Load-bearing simulation assembly and method for imaging an object using the load-bearing simulation assembly - Patents.com

Abstract

The load-bearing simulation assembly includes a base having a support surface, the base further including first and second sections hingedly connected to each other so as to be foldable relative to one another. A subject support portion is mounted on the first section of the support surface, and a pedal assembly is mounted on the second section of the support surface. The pedal assembly includes a contact plate spaced a predetermined distance from the subject support portion, configured to receive a compressive force from the subject, measure the compressive force, and provide an indication that the compressive force corresponds to the subject's load-bearing condition.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This application relates generally to medical imaging, and more particularly to an apparatus and method for simulating load-bearing conditions. [Background technology]

[0002] To accurately assess a subject's lower extremities (e.g., hip, knee, foot, ankle, etc.) and develop a treatment plan for the condition, it is beneficial to obtain structural measurements of the subject's lower extremities. For certain conditions (e.g., hallux valgus), it is beneficial to obtain three-dimensional structural measurements of the subject in a weight-bearing state. Existing three-dimensional medical imaging systems (e.g., computed tomography scanners and magnetic resonance imaging systems) have various limitations in creating such a weight-bearing state during imaging to obtain three-dimensional structural measurements. For example, existing bore scanners generally extend horizontally, making it impossible to utilize gravity to apply a vertical load to the subject's feet during imaging. Furthermore, existing vertical bore scanners, which allow the subject to be in a standing position during scanning, are prohibitively expensive and difficult to use, and therefore are not widely available. Summary of the Invention

[0003] In an embodiment, a load-bearing simulation assembly is disclosed. The load-bearing simulation assembly includes a base having a support surface, the base further including a first section and a second section hingedly connected to each other such that the first section and the second section are foldable relative to each other. A subject support portion is mounted on the first section of the support surface, and a pedal assembly is mounted on the second section of the support surface. The pedal assembly includes a contact plate spaced a predetermined distance from the subject support portion and configured to receive a compressive force from the subject, measure the compressive force, and provide an indication that the compressive force corresponds to the subject's load-bearing condition.

[0004] In another embodiment, a load-bearing simulation assembly is disclosed. The load-bearing simulation assembly includes a base having a mounting surface, the base further including a first section having a plurality of protrusions and a second section having a plurality of rails configured to receive the plurality of protrusions. At least one pedal assembly is movably coupled to the second section of the base, the at least one pedal assembly including a contact plate that receives a compressive force from a subject, measures the compressive force, and provides an indication that the compressive force corresponds to the subject's load-bearing condition.

[0005] In yet another embodiment, a method for capturing images of a subject using a load-bearing simulation assembly is disclosed, the method including the steps of positioning a subject on a subject support portion of the load-bearing simulation assembly, adjusting the load-bearing simulation assembly based on the subject and imaging requirements, securing the subject relative to the load-bearing simulation assembly, positioning the load-bearing simulation assembly for imaging, instructing the subject to apply forces to pedal assemblies disposed on the load-bearing simulation assembly, and capturing images of the subject's extremities. [Brief explanation of the drawings]

[0006] The illustrated embodiments are illustrative and exemplary in nature and are not intended to limit the subject matter defined by the claims. The following detailed description of exemplary embodiments can be understood when read in conjunction with the accompanying drawings, in which like structure is designated with like reference numerals and in which:

[0007] [Figure 1A] 1 illustrates a perspective view of a subject imaging assembly according to one or more embodiments described herein. [Figure 1B] 1B illustrates another perspective view of the subject imaging assembly shown in FIG. 1A according to one or more embodiments described herein. [Figure 2] 1B illustrates a perspective view of another embodiment of the subject imaging assembly shown in FIG. 1A according to one or more embodiments described herein. [Figure 3A] 1 shows a perspective view of another embodiment of a subject imaging assembly including a subject support according to one or more embodiments described herein. [Figure 3B] 1 shows a perspective view of another embodiment of a subject imaging assembly including a pair of brackets according to one or more embodiments shown and described herein. [Figure 3C] FIG. 4 shows a partial front view of the subject imaging assembly of FIGS. 3A and 3B including a pedal assembly according to one or more embodiments shown and described herein. [Figure 4A] FIG. 4 shows a partial perspective view of the subject imaging assembly of FIGS. 3A and 3B including a pedal assembly according to one or more embodiments shown and described herein. [Figure 4B] FIG. 4 shows a partial perspective view of the subject imaging assembly of FIGS. 3A and 3B including a pedal assembly according to one or more embodiments shown and described herein. [Figure 4C] FIG. 4 shows a partial perspective view of the subject imaging assembly of FIGS. 3A and 3B including a pedal assembly according to one or more embodiments shown and described herein. [Figure 4D] FIG. 4 shows a partial perspective view of the subject imaging assembly of FIGS. 3A and 3B including a pedal assembly according to one or more embodiments shown and described herein. [Figure 5] 1 shows a partial perspective view of another embodiment of a subject imaging assembly according to one or more embodiments shown and described herein. [Figure 6] 1 illustrates a perspective view of a pedal assembly according to one or more embodiments described herein. [Figure 7A] 7 illustrates a perspective view of the pedal assembly of FIG. 6 according to one or more embodiments described herein. [Figure 7B]7 illustrates a partial cross-sectional view of the pedal assembly of FIG. 6 according to one or more embodiments described herein. [Figure 7C] 7 illustrates a partial top perspective view of the pedal assembly of FIG. 6 according to one or more embodiments shown and described herein. [Figure 8] FIG. 1 is a flow diagram illustrating a method for capturing images of a subject using a load-bearing simulation assembly according to one or more embodiments described herein. DETAILED DESCRIPTION OF THE INVENTION

[0008] Embodiments of a load-bearing simulation assembly for imaging a subject's lower extremity (e.g., foot, ankle, leg, knee, hip, etc.) and a method for imaging a subject using the load-bearing simulation assembly will now be described in detail. The load-bearing simulation assembly may include a base on which a subject support and a pedal assembly are mounted. In embodiments, the base of the load-bearing simulation assembly is mounted on a support platform of a subject imaging assembly. The subject imaging assembly may include an imaging system, such as a computed tomography (CT) scanner or a magnetic resonance imaging (MRI) system. The relative positioning of the load-bearing simulation assembly and the imaging system may be adjustable (e.g., via an actuator on the support platform) so that the pedal assembly can be moved into the field of view of the imaging system. In embodiments, the pedal assembly includes a spring assembly including a contact plate facing the subject support and a compression plate separated by at least one spring member.

[0009] In one aspect of the present disclosure, a subject applies a compressive force to the pedal assembly to place it in an imaging position. In response to the subject applying a compressive force to compress a spring member, the contact plate moves in a compressive direction until the contact plate contacts a travel limiter of a spring assembly disposed between the contact plate and the compression plate. When the contact plate contacts the travel limiter, the contact plate is positioned at a predetermined imaging distance from the compression plate. The spring member applies a resistive force to the subject to measure the force provided by the subject. In embodiments, the travel limiter is adjustable to vary the imaging distance and the resistive force provided by the at least one spring member in the presence of a compressive force applied by the subject. In embodiments, the resistive force provided by the spring member can be individually adjusted for each subject to simulate a load-bearing condition for the subject when capturing images of the subject's lower extremities. Advantageously, the travel limiter provides a visual indication of whether the subject is applying sufficient compressive force to simulate a load-bearing condition. Additionally, the travel limiters are distributed to ensure that the subject distributes the compressive force appropriately across the subject's foot, thereby preventing the subject from applying too much force in one area of ​​the foot (e.g., the heel) and too little force in another (e.g., the forefoot).

[0010] The load-bearing simulation assemblies described herein are adaptable to a variety of different imaging positions. For example, the pedal assemblies described herein include a pedal support assembly that supports a spring assembly and an adjustable support element that connects the pedal support assembly to a base of the load-bearing simulation assembly. The adjustable support element may include multiple support positions for supporting the pedal support assembly in various orientations. In embodiments, selecting from these different orientations changes the relative angle between the compression direction of the spring assembly and the axis of the imaging system to change the angle of the subject's foot included in the captured images. The multiple support positions of the adjustable support element facilitate capturing images of the subject's ankle, forefoot, and hindfoot using predetermined loads applied to each of these regions.

[0011] Additionally, the subject support section can be configured for a number of different imaging situations. For example, in embodiments, the subject support section is rotatably coupled to the base such that the subject support section can rotate about a first axis of rotation generally parallel to a surface normal of the base to facilitate positioning the subject on the load-bearing simulation assembly. In embodiments, the subject support section is also rotatable about a second axis of rotation generally perpendicular to the first axis of rotation to facilitate tilting the positioned patient relative to the imaging system so that the imaging system can be tilted at various angles, thereby providing additional imaging flexibility. Additionally, the subject support section can also be attached to the base via a moving support mechanism that facilitates adjusting the distance between the pedal assembly and the subject support section to accommodate subjects with different leg lengths. In this manner, the load-bearing simulation assemblies described herein facilitate capturing a number of different load-bearing images of a subject's lower extremities that can be tailored specifically to the subject, thereby facilitating the capture of complete three-dimensional images for the diagnosis and treatment of various conditions.

[0012] Beneficially, the load-bearing simulation assemblies described herein require the subject to apply a compressive force to the pedal assembly using a particular foot (e.g., a foot that is causing discomfort to the subject). By providing an indication that the subject is applying a desired amount of compressive force (e.g., a contact plate contacting a travel limiter), the load-bearing simulation assemblies described herein prevent the subject from off-loading the particular foot to ensure that the particular foot is in the proper loading condition. Such loading conditions advantageously facilitate accurate imaging of the subject's foot components as they function. Furthermore, compatibility with existing load-bearing CT scanners enables functional three-dimensional imaging of the subject's foot to diagnose the subject's foot condition at a relatively low cost compared to existing load-bearing CT scanners. Additionally, because the load-bearing simulation assemblies described herein facilitate load-bearing imaging using three-dimensional modalities (e.g., CT scans, MRIs, etc.), the approach described herein is advantageous over existing load-bearing X-ray imaging techniques.

[0013] 1A-1B, a subject imaging assembly 100 will now be described. Subject imaging assembly 100 is shown as including a support platform 102 and a load-bearing simulation assembly 112 having a base 114. In embodiments, support platform 102 may be derived from an existing medical imaging system, such as a computed tomography (CT) scanner or a magnetic resonance imaging (MRI) system. For example, in embodiments, support platform 102 may comprise the tabletop of an existing CT scanner with the couch removed to provide a surface for mounting load-bearing simulation assembly 112.

[0014] In other embodiments, the support platform 102 may include a plurality of openings, such as holes, that may allow the support platform 102 to be positioned on the surface of any manufacturer's machine (e.g., CT scanner, MRI machine, etc.). In these embodiments, the shape of the support platform 102 and / or the plurality of openings may be adapted to the surface shape of a particular manufacturer's device. For example, the shape of the support platform 102 and the plurality of openings may be adapted to either a CT machine or an MRI machine manufactured by a particular provider. In yet other embodiments, the support platform 102 may include a plurality of openings that fit multiple devices (e.g., CT scanner, MRI machine, etc.) such that the support platform 102 may be used with a variety of devices.

[0015] Similarly, the load simulation assembly 112 is adaptable to any available imaging system. Thus, the dimensions of the base 114 and any mechanism incorporated into the load simulation assembly 112 for attaching the base 114 to the support platform 102 may vary depending on the subject imaging system into which the load simulation assembly 112 is incorporated.

[0016] The support platform 102 and base 114 of the load simulation assembly 112 both extend in a first direction (e.g., the x-direction of the coordinate axes shown in FIGS. 1A-1B). In embodiments, the support platform 102 as a whole (e.g., a tabletop) is movable in the first direction (e.g., toward and / or into an aperture of the imaging system) such that the combination of a portion of the support platform 102 and the load simulation assembly 112 can move in the first direction. It should also be understood that some embodiments may not include the support platform 102. For example, in such embodiments, the load simulation assembly 112 may be mounted on a support (e.g., a cart).

[0017] 1A , load simulation assembly 112 includes a base 114 having a mounting surface 116, a subject support 118 mounted on mounting surface 116, and a pedal assembly 122 mounted on mounting surface 116. Subject support 118 is separated from pedal assembly 122 by a distance 124 in a first direction. In an embodiment, base 114 is constructed of a material (e.g., carbon fiber) that does not interfere with the imaging performance of the device on which subject imaging assembly 100 is mounted. For example, if load simulation assembly 112 is compatible with MRI, base 114 may be implemented with any material that is not ferromagnetic. Conversely, in an embodiment in which load simulation assembly 112 is compatible with a CT scanner, base 114 may be made of a radiopaque or similar material.

[0018] As described herein, the base 114 can have any size, shape, and configuration based on the specifications of the imaging system into which the assembly will be incorporated. For example, the base 114 can be flat, curved, or any other shape required for connecting the base 114 to a particular manufacturer's equipment. In some embodiments, the base 114 can include additional surface features (e.g., ridges, edges, grooves, etc.) to further facilitate the base's connection to a particular manufacturer's equipment.

[0019] 1A and 1B, support platform 102 and base 114 of load-bearing simulation assembly 112 may be foldable to increase portability of subject imaging assembly 100. In these embodiments, support platform 102 may include first section 102 a and second section 102 b that may be foldably coupled to one another. In these embodiments, first section 102 a and second section 102 b may be moved from a folded position (e.g., a position in which first section 102 a and second section 102 b are folded together) to an imaging position (e.g., a position in which first section 102 a and second section 102 b each extend in a first direction).

[0020] For example, the first section 102 a and the second section 102 b may be formed as separate pieces connected via a hinge or other similar mechanism such that the first section 102 a and the second section 102 b are foldable relative to one another. When the support platform 102 is not actively being used for imaging purposes, the first section 102 a and the second section 102 b may be moved to a folded position to facilitate transportation and / or storage of the support platform 102. In these embodiments, the hinge or other similar mechanism may further include a locking mechanism that may maintain the first section 102 a and the second section 102 b in the imaging position when the support platform is in use.

[0021] 1A and 1B, the base 114 may further include a first section 114a and a second section 114b that may be foldably coupled to one another. In these embodiments, the first section 114a and the second section 114b may be movable from a folded position (e.g., a position in which the first section 114a and the second section 114b are folded together) to an imaging position (e.g., a position in which the first section 114a and the second section 114b each extend in a first direction).

[0022] For example, first section 114a and second section 114b may be formed as separate pieces connected via a hinge or other similar mechanism such that first section 114a and second section 114b are foldable relative to one another. When base 114 is not actively being used for imaging purposes, first section 114a and second section 114b may be moved to a folded position to facilitate transportation and / or storage of base 114. In these embodiments, the hinge or other similar mechanism may further include a locking mechanism that may maintain first section 114a and second section 114b in the imaging position when the support platform is in use.

[0023] It should be understood that in embodiments in which both the support platform 102 and the base 114 are foldable components, a single hinge or other similar mechanism may be used to move the support platform 102 and the base 114 from the folded position to the imaging position. In these embodiments, both the support platform 102 and the base 114 may be foldable without the need to remove the base 114 from the support platform 102.

[0024] 1A and 1B, in embodiments, subject support portion 118 is coupled to supporting surface 116 via hinge 120 such that subject support portion 118 is foldable relative to supporting surface 116 of load-bearing simulation assembly 112. In these embodiments, subject support portion 118 may be movable between an upright position (e.g., a position in which subject support portion 118 extends perpendicularly from supporting surface 116, as shown in FIG. 1A) and a folded position (e.g., a position in which subject support portion 118 is flush with supporting surface 116, as shown in FIG. 1B).

[0025] 1A-1B, subject support section 118 may include first support element 118a and second support element 118b, with second support element 118b hingedly connected to first support element 118a. In the upright position, as shown in FIG. 1A, first support element 118a is connected to hinge 120, which in turn is connected to supporting surface 116. In this position, second support element 118b may extend between first support element 118a and stopper 121, which is rigidly secured to supporting surface 116. In these embodiments, the placement of second support element 118b between first support element 118a and stopper 121 may act to secure subject support section 118 in the upright position.

[0026] 1B , the subject support portion 118 may be actuated from an upright position to a folded position by pulling (e.g., manually or otherwise) the first support element 118a toward the supporting surface 116. In these embodiments, the first support element 118a may rotate about the hinge 120 such that the first support element 118a folds downward toward the supporting surface 116. While the first support element 118a rotates about the hinge 120, the second support element 118b may slide longitudinally away from the stopper 121. The first support element 118a continues to rotate about the hinge 120 until the first support element 118a is flush with the supporting surface 116, at which point the second support element 118b may likewise be flush with the top surface of the first support element 118a. It should be appreciated that by moving the subject support to the collapsed position, the portability and / or storage of the base 114 may be improved.

[0027] 1A and 1B, the load-bearing simulation assembly 112 may further include a pedal assembly 122 that may be positioned on the support surface 116 of the base 114 such that a distance 124 between the pedal assembly 122 and the subject support portion 118 is adjustable to accommodate different subjects. In these embodiments, the support surface 116 may further include a movement support mechanism 134 to which the pedal assembly 122 is coupled such that the pedal assembly 122 is longitudinally movable along the length of the support surface 116.

[0028] In these embodiments, the motion support mechanism 134 may include one or more tracks (e.g., a pair of tracks) that abut a corresponding pedal assembly 122. In embodiments, fasteners (not shown) connecting the pedal assembly 122 to the motion support mechanism 134 may be loosened, allowing the distance 124 to be manually adjusted for a particular subject. Alternative motion support mechanisms 134 are also envisioned. In embodiments, the motion support mechanism 134 includes an actuator (e.g., a motion stage) connecting the pedal assembly 122 to the mounting surface 116 such that the distance 124 may be electronically adjusted. In embodiments, the motion support mechanism 134 rests on a mounting platform (not shown) attached to the base 114. The mounting platform may be movable (e.g., via a telescoping arm, etc.) in a second direction (e.g., the z-axis direction shown in FIG. 1C ) that is generally perpendicular to the first direction.

[0029] In an embodiment, the pedal assembly 122 may be coupled to the movement support mechanism 134 via a tilting mechanism such that the pedal assembly 122 is tiltable relative to the support surface 116 of the support platform 102. By adjusting the angle between the pedal assembly 122 and the support surface 116, the subject's feet may be more easily applied to the pedal assembly 122 when positioned at a certain angle relative to the surface normal 115 (see FIG. 1A ) of the support surface 116.

[0030] In embodiments, the distance between pedal assembly 122 and subject support portion 118 is adjusted to a particular angle depending on the relative angle at which the subject's foot extends with respect to surface normal 115. For example, in embodiments, pedal assembly 122 may be adjusted so that the subject's foot may extend at an angle of 0 degrees, 15 degrees, 30 degrees, 45 degrees, and / or 60 degrees with respect to surface normal 115. Surface normal 115 may be aligned with the imaging axis of the imaging system so that varying the angle of the subject's foot facilitates imaging different cross-sections of the foot. In embodiments, a user of subject imaging assembly 100 may also be instructed to adjust the distance between subject support portion 118 and pedal assembly 122 based on a color-coding scheme or the like and the relative angle of the foot.

[0031] 1A-1B, it should be understood that pedal assembly 122 may further be removably coupled to motion support mechanism 134 such that pedal assembly 122 may be removed from mounting surface 116 of load-bearing simulation assembly 112. In these embodiments, the detachability of pedal assembly 122 from the mounting surface may allow base 114 and support platform 102 to be movable to a folded position, as described herein, so that subject imaging assembly 100 may be easily stored and transported.

[0032] Furthermore, removably coupling pedal assembly 122 to mobile support mechanism 134 allows pedal assembly 122 to be replaced with another pedal that may be more suitable for a particular imaging application. For example, a particular pedal assembly 122 may conform to a particular anatomical feature or may be made with a certain material (e.g., a contrast agent, etc.) that is desirable for a particular imaging procedure. Furthermore, different pedal assemblies 122 may be desirable for different imaging procedures (e.g., CT scan, MRI, etc.). Because pedal assembly 122 is detachable from mobile support platform 102, multiple pedal assemblies 122 may also be used interchangeably without having to utilize a new subject imaging assembly 100 for a different imaging procedure.

[0033] 2, it should be understood that in some embodiments, the dimensions of support platform 102 and base 114 may vary to accommodate subjects of different sizes and / or different imaging positions. For example, as shown in FIGS. 1A and 1B, if imaging is to be performed on the subject's foot and / or ankle, the subject may be positioned in a seated (e.g., sitting or other) position between subject support 118 and pedal assembly 122. However, to accurately image different parts of the subject, such as the joints and / or hips, the subject may need to be positioned in different positions on base 114.

[0034] The first section 114a of the base 114 may further include a cavity 104 to accommodate a subject in a horizontal position (e.g., prone or supine). In these embodiments, when the subject support portion 118 is moved to a folded position, the subject support portion 118 folds into the cavity 104 formed in the first section 114a of the base 114, as described herein with reference to FIG. 1B. When the subject support portion 118 is in the folded position, the first support element 118a may be flush with the first section 114a of the base 114 so that a subject may lie or sit on the base 114 in a seated position without interference from the subject support portion 118. Although FIG. 2 shows the subject support 118 as being foldable within the cavity 104, in some embodiments, the subject support 118 may be removed from the first section 114a of the base 114 prior to performing imaging that requires the subject to be in a horizontal position (e.g., lying on its side or otherwise).

[0035] 2 , in these embodiments, support platform 102 may further include a third section 102c, and base 114 may further have a third section 114c that may be used to extend the length of support platform 102 and base 114, respectively, to allow the subject to lie or sit on subject imaging assembly 100. For example, third section 102c may be formed as a separate, hinged extension, or other similar mechanism, that allows third section 102c to be foldable relative to first section 102a and / or second section 102b. In other embodiments, third section 102c may be integrally formed with first section 102a such that first section 102a and third section 102c are foldable together relative to second section 102b.

[0036] 2 , the third section 114c of the base 114 may be formed as a separate piece connected to the first section 114a via a hinge or other similar mechanism such that the third section 114c is foldable relative to the first section 114a. As further shown in FIG. 2 , a pair of brackets 126, such as shoulder brackets or shoulder pads, may be connected to the third section 114c of the base 114, and a support 128, such as a head and / or neck support, may be connected to the third section 102c of the support platform 102. In these embodiments, a subject may lie or sit on the load-bearing simulation assembly 112 such that the subject engages both the pair of brackets 126 and the pedal assembly 122. Thus, when imaging knee joints, hips, and other similar areas, the force acting between the pedal assembly 122 and the pair of brackets 126 may be used for imaging purposes.

[0037] As further shown in FIG. 2 , pedal assembly 122 may include multiple pedal assemblies, such as first pedal assembly 122 a and second pedal assembly 122 b. For example, in some embodiments, it may be necessary to simultaneously simulate forces on each limb of a subject to achieve desired imaging. In these embodiments, subject imaging assembly 100 may include first pedal assembly 122 a and second pedal assembly 122 b so that the subject can exert forces on subject imaging assembly 100 using both lower limbs to simulate a weight-bearing condition for the subject. Operation of pedal assembly 122 is described in further detail herein with reference to FIG. 6 .

[0038] 3A-3C, another embodiment of subject imaging assembly 100' will be described. It should be understood that subject imaging assembly 100' is similar to subject imaging assembly 100 described herein. As such, like structures are indicated using like reference numerals.

[0039] 3A and 3B, base 114 of subject imaging assembly 100 may include first section 114a and second section 114b, which may be formed as separate components. In these embodiments, first section 114a may include multiple protrusions 106 extending longitudinally from first section 114a (e.g., in the positive x-axis direction shown on the coordinate axes of FIGS. 3A-3C).

[0040] The second section 114b of the base 114 may include a plurality of rails 108 configured to receive the plurality of protrusions 106 extending from the first section 114a of the base 114 to couple the first section 114a of the base 114 to the second section 114b of the base 114. In these embodiments, the plurality of rails 108 may be dovetail-shaped, square and / or rectangular, triangular, circular, or any other similar shape corresponding to the shape of the plurality of protrusions 106.

[0041] In these embodiments, the first section 114a of the base 114 may further include various hardware utilized in performing load-bearing simulations on various limbs of the subject. For example, as shown in FIG. 3A , the first section 114a of the base 114 may include a subject support 118 that allows the subject to be seated in a seated position on the load-bearing simulation assembly 112. Conversely, as shown in FIG. 3B , the first section 114a of the base 114 may include a pair of brackets 126 and a support 128 that may be used to simulate a load-bearing condition on the subject when the subject is in a horizontal position, as described herein with reference to FIG. 2 . Thus, in the embodiments described herein, a user may select which first section 114a of the base 114 to use in performing a load-bearing simulation based on the size of the subject and / or the location where the subject will be positioned.

[0042] 3A and 3B, the first section 114a of the base 114 may include a first protrusion 106a and a second protrusion 106b, while the second section 114b of the base 114 may include a first rail 108a, a second rail 108b, and a third rail 108c that passes through the center of the second section 114b. In these embodiments, to couple the first section 114a of the base 114 to the second section 114b of the support platform, a user may slide the first protrusion 106a along the first rail 108a and the second protrusion 106b along the second rail 108b. As discussed herein, the first section 114a may be selected based on the dimensions of the subject and the load-bearing simulation to be performed. For example, first section 114a including subject support 118 may be used to position a subject in a seated position to aid in simulating loading at the foot or ankle. However, to simulate loading at the hip or knee, it may be necessary to remove first section 114a with subject support 118 and replace it with first section 114a having a pair of brackets 126 and support 128.

[0043] It should be further understood that, although not shown, in the embodiments described herein, first section 114a may include each of subject support portion 118, pair of brackets 126, and support portion 128. In these embodiments, subject support portion 118 may be foldable within the support platform (as described herein with reference to FIG. 2) so that the subject may be positioned in either a seated or horizontal position in a seated posture on base 114 without having to remove first section 114a of base 114.

[0044] Furthermore, while first section 114a has been described as being coupled to second section 114b of base 114 via protrusions 106 and rails 108, respectively, it should be understood that in some embodiments, base 114 may include other and / or alternative mechanisms for coupling first section 114a to second section 114b. For example, in the embodiments described herein, first section 114a or second section 114b may include a plurality of female ports on an underside thereof that may be configured to receive male fittings used to removably attach first section 114a to second section 114b. Additionally, in some embodiments, second section 114b may include a plurality of cavities extending into and / or through second section 114b of base 114. In these embodiments, the plurality of protrusions 106 of the first section 114 a may be received within a plurality of cavities formed within the second section 114 b of the base 114 .

[0045] 3C-4D, the plurality of rails 108 formed on the second section 114b of the base 114 may further be utilized to adjustably couple pedal assemblies 122 to the base 114. In these embodiments, each pedal assembly 122 disposed on the base 114 may include at least one foot 130 configured to be received by at least one of the plurality of rails 108 formed on the second section 114b of the base 114.

[0046] 3C, subject imaging assembly 100' may include first pedal assembly 122a having first foot 130a and second foot 130b, and second pedal assembly 122b having third foot 130c and fourth foot 130d. In these embodiments, the feet of each of pedal assemblies 122a, 122b are shaped such that feet 130a, 130b, 130c, 130d are received by a plurality of rails 108. 3C, the first foot 130a of the first pedal assembly 122a may be received by the first rail 108a, the second foot 130b of the first pedal assembly 122a and the third foot 130c of the second pedal assembly 122b may each be received by the third rail 108c, and the fourth foot 130d of the second pedal assembly 122b may be received by the second rail 108b. In these embodiments, the first and / or second pedal assemblies 122 may be movable (e.g., longitudinally) along the rails 108 such that the distance 124 between the subject and the pedal assemblies 122a, 122b may be adjusted, as described herein with reference to FIGS.

[0047] 4A-4D, it should be further appreciated that the pedal assemblies 122 may be coupled to the base 114 in a variety of orientations, which may be determined based on the limb for which the load-bearing simulation is to be performed. For example, as shown in FIG. 4A, a single pedal assembly (e.g., the first pedal assembly 122a) may be coupled to the third rail 108c (e.g., the center rail). In these embodiments, the at least one foot 130 of the first pedal assembly 122a may be shaped to the third rail 108c such that the at least one foot 130 is received by and movable (e.g., longitudinally) along the third rail 108c.

[0048] Similarly, the pedal assembly 122 may be further coupled along a side of the second section 114b of the base 114. For example, as shown in FIG. 4B , the pedal assembly 122 may engage the first rail 108a and the third rail 108c such that the pedal assembly 122 is aligned with the subject's right lower extremity. It should be understood that the configuration shown in FIG. 4B may be particularly suitable for performing load-bearing simulations on the subject's right lower extremity (e.g., foot, ankle, etc.). Alternatively, as shown in FIG. 4C , the pedal assembly 122 may engage the second rail 108b and the third rail 108c such that the pedal assembly 122 is aligned with the subject's left lower extremity. As described herein, this configuration may enable load-bearing simulations on the subject's left lower extremity.

[0049] 4D, a pair of pedal assemblies (e.g., first and second pedal assemblies 122a and 122b) may be movably coupled to the base 114. As described in detail herein with reference to FIG. 2, the use of the first and second pedal assemblies 122a and 122b may allow for simultaneous weight-bearing simulation of the subject's left and right lower extremities, which may be useful for imaging the subject's hip and / or knee joints.

[0050] Turning now to FIG. 5, another embodiment of subject imaging assembly 100'' is shown. Subject imaging assembly 100'' is similar to subject imaging assembly 100' and subject imaging assembly 100 described herein. As such, like structures are indicated using like reference numerals.

[0051] 5, the second section 114b of the base 114 may include multiple rails 108, such as a first rail 108a and a second rail 108b. In these embodiments, the second section 114b may further include a movable member 140 configured to engage or move (e.g., longitudinally) along the first rail 108a and the second rail 108b. For example, in these embodiments, the movable member 140 may include a pair of feet, such as a first foot 142a and a second foot 142b, that may be shaped similarly to the multiple rails 108 such that the first foot 142a and the second foot 142b of the movable member 140 are received by the first rail 108a and the second rail 108b, respectively.

[0052] 5, the movable member 142 may further include a slot 144 extending along at least a portion of the length of the movable member 142. In these embodiments, the pedal assembly 122 may be movably coupled to the slot 144 such that the pedal assembly 122 may move along at least a portion of the length of the movable member 142 (e.g., laterally).

[0053] In operation, the movable member 142 may move within the plurality of rails 108 to adjust the distance between the pedal assembly 122 and the subject, while the pedal assembly 122 may move (e.g., laterally) within the slot 144 of the movable member to adjust the orientation (e.g., alignment) of the pedal assembly 122 relative to the subject's lower limb. For example, in these embodiments, a larger subject and / or a subject with wider hips may require the pedal assembly 122 to move toward the outer edge of the movable member 142 to ensure that the pedal assembly 122 is properly aligned with the limb that will be subjected to the weight-bearing simulation.

[0054] Although not shown, it will be understood that the movable member 142 shown in Figure 5 may further include multiple pedal assemblies 122 as discussed herein with reference to Figures 2 and 4D. In these embodiments, the first and second pedal assemblies may be movably coupled to slots 144 of the movable member 142 such that each of the pedal assemblies is movable laterally for alignment with the subject's lower extremities.

[0055] 6, the operation of pedal assembly 122 will now be described in further detail. For example, during an imaging procedure, pedal assembly 122 receives a compressive force applied via the subject's lower extremities and provides a resistive force corresponding to the compressive force to simulate the subject's weight-bearing condition. In an embodiment, pedal assembly 122 includes an adjustable spring assembly that provides an adjustable amount of resistive force that is tailored to the subject to ensure that the subject applies an appropriate amount of compressive force to pedal assembly 122 to simulate the subject's weight-bearing condition. For example, in an embodiment, pedal assembly 122 may be adjusted so that the subject is required to apply a compressive force corresponding to approximately half of their body weight to place pedal assembly 122 in an imaging condition for image capture.

[0056] 6 and 7A-7C, various views of pedal assembly 122 will now be described. Pedal assembly 122 includes a spring assembly 302 supported via a pedal support assembly 328. Spring assembly 302 includes a contact plate 304, a compression plate 306, and a first spring member 310 extending between contact plate 304 and compression plate 306. Contact plate 304 faces subject support portion 118 when pedal assembly 122 is placed on mounting surface 116 of base 114. A subject being imaged typically places the bottom of their foot in contact with contact plate 304 to apply a load to contact plate 304. As shown in FIG. 6, the contact plate 304 may include a heel cup 394 mounted thereon to assist the subject in properly positioning the foot against the first spring member 310 to ensure that a uniform compressive force is applied to the foot via the spring assembly 302.

[0057] In an embodiment, the heel cup 394 is rotatably mounted on the contact plate 304. It should be understood that alternative embodiments for securing the subject's foot relative to the contact plate 304 are contemplated. For example, in some implementations, the contact plate 304 includes an attachment element for an article to be worn by the subject (e.g., a sock, a shoe, etc.). For example, the attachment element may include Velcro® or the like that is also included on the article to be worn by the subject.

[0058] 6 and 7B, spring assembly 302 includes a first spring member 310 and a second spring member 316. First and second spring members 310 and 316 are attached to contact plate 304 and extend in a compression direction between contact plate 304 and compression plate 306. First spring member 310 includes a first spring 312 and a second spring 314, and second spring member 316 includes a third spring 318 and a fourth spring 320. In an embodiment, first spring 312 and second spring 314 are cylindrical polymeric spring members that extend parallel to each other and have axes perpendicular to the compression direction. In an embodiment, the first spring 312 and the second spring 314 are selected in combination to provide an amount of force per unit of compression such that a resistive force can be provided to simulate a loading condition of a subject. The second spring 314 is connected to the compression plate 306 via a fastener (not shown) that passes through the second spring 314 and the compression plate 306. The first spring 312 is connected to the contact plate 304 via a fastener (not shown) that passes from the first spring 312 to the contact plate 304. The first spring 312 is attached to the second spring 314 via a fastener (not shown) that contacts both the first and second springs 312 and 314. The third and fourth springs 318 and 320 of the second spring member 316 may be configured similarly to the first and second springs 312 and 314 of the first spring member 310 .

[0059] The first and second spring members 310 and 316 are configured to resist movement of the contact plate 304 in a compressive direction in response to a subject applying a compressive force to the contact plate 304. The compressive direction extends perpendicular to the contact plate 304 and the compression plate 306. Although different situations (e.g., oblique loading) are possible for alternative relative orientations of the compressive direction and contact plate 304, orienting the compressive direction in this manner relative to the compression plate 306 and the contact plate 304 facilitates calibration of the spring assembly 302 by applying a force against the subject's foot relative to a plane under gravity.

[0060] Because the first and second spring members 310 and 316 are distributed to provide resistance to movement across the subject's entire foot, the subject is required to apply a compressive force to the pedal assembly using substantially the entirety of their foot. For example, in an embodiment, the first spring member 310 is positioned to resist movement across a first portion of the subject's foot (e.g., the metatarsal portion), and the second spring member 316 is positioned to resist movement across a second portion of the subject's foot (e.g., the calcaneus portion). In this manner, the spring assembly 302 ensures that the subject applies approximately 50% of the compressive force using the metatarsal portion and approximately 50% of the compressive force using the calcaneus portion. This configuration prevents the subject from applying weight using only a portion of their foot and ensures that the pedal assembly 122 simulates the subject's true weight-bearing conditions. The first and second spring members 310 and 316 may each exert the same resistance to movement of the contact plate 304 to simulate a uniform load applied across the subject's foot. In embodiments, the first and second spring members 310 and 316 resist movement of the contact plate 304 with different amounts of force to provide a customized distribution of load to the subject's foot.

[0061] In these embodiments, pedal assembly 122 may further include a plurality of indicators 330 that may provide visual and / or audio cues to the subject, technician, and / or physician that a desired force balance has been achieved during imaging. For example, first and second spring members 310 and 316 may each exert the same resistance to movement, allowing the subject and / or technician to recognize that the compression forces are not balanced when contact plate 304 is tilted. For example, in some embodiments, the plurality of indicators 330 may include a light and / or a buzzer that provides visual and / or audio feedback to the subject and / or technician that the proper force balance has been achieved.

[0062] Additionally, in some embodiments, subject imaging assembly 100 may be further configured to provide markers, such as tantalum markers, or other visual indications on images captured during load-bearing simulation using pedal assembly 122. For example, when imaging is performed with proper force balance, the resulting captured images may include markers that provide a technician with confirmation that force balance was achieved during image capture. This allows the technician to ensure the accuracy of the load-bearing and simulation images when the images are later reviewed and / or reviewed as part of the subject's medical record.

[0063] 6 and 7B, the number of spring members included in spring assembly 302 may vary. For example, some embodiments include only a single spring member (e.g., an intermediate portion between contact plate 304 and compression plate 306). For example, in embodiments in which load-bearing simulation is performed on a patient's hip and / or knee joint, balancing of compressive forces between the forefoot and hindfoot may not be necessary. Thus, in these embodiments, a spring assembly having only a single spring member may be sufficient to perform load-bearing simulation and capture images for a given limb.

[0064] Additionally, the first and second spring members 310 and 316 may have a variety of alternative configurations beyond those shown. For example, in embodiments, the first and second spring members 310 and 316 may each include only a single spring. In such embodiments, the single spring of the first and second spring members 310 and 316 may take the form of the first spring 312 described above (e.g., a cylindrical polymer spring member with an axis oriented perpendicular to the direction of compression). Alternatively, the single spring may take another form (e.g., a metal leaf spring, a coiled spring member, an elastomeric material, etc.). The spring assembly 302 may include any number of springs of any form consistent with the present disclosure.

[0065] In embodiments, the spring assembly 302 may have a sensor (not shown) for measuring the compressive force applied by the subject. For example, in embodiments, the spring assembly 302 includes a pressure sensor adapted to measure the compressive force applied by the subject to the contact plate 304. The pressure sensor may include a piezoelectric pressure sensor, an electromagnetic pressure sensor, an optical pressure sensor, a capacitive pressure sensor, or any other available pressure sensor adapted to measure the compressive force applied via the subject's foot. In embodiments, the spring assembly 302 may include multiple pressure sensors for measuring the pressure applied via the subject at various portions of the contact plate 304 (e.g., corresponding to portions of the contact plate 304 covering the first and second spring members 310 and 316). Alternatively or additionally, the spring assembly 302 may include a force sensor configured to measure the resultant force applied to the contact plate 304. In some embodiments in which the spring assembly 302 includes such a sensor, the spring assembly 302 may not include the first and second spring members 310 and 316, and the pedal assembly 122 may provide an indication via the sensor (e.g., via a light or sound generator coupled to the sensor) when the subject applies a desired amount and distribution of compressive force to the contact plate 304 for imaging.

[0066] As shown in FIG. 6 , the pedal support assembly 328 is oriented so that the contact plate 304 and the compression plate 306 extend generally perpendicular to the mounting surface 116 of the base 114 shown in FIGS. 1A-1B and 2 . Such an orientation may be beneficial for imaging the subject's ankle. However, it may also be beneficial to image the subject's foot in alternative orientations. For example, to facilitate imaging various regions of the subject's foot (e.g., the ankle, forefoot, or hindfoot), it may be useful to adjust the orientation of the spring assembly 302 so that the contact plate 304 and the compression plate 306 extend at an angle of approximately 30 degrees or approximately 60 degrees, or at any angle between and including 0 degrees and 60 degrees. In this regard, the pedal support assembly 328 is supported by an adjustable support element having multiple support positions. In an embodiment, a user can select multiple support positions to change the orientation of the spring assembly 302 (e.g., to adjust the relative angle between the compression direction and the extension direction of the base 114).

[0067] 7B and 7C, pedal assembly 122 further includes depth stop plate 400. Depth stop plate 400 includes a threaded rod 402 having a plunger disposed in an opening formed therein. A spring element supports the plunger within the opening. In an embodiment, the spring element is attached to a compression plate (e.g., compression plate 306) of a spring assembly (e.g., spring assembly 302). For example, in an embodiment, the plunger of depth stop plate 400 extends from compression plate 306 and is supported by the spring element such that the end of the plunger extends outward from threaded rod 402. In operation, when a subject applies a load to contact plate 304 and contact plate 304 contacts depth stop plate 400, contact plate 304 initially compresses the spring element through contact with the end of the plunger. The spring element beneficially reduces the impact between the contact plate 304 and the depth stop plate 400 .

[0068] In these embodiments, the depth stop plate 400 may also be used to limit movement of the contact plate 304 in the compression direction toward the compression plate 306. The depth stop plate 400 may include an opening 408 formed therein that receives the tab 306a of the compression plate 306. A user can then adjust the tab 306a of the compression plate 306 within the opening 408 of the depth stop plate 400 to limit movement of the contact plate 304 toward the compression plate 306 based on the subject's weight. In operation, when the subject applies a load to the contact plate 304 and the contact plate 304 contacts the depth stop plate 400, movement of the contact plate 304 in the compression direction toward the compression plate 306 is prevented.

[0069] 7B , an adjustment knob 470 coupled to the depth stop plate 400 can be used to control the resistance force provided by the pedal assembly 122 when the subject compresses the contact plate 304 in a compressive direction toward the compression plate 306. For example, rotation of the adjustment knob 470 by a user causes rotation of the threaded rod 402, which in turn adjusts the position of the depth stop plate 400 to adjust the compressive force applied via the spring assembly 302 when the spring assembly 302 is placed in a loaded state.

[0070] Referring now to FIG. 8 , a flow diagram of an exemplary method 800 for capturing load-bearing images of a subject's lower extremities is shown. Method 800 can be implemented via a load-bearing simulation assembly 112 described herein used in combination with a subject imaging assembly. For example, in an embodiment, to capture load-bearing images of a subject's lower extremities via implementation of method 800, load-bearing simulation assembly 112 can be mounted on support platform 102 of subject imaging assembly 100 described herein with reference to FIGS. 1A-1B . In an embodiment, load-bearing simulation assembly 112 can be calibrated prior to implementation of method 800. For example, practice weights can be applied to pedal assembly 122 to calibrate the setting to spring assembly 302.

[0071] In block 802, a subject is positioned on the subject support of the load-bearing simulation assembly 112. In an embodiment, the load-bearing simulation assembly 112 may be mounted on the support platform 102, which may be offset from the imaging system to facilitate positioning the subject on the subject support 118.

[0072] In block 804, the load-bearing simulation assembly 112 is adjusted based on the subject and imaging requirements. For example, in an embodiment, the distance 124 between the subject support portion 118 and the pedal assembly 122 is adjusted based on the length of the subject's leg to be imaged. In an embodiment, the distance 124 is adjusted so that the subject's leg extends in a first direction and so that substantially the entire subject's leg contacts the resting surface 116 of the base 114. In an embodiment, the relative angle between the first direction and the compression direction of the pedal assembly 122 can be adjusted based on the portion of the subject's lower extremity to be imaged. For example, in an embodiment, to image the subject's ankle, a first support position is selected such that the compression direction is at an angle of 0 degrees (e.g., parallel or nearly parallel) with respect to the first direction. In an embodiment, to image the subject's forelimb, a second support position is selected such that the compression direction is at an angle of 30 degrees with respect to the first direction. In an embodiment, when imaging the rear foot of a subject, the third support position is selected so that the angle of the compression direction relative to the first direction is 45 degrees.

[0073] At block 806, the subject is secured to the load-bearing simulation assembly 112. For example, in embodiments, the subject's feet are secured to the pedal assemblies 122 by placing the subject's heels in the heel cups 394 and / or fastening adjustable straps around the subject's feet. Alternatively, in embodiments in which the subject's knees and / or hips are imaged, the subject may be secured by pressing the subject's shoulders against a pair of brackets 126 and resting the subject's head and / or neck on the support 128. At block 808, the load-bearing simulation assembly 112 is positioned for imaging. Note that in these embodiments, the positioning of the load-bearing simulation assembly 112 and the subject may vary depending on the subject's dimensions (e.g., weight, height, etc.) and the area of ​​the subject being imaged.

[0074] In an embodiment, adjusting the load-bearing simulation assembly 112 includes adjusting the position of the depth stop plate 400 between the contact plate 304 and the compression plate 306 based on the subject's weight. As described herein, adjusting the depth of the depth stop plate 400 determines the compressive force applied to the contact plate 304 via the first and second spring members 310 and 316 when the subject applies a load to the contact plate 304. The load applied by the subject causes the contact plate 304 to contact the depth stop plate 400. In this manner, the position of the depth stop plate 400 determines the compressive force applied via the first and second spring members 310 and 316. In an embodiment, calibrating the spring assembly 302 is performed by placing a scale in contact with the contact plate 304 and using the scale to measure the compressive force applied via the first and second spring members 310 and 316 as a function of the rotational position of the adjustment knob 470. In an embodiment, adjusting the load-bearing simulation assembly 112 involves rotating the adjustment knob 470 to a certain position so that the compressive force applied via the first and second spring members 310 and 316 corresponds to approximately one-half of the subject's body weight.

[0075] In block 810, the subject is instructed to apply a force to the pedal assembly 122. For example, once the pedal assembly 122 is placed in the imaging system, the subject may be instructed to press the contact plate 304 with their foot to compress the first and second spring members 310 and 316 in a compressive direction. The instructions may be automated (e.g., transmitted via a speaker system). In block 812, when the subject contacts the contact plate 304 with the depth stop plate 400, the first and second spring members 310 and 316 exert a compressive force tailored specifically for the subject, and an image of the subject's lower extremity is captured. The imaging system may capture a CT scan or MRI image of the subject's lower extremity while the lower extremity is in a weight-bearing condition to capture measurements of the three-dimensional structure of the subject's lower extremity.

[0076] In light of the above, it should be appreciated that a load-bearing simulation assembly compatible with existing imaging systems can be used to capture three-dimensional images of a subject's lower extremities while the lower extremities are in a load-bearing condition. The load-bearing simulation assembly described herein includes a pedal assembly with an adjustable spring assembly. The spring assembly disclosed herein is easily adjustable by changing the relative positioning of a travel limiter located between a contact plate and a compression plate to limit the range of motion of the contact plate so that, when the spring assembly is placed in a load condition by the subject, the spring assembly applies a compression force to the contact plate that is specifically tailored for the subject. Furthermore, the relative angle between the compression force and the imaging axis of the imaging system can be adjusted to facilitate imaging of multiple regions of the subject's foot. Thus, the assemblies and methods described herein facilitate low-cost load-bearing imaging at a relatively low cost by providing compatibility with existing imaging systems.

[0077] Embodiments can be further described by reference to the following numbered bullet points:

[0078] Clause 1. A load-bearing simulation assembly, comprising: a base having a support surface, the base further including a first section and a second section hingedly connected to each other so that the first section and the second section can be folded relative to each other; a subject support portion mounted on the first section of the support surface; and a pedal assembly mounted on the second section of the support surface, the pedal assembly being spaced a predetermined distance from the subject support portion, the pedal assembly comprising a contact plate configured to receive a compressive force from a subject, measure the compressive force, and provide an indication that the compressive force corresponds to the load-bearing condition of the subject.

[0079] Clause 2. The load-bearing simulation assembly of clause 2, wherein the base further includes a movement support mechanism configured to connect the pedal assembly to the second section of the support surface such that the pedal assembly is translatable longitudinally along the base.

[0080] Clause 3. The load-bearing simulation assembly of clause 1 or 2, wherein the first section of the mounting surface further comprises a cavity.

[0081] Clause 4. The load-bearing simulation assembly of any one of clauses 1 to 3, wherein the subject support portion is foldable into the cavity formed in the first section of the support surface.

[0082] Clause 5. The load simulation assembly of any one of clauses 1 to 4, wherein the load simulation assembly further comprises a pair of brackets coupled to the first section of the base.

[0083] Clause 6. The load simulation assembly of any one of clauses 1 to 5, wherein the load simulation assembly further comprises a support coupled to the first section of the base.

[0084] Clause 7. The load-bearing simulation assembly of any one of clauses 1 to 6, wherein the pedal assembly is removably coupled to the second section of the rest surface.

[0085] Clause 8. The load-bearing simulation assembly of any one of clauses 1 to 7, wherein the subject support portion is removably mounted to the first section of the support surface.

[0086] Clause 9. The load simulation assembly of any one of clauses 1 to 8, wherein the load simulation assembly further comprises a third section configured to extend a length of the base.

[0087] Clause 10. The load-bearing simulation assembly of any one of clauses 1 to 9, wherein a pair of brackets and supports are coupled to the third section of the base.

[0088] Clause 11. A load-bearing simulation assembly, the load-bearing simulation assembly comprising: a base having a mounting surface, the base further including a first section having a plurality of protrusions and a second section having a plurality of rails, the plurality of rails configured to receive the plurality of protrusions; and at least one pedal assembly movably coupled to the second section of the base, the at least one pedal assembly comprising a contact plate that receives a compressive force from a subject, measures the compressive force, and provides an indication that the compressive force corresponds to a loading condition of the subject.

[0089] Clause 12. The load-bearing simulation assembly of clause 11, wherein the plurality of protrusions and the plurality of rails have a dovetail profile.

[0090] Clause 13. A load-bearing simulation assembly as described in any one of clauses 11 to 12, wherein the at least one pedal assembly further includes at least one foot configured to be received by at least one of the plurality of rails.

[0091] Clause 14. The load-bearing simulation assembly of any one of clauses 11 to 13, wherein at least one pedal assembly is longitudinally movable along at least one of the plurality of rails.

[0092] Clause 15. The load simulation assembly of any one of clauses 11 to 14, further comprising a movable member having a pair of feet coupled to the plurality of rails so as to move longitudinally along the plurality of rails.

[0093] Clause 16. The load-bearing simulation assembly of any one of clauses 11 to 15, wherein the movable member further includes a slot extending along at least a portion of the length of the movable member.

[0094] Clause 17. A load-bearing simulation assembly as described in any one of clauses 11 to 16, wherein the at least one pedal assembly is movably coupled to the slot of the movable member so that the at least one pedal assembly moves laterally along the slot.

[0095] Clause 18. A load-bearing simulation assembly according to any one of clauses 11 to 17, wherein the load-bearing simulation assembly is compatible with a medical resonance imaging device.

[0096] Clause 19. A load simulation assembly according to any one of clauses 11 to 18, wherein the load simulation assembly is compatible with a computed tomography scanning device.

[0097] Clause 20. A method for capturing an image of a subject using a load simulation assembly, said method comprising the steps of: positioning the subject on a subject support portion of said load simulation assembly; adjusting said load simulation assembly based on the subject and imaging requirements; securing said subject to said load simulation assembly; positioning said load simulation assembly for imaging; instructing the subject to apply a force to a pedal assembly disposed on said load simulation assembly; and capturing said image of a limb of the subject.

[0098] The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural, including "at least one," unless the context clearly dictates otherwise. "Or" means "and / or." As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Furthermore, as used herein, "comprises" and / or "comprising," or "includes" and / or "including" specify the presence of stated features, regions, integers, steps, operations, elements, and / or components, but are understood not to exclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and / or groups thereof. The term "or a combination thereof" means a combination including at least one of the aforementioned elements.

[0099] It should be noted that the terms "substantially" and "about" may be used herein to express the degree of uncertainty inherent in any quantitative comparison, value, measurement, or other representation. These terms are also used herein to express the extent to which a quantitative representation may vary from a stated standard without changing the basic functionality of the subject matter at issue.

[0100] While particular embodiments have been illustrated and described herein, it should be understood that various changes and modifications can be made therein without departing from the spirit and scope of the claims. Moreover, although various aspects of the claimed subject matter have been described herein, such aspects do not necessarily have to be utilized in combination. It is, therefore, intended by the appended claims to cover all such changes and modifications that are within the scope of the claimed subject matter.

Claims

1. 1. A load application simulation assembly, comprising: a base having a mounting surface, the base further including a first section and a second section hingedly connected to each other so as to be foldable relative to each other; a subject support portion positioned on the first section of the support surface; a pedal assembly mounted on the second section of the support surface, the pedal assembly being spaced a predetermined distance from the subject support portion; Equipped with The pedal assembly includes: receive a compressive force from the subject, measuring the compressive force; a contact plate configured to provide an indication that the compressive force corresponds to a load-bearing condition of the subject; Load-loading simulation assembly.

2. 2. The load-bearing simulation assembly of claim 1, wherein the base further comprises a movement support mechanism configured to couple the pedal assembly to the second section of the support surface such that the pedal assembly is movable longitudinally along the base.

3. The load-bearing simulation assembly of claim 1 , wherein the first section of the resting surface further comprises a cavity.

4. 4. The load-bearing simulation assembly of claim 3, wherein the subject support portion is foldable into the cavity formed in the first section of the rest surface.

5. The load simulation assembly of claim 1 , further comprising a pair of brackets coupled to the first section of the base.

6. The load simulation assembly of claim 1 , further comprising a support coupled to the first section of the base.

7. The load-bearing simulation assembly of claim 1 , wherein the pedal assembly is removably coupled to the second section of the resting surface.

8. 10. The load-bearing simulation assembly of claim 1, wherein the subject support is removably mounted to the first section of the rest surface.

9. The load simulation assembly of claim 1 , further comprising a third section configured to extend the length of the base.

10. The load simulation assembly of claim 9 , wherein a pair of brackets and supports are coupled to the third section of the base.

11. 1. A load application simulation assembly, comprising: a base having a mounting surface, the base further including a first section having a plurality of protrusions and a second section having a plurality of rails, the plurality of rails configured to receive the plurality of protrusions; at least one pedal assembly movably coupled to the second section of the base; Equipped with The at least one pedal assembly includes: Receives compressive force from the subject, measuring the compressive force; a contact plate configured to provide an indication that the compressive force corresponds to a load-bearing condition of the subject; Load-loading simulation assembly.

12. The load-bearing simulation assembly of claim 11 , wherein the plurality of protrusions and the plurality of rails have a dovetailed profile.

13. The load-bearing simulation assembly of claim 11 , wherein the at least one pedal assembly further includes at least one foot configured to be received by at least one of the plurality of rails.

14. The load-bearing simulation assembly of claim 11 , wherein the at least one pedal assembly moves longitudinally along at least one of the plurality of rails.

15. The load simulation assembly of claim 11 , further comprising a movable member having a pair of feet coupled to the plurality of rails for longitudinal movement along the plurality of rails.

16. The load-bearing simulation assembly of claim 15 , wherein the movable member further includes a slot extending along at least a portion of the length of the movable member.

17. 17. The load-bearing simulation assembly of claim 16, wherein the at least one pedal assembly is movably coupled to the slot of the movable member such that the at least one pedal assembly moves laterally along the slot.

18. The load-bearing simulation assembly of claim 11 , wherein the load-bearing simulation assembly is compatible with a medical resonance imaging device.

19. The load simulation assembly of claim 11 , wherein the load simulation assembly is compatible with a computed tomography scanning device.

20. 1. A method for capturing an image of a subject using a load-bearing simulation assembly, the method comprising: placing the subject on a subject support portion of the load-bearing simulation assembly; adjusting the load-bearing simulation assembly based on the subject and imaging requirements; securing the subject to the load-bearing simulation assembly; positioning the load-bearing simulation assembly for imaging; instructing the subject to apply a force to a pedal assembly disposed on the load-bearing simulation assembly; capturing the image of the limb of the subject.

Images