 , H05G1/42 , G01T1/161 , G01T7/00 , G06M3/02
Abstract: Device making it possible to check, prior to or after each irradiation treatment session, the proper operation of the dose-measuring systems associated with a radiotherapy apparatus and comprising at least one dose-measuring circuit equipped with a counter system of preselect design. This device comprises a pulse generator G, means for applying said pulses to the counter system of at least one of the measuring circuits and means making it possible to halt the generator G and reset the counter system to zero when coincidence occurs between the preselected number of pulses corresponding to a preselected dose level D and the displayed number of pulses corresponding to the dose level effectively delivered by an irradiation source S.
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2.发明专利
公开(公告)号：CA1036717A
公开(公告)日：1978-08-15
申请号：CA229349
申请日：1975-06-13
Applicant: CGR MEV
Inventor： BOUX RENE
Abstract: The present invention relates more particularly to the structure of the electrodes arranged in the ionization chambers of a device for monitoring the position, intensity, uniformity and directivity of an ionization chamber belonging to a device for monitoring ionizing beam constituted by charged or unchanged particles. This monitoring device comprises identical electrodes designed to be disposed in parallel with each other and one below the other, each comprising 2n lamellar elements electrically conductive and electrically insulated from each other by 2n - 1 insulating, parallel bands, n being an integer greater than 1. The 2n lamellar elements of an electrode being disposed symmetrically to either side of an axis splitting one electrode into two equal parts, the insulating bands of the electrode making an angle ? with those of the other electrode. Simplicity of manufacture and utilisation are two of the advantages of these electrodes which can incorporate lamellar elements of the same area.
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公开(公告)号：CA1063259A
公开(公告)日：1979-09-25
申请号：CA254911
申请日：1976-06-15
Applicant: CGR MEV
Inventor： BOUX RENE , LEVAILLANT CLAUDE
IPC: A61N1/40 , A61B6/10 , A61N5/10 , F02B1/04 , G01R29/00 , G01T1/15 , G01T1/17 , G01T7/12 , H05G1/42 , G01T1/105
Abstract: The invention relates to a device making it possible to check, prior to or after each irradiation treatment session, the proper operation of the dose-measuring systems associated with a radiotherapy apparatus and comprising at least one dose-measuring circuit equipped with a counter system of preselect design. This device comprises a pulse generator, a contact breaker for applying the pulses to the counter system of at least one of the measuring circuits and a relay making it possible to halt the generator and reset the counter system to zero when coincidence occurs between the preselected number of pulses corresponding to a preselected dose level and a displayed number of pulses corresponding to the dose level effectively delivered by an irradiation source.
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公开(公告)号：CA1054261A
公开(公告)日：1979-05-08
申请号：CA250736
申请日：1976-04-14
Applicant: CGR MEV
Abstract: A system for measuring radiation doses in radiotherapy comprises two identical metering networks energized in parallel from a common radiation source, each network including an integrating amplifier whose time constant is variable by the shortcircuiting of an input resistor. A manually or automatically reversible switch selectively foreshortens the time constant of one or the other amplifier whereby the corresponding metering network controls the cutoff of the radiation source whenever the emitted radiant energy reaches a predetermined value. The other network, acting as a backup, takes over the radiation cutoff upon failure of the controlling network; this takeover may be indicated by a set of signal lamps jointly controlled by the reversing switch and by a counting unit of the standby network.
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Patent Agency Ranking
公开(公告)号：DE2526116A1
公开(公告)日：1976-01-02
申请号：DE2526116
申请日：1975-06-11
Applicant: CGR MEV
Inventor： BOUX RENE
Abstract: An ionization chamber is peripherally bounded by a stack of four coaxial annular frames with rabbeted confronting faces forming three annular recesses on the peripheral chamber wall, the middle recess receiving a transverse partition whereas the other two recesses form seats for peripheral zones of two dielectric disks with discontinuous metallic coatings constituting mutually insulated segmental electrode elements. The segmental elements terminate short of the peripheral chamber wall, except for a tab extending from each element onto the peripheral disk zone received in the corresponding recess within which that tab is connected to an external lead. The tabs of the two disks are angularly offset from one another, as are the segmental boundaries of their conductive elements.
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7.发明专利
公开(公告)号：CA1041228A
公开(公告)日：1978-10-24
申请号：CA228685
申请日：1975-06-06
Applicant: CGR MEV
Inventor： BOUX RENE , BOURLIER JEAN N
Abstract: A PROCESS FOR CENTRING AN IONIZING RADIATION SWEEP BEAM AND DEVICE FOR CARRYING OUT THIS PROCESS A centring process for detecting the centring errors of a sweep beam impinging on a target and correcting them, this process comprising comparing a signal VE, corresponding to the difference between electric signals received on the two halves of an electrode, with threshold voltages ? ve and comparing a signal VB, corresponding to the voltage controlling the sweep of the beam, with threshold voltages ? vb, the transmission of a signal Vp corresponding to VE > + ve and VB + vb ) indicating the direction of the centring error and its amplitude. The process permits controlling the centring of a sweep beam on secant axes making an angle .theta. therebetween.
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公开(公告)号：DE2627445A1
公开(公告)日：1976-12-23
申请号：DE2627445
申请日：1976-06-18
Applicant: CGR MEV
Inventor： BOUX RENE , LEVAILLANT CLAUDE
IPC: A61N1/40 , A61B6/10 , A61N5/10 , F02B1/04 , G01R29/00 , G01T1/15 , G01T1/17 , G01T7/12 , H05G1/42 , G01T1/16
Abstract: Device making it possible to check, prior to or after each irradiation treatment session, the proper operation of the dose-measuring systems associated with a radiotherapy apparatus and comprising at least one dose-measuring circuit equipped with a counter system of preselect design. This device comprises a pulse generator G, means for applying said pulses to the counter system of at least one of the measuring circuits and means making it possible to halt the generator G and reset the counter system to zero when coincidence occurs between the preselected number of pulses corresponding to a preselected dose level D and the displayed number of pulses corresponding to the dose level effectively delivered by an irradiation source S.
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公开(公告)号：FR2300414A2
公开(公告)日：1976-09-03
申请号：FR7503798
申请日：1975-02-07
Applicant: CGR MEV
Inventor： BOUX RENE
IPC: H01J47/02 , G01T1/29 , H01J37/244 , H01J37/304 , H01J39/28 , A61N1/04 , G01T1/185
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