Radiation protection shield for protection against ionizing radiation

Description

Technical field of the invention

[0001] The present invention relates to the general field of equipment for protection against ionizing radiation.

[0002] It relates more particularly to radiation protection screens, enclosures and barriers which are suitable for ensuring the radiation protection of an operator against ionizing radiation, advantageously in the medical or other environment. State of the art

[0003] In some areas, operators must be able to protect themselves against exposure to ionizing radiation, for example X-rays or gamma rays.

[0004] This is particularly the case for healthcare personnel during certain interventions in the medical field, namely for example examinations such as catheterization, pacemaker insertion, vascular, neurological or urological examinations.

[0005] The operator (technician, doctor, surgeon or other) then uses a structure to protect him against the radiation to which the patient is subjected.

[0006] Among the existing protective structures, radiation protection screens are made up of panels, or assemblies of panels, made of radiation-protective materials to ensure the radiation protection of the operator.

[0007] However, in practice, the operator often does not have concrete, objective and reliable data regarding the radioprotective efficacy of the screen behind which he is working.

[0008] However, current radiation protection screens have diverse and unequal qualities in terms of their radioprotective effectiveness.

[0009] There is therefore a need for a technical solution which would enable the operator to be informed, objectively and during his intervention, about the effectiveness of the protection provided by the radiation protection screen he is using.

[0010] Document US 5,981,964 A describes a radiation-protective screen equipped with radiation sensors. Presentation of the invention

[0011] In order to overcome the aforementioned drawback of the state of the art, the present invention therefore proposes a radiation protection screen which is suitable for ensuring the radiation protection of an operator against ionizing radiation.

[0012] The screen includes a radioprotective wall made of radioprotective material.

[0013] This radioprotective wall comprises two opposite faces: an inner face, opposite which the operator is intended to position himself, and an outer face, opposite which a source of ionizing radiation is intended to be positioned.

[0014] According to the invention, said radiation protection screen is equipped with: first dosimetric measuring means, installed opposite said outer face and adapted to measure a dose of external radiation received on the side of said outer face, second dosimetric measuring means, installed opposite said inner face and adapted to measure a dose of internal radiation received on the side of said inner face, electronic display means, adapted to display information intended for the operator, and control means, coupled to said dosimetric measuring means and to said electronic display means.

[0015] The control means comprise a control module designed to display, on said electronic display means, information relating at least to said measured indoor / outdoor radiation doses.

[0016] In practice, the operator then has concrete, objective and reliable information / data regarding the radioprotective characteristics of the screen behind which he is working.

[0017] This technical solution allows the operator to know, in an objective and direct manner, the effectiveness of the protection provided by the radiation protection screen that he uses during his interventions.

[0018] Other non-limiting and advantageous characteristics of the product in accordance with the invention, taken individually or in all technically possible combinations, are as follows: the control module is designed to display, on said electronic display means, at least information chosen from: a value of the internal radiation dose, a value of the external radiation dose, a differential radiation dose value (corresponding to the difference between said external radiation dose and said internal radiation dose), an attenuation value (corresponding to the ratio between said external radiation dose and said internal radiation dose), which values ​​are advantageously in real time (also called "instantaneous values") and / or in time period (also called "cumulative values"), and which values ​​are advantageously expressed in equivalent dose; the first measuring means are carried by the external face of the radioprotective wall and the second measuring means are carried by the internal face of the radioprotective wall;the electronic display means are carried by the inner face of the radioprotective wall and are arranged so as to be visually accessible by the operator positioned in front of said inner face; the control means are coupled to said measuring means and / or to said electronic display means, by means of wired or wireless connection means; the radioprotection screen comprises means for the removable fixing: of said first dosimetric measuring means facing the outer face of the radioprotective wall, and / or of said second dosimetric measuring means facing the inner face of the radioprotective wall, and / or of the electronic display means facing the inner face of the radioprotective wall;the first dosimetric measuring means, and / or the second dosimetric measuring means, and / or the electronic display means, are each housed in a case removably fixed by magnetization on a metal wall of the screen; the first dosimetric measuring means, and / or the second dosimetric measuring means, and / or the electronic display means, are housed in a case removably fixed by insertion into a support housing fixed on the screen; the first dosimetric measuring means, the second dosimetric measuring means and the electronic display means are powered by electricity from batteries carried by the screen;the first dosimetric measurement means, the second dosimetric measurement means and the electronic display means are each housed in a housing incorporating a battery for their electrical power supply, which housings comprise a connection connector adapted for recharging said batteries from an electricity source; the screen comprises a radioprotective wall comprising a front panel extended by at least one side panel, which front and side panels extend over a height greater than the height of the operator in a standing position, the first dosimetric measurement means and the second dosimetric measurement means being fixed on said side panel, on an area located opposite the head part of said operator, and said electronic display means being fixed on said front panel; the control means comprise an output for coupling it with a remote computer;the control means comprise a memory module, designed to record information relating to the measured indoor / outdoor radiation doses; the electronic display means and the control means consist of a single-unit electronic device.

[0019] The present invention also relates to a dosimetric system, for a radiation protection screen adapted to ensure the radiation protection of an operator against ionizing radiation, said screen comprising a radiation protection wall made of radioprotective material, said radioprotective wall comprising two opposite faces (an inner face, opposite which the operator is intended to position himself, and an outer face, opposite which a source of ionizing radiation is intended to be positioned).

[0020] The dosimetric system includes: first dosimetric measuring means, intended to be implanted opposite said outer face and adapted to measure an external radiation dose received on the side of said outer face, second dosimetric measuring means, intended to be implanted opposite said inner face and adapted to measure an internal radiation dose received on the side of said inner face, electronic display means, adapted to display information intended for the operator, and control means, coupled to said dosimetric measuring means and to said electronic display means, which control means comprise a control module designed to display, on said electronic display means, information relating at least to said measured internal / external radiation doses.

[0021] Of course, the various features, variants and embodiments of the invention may be combined with each other in various combinations to the extent that they are not incompatible or mutually exclusive. Detailed description of the invention

[0022] In addition, various other characteristics of the invention emerge from the appended description given with reference to the drawings which illustrate non-limiting forms of embodiment of the invention and where: there Figure 1 is a general view, in perspective, of a radiation protection screen according to the invention, equipped with the dosimetric system designed in particular to measure the doses of internal / external radiation; Figure 2 is a general view, and from the side, of the radiation protection screen according to the Figure 1 , further illustrating the arrangement of the dosimetric system; Figure 3is a general view, in perspective, of an alternative embodiment of a radiation protection screen according to the invention; Figure 4 is a front view of the radiation protection shield illustrated in the Figure 3 , oriented towards the inner face of its front panel; Figure 5 is a front view of the radiation protection shield illustrated in the Figure 3 , oriented towards the inner face of its side panel; Figure 6 is a sectional view of the radiation protection screen according to section plane 6-6 of the Figure 5 ; there Figure 7 illustrates a possible example of the information likely to be delivered by the electronic display means of the radiation protection screen according to the invention.

[0023] It should be noted that, in these figures, the structural and / or functional elements common to the different variants may have the same references.

[0024] Radiation protection screen 1 (also called “screen 1”), illustrated on the figures 1 And 2 , is suitable for ensuring the radiation protection of an operator against ionizing radiation (for example X-rays or gamma rays).

[0025] Such a radiation protection screen 1 is advantageously used in the medical environment, during certain interventions on patients, namely for example during examinations such as catheterization, pacemaker insertion, vascular, neurological or urological examinations.

[0026] The screen 1 is presented here in the form of a mobile cabin comprising casters 1a for supporting the ground to facilitate its movement.

[0027] The operator (technician, doctor, surgeon or other) is intended to position himself behind this radiation protection screen 1, so as to protect himself against the radiation to which the patient is subjected.

[0028] For this purpose, this screen 1 includes a radioprotective wall 2 made of radioprotective material.

[0029] This radioprotective material, which is classic in itself, is chosen, for example, from lead, steel, a plastic material loaded with radioprotective metal particles or even glass loaded with radioprotective metal particles.

[0030] The radiation-protective wall 2 consists of a panel or assembly of panels, generally extending vertically or at least approximately vertically over a height greater than the height of the operator in a standing position.

[0031] This radioprotective wall 2 advantageously comprises a front panel 21 which is optionally extended by at least one side panel 22 (in this case by two side panels 22 each extending one of the sides of the front panel 21).

[0032] The radioprotective wall 2 comprises two opposite faces: an inner face 25 (visible on the Figure 2 ), opposite which the operator is intended to position himself, and an external face 26, opposite which the source of ionizing radiation is intended to be located.

[0033] The screen 1 is thus intended to reduce, or even eliminate, the passage of ionizing radiation through the radioprotective wall 2. In other words, this screen 1 allows a reduction, or even elimination, of the radiation dose from the outer face 26 to the inner face 25 of the radioprotective wall 2.

[0034] According to the present invention, this screen 1 is equipped with functional means which will provide the operator with concrete, objective and reliable data / information regarding its radioprotective effectiveness.

[0035] These functional means are advantageously presented in the form of a dosimetric system 5 which comprises a combination of electronic components.

[0036] The radiation protection screen 1 is equipped, via the dosimetric system 5, with a pair of dosimetric measuring means: first dosimetric measuring means 6, adapted to measure an external radiation dose D received (also called “measured”) on the side of said external face 26, and second dosimetric measuring means 7, adapted to measure an internal radiation dose Ri received (also called “measured”) on the side of said inner face 25.

[0037] In other words, the first dosimetric measuring means 6 are intended to be interposed between the source of ionizing radiation and the screen 1, so as to measure the external radiation dose. Dreceived by the outer face 26; the second dosimetric measuring means 7 are intended to be positioned opposite the inner face 25, so as to measure the radiation dose Ri which would be likely to cross screen 1.

[0038] "Radiation dose" is advantageously understood to mean the quantity of energy communicated to a medium by ionizing radiation. This radiation dose is advantageously expressed in µSv or mSv or Gy (gray).

[0039] More specifically, "radiation dose" preferably includes absorbed dose, equivalent dose, effective dose, radioactive dose rate or dose equivalent rate.

[0040] Absorbed dose is the amount of energy absorbed at a point per unit mass of matter (inert or living). It is expressed in Grays (Gy) or J / kg.

[0041] The equivalent dose is the product of the dose absorbed in a tissue or organ, by a weighting factor taking into account the biological effect linked to the nature and energy of the radiation. It is expressed in Sievert (Sv).

[0042] The effective dose, also expressed in Sievert, corresponds to the sum of the weighted equivalent doses delivered by internal and external exposure to the different tissues and organs of the body.

[0043] The radioactive dose rate determines the intensity of irradiation (energy absorbed by matter per unit of mass and time). It is measured in Gray per second (Gy / s).

[0044] The dose equivalent rate corresponds to the rate of absorbed dose quantity, weighted for biological effects by different quality factors depending on the radiation. It is expressed in Sievert per second (Sv / s).

[0045] In this case, the first dosimetric measuring means 6 are installed opposite the outer face 26. These first measuring means 6 are preferably still carried by this outer face 26 of the radioprotective wall 2.

[0046] The second dosimetric measuring means 7 are installed opposite the inner face 25. Preferably, these second dosimetric measuring means 7 are carried by the inner face 25 of the radioprotective wall 2.

[0047] Preferably, the first dosimetric measuring means 6 and / or the second dosimetric measuring means 7 are each integrated into a support box which is removably fixed to the screen 1, or which is removably carried by the screen 1. The corresponding boxes can, for example, be fixed by magnetization to a metal part of the frame of the screen 1; as a variant, they can be placed in suitable receiving housings / receptacles, themselves appropriately fixed to the screen 1.

[0048] The first dosimetric measuring means 6 and the second dosimetric measuring means 7 are advantageously installed at a height, relative to the ground, ranging from 1500 to 1900, preferably ranging from 1600 to 1800 mm (advantageously corresponding to a height of the operator's head, in particular of his eyes or even of his temporal lobe located on the side of the radioactive source).

[0049] The first dosimetric measuring means 6 and the second dosimetric measuring means 7 may be arranged opposite each other (i.e. one opposite the other) and sandwich the radioprotective wall 2; alternatively, the first dosimetric measuring means 6 and the second dosimetric measuring means 7 may be offset.

[0050] These first dosimetric measuring means 6 and second dosimetric measuring means 7 can be installed on one of the sides of the front panel 21 (as illustrated in the figures 1 And 2 ), or on one of the side panels 22 (in particular on the side panel intended to be located on the side of the radioactive source).

[0051] To measure such radiation doses, the dosimetric measuring means 6, 7 advantageously consist of at least two individual electronic devices which are each capable of measuring / determining external exposure to ionizing radiation of the dose received for the whole body.

[0052] Such dosimetric measuring means 6, 7 are advantageously chosen from conventional dosimeters per se, preferably electronic dosimeters.

[0053] These dosimeters preferably consist of operational or active dosimeters, capable of measuring / collecting the radiation dose received in real time. They can be of the Geiger-Muller radiation counter type.

[0054] The support boxes of the first and second dosimetric measuring means 6, 7 advantageously integrate a battery to ensure their energy autonomy. And the boxes in question include a connection connector adapted for recharging the battery from an electricity source. This recharging operation is facilitated by the removable mounting of the boxes on the screen 1.

[0055] For the implementation of these dosimetric measuring means 6, 7, as illustrated in the Figure 2 , the radiation protection screen 1 is still equipped: electronic display means 8, adapted to display information / data intended for the operator, and control means 9, coupled to the dosimetric measurement means 6, 7 (for processing the collected data) and to the electronic display means 8 (to control the information broadcast to the operator).

[0056] The electronic display means 8 and the control means 9 are advantageously housed in the same support box which advantageously integrates a battery, to ensure energy autonomy.

[0057] Here again, the corresponding box includes a connection connector suitable for recharging the battery from an electricity source.

[0058] According to an alternative embodiment, the screen 1 may include a rechargeable battery suitable for supplying electricity to the dosimetric measurement means 6, 7, the electronic display means 8 and the control means 9 by means of a wired network.

[0059] Preferably, the electronic display means 8, with possibly the control means 9, are carried by the inner face 25 of the radioprotective wall 2. Their support housing can be carried removably by the screen 1, by magnetization or by integration into a support housing / receptacle; This removable mounting of the housing on the screen 1 facilitates the operation of recharging the integrated battery.

[0060] They are further arranged so as to be visually accessible by the operator positioned in front of this interior face 25 during his intervention.

[0061] Such electronic display means 8 are advantageously in the form of an output device, for example a screen (or monitor).

[0062] The control means 9 advantageously consist of a computer / electronic unit, for example a computer, which comprises: a processing unit, also called a “calculation unit” or “processor”, and data storage means containing a database and at least one computer program.

[0063] The connection of the control means 9 with, on the one hand, the dosimetric measuring means 6, 7 and, on the other hand, the electronic display means 8, is preferably implemented by means of wireless connection means (Wifi, Bluetooth, ZigBee, etc.), not shown. Alternatively, this connection can be wired.

[0064] According to a preferred embodiment, the electronic display means 8 and the control means 9 consist of a single-piece electronic device (common housing), for example of the tablet type, possibly a touch tablet.

[0065] In the case of wireless connection means, the dosimetric measurement means 6, 7 are advantageously equipped respectively with a wireless transmitter / receiver communication module.

[0066] The control means 9 comprise a control module 91 designed to display, on the electronic display means 8, information / data relating at least to the doses of internal radiation. Ri / exterior D measured.

[0067] Such a control module 91 is preferably chosen from computer programs comprising instructions which, when the program is executed by a computer, cause said computer to display, on the electronic display means 8, information / data relating at least to the doses of internal radiation. Ri / exterior D measured.

[0068] By "information / data relating at least to doses of internal radiation Ri / exterior D measured”, we advantageously include: the values ​​of indoor radiation doses Ri / exterior D measured, as such, displayed directly after their respective measurements, and / or values ​​derived from these internal radiation doses Ri / exterior D measured, resulting from processing by this same control module 91.

[0069] Preferably, the control module 91 is designed to display, on the electronic display means 8, at least information chosen from: the value Ri of the internal radiation dose, collected by the second dosimetric measuring means 7 (installed opposite said internal face 25), the value Dof the external radiation dose, collected by the first dosimetric measuring means 6 (installed opposite the external face 26), a differential radiation dose value, corresponding to the difference between said external radiation dose D and said internal radiation dose Ri , an attenuation coefficient value of the screen 1, an attenuation value, corresponding to the ratio between said external radiation dose (Re) and said internal radiation dose (Ri), advantageously expressed as a percentage of said external radiation dose (Re).

[0070] The values ​​displayed on the electronic display means 8 advantageously include: real-time or instantaneous values ​​(“real-time” mode), and / or values ​​over a period of time or cumulative (“monitoring” mode), for example over the time of an examination or an intervention, of particular interest for dosimetric monitoring.

[0071] The cumulative value can be individualized for a given user, with a means of user recognition (badge, etc.).

[0072] These displayed values ​​are advantageously expressed in equivalent dose.

[0073] The control means 9 comprise a memory module 92, designed to record information / data relating to internal radiation doses Ri / exterior D measured.

[0074] Such a memory module 92 is preferably selected from computer programs comprising instructions which, when the program is executed by a computer, cause said computer to record the information / data relating to the doses of internal radiation Ri / exterior D measured within data storage means.

[0075] The control means 9 may also comprise an output (not shown), for example in the form of a computer bus (for example a USB port), for connecting a computer peripheral.

[0076] This coupling of the control means 9, wired or wireless, is advantageously carried out with a remote computer, for example in the form of a server.

[0077] This output is useful for data exchange (especially information on indoor radiation doses Ri / exterior Dmeasured) with the remote computer as part of dosimetric monitoring.

[0078] Generally speaking, the radiation protection screen 1 is equipped with the dosimetric system 5, from the outset or added later.

[0079] In a “reported” configuration, the dosimetric system 5 advantageously consists of “autonomous” equipment which is adapted to be reported on an existing radiation protection screen 1 for its improvement / updating.

[0080] Still generally, the different components of the dosimetric system 5 are carried by the radiation protection screen 1, by means of assembly means (possibly via dedicated support members).

[0081] In operation, the radiation protection screen 1 is interposed between the operator and the source of ionizing radiation.

[0082] The operator then positions himself behind the screen 1, opposite its inner face 25.

[0083] During the intervention, the dosimetric system 5 collects the doses of internal radiation Ri / exterior D .

[0084] The dosimetric system 5 also ensures the processing of the data collected by means of the control means 9, and delivers the data relating at least to the doses of internal radiation. Ri / exterior D via electronic display means 8.

[0085] Throughout his intervention, the operator can thus view concrete, objective and reliable data, in "real time" mode and / or in "monitoring" mode, regarding the radioprotective effectiveness of his radioprotection screen 1.

[0086] THE figures 3 to 6 illustrate an alternative embodiment of a screen 1 according to the invention, in the form of a mobile cabin mounted on casters 1a.

[0087] Here again, this screen 1 includes a radioprotective wall 2 made of radioprotective material.

[0088] This radioprotective material, which is classic in itself, is chosen, for example, from lead, steel, a plastic material loaded with radioprotective metal particles or even glass loaded with radioprotective metal particles.

[0089] The radiation-protective wall 2 consists of a panel or assembly of panels, generally extending vertically or at least approximately vertically over a height greater than the height of the operator in a standing position.

[0090] This radioprotective wall 2 here comprises a front panel 21 which is extended on one of its sides by a side panel 22.

[0091] The front panel 21 includes: a lower part 211 fixed relative to the side panel 22 and extending at an angle of the order of 90° relative to the latter, and an upper part 212, movable, pivotally mounted around a vertical axis on the side opposite the side panel 22.

[0092] The radioprotective wall 2, formed from the front panel 21 and the side panel 22, comprises two opposite faces: an inner face 25, opposite which the operator is intended to position himself, and an outer face 26, opposite which the source of ionizing radiation is intended to be located.

[0093] As for the embodiment illustrated on the figures 1 And 2 , screen 1 illustrated on the figures 3 to 6 understand : first dosimetric measuring means 6, adapted to measure an external radiation dose Re received (also called "measured") on the side of the external face 26, second dosimetric measuring means 7, adapted to measure an internal radiation dose Ri received (also called "measured") on the side of the internal face 25, electronic display means 8, adapted to display information / data intended for the operator, and control means 9, coupled to the dosimetric measuring means 6, 7 (for processing the collected data) and to the electronic display means 8 (to control the information broadcast to the operator).

[0094] The first dosimetric measuring means 6 and the second dosimetric measuring means 7 are here arranged opposite each other (i.e. one opposite the other) in the upper part of the side panel 22, in an area located close to the operator's head, and more particularly opposite the operator's temporal lobe located on the side of the radioactive source.

[0095] Preferably, the first dosimetric measuring means 6 and the second dosimetric measuring means 7 are each integrated into a support box which is fixed or carried in a removable manner on the screen 1. The corresponding boxes can, for example, be fixed by magnetization on a metal part of the frame of the screen; as a variant, they can be placed in suitable reception housings, themselves fixed in an appropriate manner on the screen 1.

[0096] The support boxes of the first and second dosimetric measuring means 6, 7 advantageously integrate a battery to ensure their energy autonomy. And the boxes in question include a connection connector adapted for recharging the battery from an electricity source. This recharging operation is facilitated by the removable mounting of the boxes on the screen 1 (the boxes can thus be detached from the screen to be connected to a suitable battery charger).

[0097] The electronic display means 8 and the control means 9 are housed in the same support box fixed in the upper part of the front panel 21, on the inner face 25 side of the screen 1.

[0098] This support box is advantageously carried in a removable manner by the screen 1, by magnetization or by integration into a support housing.

[0099] This support box advantageously integrates a battery, to ensure energy autonomy; and it includes a connection connector suitable for recharging the battery from an electricity source. This recharging operation is facilitated by the removable mounting of the box on the screen 1.

[0100] The control of the electronic display means 8 by the control means 9 from the information received from the dosimetric measurement means 6 and 7 is carried out in the manner described above in relation to the embodiment of the figures 1 And 2 .

[0101] There Figure 7 illustrates a possible example of information that may be delivered by the electronic display means 8.

[0102] The external radiation dose Re detected by the first dosimetric measuring means 6 appears here on the left of the screen. The internal radiation dose Ri detected by the second dosimetric measuring means 7 appears on the right of the screen; and the radiation attenuation value is displayed in the central part.

[0103] The screen can also display other information, for example relating to the battery charge of the dosimetric measuring devices 6 and 7, and the correct functioning of the wireless connection.

Claims

1. A radiation protection screen, that is adapted to ensure the radiation protection of an operator against ionising radiation, said screen comprising a radiation protection wall (2) made of a radiation protection material, said radiation protection wall having two opposite faces: - an inner face (25), opposite which the operator is intended to position himself, and - an outer face (26), opposite which a source of ionising radiation has to be placed, characterized in that said radiation protection screen (1) is fitted with: - first dosimetric measurement means (6), implanted opposite said outer face (26) and adapted to measure an external radiation dose (Re) received on the side of said outer face (26), - second dosimetric measurement means (7), implanted opposite said inner face (25) and adapted to measure an internal radiation dose (Ri) received on the side of said outer face (25), - electronic display means (8), adapted to display information for the operator, and - control means (9), coupled to said dosimetric measurement means (6, 7) and said electronic display means (8), said control means (9) including a control module (91) designed to display, on said electronic display means (8), information relating to at least said measured internal (Ri) / external radiation (Re) doses.

2. The radiation protection screen according to claim 1, characterized in that the control module (91) is designed to display, on said electronic display means (8), at least information chosen among: - a value of the internal radiation dose (Ri), - a value of the external radiation dose (Re), - a differential radiation dose value, corresponding to the difference between said external radiation dose (Re) and said internal radiation dose (Ri), and - an attenuation value, corresponding to the ratio between said external radiation dose (Re) and said internal radiation dose (Ri).

3. The radiation protection screen according to any one of claims 1 or 2, characterized in that the first dosimetric measurement means (6) are carried by the outer face (26) of the radiation protection wall (2) and the second measurement means (7) are carried by the inner face (25) of the radiation protection wall (2).

4. The radiation protection screen according to any one of claims 1 to 3, characterized in that the electronic display means (8) are carried by the inner face (25) of the radiation protection wall (2) and are arranged in such a way as to be visually accessible by the operator standing in front of said inner face (25).

5. The radiation protection screen according to any one of claims 1 to 4, characterized in that the control means (9) are coupled to said dosimetric measurement means (6, 7) and / or to said electronic display means (8), by means of wired or wireless connection means.

6. The radiation protection screen according to any one of claims 1 to 5, characterized in that it comprises means for the removable fastening of: - said first dosimetric measurement means (6) opposite the outer face (26) of the radiation protection wall (2), and / or - said second dosimetric measurement means (7) opposite the inner face (25) of the radiation protection wall (2), and / or - the electronic display means (8) opposite the inner face (25) of the radiation protection wall (2).

7. The radiation protection screen according to claim 6, characterized in that said first dosimetric measurement means (6), and / or said second dosimetric measurement means (7), and / or said electronic display means (8), are each housed in a case removably fastened by magnetization to a metal wall of said screen (1).

8. The radiation protection screen according to claim 6, characterized in that said first dosimetric measurement means (6), and / or said second dosimetric measurement means (7), and / or said electronic display means (8), are housed in a case removably fastened by insertion into a support housing fastened to said screen (1).

9. The radiation protection screen according to any one of claims 1 to 8, characterized in that said first dosimetric measurement means (6), said second dosimetric measurement means (7) and said electronic display means (8) are powered by batteries carried by said screen (1).

10. The radiation protection screen according to claim 9, characterized in that said first dosimetric measurement means (6), said second dosimetric measurement means (7) and said electronic display means (8) are each housed in a case integrating a battery for the powering thereof, said cases comprising a suitable connection system for recharging said batteries from a power source.

11. The radiation protection screen according to any one of claims 1 to 10, characterized in that it comprises a radiation protection wall (2) comprising a front panel (21) extended by at least one lateral panel (22), said front (21) and lateral (22) panels extend over a height higher than the height of said operator in a standing position, said first dosimetric measurement means (6) and said second dosimetric measurement means (7) being fastened to said lateral panel (22), on an area located opposite the head part of said operator, and said electronic display means (8) being fastened on said front panel (21).

12. The radiation protection screen according to any one of claims 1 to 11, characterized in that the control means (9) includes an output for coupling to a remote computer.

13. The radiation protection screen according to any one of claims 1 to 12, characterized in that the control means (9) includes a memory module (92), designed to record the information relating to the measured internal (Ri) / external (Re) radiation doses.

14. The radiation protection screen according to any one of claims 1 to 13, characterized in that the electronic display means (8) and the control means (9) consist of a single-piece electronic device.

15. A dosimetric system, for a radiation protection screen (1) for providing radiation protection of an operator against ionising radiation, said screen comprising a radiation protection wall (2) made of a radiation protection material, said radiation protection wall (2) comprising two opposite faces: an inner face (25), opposite which the operator has to stand, and an outer face (26), opposite which a source of ionising radiation has to be placed, said dosimetric system (5) comprising: - first dosimetric measurement means (6), intended to be implanted opposite said outer face (26) and adapted to measure an external radiation dose (Re) received on the side of said outer face (26), - second dosimetric measurement means (7), intended be implanted opposite said inner face (25) and adapted to measure an internal radiation dose (Ri) received on the side of said inner face (25), - electronic display means (8), adapted to display information for the operator, and - control means (9), coupled to said dosimetric measurement means and said electronic display means (8), said control means (9) including a control module (91) designed to display, on said electronic display means (8), information relating to at least said measured internal (Ri) / external radiation (Re) doses.