Examination couch with lying plate support element and medical imaging system or irradiation system therefor
By designing retractable and extendable reclining board support elements on the examination bed, the deflection problem of the examination bed plate during patient transfer is solved, achieving more stable mechanical load and higher image quality.
Patent Information
- Application Number
- CN202323250669.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2022-12-30
- Filing Date
- 2023-11-29
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2033-11-29
AI Technical Summary
The existing examination beds are too heavy to cause mechanical load due to the deflection of the platen during the patient's transfer, which may cause deformation of the platen and patient safety risks, and also affect the image quality of the medical imaging system or irradiation system.
An examination bed is designed including retractable and extendable lying board support elements that extend at the maximum foot side position of the table plate to support the table plate, reduce deflection, and retract and extend in relation to the table plate position by a passive or active control unit.
By reducing deflection of the platen, the mechanical load during patient transfer and resuscitation is reduced, the stability and image quality of the examination bed is improved while achieving lower construction height and material savings.
Smart Images
Figure CN222640501U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an examination bed with a lying board supporting element and a medical imaging system or an irradiation system used therefor, wherein the lying board supporting element reduces the bending of the table top under load. Background Art
[0002] Such examination couches are usually part of medical systems, in particular imaging systems or irradiation systems. Examination couches are used to support patients during magnetic resonance tomography (MRI imaging), computed tomography (CT imaging), angiography, radiography, positron emission tomography (PET imaging) and / or irradiation. The material of the patient support device should not be visible in the imaging. On the other hand, the material should be stable enough to bear the weight of the patient.
[0003] Before and / or during the imaging method and / or irradiation, the patient can be moved via the examination couch, in particular the movable tabletop. In order to enable safe movement of the patient and to avoid deformations during the imaging and / or irradiation, it is necessary that the patient support device has sufficient mechanical stability.
[0004] In tomography applications (e.g. CT or MRT) it is important to keep the deflection of the table or couching board as low as possible. It is especially important that the vertical position of a point at the table (e.g. the point where the head is located) changes as little as possible when entering and leaving the field of view (FoV). If the vertical position at the start of the FoV deviates too much from the vertical position at the end of the FoV, e.g. streaks may appear in the CT image.
[0005] In the examination couch for radiotherapy, angiography, PET / SPECT applications and, if necessary, also for MR and CT applications, the patient is supported on a free-bearing lying board or table. This means that the corresponding lying board or table is mechanically connected to the examination couch only at the foot-side end, and the area where the patient is located is free-bearing, and there is no other mechanical support in the area. The foot side here refers to the position of the patient's feet on the table. That is, the patient's feet are supported or arranged at the foot-side end. Due to the mechanical implementation scheme, the patient load causes a certain vertical deflection of the table. In the scanning area of the corresponding examination couch, the patient must be supported in a free-bearing manner in order to achieve "constant deflection". In the longitudinal position or longitudinal direction where the patient is transferred, the table is in the maximum foot-side position above the examination couch, and "constant deflection" is not required here. In the transfer position, the free-bearing lying board has considerable disadvantages, such as the necessary spacing between the lying level module or the longitudinal guide device and the table caused by the deflection of the table, which requires a higher structure of the examination couch. At the same time, the lowest bed entry position, which is legally required to be 17 inches, is raised. Furthermore, a free-standing table has disadvantages when transferring patients, since when a load is suddenly applied (e.g. a patient falls onto the table), a maximum flexibility occurs with a maximum mechanical load on the table. In addition, there is a maximum risk of being caught between the table and the longitudinal guide or the base. In the case of resuscitation of collapsed patients, resuscitation is carried out in the maximum foot position, the so-called transfer position, in accordance with the operating instructions. During a cardiac compression massage, the load acting on the table occurs periodically downward, which causes extreme loads in the free-standing table.
[0006] In addition to examination tables for use in the field of angiography, known free-standing couches are used in a state of foot-tensioning throughout their entire range of motion. In examination tables in the field of angiography, a maximum foot-side position is provided for resuscitation, since here the tabletop can be supported on the table top structure or the horizontal modules or the longitudinal guides in the event of excessive deflections. This effect is intended to prevent mechanical damage and also prevent strong swinging of the patient to be resuscitated.
[0007] Regardless of the grammatical gender of a particular term, persons having male, female, or other gender identities are included. Utility Model Content
[0008] The utility model aims to provide an examination bed and a medical imaging system or an irradiation system which can realize a small deflection of a tabletop.
[0009] According to the utility model, the object is achieved by an examination bed and a medical imaging system or an irradiation system.
[0010] The utility model relates to an examination bed for supporting a patient, the examination bed comprising a column, a longitudinal slide seat arranged on the upper side of the column and a table plate arranged on the longitudinal slide seat, wherein the longitudinal slide seat is longitudinally movably connected to the column via at least one longitudinal guide device, wherein a retractable and extendable lying board support element is formed on the upper side of the column, and the lying board support element supports the table plate from below in an extended state.
[0011] The examination bed is used to support a patient, especially a lying patient. The examination bed comprises a column, a longitudinal slide arranged on the upper side of the column and a tabletop arranged at the longitudinal slide. The column stands on the floor and can be connected to the floor in particular. A longitudinal slide is arranged on the upper side of the column, and the longitudinal slide can be moved longitudinally along a longitudinal guide device. The longitudinal slide is connected to the column longitudinally movably via at least one longitudinal guide device. The longitudinal guide device can movably connect the longitudinal slide to the column. The tabletop is arranged and especially fastened on the longitudinal slide. A retractable and extendable reclining board support element is formed on the upper side of the column, and the reclining board support element supports the reclining board support element from below in the extended state. The reclining board support element is especially formed in the following area: the area is not covered by the longitudinal slide in the maximum foot side position of the tabletop. The reclining board support element can be formed in particular at the head side end of the longitudinal guide device or the horizontal module. The reclining board support element can support or support the tabletop in the extended state, so as to reduce or avoid the deflection of the tabletop.
[0012] The table top can be supported from below by means of a position-dependent couching plate support which is extended in the area of the table top at its maximum foot side and which is retracted into the horizontal module or the longitudinal guide after the couching plate has begun to move into the scanning area. This means in particular that in the maximum foot side position of the table top the couching plate support element is extended and can perform its function.
[0013] With regard to the image quality of the medical imaging system or the irradiation system, possible influences of the retraction or extension of the couch support on the longitudinal axis of the tabletop in the form of a slight increase in the movement forces or in the form of a small "shock" can be accepted because the retraction or extension of the couch support takes place near or in the transfer position. In this position near or in the foot-side end position of the tabletop, no imaging is performed, and said area is only used for patient movement or support.
[0014] Advantageously, when the patient is re-supported, force peaks acting on the tabletop can be blocked. Advantageously, when a collapsed patient is resuscitated in a transfer position or a maximum foot-side position, especially in a bed, a reclining board or a tabletop can be supported or braced. The pressing movement of the CPR massage is performed against the reclining board support device and not against the free tabletop. Advantageously, a more effective CPR massage can be achieved with a "rigid tabletop" or a non-flexible or only less flexible tabletop. Advantageously, a lower construction of an examination bed with a freely load-bearing tabletop can be achieved because the flexibility or deflection of the tabletop caused by the patient load is blocked. The spacing of the free end of the reclining board from the horizontal module or the longitudinal guide device can be selected to be small and limited, for example, a squeeze spacing (Quetschabstand) prescribed by law of at least 25 mm.
[0015] Advantageously, the tabletop can be designed or constructed to be less stable, since the greatest forces acting on the tabletop occur during repositioning of the patient or during CPR (resuscitation) and the tabletop is supported thereby.
[0016] Advantageously, image quality can be improved with less radiation exposure due to a less stable slab. For example, for computed tomography applications, less CFRP can be used in the slab. Advantageously, less attenuation or absorption and fewer artifacts during imaging can be achieved.
[0017] Advantageously, due to the lower forces than in the case of an examination table without a lying plate support, a more flexibly designable shape of the free-standing table top can be achieved. Advantageously, the material saving in the table top can achieve cost advantages over a free-standing table top without a support device in the transfer position.
[0018] According to one aspect of the invention, the reclining board support element can be retracted and extended in a position-dependent manner, in particular in a position-dependent manner, in relation to the position of the table top. The reclining board support element can be retracted and extended in relation to the position of the table top or the reclining board. In particular, in a position for transferring or re-supporting a patient, the reclining board support element can be in an extended state in order to counteract force peaks and reduce or avoid strong deflections.
[0019] According to one aspect of the invention, the reclining board support element is in an extended state in the area of the table top that is at maximum foot side or at maximum foot side positioning. In the maximum foot side position of the table top, the free end of the table top or reclining board can be at a certain distance above the base. For support, the reclining board support element can fill the distance in a partial area of the free area of the table top. Advantageously, deflections of the table top can be reduced or avoided.
[0020] According to one aspect of the invention, during the movement of the longitudinal slide, the couching plate support element is in a retracted state. Advantageously, resistance can be avoided by the couching plate support element during the movement of the longitudinal slide and thus of the table. The feeding of the table can be carried out in a predetermined and precise manner, in particular during the image recording or irradiation. The imaging or irradiation can advantageously remain unaffected by the couching plate support element.
[0021] According to one aspect of the utility model, the examination bed also has a passive control unit, which controls the retraction and extension of the reclining board support element in a position-dependent manner, especially in a position-dependent manner, so that the reclining board support element can be retracted and extended in a position-dependent manner.
[0022] The passive control device can be extended from a certain or predetermined position at the end of the maximum foot-side position of the tabletop or before reaching the maximum foot-side position of the tabletop. The reclining board support element can then take up a position for supporting the reclining board or the tabletop. In the described position, the load acting on the reclining board or the tabletop can be absorbed by the reclining board support element and transferred to the horizontal module or the longitudinal guide device or the base. One or more rollers can be arranged on the upper side of the reclining board support device so that in addition to the vertical support, the horizontal movement of the reclining board or the tabletop can also be accommodated. After starting to move from the maximum foot-side tabletop position, the so-called transfer position, towards the starting point of the scanning area or the inspection area or the irradiation area, the reclining board support device can be retracted so that it can be disengaged.
[0023] According to one aspect of the invention, the passive control unit is designed as a coupling unit coupled to a longitudinal axis movement device for moving the longitudinal slide along the longitudinal guide device. The control or extension and retraction of the reclining board support device can be carried out passively as a coupling to the longitudinal axis movement device of the reclining board or the tabletop movement. Advantageously, a simplified and reliable control of the reclining board support element can be achieved.
[0024] According to one aspect of the utility model, the examination bed also has an active control unit, which controls the retraction and extension of the lying board support element in a position-dependent manner, especially in a position-dependent manner, to control the position of the table. The manipulation or extension and retraction of the lying board support device can be carried out by an active adjusting element in a manner of controlling the longitudinal position of the lying board or the table. The adjusting element can be called a control unit. Advantageously, the lying board support element can be used in different ways, for example, for different image recordings or different examinations. For example, for the first recording mode, the lying board support element can be used for a larger movement area of the table than in the second mode. The lying board support element can be extended or retracted, for example, according to the patient's examination, irradiation or recording area. For example, the lying board support element can be used for examination at the foot end closer to the patient on a larger movement area. It should be noted in particular that the lying board support element is retracted in time before recording or irradiation, so that before recording or irradiation begins, the table is in a basically stable bending state when necessary.
[0025] According to one aspect of the utility model, the active control unit is constituted in a manner related to the longitudinal position of the longitudinal slide along the longitudinal guide by an active adjusting element. Advantageously, it is feasible to carry out individualized, position-dependent control of the lying board support element. The longitudinal position of the longitudinal slide can be determined, for example, by a sensor. Alternatively, a control signal, for example, a control signal for a linear motor, etc., can be used to move the longitudinal slide along the longitudinal guide to determine the position of the longitudinal slide and thus the table. Based on the position of the table and, if necessary, based on other parameters such as imaging mode or examination area, the lying board support element can be retracted or extended. The lying board support element can be retracted or extended at a specific position, for example, based on the patient's weight or based on the deflection of the table. In the case of a heavy patient, the lying board support element can be used, for example, for a larger movement area. For example, a switch or similar operating element can be provided, so that, for example, in an emergency situation regarding the patient's health status or the danger of squeezing in the gap between the table and the base or the longitudinal guide, the lying board support element is manually retracted or extended.
[0026] According to one aspect of the invention, the reclining board support element has at least one rolling element on the upper side. The rolling element makes it possible to use the reclining board support element in a simplified manner during the movement of the longitudinal slide and thus during the movement of the table top. The table top can slide over the rolling element. Advantageously, by means of the frictional resistance when the table top is moved, sudden movements of the table top can be reduced or avoided.
[0027] According to one aspect of the utility model, the lying board support element maintains the spacing between the table top and the upright column or the longitudinal guide device. Advantageously, the bending or deformation of the table top can be reduced or avoided.
[0028] According to one aspect of the invention, the spacing corresponds substantially to the height of the longitudinal slide. Advantageously, the tabletop can form a flat and horizontal plane. Advantageously, the flat and horizontal plane is stable and can absorb weight changes or force changes acting on the tabletop, or in particular substantially maintain the shape of the tabletop.
[0029] According to one aspect of the utility model, the lying board support element is formed substantially along the entire width of the tabletop. The tabletop can have a length extending along the longitudinal axis of the tabletop and oriented parallel to the longitudinal guide device. The tabletop can have a width extending perpendicularly to the length of the tabletop in the plane of the tabletop. The width of the tabletop is oriented perpendicularly to the longitudinal guide device. The tabletop can have a height oriented perpendicularly to the width and length. The height can extend in particular along the surface normal of the examination room. Advantageously, the lying board support element can support the tabletop over the entire width. This can also advantageously reduce or avoid the tabletop from sagging toward the middle or bending downward at the sides.
[0030] According to one aspect of the invention, the squeeze distance between the table top and the longitudinal slide is 25 mm to 50 mm, preferably 25 mm to 30 mm. Advantageously, a particularly small squeeze distance can be achieved, since the lying plate support element can reduce the greater forces and weight effects on the table top, in particular when transferring a patient or during resuscitation.
[0031] According to one aspect of the invention, the lowest upper bed position has a height of substantially 17 inches. Advantageously, a particularly low upper bed position can be provided. The overall construction height can advantageously be reduced by a reduced spacing between the table top and the longitudinal guide or base.
[0032] According to one aspect of the utility model, the tabletop has carbon fiber reinforced plastic as material. The tabletop can especially consist of carbon fiber reinforced plastic or mostly have carbon fiber reinforced plastic. Advantageously, the tabletop affects the imaging or irradiation as little as possible. Advantageously, the tabletop has sufficient stability.
[0033] The utility model also relates to a medical imaging system or an irradiation system, wherein the medical imaging system or the irradiation system has an examination bed according to the utility model. The advantages of the examination bed according to the utility model can be correspondingly transferred to the medical imaging system or the irradiation system. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The following is a detailed description of an embodiment of the present invention based on the accompanying drawings. It is shown here:
[0035] Figure 1 A schematic diagram showing a medical imaging system or an irradiation system according to the present invention, wherein the medical imaging system or the irradiation system has an examination couch according to the present invention in a transfer position;
[0036] Figure 2 A schematic diagram showing a medical imaging system or an irradiation system according to the present invention, wherein the medical imaging system or the irradiation system has an examination couch according to the present invention in a first position;
[0037] Figure 3 A schematic diagram showing a medical imaging system or an irradiation system according to the present invention, wherein the medical imaging system or the irradiation system has an examination couch according to the present invention in a second position; and
[0038] Figure 4 A schematic diagram of a medical imaging system or an irradiation system according to the present invention is shown, wherein the medical imaging system or the irradiation system has an examination couch according to the present invention in a third position. DETAILED DESCRIPTION
[0039] Figure 1 An exemplary embodiment of a medical imaging system or irradiation system 10 according to the invention is shown, which has an examination couch 1 according to the invention in a transfer position P0 . The medical imaging system or irradiation system 10 has a recording or irradiation plane 11 .
[0040] The examination bed is configured to support a patient. The patient can be positioned on the tabletop 2 in a lying position, in particular. The examination bed 1 comprises a column 5, a longitudinal slide 3 arranged on the upper side of the column 5, and a tabletop 2 arranged at the longitudinal slide, wherein the longitudinal slide is connected to the column 5 in a longitudinally movable manner via at least one longitudinal guide device 4. A retractable and extendable reclining board support element 6 is configured on the upper side of the column 5, and the reclining board support element 6 supports the tabletop 2 from below in an extended state. The reclining board support element 6 can be retracted and extended in a position-dependent manner, in particular in a position-dependent manner, in the tabletop 2. The reclining board support element 6 is in an extended state in the region of the tabletop 2 positioned at the maximum foot side, i.e. in the transfer position P0. The reclining board support element 6 maintains a spacing 20 between the tabletop 2 and the longitudinal guide device 4. The spacing 20 substantially corresponds to the height of the longitudinal slide 3. The reclining board support element 6 is configured substantially along the entire width of the tabletop 2. The reclining board support element 6 preferably has at least one rolling element on the upper side.
[0041] The squeeze distance between the table top 2 and the longitudinal slide 3 is 25 mm to 50 mm, preferably 25 mm to 30 mm. The lowest upper bed position has a height of substantially 17 inches.
[0042] The examination bed 1 also has a passive control unit or an active control unit, which controls the retraction and extension of the reclining board support element in a position-dependent manner, in particular in a position-dependent manner, in relation to the position of the table top. The passive control unit can be designed as a coupling unit coupled to a longitudinal axis movement device, which is used to move the longitudinal slide 3 along the longitudinal guide device 4. The active control unit is designed by an active adjustment element with respect to the longitudinal position of the longitudinal slide 3 along the longitudinal guide device 4. The active adjustment element can be realized as a separate actuator.
[0043] The transfer position P0 represents the maximum foot-side position of the table top 2. The reclining board support element 6 is in the extended state. The reclining board support element 6 is active and supports the table top 2 or reclining board from below.
[0044] Figure 2 An exemplary embodiment of a medical imaging system or irradiation system 10 according to the invention is shown, which has an examination bed 1 according to the invention in a first position P1. The examination bed 2 has left the transfer position. The examination bed 2 has been slightly moved longitudinally and is in the first position P1. The movement and its direction are shown with the aid of arrows. The tabletop 2 is outside the recording or irradiation plane 11. The lying plate support element 6 is in an extended state. The lying plate support element 6 is active and supports the tabletop 2 or lying plate from below.
[0045] Figure 3 An exemplary embodiment of a medical imaging system or irradiation system 10 according to the present invention is shown, which has an examination bed 1 according to the present invention in a second position P2. The examination bed 2 has also moved slightly further longitudinally and is in the second position P2. The tabletop 2 is still outside the recording or irradiation plane 11. The reclining board support element 6 is in a retracted state. The reclining board support element 6 does not work and no longer supports the tabletop 2 or the reclining board from below. The tabletop 2 hangs freely. Thereby, recording or irradiation can be performed in a freely loaded state of the tabletop 2. The state is also referred to as "constant deflection". Now, while the longitudinal slide 3 continues to move, the reclining board support element 6 is in a retracted state.
[0046] Figure 4 An exemplary embodiment of a medical imaging system or irradiation system 10 according to the present invention is shown, which has an examination table 1 according to the present invention in a third position. The reduced distance 21 is smaller than the original distance, especially at the head-side end of the longitudinal guide 4 close to the medical imaging system or irradiation system 10. The table 2 is now in the recording or irradiation plane 11. The recording or irradiation is performed with the table 2 freely supported.
[0047] After the recording, the table top 2 can be moved back and assume the same state as it occurred on the way to the recording or irradiation plane 11, but in the opposite order. The table top 2 moves from the recording or irradiation plane 11 back to the transfer position P0. At the position P1, the lying plate support element 6 is extended again and becomes active again. The table top 2 is supported in the vertical direction, providing the particularly necessary gap between the table top 2 and the longitudinal guide device 4. When re-supporting the patient or in the case of resuscitation, the table top 2 is supported from below and force peaks are prevented. The position-dependent lying plate support element 6 enables a lower construction of the examination bed 1 in the area of the table top 2 and the longitudinal guide device 4, thereby achieving a low bed height.
[0048] Although the details of the present invention have been described in detail through preferred embodiments, the present invention is not limited to the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the protection scope of the present invention.
Claims
1. An examination bed (1) having a lying plate support element, the examination bed being used to support a patient, characterized in that: The examination bed (1) comprises a column (5), a longitudinal slide (3) arranged on the upper side of the column and a tabletop (2) arranged on the longitudinal slide, wherein the longitudinal slide is longitudinally movably connected to the column via at least one longitudinal guide device (4), wherein a retractable and extendable reclining board support element (6) is formed on the upper side of the column, and the reclining board support element (6) supports the tabletop from below in an extended state.
2. The examination bed with a lying plate support element according to claim 1, characterized in that: The reclining board support element can be retracted and extended in a position-dependent manner.
3. The examination bed with a lying plate support element according to claim 1 or 2, characterized in that: The reclining board support element is in the extended state in the region of the tabletop which is positioned at the maximum foot side, ie in the transfer position (P0).
4. The examination bed with a lying plate support element according to claim 1 or 2, characterized in that: During the movement of the longitudinal slide from a second position (P2) of the table (2) away from the maximum foot-side position, the lying board support element is in a retracted state, in which second position the table (2) extends into the medical imaging system or irradiation system (10) and is outside the recording or irradiation plane (11).
5. The examination bed with a lying plate support element according to claim 1 or 2, characterized in that: The examination couch also has a passive control unit which controls the retraction and extension of the couch support elements in a position-dependent manner.
6. The examination bed with a lying board support element according to claim 5, characterized in that: The passive control unit is designed as a coupling unit which is coupled to a longitudinal axis movement device for moving the longitudinal slide along the longitudinal guide.
7. The examination bed with a lying board support element according to claim 1 or 2, characterized in that: The examination couch also has an active control unit which controls the retraction and extension of the couch support elements in a position-dependent manner.
8. The examination bed with a lying plate support element according to claim 7, characterized in that: The active control unit is designed to be dependent on the longitudinal position of the longitudinal slide along the longitudinal guide via active adjusting elements.
9. The examination bed with a lying board support element according to claim 1 or 2, characterized in that: The reclining board supporting element has at least one rolling element on the upper side.
10. The examination bed with a lying board support element according to claim 1 or 2, characterized in that: The lying board support element maintains a spacing (20) between the tabletop and the longitudinal guide.
11. The examination bed with a lying plate support element according to claim 10, characterized in that: The spacing corresponds essentially to the height of the longitudinal slide.
12. The examination bed with a lying board support element according to claim 1 or 2, characterized in that: The lying plate support element is formed substantially along the entire width of the tabletop.
13. The examination bed with a lying plate support element according to claim 1 or 2, characterized in that: The extrusion spacing between the table and the longitudinal slide is 25 mm to 50 mm.
14. The examination bed with a lying plate support element according to claim 1 or 2, characterized in that: The lowest upper bed position has a height of substantially 17 inches.
15. The examination bed with a lying board support element according to claim 13, characterized in that: The extrusion spacing is 25 mm to 30 mm.
16. The examination bed with a lying board support element according to claim 2, characterized in that: The lying board support element can be retracted and extended in dependence on the position of the table top.
17. The examination bed with a lying board support element according to claim 5, characterized in that: The passive control unit controls the retraction and extension of the lying plate support element as a function of the position of the table top.
18. The examination bed with a lying board support element according to claim 7, characterized in that: The active control unit controls the retraction and extension of the lying plate support element as a function of the position of the table top.
19. A medical imaging system or irradiation system, characterized in that: The medical imaging system or irradiation system comprises an examination couch having a couch support element according to any one of the preceding claims.