Cgr Mev

Guy Azam

Andre Bensussan

Guy Convert

Jacques Dufour

Jean P Mabire

Claude Levaillant

Claude Perraudin

Claude Jasmin

Jean M Cosset

Joel Sidi

Duc Tien Tran

Dominique Tronc

Jacques Milcamps

Rene Boux

Jean-Baptiste Gallet

Francois Dugardin

Harry Huber

Emile Mevel

The present invention concerns a device for treatment by hyperthermia, comprising unipolar probes of the implantable type, and comprising circuitry for modifying the distribution forms of the electrical field applied to an aera to be treated.

Device for treatment through hyperthermia

The invention pertains to an apparatus for hyperthermic treatment, especially designed for deep hyperthermia. The treatment apparatus comprises at least two generators operating at different frequencies in such a way as to prevent any phase correlation between the waves delivered by the generators.

Apparatus for hyperthermic treatment

A multioperation accelerator simulating more especially cobalt radiation. According to the invention, an electron accelerator of average energy and a set of targets and filters are provided so as to obtain at least one penetration curve similar to that of cobalt and other closely related curves.

Multioperation accelerator

The present invention concerns a device for treatment by hyperthermia, comprising unipolar probes adapted to be disposed in an area to be treated of a patient, and comprising vector tubes intended to be implanted in the said area to be treated and to contain, at each hyperthermia session the said unipolar probes.

A hyperthermia apparatus primarily applicable to the treatment of tumors comprises at least three high-frequency generators connected to three electrodes. The electrodes are intended to be coupled to a patient's body which constitutes the load, thus producing a higher temperature rise in the vicinity of a fictitious electrode in the body. The generators have adjustable phases and amplitudes, the output of each generator being connected to each of the three electrodes.

Hyperthermia apparatus

A microwave drying device for drying products in the form of grains, comprising a microwave source, at least one waveguide coupled electromagnetically to the microwave source, means for injecting into this waveguide the product to be treated, means for driving this product in the waveguide, means for causing a forced circulation of dry air in the waveguide, means for discharging the air charged with the humidity given up by the product to be treated, and means for collecting the dried product in this waveguide, wherein the waveguide is closed on itself so as to form a ring, a part of this waveguide forming a channel through which the product to be treated may pass, said channel being connected at its ends to pipes for feeding therein and removing therefrom the product, these pipes forming cut-off waveguide.

Microwave drying device for drying products in form of grains

The invention relates to a .gamma.-ray irradiation head for panoramic irradiation comprising a tungsten target revolving about an axis, and means for deflecting electrons around the same axis for producing photons in several directions either successively or simultaneously. When the beam of electrons is deflected in its entirety and when the impact zone moves on the target about the axis, the axis of the radiation lobe moves in the same way and permits irradiation according to a variable azimuth.

.gamma.-Ray irradiation head for panoramic irradiation

Neutron-based radiotherapy apparatus comprising a linear charged-particle accelerator which delivers a beam of accelerated electrons, a target intended to be bombarded by the beam of accelerated electrons for emitting neutrons under the impact of that beam, means for cooling the target, means for eliminating parasitic radiations, and a collimation system for the useful beam of neutrons. The electron accelerator may be arranged either on the inside or on the outside of the rotating arm of the neutron-radiotherapy apparatus.

Neutrontherapy apparatus using a linear accelerator of electrons

An apparatus for treating waste-waters and sludges and using an irradiation beam of accelerated electrons, comprises a treatment circuit c equipped with valves, an electromagnetic regulator providing a constant flow of the fluid to be treated by the irradiation beam, systems for controlling the flow of fluid and for controlling the characteristics of the irradiation beams, a microprocessor associated with the flow control systems for controlling at least the automatic closure of a shut-off valve and the opening of a purge valve.

Apparatus for treating waste-waters and sludges, comprising an

An irradiation apparatus comprising a fluid-tight enclosure in which are located a linear electron accelerator, a magnetron supplying a high frequency signal, means for injecting this high frequency signal into the accelerating structure, means for supplying voltage to the magnetron and the accelerator. A magnetic deflecting system can be associated with the linear accelerator for deflecting the accelerated electrons towards a target emitting X-rays. Cooling systems are provided inside the enclosure 1, in particular for cooling the magnetron.

Compact irradiation apparatus using a linear charged-particle accelerator

A beam of charged particles is guided along a path including a looped section between two rectilinear stretches, each of these stretches being provided with focusing and centering means. A holder insertable into the outgoing stretch, ahead of a collimator, carries a target designed to emit photons upon being struck by incident particles. The target holder is linked with a retracting mechanism which also controls a diaphragm in the looped path section to narrow its aperture when the target is in place. A dose-equalizing filter utilized in the latter instance is movable jointly with the target holder out of the path of the exiting beam.

Radiation device using a beam of charged particles

An arrangement enables the frequency variation of a resonant element (an accelerating section for example) to be followed in dependence upon its temperature and the frequency of the hyperfrequency generator G feeding this resonant element Q to be controlled in dependence upon the frequency variations thereof. The arrangement comprises at least one reference cavity C associated with means for allowing the circulation of cooling fluid along the walls of said reference cavity and with heat supply for bringing it, at any instant, to the temperature of the resonant element Q, means for measuring the amplitude variation .DELTA.a of the signal corresponding to the frequency variation of said reference cavity C in terms of its temperature variation and a frequency variation system controlled by a signal proportional to the amplitude variation .DELTA.a, for modifying the operating frequency of the generator G. This arrangement makes it possible to improve the performance of medical accelerators of which the thermal time constant is considerable in relation to their short operating time.

Arrangement for automatically controlling the frequency of a

A device for furnishing a scanning beam intended for irradiating a target, the irradiating dose level having a predetermined distribution on the target. The device comprises a main magnetic system having a plurality of polepieces for scanning the charged particle beam and a secondary magnetic system having a plurality of polepieces and being located upstream of the main magnetic system for variably offsetting the beam entering the main magnetic system. In a preferred embodiment the main and secondary magnetic systems are provided with quadripoles with respective coils which are supplied in pairs with signals S.sub.X1, S.sub.Y1, and S.sub.X2, S.sub.Y2, the signals S.sub.X1, S.sub.Y1 being for example of 'sawtooth' waveform and those S.sub.X2, S.sub.Y2 of 'squarewave' waveform. The signals may be co-phasal or in phase-opposition.

Device for scanning a target with a beam of charged particles

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 short-circuiting 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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Buc, France

Guy Azam