Patent Description:
Ultrasound devices (e.g., a probe, sensor, or the like) can be positioned proximate to an anatomy (e.g., a prostate, diaphragm, abdomen, or the like) of a patient. A device can hold the ultrasound device in a position proximate to the anatomy of the patient.

<CIT> describes a patient trolley configured for transporting a patient to a target modality includes a top portion having a top surface and an overhang area along at least one side of the top portion, a bottom portion supporting the top portion, and a side rail coupled to the top portion for movement between a deployed position and a stowed position. The patient trolley is configured to dock adjacent the target modality such that the overhang area is capable of extending over at least a portion of the target modality. The patient trolley may be combined with a patient transfer device to facilitate transfer of a patient from the top surface of the patient trolley to the patient support surface of the target modality. Methods of docking the patient trolley adjacent a target modality and transferring a patient from the patient trolley to the target modality are also provided.

<CIT> describes a computed tomography-fluoroscopy method for interventions comprising the steps of combining a floating patient table with a cross-sectional imaging modality for interventions under visual computed tomography control. A handle is installed on the patient table, which is mechanically decoupled from the central control system. During an intervention, the table is brought to a random position, and a single-scan or scan-series is triggered. A light-beam localizer is used for orientation and positioning the single-scan or scan-series.

<CIT> describes a lateral decubitus precision patient support system and method for positioning a patient's breast relative to a patient support surface to receive therapy, such as, radiation treatment, while the patient is in a lateral decubitus position (lying on the patient's side) upon a patient support surface is disclosed. The lateral decubitus precision support assembly may be securely attached to a treatment table during use. The lateral decubitus precision support assembly may include a contralateral breast module having at least one contralateral breast receiving area into which a contralateral breast of the patient may reside during breast therapy. The lateral decubitus precision support assembly may also include a treatment breast support that contacts a treatment breast of the patient to separate the treatment breast from the contralateral breast of patient to limit exposure of the contralateral breast to therapeutic procedures administered to the patient.

<CIT> describes an imaging probe manipulator for use during a medical procedure and includes a first manipulator linkage having a connector configured to attach to an imaging probe, a second manipulator linkage coupled to the first manipulator linkage at a first joint a third manipulator linkage coupled to the first or second manipulator linkage at a second joint. The first joint or the second joint has a degree of freedom. The imaging probe manipulator includes a force control transmission linked to the degree of freedom. The force control transmission component is configured to maintain a pre-determined force on the imaging probe when the imaging probe is in contact with a patient.

The present inventors have recognized, among other things, that a problem to be solved can include attaching and detaching a handle from a portable overlay base without the use of tools. The portable overlay base can be used to provide rails usable to slidably move an ultrasound probe holder toward or away from a patient resting on the overlay base. Additionally, the present inventors have recognized, among other things, that a problem to be solved can include providing a handle that is detachable from the overlay base while having a resilient engagement between the handle and the base. Further, the present inventors have recognized, among other things, that a problem to be solved can include supporting an ultrasound device and facilitating the positioning of the ultrasound device proximate to an anatomy of the patient.

The present subject matter can help provide a solution to this problem, such as by providing an overlay system for providing a movable interface between an ultrasound probe holder and a couch for radiotherapy. The overlay system can include a substantially planar overlay base including a top side. The base can define a handle receptacle, for instance at a first end of the base. The handle receptacle can include a handle capture section optionally having a tapered profile. A centrally located elongated guide can extend longitudinally along the top side of the base to guide translational movement of the ultrasound probe holder along a longitudinal axis of the base. A handle can be configured to be attached and detached, by a user, with the handle receptacle of the base. The handle can define a channel optionally having a wedge profile. The wedge profile of the handle can correspond to the tapered profile of the handle receptacle. Engagement of the channel to the capture section of the handle receptacle can attach the handle to the base.

The engagement of the channel to the capture section can provide a resilient engagement between the handle and the base. In an example, a user can attach the handle with the base, and a patient can rest upon the base. The user can lift the handle, and move (e.g., adjust the position of) the base. For example, the user can adjust the position of the base by engaging with the handle. The handle can be removed to help transport of the system. The handle can be removed to help facilitate removal of the probe holder from the base. The handle can be removed to help facilitate cleaning (e.g., sanitizing or the like) of the system.

In some examples, a pin (e.g., a fastener or the like) can be engaged with the handle to attach the handle with the base. However, engaging the pin with the handle can be cumbersome, and can require the usage of tools (e.g., pliers, wrenches, screwdrivers, or the like). The engagement of the channel to the capture section of the handle receptacle can readily attach the handle with the base and facilitate readily attaching and detaching the handle from the base.

Additionally, the overlay system can include one or more indexed engagement features, and the engagement features can couple with a support for an ultrasound device. The indexed engagement features can allow a user to locate the ultrasound device in a plurality of positions, and the engagement features can allow a user to readily locate the ultrasound device in the same position with respect to the patient. In an example, a patient can undergo one or more medical procedures, for instance over the course of multiple days. The indexed engagement features can facilitate locating ultrasound device in the same position with respect to the patient during the one or more medical procedures.

In the drawings, which are not necessarily, drawn to scale, like numerals may describe similar components in different views.

<FIG> is an exploded view of portions of an overlay system <NUM> for providing a movable interface between an ultrasound probe holder <NUM> and a couch for radiotherapy. For instance, the couch can include a platform sized and shaped to support a patient undergoing one or more medical procedures. The overlay system <NUM> can include an overlay base <NUM> and at least one guide <NUM>. The overlay base <NUM> can be configured to couple with leg supports or knee supports, and the supports can help maintain the position of a patient while undergoing medical treatments. Additionally, the guide <NUM> can guide translational movement of the ultrasound probe holder <NUM> along a longitudinal axis of the base <NUM>. Accordingly, the probe holder <NUM> can be repositioned with respect to the base <NUM> (and a patient when the patient is resting upon the overlay system <NUM>).

The overlay system <NUM> can include a handle <NUM>. The handle <NUM> can attach to, and detach from, the overlay base <NUM>. The overlay base <NUM> can define at least one handle receptacle <NUM>. The handle <NUM> can be engaged with the handle receptacle <NUM>, such as to attach the handle <NUM> to the base <NUM>. Additionally or alternatively, the handle <NUM> can be disengaged from the handle receptacle <NUM>, such as to detach the handle <NUM> from the base <NUM>.

Further, the overlay system <NUM> can include a locking plate <NUM>. The locking plate <NUM> can be sized and shaped to engage with the base, such as by engaging with the handle receptacle <NUM>. The engagement of the locking plate <NUM> with the handle receptacle <NUM> can couple the locking plate <NUM> to the base <NUM>. As described in greater detail herein, the locking plate <NUM> can be sized and shaped to, (when the locking plate <NUM> is in place and engaged with the base <NUM>) inhibit the handle <NUM> from transitioning from an attached configuration (e.g., when the handle <NUM> is engaged with the handle receptacle <NUM>) to a detached configuration <NUM> (e.g., when the handle <NUM> is disengaged from the handle receptacle <NUM>.

<FIG> is a top view of an example of the overlay base <NUM>. As described herein, the base <NUM> can define the handle receptacle <NUM>, which can extend partially or completely through the base <NUM>, and the handle receptacle <NUM> can have receptacle walls <NUM>.

The handle receptacle <NUM> can include (e.g., the base <NUM> can define) an insertion section <NUM> and a handle capture section <NUM>. The insertion section <NUM> can be sized and shaped to accommodate an end of the handle <NUM> (e.g., the end <NUM> shown in <FIG>), for instance when the handle <NUM> is inserted by a user (e.g., a technician, a nurse, a doctor, or the like) into the handle receptacle <NUM>. Additionally or alternatively, the handle <NUM> can be removed from the handle receptacle <NUM>, for instance when the handle <NUM> is located in the insertion section <NUM>. The insertion section can be larger (e.g., wider, or the like) than the capture section <NUM>
The handle <NUM> can translate between the insertion section <NUM> and the capture section <NUM>. For instance, translating the handle <NUM> between the insertion section <NUM> and the capture section <NUM> can transition the handle <NUM> between the detached configuration and the attached configuration. In an example, a user can insert the handle <NUM> into the insertion section <NUM>, and the user can translate (e.g., move, slide, push, pull, twist, or the like) the handle <NUM> to the capture section <NUM>. The handle <NUM> can engage with the handle receptacle <NUM> when the handle <NUM> is in the capture section <NUM>, and the handle <NUM> can be attached (e.g., coupled, secured, fastened, or the like) to the base <NUM>.

The user can translate the handle <NUM> to the insertion section <NUM> from the capture section <NUM>. The handle <NUM> can disengage from the handle receptacle <NUM> when the handle is in the insertion section <NUM>, and the handle <NUM> can be detached from the base <NUM>. Accordingly, the handle <NUM> can be engaged to, or disengaged from, the base <NUM> without tools (e.g., a screwdriver, pliers, wrench, or the like).

The capture section <NUM> can be tapered. The insertion section can be tapered. For example, a width the capture section <NUM> can have a first dimension proximate to the insertion section <NUM> (e.g., the capture section <NUM> can have an equal width to the insertion section at the interface of the sections <NUM>, <NUM>). Additionally or alternatively, the insertion section <NUM> can have a second dimension when remote from the capture section <NUM> (e.g., the capture section <NUM> can have a smaller width, or neck down, at an end of the capture section <NUM> that is remote from the insertion section <NUM>).

The base <NUM> can define indexed engagement features <NUM> such as for coupling the base <NUM> to an indexing bar (e.g., a bar including protrusions that provide a fixed reference point, for instance a reference point for positioning items on a couch). Each of the engagement features <NUM> can correspond to at least one corresponding marking <NUM> of the base <NUM>. For example, the corresponding markings <NUM> can convey information about the spacing between adjacent engagement features <NUM>, or about a cumulative distance from a reference marking and corresponding engagement feature <NUM>. The engagement features <NUM> can engage directly to a couch, such as a couch, or indirectly to the couch, such as via an indexing bar.

The base <NUM> can include a central guide region <NUM>, such as indicated by the dashed lines in <FIG>. The central guide region <NUM> can include the one or more (e.g., a pair) of guide rails <NUM>. Each of the guide rails <NUM> can include a V-shaped or other interior (e.g., inward-facing) groove and V-shaped or other exterior (e.g., laterally outward facing) groove. The interior grooves can face each other. An ultrasound probe holder, such as the ultrasound probe holder <NUM> (shown in <FIG>) can engage with and can be guided in a longitudinal direction by the guide rails <NUM>.

In <FIG>, the handle receptacle <NUM> can be defined in the base <NUM> proximate to a first end <NUM> of the base <NUM>. However, the handle receptacle <NUM> can be defined in different locations on the base <NUM>. A plurality of handle receptacles <NUM> can be located around a periphery of the base <NUM>. The handle receptacles <NUM> can be located within the central guide region <NUM>. The handle receptacles <NUM> can be arranged in a geometric (e.g., circular) pattern to allow for repositioning the handle <NUM> in a plurality of positions with respect to the base <NUM>.

<FIG> is an isometric view of an example of the handle <NUM>. The handle <NUM> can define a channel <NUM>. The channel <NUM> can be sized and shaped to engage (e.g., receive) to a receptacle (e.g., the handle receptacle <NUM>) of the base <NUM> (shown in <FIG>). The channel <NUM> can engage to the capture section <NUM> of the handle receptacle <NUM> (shown in <FIG>), and the engagement of the channel <NUM> with the capture section <NUM> can attach the handle <NUM> to the base <NUM>. For instance, the receptacle walls <NUM> (shown in <FIG>) can be received in the channel <NUM> and the reception of the walls <NUM> in the channel <NUM> can attach the handle <NUM> to the base <NUM>.

An end <NUM> of the handle <NUM> can be sized and shaped to be inserted into the handle receptacle <NUM>, for instance the end <NUM> can be inserted into the insertion section <NUM> of the handle receptacle <NUM>. The handle <NUM> can include a stop <NUM>, and the stop <NUM> can help inhibit or prevent over-insertion of the handle <NUM> into the handle receptacle <NUM>. For instance, the stop <NUM> can engage with the base <NUM> and the engagement of the stop <NUM> with the base <NUM> can align the channel <NUM> with the handle receptacle <NUM>. In an example, the stop <NUM> can be located on the handle <NUM> proximate to the channel <NUM>, and the channel <NUM> can be located proximate to the end <NUM> of the handle <NUM> (e.g., the channel <NUM> can be located between the end <NUM> and the stop <NUM>). The stop <NUM> can facilitate the alignment of the channel <NUM> with the walls <NUM> (shown in <FIG>) of the handle receptacle <NUM>, for instance to simplify engagement of the handle <NUM> with the handle receptacle <NUM>.

The handle <NUM> can have any of a variety of profiles. As shown in <FIG>, the handle <NUM> can be U-shaped and include a pair of ends <NUM>. In another example, the handle <NUM> can be linear (e.g., a post) with a single end <NUM>. As shown in <FIG>, the handle <NUM> can have (but is not limited to) an oval cross-section. However, the handle <NUM> can include a circular cross-section, a rectangular cross-section, other geometric-shaped cross-section, or an irregular cross-section. Further, the overlay system <NUM> can include a plurality of handles <NUM>, and the handles <NUM> can be located at one or more positions with respect to the base <NUM> (e.g., the base <NUM> can define a plurality of handle receptacles <NUM>, for instance at a plurality of locations around a periphery of the base <NUM> or the central guide region <NUM>.

<FIG> is a bottom view of the handle <NUM> of <FIG> with a portion of the handle <NUM> hidden for clarity. As described herein, the handle <NUM> can include the channel <NUM>. The channel <NUM> can have a wedge profile. The wedge profile of the channel <NUM> can correspond to the tapered profile of the capture section <NUM> (shown in <FIG>). For instance, the channel <NUM> can include a curved first section <NUM>, and a linear second section <NUM>. The linear second section can extend from the curved first section <NUM>. Additionally, the curved first section <NUM> can be thinner than the linear second section <NUM> (e.g., a thickness of the channel <NUM> can be smaller in the curved first section <NUM> than the thickness of the channel <NUM> in the linear second section).

Further, the channel <NUM> can include a linear third section <NUM> extending from the curved first section <NUM>. In an example, the linear third section <NUM> can extend from a different portion of the first section <NUM> than the linear second section <NUM>. In some examples, the linear second section <NUM> can extend from the first section <NUM> in a first direction, and the linear third section <NUM> can extend from the first section <NUM> in a second direction. Optionally, the thickness of the channel <NUM> between the second section <NUM> and the third section <NUM> can be greater than the thickness of the channel <NUM> in the curved first section <NUM>. The first section <NUM> can be linear, and the second section <NUM> and the third section <NUM> can be curved (or include combinations thereof).

<FIG> is a side view of the handle <NUM> of <FIG>. The channel <NUM> can be defined by channel walls <NUM>. The channel walls <NUM> can have a curved profile, rectangular profile, other geometric-shaped profile, or an irregularly shaped profile. As shown in <FIG>, the channel walls <NUM> include a curved (e.g., semicircle profile). The profile of the channel walls <NUM> can correspond with the profile of the receptacle walls <NUM> of the handle receptacle <NUM> (shown in <FIG>). Accordingly, the channel <NUM> can engage to the handle receptacle <NUM> (e.g., the capture section <NUM>, shown in <FIG>). The channel <NUM> can extend partially (or completely) around a perimeter of the handle <NUM>.

<FIG> is an isometric view of an example of the locking plate <NUM>. The locking plate <NUM> can include a lock body <NUM>, and the lock body <NUM> can be sized and shaped to cover a portion of the handle receptacle <NUM>. The lock body <NUM> can include a wing <NUM>, and the wing <NUM> can cover the insertion section <NUM> of the handle receptacle <NUM> (shown in <FIG>). In this example, when the wing <NUM> covers the insertion section <NUM>, the locking plate <NUM> can inhibit the translation of the handle <NUM> from the capture section <NUM> to the insertion section <NUM>. For instance, the handle <NUM> can engage with the wing <NUM> and the wing <NUM> can inhibit (e.g., interfere, block, prevent, stop, or the like) the translation of the handle <NUM> with respect to the handle receptacle <NUM>. The locking plate <NUM> can engage with the handle <NUM> (e.g., the wing <NUM> can be received in the channel <NUM>) to enhance coupling of the handle <NUM> to the handle receptacle <NUM>.

The locking plate <NUM> can include one or more (e.g., a pair) tabs <NUM>. The tabs <NUM> can project from the lock body <NUM>, for example the wing <NUM>, and the tabs <NUM> can engage with the handle receptacle <NUM> to couple the locking plate <NUM> to the base <NUM> (shown in <FIG>). Further, the tabs <NUM> can engage with other portions of the base <NUM> (e.g., the engagement features <NUM>, shown in <FIG>) to couple the locking plate <NUM> to the base <NUM>. The tab <NUM> can include a clip <NUM>, and the clip <NUM> can be sized and shaped to receive (e.g., capture, hold, grasp, retain, or the like) an edge of the handle receptacle <NUM> (e.g., a portion of the receptacle walls <NUM>, shown in <FIG>).

The tabs <NUM> can be located on two or more sides of the wing <NUM>, for instance a first side <NUM> and a second side <NUM> of the wing <NUM>. Accordingly, the tabs <NUM> can engage with two or more sides of the handle receptacle <NUM>. The tabs <NUM> can be located on the first side <NUM>, the second side <NUM>, and a third side <NUM> of the wing <NUM>. Accordingly, the tabs <NUM> can engage with three sides of the handle receptacle <NUM> (e.g., three sides of the insertion section <NUM>). Optionally, the handle receptacle <NUM> can include a circular or oblong profile, and the tabs <NUM> can engage with the circular or oblong profile of the handle receptacle <NUM>.

The locking plate <NUM> can define engagement features <NUM>. The engagement features <NUM> of the locking plate <NUM> can be located to align with the engagement features <NUM> of the base <NUM> (shown in <FIG>), for instance when the locking plate <NUM> is coupled to the base <NUM>. The locking plate <NUM> can include a first axis <NUM>, and a second axis <NUM> that can be perpendicular to the first axis <NUM>. The locking plate <NUM> can be stiffer along the first axis <NUM> than along the second axis <NUM> (e.g., the locking plate <NUM> can be more flexible along the second axis <NUM> than along the first axis <NUM>). Accordingly, the amount of force necessary to elastically deform (e.g., flex, bend, displace, or the like) the lock body <NUM> along the second axis <NUM> can be less than the amount of force necessary to elastically defonn the lock body <NUM> along the first axis <NUM>. The engagement features <NUM> can be sized, shaped, or located to facilitate the decreased stiffness of the locking plate along the second axis <NUM>.

Configuring the locking plate <NUM> to be stiffer along the first axis <NUM> in comparison to die second axis <NUM> can improve the coupling of the locking plate <NUM> to the overlay base <NUM>. In an example, increasing the stiffness of the locking plate <NUM> along the first axis <NUM> can increase the amount of force necessary to disengage the locking plate <NUM> from the handle receptacle <NUM>. In another example, decreasing the stiffness of the locking plate <NUM> along the second axis <NUM> can decrease the amount of force necessary to disengage the locking plate <NUM> from the handle receptacle <NUM>.

For instance, a user can grasp a first end <NUM> of the locking plate <NUM> and pull on the first end <NUM> to disengage the locking plate <NUM> from the locking receptacle <NUM>. The user can remove the locking plate <NUM> from the base <NUM> by disengaging the locking plate <NUM> from the locking receptacle <NUM>. Configuring the locking plate <NUM> to be less stiff along the second axis <NUM> can facilitate disengaging the locking plate <NUM> from the handle receptacle <NUM>. In an example, the tabs <NUM> can be located on the sides <NUM>, <NUM> of the wing <NUM>, and the tabs <NUM> (or the clip <NUM>) can act as a fulcrum. Pulling on the first end <NUM> can disengage the clips <NUM> from the handle receptacle <NUM>, for instance to help allow the locking plate <NUM> to be removed from the base <NUM>. Configuring the locking plate <NUM> to be less stiff along the second axis <NUM> can improve the amount of leverage a user has to disengage the locking plate <NUM> from the handle receptacle <NUM> (e.g., decrease user effort to disengage the locking plate <NUM> from the handle receptacle <NUM>).

The clip <NUM> can be used as a pivot point the stabilized the release of the tabs <NUM> from the handle receptacle <NUM>. For example, a user can pull on the first end <NUM>, and a lip <NUM> of the locking plate <NUM> can engage with the base <NUM>. Adjusting the dimension between the clip <NUM> and the lip <NUM> can adjust the amount of force necessary to disengage the locking plate <NUM> from the handle receptacle <NUM>.

In another example, the tabs <NUM> can be located on the side <NUM> of the wing <NUM>. Locating the tabs <NUM> on the side <NUM> can increase the amount of force necessary to disengage the locking plate <NUM> from the handle receptacle <NUM>, for instance because of reduced leverage being generated by a force applied to the first end <NUM>. Accordingly, the amount of force necessary to disengage the locking plate <NUM> from the handle receptacle <NUM> can be tuned depending upon the location of the tabs <NUM> (or the clips <NUM>). For example, the amount of effort needed by a user to disengage the locking plate <NUM> from the handle receptacle can be tuned by varying the location of the tabs <NUM> (or the clips <NUM>).

Additionally, the location of the tabs <NUM> can be adjusted to prevent unintended removal of the locking plate <NUM> from the base <NUM>. In an example, placing the tabs <NUM> on the sides <NUM>, <NUM> of the wing <NUM> can inhibit disengaging the locking plate <NUM> by pulling on the wing <NUM>. Further, locating the tabs <NUM> on the sides <NUM>, <NUM> can inhibit disengaging the locking plate <NUM> by pulling on a second end <NUM> of the locking plate <NUM>. Still further, locating the tabs <NUM> on the sides <NUM>, <NUM> can allow the locking plate <NUM> to disengage from the handle receptacle <NUM>, for instance by a user pulling on the first end <NUM> of the locking plate <NUM>. Accordingly, locating the tabs <NUM> on the sides <NUM>, <NUM> can facilitate disengaging the locking plate <NUM> from the handle receptacle in a single direction (e.g., by pulling on the first end <NUM>).

<FIG> is a top view of the overlay system <NUM> of <FIG>. As described herein, the handle <NUM> can be attached to the base <NUM>, for instance by engaging the handle <NUM> with the handle receptacle <NUM>. Additionally, the locking plate <NUM> can be engaged with the handle receptacle <NUM> (also shown in <FIG> and <FIG>) to couple the locking plate <NUM> to the overlay base <NUM>. Further, the locking plate <NUM> can help secure the handle <NUM> to the base <NUM>, for instance by preventing the translation of the handle <NUM> with respect to the handle receptacle <NUM>. Still further, the engagement features <NUM> of the locking plate <NUM> can align with the engagement features <NUM> of the base <NUM> (shown in <FIG>) when the locking plate <NUM> is coupled to the base <NUM>.

In some examples, the wing <NUM> can cover a portion of the handle receptacle <NUM> (e.g., the insertion section <NUM>), and accordingly prevent the translation of the handle <NUM> with respect to the handle receptacle <NUM>. Additionally, the wing <NUM> can be sized and shaped to be located between the handle and the guide <NUM> when the locking plate <NUM> is coupled to the base <NUM>. Further, the locking plate <NUM> can be sized and shaped to extend into a region between the guides <NUM>. The locking plate <NUM> can engage with the ultrasound probe holder <NUM>, for instance to inhibit the ultrasound probe holder <NUM> from disengaging from the guides <NUM>. Still further, the locking plate <NUM> can inhibit the ultrasound probe holder <NUM> from interacting with a user of the system <NUM>, for instance when a user is grasping the handle <NUM>. Accordingly, the locking plate <NUM> can be configured to stop the translation of the ultrasound probe holder <NUM> with respect to the guides <NUM>.

<FIG> is a flowchart diagram of a method for using a patient therapy couch. In describing the method <NUM>, reference is made to one or more components, features, functions and operations previously described herein. Where convenient, reference is made to the components, features, operations and the like with reference numerals. The reference numerals provided are exemplary and are not exclusive: For instance, components, features, functions, operations and the like described in the method <NUM> include, but are not limited to, the corresponding numbered elements provided herein and other corresponding elements described herein (both numbered and unnumbered) as well as their equivalents.

At <NUM>, a handle can be user-attached, or user-detached, to a base <NUM>. An end <NUM> of the handle <NUM> can be inserted into (or removed out of) an insertion section <NUM> of a handle receptacle <NUM> of the base <NUM>. The handle end <NUM> can be translated into (or out of) a capture section <NUM> of the handle receptacle <NUM> of the base <NUM>.

Several options for the method <NUM> follow. The base <NUM> can be located on the couch. The base <NUM> can be lifted with the handle <NUM>. A locking plate <NUM> can be located proximate to the base <NUM>. The locking plate <NUM> can be engaged with the handle receptacle <NUM>. The locking plate <NUM> can have a lock body <NUM> sized and shaped to cover the insertion section <NUM> of the handle receptacle <NUM>. The handle <NUM> can include a channel <NUM> optionally having a wedge-shaped profile. The handle receptacle <NUM> can have a tapered profile that corresponds to the wedge-shaped profile of the channel <NUM>.

User-detaching of the handle <NUM> from the base <NUM> can include disengaging the locking plate <NUM> from the handle receptacle <NUM>. The handle <NUM> can be translated from the capture section <NUM> to the insertion section <NUM>. The handle <NUM> can be removed from the handle receptacle <NUM>.

The above description includes references to the accompanying drawings, which form a part of the detailed description.

" Also, in the following claims, the terms "including" and "comprising" are open-ended,. that is, a system, device, article, composition, formulation, or process that includes elements in addition to those listed after such a term in a claim are still deemed to fall within the scope of that claim.

Geometric terms, such as "parallel", "perpendicular", "round", or "square", are not intended to require absolute mathematical precision, unless the context indicates otherwise. Instead, such geometric terms allow for variations due to manufacturing or equivalent functions. For example, if an element is described as "round" or "generally round," a component that is not precisely circular (e.g., one that is slightly oblong or is a many-sided polygon) is still encompassed by this description.

Claim 1:
An overlay system (<NUM>) for providing a movable interface between an ultrasound probe holder (<NUM>) and a couch for radiotherapy, the overlay system comprising:
a substantially planar overlay base (<NUM>) including a top side, the base defining a handle receptacle (<NUM>) including a handle capture section having a tapered profile;
a centrally located elongated guide (<NUM>) extending longitudinally along the top side of the base to guide translational movement of the ultrasound probe holder along a longitudinal axis of the base;
a handle (<NUM>) configured to be attached and detached, by a user without requiring using a tool, with the handle receptacle of the base, wherein:
the handle defines a channel having a wedge profile that corresponds to the tapered profile of the handle receptacle;
engagement of the channel to the capture section of the handle receptacle attaches the handle to the base.