Radiological cassette with shock absorbers

Abstract

The invention relates to a three-dimensional part (30) intended to cooperate with: a one-piece base (12) comprising a first main face (13), a second main face (14), the base (12) being delimited by four lateral faces (15, 17), the base (12) being able to support a digital detector (11) on the first main face (13) and an electronic card, a mechanical protection housing (20), the base (12), the digital detector (11) and the electronic card (19) being intended to be arranged in the mechanical protection housing (20), the housing (20) comprising four lateral faces (25, 27), a top face (23) and a bottom face (24); the three-dimensional part (30) being characterized in that it comprises: a lower part (31) connected to the base (12) and at least partially enveloping a lateral face (15, 17) of the base (12);an upper part (32) extending from the first main face (13) of the base (12) to the upper face (23) of the housing (20). Figure for the abbreviation: Fig. 2;

Description

Title of the invention: Radiological cassette with shock absorbers

[0001] The invention relates to the field of imaging. It can be applied to any type of imager, particularly X-ray, visible, and infrared imagers. The invention is described here in the field of medical X-ray imaging, by way of example and without loss of applicability to other imaging fields. The invention concerns a portable radiological cassette with shock absorbers that improve the protection of the cassette against drops, impacts from external objects, localized or distributed pressure forces, and any other stresses.

[0002] The cassette includes a digital ionizing radiation detector that provides an image based on the received radiation. The radiological system further includes an ionizing radiation source, such as an X-ray tube, for generating X-rays, and a base station comprising an information processing system for synchronizing the X-ray tube and the detector, and also for performing image processing, such as presenting the operator with an image corrected for all detector defects and enhanced, for example, by edge enhancement. An object whose X-ray image is to be obtained is placed between the source and the detector. Such a system can be used in numerous applications, such as medical radiology and non-destructive testing.The invention can also be implemented for detecting other types of radiation, in particular gamma radiation.

[0003] In the past, radiological systems comprising digital detectors or image intensifier tubes were bulky and not very mobile. It was necessary to position the object relative to the system to obtain the desired image. With the advent of new generations of solid-state detectors, the detector has become less bulky, and it has become possible to move the detector relative to a fixed object. For medical radiology, digital detectors have been developed in the form of mobile cassettes that can be placed in the immediate vicinity of a patient whose image is to be acquired, when the patient's condition prevents them from being moved to a dedicated radiology room. These detectors now have geometric characteristics similar to the older analog cassette or electroluminescent screen detectors.However, they remain more mechanically fragile than these older analog sensors and are particularly more susceptible to breakage of internal components in the event of a fall or violent impact.

[0004] The mobile cassette essentially comprises a digital ionizing radiation detector in the form of a flat panel and an electronic board that notably controls the digital detector. The detector and the board are arranged in a case ensuring their mechanical protection.

[0005] The cassette used in a portable system undergoes much more handling than in a fixed radiological system, and it is necessary to reinforce its mechanical protection, particularly against shocks that the cassette may experience during transport. More specifically, the digital detector is often made from photosensitive components arranged in an array on a glass plate, which forms the most fragile element of the cassette. In addition to shocks that could damage it, this plate is also susceptible to deformation, particularly torsional deformation.

[0006] Portable cassettes must therefore combine extreme resistance to external stresses with a reduced mass and size. Indeed, these portable cassettes may be exposed during handling and throughout their lifespan to drops, impacts from external objects, localized or distributed pressure, and bending stresses when a patient's weight is exerted on a detector that is not supported uniformly. For this reason, the mechanical structure of the detectors must provide maximum protection for the fragile components, namely the digital detector and the electronic board.

[0007] Shocks, vibrations, or internal mechanical play within the cassette result in damage induced by these mechanical stresses. This damage can lead to breakage of the active part of the detector (photodiode array on a glass substrate, possibly encapsulated by a glass cover located above the scintillator), to breakage or damage of the electronic boards or components placed on these boards, to detachment or breakage of the connectors or flexible cables intended to electrically connect the various sub-assemblies, and finally to disturbances in the radiological image caused by vibration of the flexible connectors (also called flexible modules) that ensure electrical contact between the photodiode array and the electronic boards. This damage can occur immediately during mechanical stress and create an instantaneous failure.They can also originate from wear mechanisms related to friction or the repetition of small disturbances throughout the product's lifespan.

[0008] To protect the sensitive parts of a cassette, several solutions are currently implemented. One solution consists of adding layers integrated into an outer protective film. This solution does not protect the panel from internal shocks due to internal movements during a fall and tends to increase the product's size, which is constrained by compliance with dimensional standards for radiological devices.

[0009] Another solution is to add local brackets to the edges of the base. This solution does not protect the modules (flexible connectors) against vibrations or the risk of being pulled out. Furthermore, the absorption capacity is very limited due to the small size of these brackets (the bulk being constrained by the standardized size of the detectors).

[0010] Finally, it is also known to reduce mechanical play. However, to date, there is no simple solution for reducing mechanical play other than tightening the dimensional tolerances of all parts, which impacts the cost, the feasibility of these parts, and the difficulty of assembly.

[0011] All these options offer only partial protection against a limited group of mechanical stresses (shocks, vibrations) and are not entirely satisfactory.

[0012] Figure 1 shows a cross-sectional view of a portable X-ray cassette structure known from the prior art. Typically, a portable X-ray cassette comprises: - A digital ionizing radiation detector 111 in the form of a flat panel extending along an (XY) plane; - A base 112 comprising a first main face 113, a second main face 114, opposite the first main face 113, the base 112 being delimited by four lateral faces 115, 116 (not shown because not visible on the cross-sectional view), 117, 118 shown because not visible on the cross-sectional view), the base 112 supporting the digital detector 111 on the first main face 113; - an electronic card 119 ensuring the management of the digital detector 111; - a mechanical protection case 120, in which are arranged the base 112, the digital detector 111 and the electronic card 119, the case 120 having four lateral faces, a top face 123 and a bottom face 124.

[0013] The portable radiographic cassette 100 of the prior art also includes two elements 107 positioned inside the housing 120, each element 107 being placed against a lateral face of the housing and the base. The two elements 107 act as shock absorbers in the lateral direction, i.e., in a plane parallel to the plane of the base (parallel to the (XY) plane). A foam layer 130 is superimposed along the Z-axis perpendicular to the (XY) plane on the digital detector, and positioned between the digital detector 111 and the upper face 123 of the housing to isolate the detector from shocks along the Z-axis. In other words, in a prior art radiographic cassette, in order to isolate the digital detector and other fragile components of the cassette, it is necessary to have lateral shock-absorbing elements and an additional protective layer to absorb shocks along the Z-axis.

[0014] The shock-absorbing elements 107, designed to absorb shocks, are mounted on the housing and the panel (base assembly and digital detector) is then placed on the The housing. This design does not allow for control of the stress transmission interfaces between the shock-absorbing elements and the panel. The shock-absorbing elements are only effective when stress is applied to the edges of the detector and can therefore be considered as two-dimensional protection. Shocks to the front panel are absorbed solely by the foam layer, which filters shocks and vibrations very little and transmits them directly to the panel without passing through the shock-absorbing elements. Such a prior art radiographic cassette is described in particular in US patent 7989773B2.

[0015] The invention aims to overcome all or part of the problems mentioned above by providing a portable radiological cassette with shock absorbers that protect it against occasional or repeated mechanical stresses that could irreversibly damage the product or impair its performance during use in a disturbed environment. The invention improves the intrinsic mechanical robustness of the cassette by ensuring both the protection of the internal active part of the detector integrated into the external housing during detector drops or violent impacts, the protection of sensitive components during image acquisition that generate image defects due to vibrations, and the reduction of internal mechanical play between the housing and the assembly formed by the base and the digital detector.

[0016] For this purpose, the invention relates to a portable radiological cassette comprising: - A digital ionizing radiation detector in the form of a flat panel; - A one-piece base comprising a first main face, a second main face, opposite the first main face, the base being delimited by four lateral faces, the base supporting the digital detector on the first main face; - an electronic board ensuring the management of the digital detector; - a mechanical protection case, in which the base, the digital detector and the electronic board are arranged, the case having four lateral faces, a top face and a bottom face; the portable radiological cassette comprising at least one three-dimensional part, each of the at least one three-dimensional part being associated with at least one of the four lateral faces of the base, each three-dimensional part comprising: - a lower part connected to the base and at least partially enveloping the at least one lateral face of the base to which the three-dimensional part is associated; an upper part extending from the first main face of the base to the upper face of the case.

[0017] Advantageously, the lower part of at least one of the three-dimensional parts partially envelops a lateral face adjacent to the lateral face of the base to which the three-dimensional part is associated.

[0018] Advantageously, the portable radiological cassette according to the invention further comprises a flexible circuit, and the lower part of at least one of the three-dimensional parts comprises at least one recess for housing the flexible circuit.

[0019] Advantageously, the upper part of at least one of the three-dimensional parts includes at least one opening along an axis substantially perpendicular to the lateral face of the base to which the three-dimensional part is associated.

[0020] Advantageously, the portable radiological cassette according to the invention further comprises a comb including a branch extending substantially parallel to the first main face of the base and in contact with the lower part of the three-dimensional piece, the branch being provided with at least one tooth extending substantially perpendicular to the branch, the at least one tooth being configured to cooperate with the three-dimensional piece so as to immobilize the branch against the flexible circuit.

[0021] Advantageously, at least one tooth is inserted into the opening of the upper part of the three-dimensional part and configured to block the comb in translation in a plane substantially parallel to the base.

[0022] Advantageously, the upper part of at least one of the three-dimensional parts ends with a shape complementary to the upper face of the housing.

[0023] Advantageously, at least one three-dimensional part is made of elastomer, polyurethane, thermoplastic elastomer, polyamide and / or polyester.

[0024] Advantageously, the lower part of at least one three-dimensional piece is glued to the base.

[0025] The invention also relates to a three-dimensional part intended to cooperate with: - a one-piece base comprising a first main face, a second main face, opposite the first main face, the base being delimited by four lateral faces, the base being able to support a digital detector on the first main face and an electronic card, - a mechanical protection housing, the base, the digital detector and the electronic card being intended to be arranged in the mechanical protection housing, the housing comprising four lateral faces, a top face and a bottom face; the three-dimensional piece comprising: - a lower part connected to the base and at least partially enveloping a lateral face of the base; - an upper part extending from the first main face of the base to the upper face of the housing.

[0026] The invention also relates to a computer program product, said computer program comprising computer-executable instructions which, when executed by a processor, cause the processor to command an additive manufacturing device to manufacture the three-dimensional part according to the invention.

[0027] The invention also relates to a method of manufacturing the three-dimensional part according to the invention by additive manufacturing, the method comprising: obtaining an electronic file representing a geometry of a product in which the product is the three-dimensional part; and controlling an additive manufacturing device to manufacture, in one or more additive manufacturing steps, the product according to the geometry specified in the electronic file.

[0028] The invention will be better understood and other advantages will become apparent upon reading the detailed description of an embodiment given by way of example, a description illustrated by the accompanying drawing in which:

[0029] [Fig-1] [Fig.1] schematically represents a cross-sectional view of a cassette ra diological of the prior art;

[0030] [Fig.2] [Fig.2] schematically represents a cross-sectional view of a cassette ra diological according to the invention;

[0031] [Fig.3] [Fig.3] schematically represents a view of the digital cassette portable according to the invention without a case;

[0032] [Fig.4] [Fig.4] schematically represents an enlargement of the view of the portable digital cassette according to the invention without case presented in [Fig.3];

[0033] [Fig. 5] [Fig. 5] represents a three-dimensional part for a digital cassette portable according to the invention;

[0034] [Fig.6] [Fig.6] schematically represents a view of another embodiment of the portable digital cassette according to the invention without a case;

[0035] [Fig.7] [Fig.7] schematically represents an enlargement of the view of the portable digital cassette according to the invention without case presented in [Fig.6];

[0036] [Fig.8] [Fig.8] schematically represents the steps of a manufacturing process of the three-dimensional part according to the invention by additive manufacturing.

[0037] In these figures, for the sake of clarity, the scales are not to scale. Furthermore, the same elements will bear the same reference numerals in the different figures.

[0038] Fig. 1 schematically represents a cross-sectional view of a radiological cassette 100 of the anterior art and has already been presented in the introduction.

[0039] Figure 2 schematically represents a cross-sectional view of a radiological cassette 10 according to the invention. The portable radiological cassette 10 comprises a digital ionizing radiation detector 11 in the form of a flat panel. The cassette 10 comprises a one-piece base 12 comprising a first main face 13, a second main face 14, opposite the first main face 13, and the base 12 being delimited by four lateral faces 15, 16, 17, 18 (face 16 is the rear lateral face not visible on this cross-sectional view and face 18 is the front lateral face not visible on this cross-sectional view), the base 12 supporting the digital detector 11 on the first main face 13. The base extends along a plane (XY). The digital detector is therefore superimposed along the Z-axis perpendicular to the (XY) plane on the base 12. The cassette 10 further includes at least one electronic board 19 ensuring the management of the digital detector 11. The electronic board 19 is generally positioned on the second main face 14 of the base, but it can also be positioned on the first main face 13 or at another location on the cassette 10. Finally, the cassette 10 includes a mechanical protection housing 20, in which the base 12, the digital detector 11 and the electronic board 19 are arranged.The housing 20 has four lateral faces 25, 26, 27, 28 (face 26 is the rear lateral face not visible in this cross-sectional view and face 28 is the front lateral face not visible in this cross-sectional view), a top face 23 and a bottom face 24. According to the invention, the portable radiological cassette 10 comprises at least one three-dimensional part 30 (hereafter, we consider, by way of example and without limitation, several three-dimensional parts), each of the three-dimensional parts 30 being associated with one of the four lateral faces 15, 16, 17, 18 of the base 12. Each three-dimensional part 30 comprises a lower part 31 connected to the base 12 and at least partially enveloping the lateral face 15, 16, 17, 18 of the base 12 to which the three-dimensional part 30 is associated.As detailed below, the lower part 31 connected to the base 12 can at least partially enclose at least one lateral face of the base 12 to which the three-dimensional part 30 is associated. It can, for example, enclose two. And each three-dimensional part 30 comprises an upper part 32 extending from the first main face 13 of the base 12 to the upper face 23 of the housing 20.

[0040] Three-dimensional parts can be considered as three-dimensional shock absorbers in the three dimensions X, Y, Z.

[0041] The three-dimensional parts 30 can be made of elastomer, polyurethane, thermoplastic elastomer, polyamide and / or polyester or any other material having similar mechanical characteristics.

[0042] The three-dimensional parts ensure the load transfer between the panel (assembly formed by the base 12 and the digital detector 11) and the housing 20 in three directions. The three-dimensional parts filter the accelerations transmitted to the X-ray imaging technology (panel) during detector drops.

[0043] The three-dimensional parts are designed such that the height adjustment along the Z-axis is achieved between the modules. This prevents the transmission of external vibrations to the modules. This filters the transmission of vibrations to the modules and allows a significant reduction in so-called "microphonic" defects.

[0044] Furthermore, the properties of the material used, preferably but not limited to elastomer, also make it possible to limit internal play between the panel and the housing. This results in a limitation of internal movements that could cause defects during product use (in particular electrical disconnections, abrasion).

[0045] Thanks to the three-dimensional parts, the positioning of the detection elements relative to the external marking is guaranteed more precisely.

[0046] The material options available for these parts allow us to consider injection molding processes, thus enabling the production of these parts at low cost. Other manufacturing processes, such as additive manufacturing, are also possible, as discussed below.

[0047] The three-dimensional parts play a role in aligning the base with the housing, both in the XY plane and along the Z height. A single part provides shock isolation along all three axes: X, Y, and Z. The resulting advantages include high mechanical robustness despite cassette drops, vibrations during image acquisition, and rough handling by the user. The three-dimensional parts ensure protection against occasional or repeated mechanical stresses that could irreversibly damage the product or impair its performance when used in a noisy environment. Furthermore, the three-dimensional parts do not significantly increase the detector's cost.

[0048] The internal active part of digital detectors consists of fragile components that may break if the cassette is dropped or subjected to a violent impact. The active core of the cassette (panel + electronic boards) can undergo significant deformation under the effect of shock waves created by a drop or a violent lateral impact on the outer casing.

[0049] A flexible or elastic support must nevertheless ensure the positioning of the sensitive image area relative to the external mechanical reference of the product.

[0050] These flat-panel digital detectors are also sensitive to mechanical disturbances from the external environment (shocks, vibrations) during normal use. While not destructive to the product, these mechanical disturbances can create artifacts visible in radiological images, most often in the form of lines of varying darkness that appear in the images and significantly degrade their quality.

[0051] The invention therefore makes it possible to avoid breaking the internal active part in the event of the product falling (the drop heights being typically from 80 cm to 120 cm), and to avoid the disturbances induced in the images.

[0052] In one embodiment (visible on the right-hand side of [Fig. 2]), the in The lower portion 31, connected to the base 12, extends from the second main face 14 of the base 12 to the first main face 13 of the base and is in contact with the opposite lateral face of the housing 20. In this embodiment, the lower portion 31 clamps a portion of the base 12.

[0053] In another embodiment (visible on the left side of [Fig. 2]), the lower portion 31 connected to the base 12 extends from the lateral face of the base 12 to the first main face 13 of the base and is in contact with the opposite lateral face of the housing 20. In this embodiment, the lower portion 31 clamps a portion of the base 12.

[0054] The three-dimensional parts according to the invention can also take other forms, for example brackets, with a lower part connected to the base.

[0055] The lower part 31 of the three-dimensional parts 30 is preferably glued to the base 12. It can also be clipped or fixed to the base by any other suitable means of fixing.

[0056] Fig. 3 schematically represents a view of the portable digital cassette 10 according to the invention without a mechanical protection case 20.

[0057] The radiological cassette 10 can include first three-dimensional parts 30 and / or second three-dimensional parts 40. The first three-dimensional parts 30 and the second three-dimensional parts 40 comprise a lower part 31 and an upper part 32. The first three-dimensional parts 30 have their upper part 32 extending from their lower part 31 up to a certain height along the Z axis corresponding to the height under the housing, i.e. under the face 23 of the housing 20. The upper part is designed to absorb the forces along Z.

[0058] The second three-dimensional parts 40 are distinguished from the first three-dimensional parts 30 by their lower portion 4L. The portable radiographic cassette 10 generally comprises one (or more) flexible circuit 60 capable of containing an electronic component. The lower portion 41 of the three-dimensional parts 40 includes at least one recess 44 for housing the flexible circuit 60.

[0059] Figure 4 schematically represents an enlargement of the view of the portable digital cassette 10 according to the invention without the housing 20 shown in Figure 3. As can be seen in more detail, the flexible circuit 60 is positioned in the recess 44 of the lower part 4L. This positioning allows the flexible circuit to be securely held in place. In the event of a lateral impact, the lower part 41 can compress slightly to absorb the forces.

[0060] The upper part 42 of at least one of the three-dimensional parts 40 may terminate in a shape complementary to the upper face 23 of the housing 20. In other words, the upper part 42 terminates in its upper portion with a combination of recesses and / or protrusions of a shape complementary to the shape of the face 23 to fit the internal shapes of case 20.

[0061] The lower portion 41 of at least one of the three-dimensional parts 40 (just as this is also true for the lower portion 31 of a part 30) can partially wrap around a lateral face 18 adjacent to the lateral face 15 of the base 12 to which the three-dimensional part is associated. In other words, the lower portion of the three-dimensional part can wrap around a corner of the base.

[0062] Figure 5 represents a three-dimensional part 40 for a portable digital cassette 10 according to the invention. As explained previously, the three-dimensional part 40 is intended to cooperate with: - a one-piece base 12 comprising a first main face 13, a second main face 14, opposite the first main face 13, the base 12 being delimited by four lateral faces 15, 16, 17, 18, the base 12 being able to support a digital detector 11 on the first main face 13 and an electronic board, - a mechanical protection housing 20, the base 12, the digital detector 11 and the electronic card 19 being intended to be arranged in the mechanical protection housing 20, the housing 20 having four lateral faces 25, 26, 27, 28, a top face 23 and a bottom face 24.

[0063] According to the invention, the three-dimensional part 40 comprises a lower part 41 connected to the base 12 and at least partially enveloping a lateral face 15, 16, 17, 18 of the base 12; and an upper part 42 extending from the first main face 13 of the base 12 to the upper face 23 of the housing 20.

[0064] In this figure, the recess 44 in the lower part 41 of the three-dimensional parts 40 intended to house the flexible circuit 60 is highlighted.

[0065] It can be noted that the three-dimensional part can be associated with one lateral face of the base (as shown in Figures 3 and 4) or it can be associated with more than two lateral faces, for example two, as seen in [Fig. 5]. In this latter variant, the lower part 41 extends along two lateral edges of the base 12. Such a three-dimensional part, in addition to encompassing two lateral faces of the base, allows for precise positioning of the elements relative to the housing. And a single three-dimensional part is sufficient to absorb shocks in three directions (X and Y via the lower parts 41 and Z via the upper parts 42).

[0066] Advantageously, the upper part 42 of at least one of the three-dimensional parts 40 comprises at least one opening 43 along an axis substantially perpendicular to the lateral face of the base 12 to which the three-dimensional part 40 is associated. The role of this opening 43 is explained by means of the following figure.

[0067] Figure 6 schematically represents a view of another embodiment of the portable digital cassette 10 according to the invention without a case 20, in connection with the second three-dimensional parts 40. The view shown in [Fig.6] is identical to the view shown in [Fig.3]. In this view, the cassette 10 further includes a comb 50 which is intended to cooperate with a three-dimensional part 40, as detailed in [Fig.7], to ensure that the flexible circuit 60 is held in position in the recess and pressed against the lower part 41 of the three-dimensional part.

[0068] Figure 7 schematically represents an enlargement of the view of the portable digital cassette 10 according to the invention without a case 20 shown in Figure 6. As can be seen in more detail, in this embodiment, the cassette 10 comprises a comb 50 including a branch 51 extending substantially parallel to the first main face 13 of the base 12 and in contact with the lower part 41 of the three-dimensional part 40, the branch 51 being provided with at least one tooth 52 extending substantially perpendicularly to the branch 51, the at least one tooth 52 being configured to cooperate with the three-dimensional part 40 so as to immobilize the branch 51 against the flexible circuit (60).

[0069] Advantageously, at least one tooth 52 is inserted into the opening 43 of the upper part 42 of the three-dimensional part 40 and configured to prevent the comb 50 from translating in a plane substantially parallel to the base 12. The comb 50 is prevented from translating in the XY plane and, by the insertion of the teeth 52 into the openings 43, along the Z axis. The comb 50 presses the flexible circuits 60 towards the base, against the lower part of the three-dimensional part 40. The comb ensures the correct positioning of the flexible circuits 60, which must be held very precisely relative to the base. It can also be noted that the lower part 41 of the part 40 may protrude very slightly (on the order of a few tenths of a millimeter) from the flexible circuit.In other words, the lateral thickness of the lower part 41 is greater than the thickness of the flexible circuit, which may protrude from the base at the lateral face of the base. This configuration helps to maintain the flexible circuit in position even in the event of impacts: the three-dimensional part is flexible enough to compress and ensure a uniform bearing surface along its entire length.

[0070] In the foregoing, only one comb 50 has been mentioned. The invention can be applied with a single comb, but it advantageously includes several combs, as shown in [Fig. 7].

[0071] Thus, in addition to their role as three-dimensional shock absorbers, the three-dimensional part 40 allows for the integration of a comb, a retaining piece for the flexible modules / circuits, mechanically isolated from the housing. This contributes to improving the filtering of external vibrations to the flexible modules / circuits.

[0072] The invention is based on the three-dimensional part capable of absorbing shocks and vibrations in all directions X, Y, Z and thus protecting the detectors against Risk of breakage. The three-dimensional part acts as a mechanical filter between the mechanical protection housing and the active core of the detector. Its elastic structure allows the sensitive image area of ​​the digital detector to be positioned relative to the external mechanical reference.

[0073] Another advantage of the invention is that this three-dimensional part is removable, allowing for easy repair or replacement of the panel and electronic boards. Finally, this three-dimensional part contributes to the rigidity of the panel by limiting poorly controlled local curvatures during the propagation of shock waves created by a lateral impact.

[0074] The invention also relates to a computer program product, said computer program comprising computer-executable instructions which, when executed by a processor, cause the processor to command an additive manufacturing device to manufacture the three-dimensional part 30 or 40 as described above.

[0075] Figure 8 schematically represents the steps of a manufacturing process for the three-dimensional part according to the invention by additive manufacturing. The manufacturing process for the three-dimensional part 30, 40 by additive manufacturing comprises a step 501 which consists of obtaining an electronic file representing a geometry of a product in which the product is the three-dimensional part 30 or 40; and a step 502 of controlling an additive manufacturing device to manufacture, in one or more additive manufacturing steps, the product according to the geometry specified in the electronic file.

[0076] Examples according to the disclosure can be formed using an additive manufacturing process. A common example of additive manufacturing is 3D printing; however, other additive manufacturing methods are available. Rapid prototyping or rapid manufacturing are also terms that can be used to describe additive manufacturing processes. As used here, "additive manufacturing" generally refers to manufacturing processes in which successive layers of material(s) are arranged one on top of the other to "build" layer by layer, or "additively manufacture," a three-dimensional component. This is contrasted with certain subtractive manufacturing processes (such as milling or drilling), in which material is successively removed to make the part.Successive layers typically fuse together to form a monolithic component that may have a variety of integrated sub-components. In particular, the manufacturing process allows a single, complete component to be formed and include a variety of features not possible with previous manufacturing methods. The additive manufacturing processes described here enable fabrication to any suitable size and shape. various characteristics that may not have been possible using previous manufacturing processes. Additive manufacturing can create complex geometries without using any type of tooling, molds, or fixtures, and with little to no waste. Instead of machining components from solid plastic or metal billets, much of which is cut out and discarded, the only material used in additive manufacturing is what is needed to shape the part.

[0077] Appropriate additive manufacturing techniques according to this disclosure include, for example, fused deposition modeling (FDM), selective laser sintering (SLS), 3D printing such as inkjet and laserjet, stereolithography (SLA), direct selective laser sintering (DSLS), electron beam sintering (EBS), electron beam sintering (EBM), laser engineered net shaping (LENS), electron beam additive manufacturing (EBAM), laser net shape manufacturing (LNSM), direct metal deposition (DMD), digital light processing (DLP),Continuous Digital Light Processing (CDLP), Direct Selective Laser Melting (DSLM), Selective Laser Melting (SLM), Direct Metal Laser Melting (DMLM), Direct Metal Laser Sintering (DMLS), Material Jetting (MJ), NanoParticle Jetting (NPJ), Drop On Demand (DOD), Binder Jetting (BJ), Multi Jet Fusion (MJF), Laminated Object Manufacturing (LOM), and other known processes. The additive manufacturing processes described here can be used to form components using any suitable material. For example, the material can be plastic, composite, polymer, epoxy, photopolymer resin, or any other suitable material that can be in solid, liquid, or powder form.sheet, wire, or any other suitable form or combination thereof. More specifically, according to exemplary embodiments of this object, the additively manufactured components described herein may be formed in part, in whole, or in a certain combination of materials. These materials are examples of materials suitable for use in additive manufacturing processes that may be appropriate for manufacturing the examples described herein.

[0078] As stated above, the additive manufacturing process described herein allows a single component to be formed from several materials. Thus, the examples described herein can be formed from any suitable mixture of the above materials. By For example, a component may comprise several layers, segments, or parts formed using different materials, processes, and / or on different additive manufacturing machines. In this way, components can be built with different materials and material properties to meet the requirements of any particular application. Furthermore, although the components described here are entirely manufactured using additive manufacturing processes, it should be noted that in alternative embodiments, all or part of these components may be formed by molding, machining, and / or any other suitable manufacturing process. Indeed, any appropriate combination of materials and manufacturing processes can be used to form these components.Additive manufacturing processes typically produce components based on three-dimensional (3D) information, such as a three-dimensional computer model (or design file) of the component. Consequently, the examples described here include not only the products or components themselves, but also the processes for manufacturing such products or components via additive manufacturing, and the software, firmware, or hardware used to control the manufacturing of such products via additive manufacturing.

[0079] The structure of one or more parts of the product can be represented digitally in the form of a design file. A design file, or computer-aided design (CAD) file, is a configuration file that encodes one or more surface or volumetric configurations of the product's shape. In other words, a design file represents the geometric layout or shape of the product. Design files can be in any file format now known or developed later. For example, design files can be in Stereolithography or "Standard Tes-sellation Language" (.stl) format, which was created for 3D Systems' stereolithography CAD programs, or in Additive Manufacturing File (.stl) format.AMF), which is an American Society of Mechanical Engineers standard, is a format based on Extensible Markup Language (XML) designed to allow any CAD software to describe the shape and composition of any three-dimensional object to be manufactured on any additive manufacturing printer. Other examples of design file formats include AutoCAD files (.dwg), Blender files (.blend), Parasolid files (.x_t), 3D Manufacturing Format files (.3mf), Autodesk files (3ds), Collada files (.dae), and Wavefront files (.obj), although many other file formats exist. Design files can be produced using modeling software (e.g., CAD modeling) and / or by scanning the surface of a product to measure its surface configuration.

[0080] Once obtained, a design file can be converted into a set of computer-executable instructions which, when executed by a processor, cause the processor to control an additive manufacturing device to produce a product according to the geometric layout specified in the design file. The conversion can transform the design file into slices or layers that are to be formed sequentially by the additive manufacturing device. The instructions (also known as geometric code or "G-code") can be calibrated for the specific additive manufacturing device and can specify the precise location and amount of material to be formed at each stage of the manufacturing process. As discussed above, the forming can be done by deposition, sintering, or any other form of additive manufacturing process.Code or instructions can be translated between different formats, converted into a set of data signals and transmitted, received as a set of data signals and converted into code, stored, etc., as needed. Instructions can be an input to the additive manufacturing system and can originate from a part designer, an intellectual property (IP) provider, a design company, the operator or owner of the additive manufacturing system, or other sources. An additive manufacturing system can execute the instructions to manufacture the product using any of the technologies or processes described herein. Design files or computer-executable instructions can be stored in a computer-readable storage medium (transient or non-transient) (e.g., memory, storage system, etc.).) storing a code, or computer-readable instructions, representative of the product to be manufactured. As noted, the computer-readable code or instructions defining the product can be used to physically generate the object when the code or instructions are executed by an additive manufacturing system. For example, the instructions may include a precisely defined 3D model of the product and may be generated from one of the many well-known computer-aided design (CAD) software systems such as AutoCAD®, TurboCAD®, DesignCAD 3D Max, etc. Alternatively, a model or prototype of the component may be scanned to determine the component's three-dimensional information.

[0081] Consequently, by controlling an additive manufacturing device according to computer-executable instructions, the additive manufacturing device can be instructed to print one or more parts of the product. These parts can be printed in assembled or unassembled form. For example, different sections of the product can be printed separately (as a kit of unassembled parts) and then assembled. Alternatively, and preferably, the individual parts can be printed in assembled form. In light of the above, the methods of These embodiments include additive manufacturing processes. This encompasses the steps of obtaining a design file representing the product and instructing an additive manufacturing device to produce the product in an assembled or unassembled form according to the design file. The additive manufacturing device may include a processor configured to automatically convert the design file into computer-executable instructions to control the product's manufacture. In these embodiments, the design file itself can automatically trigger product production once it is fed into the additive manufacturing device. Consequently, in this embodiment, the design file itself can be considered computer-executable instructions that cause the additive manufacturing device to produce the product.Alternatively, the design file can be converted into instructions by an external computer system, with the resulting computer-executable instructions being provided to the additive manufacturing device. Given the above, the design and fabrication of the subject implementations and the operations described in this specification can be carried out using digital electronic circuits, or in software, firmware, or computer hardware, including the structures described in this specification and their structural equivalents, or combinations thereof. For example, the hardware might include processors, microprocessors, electronic circuits, electronic components, integrated circuits, and so on.Implementations of the subject described in this specification can be carried out using one or more computer programs, that is, one or more modules of computer program instructions, encoded on a computer storage medium for execution by, or to control the operation of, a data processing device. Alternatively, or in addition, the program instructions may be encoded on an artificially generated propagated signal, for example, a machine-generated electrical, optical, or electromagnetic signal to encode information to be transmitted to a suitable receiving device for execution by a data processing device. A computer storage medium may be, or be included in, a computer-readable storage device, a computer-readable storage substrate, a random-access or serial-access memory array or device, or a combination of one or more of these.Furthermore, while a computer storage medium is not a propagated signal, a computer storage medium can be a source or destination of computer program instructions encoded in an artificially generated propagated signal. The computer storage medium can also be, or be included in, one or more separate physical components or media (e.g., multiple CDs, etc.). disks or other storage devices). Although additive manufacturing technology is described here as enabling the fabrication of complex objects by building objects point by point, layer by layer, typically in a vertical direction, other manufacturing processes are possible and relevant to this topic. For example, while the description here refers to the addition of material to form successive layers, those skilled in the art will appreciate that the processes and structures described here can be implemented with any additive manufacturing technique or other manufacturing technology. Examples include injection molding or low-pressure elastomer casting.

[0082] The invention applies primarily to the production of image sensors for radiology, and more particularly to "portable" type sensors that are regularly subjected to shocks or are liable to be dropped during handling. However, those skilled in the art understand that the invention can be applied to any device comprising, instead of a digital detector, a fragile electronic element connected by folded flexible modules to another electronic element, such as displays, touchscreens or otherwise.

Claims

1. Demands Portable X-ray cassette (10) including: - A digital detector (11) of ionizing radiation in the form of a flat panel; - A one-piece base (12) comprising a first main face (13), a second main face (14), opposite the first main face (13), the base (12) being delimited by four lateral faces (15, 16, 17, 18), the base (12) supporting the digital detector (11) on the first main face (13); - an electronic card (19) ensuring the management of the digital detector (11); - a mechanical protection housing (20), in which are arranged the base (12), the digital detector (11) and the electronic board (19), the housing (20) comprising four lateral faces (25, 26, 27, 28), a top face (23) and a bottom face (24); characterized in that the portable radiological cassette (10) comprises at least one three-dimensional part (30, 40), each of the at least one three-dimensional part (30, 40) being associated with at least one of the four lateral faces (15, 16, 17, 18) of the base (12), each three-dimensional part (30, 40) comprising: - a lower part (31, 41) connected to the base (12) and at least partially enveloping at least one lateral face (15, 16, 17, 18) of the base (12) to which the three-dimensional part (30, 40) is associated; - an upper part (32, 42) extending from the first main face (13) of the base (12) to the upper face (23) of the housing (20); in that the portable radiological cassette includes a flexible circuit (60); the lower part (41) of at least one of the three-dimensional parts (40) comprising at least one recess (44) intended to house the flexible circuit (60); the upper part (42) of at least one of the three-dimensional parts (40) comprising at least one opening (43) along an axis substantially perpendicular to the lateral face of the base (12) to which the three-dimensional part (40) is associated; and in that the portable radiological cassette comprises a comb (50) comprising a branch (51) extending substantially parallel to the first principal face (13) of the base (12) and in contact with the lower part (41) of the three-dimensional part (40), the branch (51) being provided with at least one tooth (52) extending substantially perpendicular to the branch (51), the at least one tooth (52) being configured to cooperate with the three-dimensional part (40) so as to immobilize the branch (51) against the flexible circuit (60).

2. Portable radiological cassette (10) according to claim 1, wherein the lower part (31, 41) of at least one of the three-dimensional parts (30, 40) partially encloses a lateral face adjacent to the lateral face of the base (12) to which the three-dimensional part (30, 40) is associated.

3. Portable radiological cassette (10) according to claim 1 or 2, wherein at least one tooth (52) is inserted into the opening (43) of the upper part (42) of the three-dimensional part (40) and configured to block the comb (50) in translation in a plane substantially parallel to the base (12).

4. Portable radiological cassette (10) according to any one of claims 1 to 3, wherein the upper part of at least one of the three-dimensional parts terminates in a shape complementary to the upper face (23) of the case (20).

5. Portable radiological cassette (10) according to any one of claims 1 to 4, wherein at least one three-dimensional part (30, 40) is made of elastomer, polyurethane, thermoplastic elastomer, polyamide and / or polyester.

6. Portable radiological cassette (10) according to any one of claims 1 to 5, wherein the lower part (31, 41) of at least one three-dimensional part (30, 40) is glued to the base (12).

7. Three-dimensional part (30, 40) intended to cooperate with: - a one-piece base (12) comprising a first main face (13), a second main face (14), opposite the first main face (13), the base (12) being delimited by four lateral faces (15, 16, 17, 18), the base (12) being able to support a digital detector (11) on the first main face (13) and an electronic card, - a mechanical protection housing (20), the base (12), the digital detector (11) and the electronic card (19) being intended to be arranged in the mechanical protection housing (20), the housing (20) having four lateral faces (25, 26, 27, 28), a top face (23) and a bottom face (24); the three-dimensional part (30, 40) being characterized in that it comprises: - a lower part (31, 41) connected to the base (12) and at least partially wrapping a lateral face (15, 16, 17, 18) of the base (12); - an upper part (32, 42) extending from the first main face (13) of the base (12) to the upper face (23) of the housing (20), the lower part (41) comprising at least one recess (44) intended to house a flexible circuit (60);the upper part (42) comprising at least one opening (43) along an axis substantially perpendicular to a lateral face of the base (12) to which the three-dimensional part (40) is intended to be associated.;

8. Product computer program, said computer program comprising computer-executable instructions which, when executed by a processor, cause the processor to command an additive manufacturing device to manufacture the three-dimensional part according to claim 7.

9. A method for manufacturing the three-dimensional part (30, 40) according to claim 7 by additive manufacturing, the method comprising: obtaining (step 501) an electronic file representing a geometry of a product in which the product is the three-dimensional part (30, 40); and ordering (step 502) an additive manufacturing device to manufacture, in one or more additive manufacturing steps, the product according to the geometry specified in the electronic file.

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