Electromagnetic interface mount for a radiation machine

Abstract

An interface mount (200) provides one or more attachment points (210, 212, 214), each attachment point including an electromagnet (220) operable to generate a magnetic field to hold an accessory (300) including one or more magnetic members (310, 312, 314), thereby allowing the accessory (300) to be received by the interface mount (200).

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to radiation treatment and imaging. In particular, various embodiments are described having electromagnets to receive an interface mount for an accessory of a linear accelerator. BACKGROUND

[0002] Interface mounts are used in radiation machines to receive accessories, for example, for modifying or characterizing a beam or quality control during manufacture, testing, or use of the radiation machine. Conventionally, the interface mount is attached externally to a treatment head of the radiation machine and includes a frame or structure that protrudes from the treatment head toward a patient. Slots, pins, and latches are used to receive, align, and secure the accessory to the interface mount. Figure 1 A conventional interface mount 12 attached to a treatment head 14 of a radiation machine 10 is depicted. As shown, the conventional interface mount 12 includes a structure that protrudes from the treatment head 14, reducing the clearance between the treatment head 14 and a patient to be treated.

[0003] In some cases, it is desirable to increase the clearance between the treatment head and the patient. The target to be irradiated can be located inside a large patient; it can be necessary to increase the clearance to position the target at an isocenter of the radiation machine. For advanced treatments, such as volumetric intensity modulated arc therapy (VMAT, RapidArc®), intensity modulated radiation therapy (IMRT), stereotactic radiosurgery (SRS), and stereotactic body radiation therapy (SBRT), it can be necessary to rotate the gantry during dose delivery. The increased clearance helps to ensure that collisions are avoided, treatment planning is facilitated, or advanced treatments are implemented.

[0004] Accordingly, there is a general need for improved methods and apparatus for mounting accessories. It would be desirable to have an interface mount that provides increased patient clearance. It would be desirable to provide an interface mount that allows for simple and safe attachment and removal of accessories to and from a radiation machine. SUMMARY

[0005] One embodiment of the present disclosure provides an apparatus comprising an accessory and an interface mount for attachment to a radiation machine. The interface mount provides at least one attachment point comprising an electromagnet operable to generate a magnetic field. The accessory comprises at least one member capable of being retained by the magnetic field generated by the electromagnet, thereby allowing the accessory to be received by the radiation machine.

[0006] An example interface mount includes three attachment "nesting" or attachment points. Each attachment point can contain an electromagnet to provide holding force for a corresponding piece on an accessory, which can be made of ferromagnetic material in the shape of, for example, a "puck." In the event of a power failure, each attachment point can have a safety latch that mechanically engages the accessory and holds it in place. The latch can be spring loaded and can be moved to an unlocked position by a solenoid. The latch can have a small ramp to allow attachment of the accessory without the need to power the solenoid to move the latch to the unlocked position. The latch position can be monitored by a proximity sensor that indicates the latched and unlocked state. Each attachment point can also contain a second proximity sensor to detect the presence or correct seating of the accessory. The electromagnet can be suspended on a spherical bearing to provide good planar alignment with the accessory. The bolts that hold the electromagnet to the housing can be hollow and the head of the bolt can have features for precise accessory alignment, such as X-Y positioning, timing, and / or Z leveling. A multi-color LED can be disposed within the bolt to emit light to the accessory, where the light shines onto a diffuser that is visible to the user as a status indicator of the machine and / or accessory. A connector can be provided near one or more of the attachment points to connect with an attached accessory for passing communication signals and ID codes. The ID code of the accessory can be passed to the system via an ID reader module containing a sensor. The ID code of the accessory can be in a separate module attached to the accessory and can include, for example, a permanent magnet arranged in a specific pattern.

[0007] This summary is intended to introduce selected embodiments, not intended to determine the key or essential features of the claimed subject matter, nor to limit the scope of what the claimed subject matter is intended to cover. The selected embodiments are presented in a simplified form only as an aid to understanding the application, and are not intended to limit the scope of the application. Other aspects and embodiments of the disclosure are described in the detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0008] These and various other features and advantages of the present disclosure will be better understood and appreciated, as the same becomes better clarified with regard to the following detailed description and the accompanying drawings, wherein:

[0009] Figure 1 is a side partial view of a radiation machine including a conventional interface mount.

[0010] Figure 2A is a side partial view of a radiation machine including an interface mount according to embodiments of the present disclosure.

[0011] Figure 2B is a bottom isometric partial view of a radiation machine of Figure 2A emphasizing an example interface mount of the present disclosure.

[0012] Figure 3 Bottom view of an example interface mount according to embodiments of the present disclosure.

[0013] Figure 4 Top isometric view of an example accessory according to embodiments of the present disclosure.

[0014] Figure 5 Top cross-sectional partial view of an example interface mount according to the present disclosure, emphasizing some parts at the attachment point.

[0015] Figure 6 Cross-sectional view showing some parts and the spatial relationship of parts at the attachment point.

[0016] Figure 7 Bottom cross-sectional partial view of an example interface mount of the present disclosure, emphasizing the attachment point and safety lock.

[0017] Figure 8 Bottom cross-sectional partial view of an example interface mount of the present disclosure, emphasizing the attachment point and safety lock.

[0018] Figure 9 Top isometric partial view of an example accessory according to embodiments of the present disclosure.

[0019] Figure 10 Cross-sectional view showing the energized electromagnet at the attachment point holding a magnetic member on an example accessory according to embodiments of the present disclosure.

[0020] Figures 11A-11B Top cross-sectional partial view of an example interface mount of the present disclosure, emphasizing the safety lock at the attachment point.

[0021] Figures 12A-12B Bottom partial view of an example interface mount of the present disclosure, emphasizing the safety lock at the attachment point.

[0022] Figure 13 Cross-sectional view, emphasizing the spherical bearing in the electromagnet and the bolt that secures the electromagnet to the housing.

[0023] Figure 14 Example head features of an example bolt used to position an accessory are shown.

[0024] Figure 15 Cross-sectional view showing an example bolt head received in a counterbore on an example magnetic member on an example accessory. DETAILED DESCRIPTION

[0025] With reference to FIGS. 2-15, various embodiments of interface mounts and radiation machines including the interface mounts are described, where like reference numerals indicate like parts. Generally, the example interface mounts include one or more electromagnets to hold an accessory. The use of electromagnets eliminates the need for a frame or support structure that protrudes to an isocenter of a radiation machine. In this way, maximum clearance between a patient and the radiation machine can be achieved. Attachment of an accessory to an interface mount is simple and automatic by bringing the accessory close to one or more attachment points in the interface mount. Removal of the accessory can be initiated by pressing one or more switches integrated in the accessory. In the event of a power failure, a safety latch can mechanically hold the accessory in place. Alignment of the accessory can be facilitated by using spherical bearings and electromagnet set screws, monitored by sensors and indicated by multi-color LEDs.

[0026] Figures 2A-2B An example radiation machine 100 in which various embodiments of the present disclosure can be implemented is depicted. It should be noted that although embodiments of the interface mount are described in connection with a radiation therapy machine, the interface mount of the present disclosure can also be implemented in a diagnostic system, a simulation system, a research and development system, or any other suitable radiation system. Embodiments of the present disclosure are particularly useful in systems adapted to perform intensity modulated radiation therapy (IMRT) or volumetric modulated arc therapy (VMAT), stereotactic radiation therapy (SRS), or stereotactic body radiation therapy (SBRT). Embodiments of the present disclosure can also be implemented in any system that includes two devices or subassemblies that need to be mated for a short or long period of time.

[0027] Reference is made to Figures 2A-2B The radiation machine 100 includes a gantry 102 that houses a radiation source (not shown). The radiation source can be a source that produces or emits photons, protons, heavy ions, electrons, or other types of radiation. For example, the radiation machine 100 can include a linear accelerator that includes a metal target configured to produce x-rays upon impact by electrons. The radiation machine 100 can also include various devices or components for shaping, modifying, and monitoring properties of the radiation produced by the radiation source. For example, various collimating devices such as collimating blocks and a multi-leaf collimator can be disposed in a treatment head 104 to define or modify the shape, size, and / or intensity of the radiation produced by the radiation source. The gantry 102 can be a C-arm gantry, a ring gantry, or a robotic arm gantry, and can be rotatable about one or more rotational axes. Operation of the radiation machine 100, including rotation of the gantry and operation of the various devices inside the gantry and the treatment head, can be controlled by a control system (not shown).

[0028] Reference is made to Figures 2A-2BThe radiation machine 100 includes an interface mount 200. The interface mount 200 is used to receive accessories for the processing head 104 of the radiation machine 100 for various applications. As used herein, the term "accessory" refers to an assembly or sub-assembly including, for example, a component for shaping or modifying a beam, or a device or tool for characterizing a beam, detecting beam alignment, or for quality control during use, testing, or manufacturing of the radiation machine. Example components for shaping or modifying a beam include, but are not limited to, a collimator such as an SRS cone, an electron applicator, a beam filter, etc. Example devices or tools for quality control include, but are not limited to, an ionization chamber (IC) profiler, a front end indicator, etc. According to embodiments of the present disclosure, an accessory can include one or more members that can be held by one or more electromagnets in the interface mount, for example one or more members constructed of a magnetic material, as will be described in greater detail below. Figure 4 An example accessory 300 carrying a beam shaping component 301 (e.g., an SRS cone) is depicted in accordance with embodiments of the present disclosure.

[0029] Referring to Figures 2A-2B , the interface mount 200 can include a plate or frame 202 having an opening 203 for passage of a radiation beam and attachment points 210, 212, 214 for holding an accessory. Three attachment points are shown in Figure 2B for illustrative purposes. One of ordinary skill in the art will appreciate that fewer than or more than three attachment points can be used to perform the functions of the interface mount described in the present disclosure. In some cases, only one attachment point in the interface mount is sufficient. The plate 202 of the interface mount 200 can be attached to the radiation machine 100 as an integral part of the processing head 104. For example, the plate 202 of the interface mount 200 can further serve as a support frame for a multi-leaf collimator inside the processing head 104. Alternatively, the interface mount 200 including the plate 202 and the parts on the plate can be attached to the processing head using other suitable means such as bolts, fasteners, etc. Once the interface mount 200 is installed, there is no need for components or structures protruding from the processing head 104 to receive an accessory, as shown better in Figure 2A . In this way, maximum or increased clearance between the processing head 104 of the radiation machine 100 and a patient can be achieved with the interface mount 200 of the present disclosure.

[0030] Figure 3 A bottom view of an example interface mount 200 of the present disclosure. Figure 4 An example interface mount 200 of the present disclosure. Figure 3top isometric view of an example accessory 300 of the present disclosure received by an interface mount 200. As shown, the example interface mount 200 includes a plurality of attachment nests or attachment points 210, 212, 214. Correspondingly, the example accessory 300 includes a plurality of members 310, 312, 314 that are to be received in or held by the attachment points 210-214 in the interface mount 200. According to embodiments of the present disclosure, an attachment point, for example 214, in the interface mount 200 includes an electromagnet 220 operable to generate a magnetic field. The example accessory 300 includes a member, for example 314, that can be held by the magnetic field generated by the electromagnet 220. A safety lock 230 can be provided at the attachment point 214 to mechanically hold the accessory 300 in the event of a power failure. The safety lock 230 can include a solenoid 232 that operates a safety latch 234. A first sensor, for example a proximity sensor 240, can be provided at the attachment point 214 to monitor the status of the safety latch 234, and a second sensor, for example a proximity sensor 242, can be provided to monitor the presence or alignment of the accessory 300 (see also Figure 6 , Figures 11A-11B and Figure 13 ). A multi-color LED 244 can be provided in the attachment point 214 to indicate accessory alignment or status of the machine. The electromagnet 220, safety lock 230, proximity sensors 240, 242, and other parts at the attachment points 210-214 will be described in more detail below in connection with other figures. In Figures 3-4 , three attachment points 210-214 in the interface mount 200 and three magnetic members 310-314 on the accessory 300 are shown. According to embodiments of the present disclosure, at each of the attachment points 310-314, an electromagnet 220, a safety lock 230, a first proximity sensor 240, and a second proximity sensor 242 can be provided. In Figure 3 and Figure 4 , reference number 204 represents an ID reader module optionally provided on the interface mount 200 to detect an ID code module or identification 304 optionally provided on the accessory 300, which will be described further below. Reference number 206 represents a connector on the interface mount 200 for connection with a connector 306 on the attached accessory 300 to pass communication signals and ID codes.

[0031] Figure 5 is a top cutaway partial view of an example interface mount 200 of the present disclosure, emphasizing some parts at an attachment point 210. As shown, the electromagnet 220 can be supported in a housing 221 mounted on the interface plate 202. A spherical bearing 250 and a bolt or elongated member 252 can be used to support and secure the electromagnet 220 to the housing 221, which will be described in more detail below. Figure 6To more clearly show the cross-sectional view of the electromagnet 220 and the spatial relationship between the electromagnet 220 and some other parts at the attachment point 210, these other parts include the solenoid 232, the safety latch 234, a first sensor 240 (e.g., a proximity sensor) for monitoring the status of the safety latch 234, a second sensor 242 (e.g., a proximity sensor) for monitoring the accessory 300, and the electrical connector 206. Figure 7 To more clearly show the bottom cross-sectional view of the attachment point 210 and the safety lock 230. As shown, the electromagnet 220 is recessed in a housing 221 that includes a floor that is substantially flush with the interface plate 202. The parts of the safety lock 230, including the solenoid 232, the safety latch 234, and the drive member 236 that couples the solenoid 232 and the safety latch 234, are supported or housed in the housing 221 above the interface plate 202. Once installed, no parts protrude from the housing 221, allowing the maximum clearance between the treatment head and the patient to be achieved. Figure 8 To more clearly show the bottom cross-sectional view of the attachment point 210 and the safety lock 230. As shown, the electromagnet 220 is recessed in a housing 221 that includes a floor that is substantially flush with the interface plate 202. The parts of the safety lock 230, including the solenoid 232, the safety latch 234, and the drive member 236 that couples the solenoid 232 and the safety latch 234, are supported or housed in the housing 221 above the interface plate 202. Once installed, no parts protrude from the housing 221, allowing the maximum clearance between the treatment head and the patient to be achieved.

[0032] Reference is now made to Figures 9-10 According to embodiments of the present disclosure, at least one attachment point 210 in the interface mount 200 includes an electromagnet 220 operable to generate a magnetic field. The accessory 300 includes at least one member 310 that can be held by the magnetic field generated by the electromagnet 220, allowing the accessory 300 to be attracted or received by the interface mount 200. Electromagnets are known in the art. Simply stated, an electromagnet generates a magnetic field through an electric current. The electromagnet can include a coil of wire wound around a core of iron, steel, or other metal. When an electric current flows through the wire, a magnetic field is generated, creating a holding force to attract members made of magnetic material. When the electric current is cut off, the magnetic field is removed, allowing the member of magnetic material to be released from the electromagnet.

[0033] Reference is still made to Figures 9-10The example member 310 on the accessory 300 can be made of a magnetic material. In this disclosure, the term "magnetic member" can be used to refer to a member made of a magnetic material. Suitable magnetic materials include, but are not limited to, ferromagnetic materials, ferrimagnetic materials, paramagnetic materials, diamagnetic materials, and antiferromagnetic materials. Suitable ferromagnetic materials include, but are not limited to, materials including iron, nickel, cobalt, and alloys thereof. The magnetic member 310 can be configured in various sizes and shapes. For example, the magnetic member 310 can include a ring-shaped portion in the shape of, for example, a "disc," for engagement with the electromagnet 220, and a bottom portion configured to be secured to the plate 302 by suitable means such as a flange, fastener, bolt, or the like. The magnetic member 310 can include a recess below the ring-shaped portion to allow the safety latch 234 to mechanically engage and hold the magnetic member 310, thereby locking the accessory 300 in the event of a power failure. The peripheral side surface between the top surface of the ring-shaped portion and the recess of the magnetic member 310 can be rounded or curved to facilitate pushing against the ramp 235 on the safety latch 234 when bringing the magnetic member 310 close to the electromagnet 220, which will be described further below. The magnetic member 310 can be provided with a counterbore 316 in the ring-shaped portion configured to accommodate the end 253 of the elongated member 252 supporting the electromagnet 220. The magnetic member 310 can also include a recess 318 in the bottom portion to accommodate a light diffuser 320 for diffusing light emitted from the multi-color LED 244 disposed in the elongated member 252, which will be described in more detail below.

[0034] Still referring to Figures 9-10 A pin member 322 can be disposed proximate the magnetic member 310. The pin member 322 can be made of a material that is detectable by the proximity sensor 242 at the attachment point 210 in the interface mount 200 Figure 3 and Figure 6) detection, so that the presence and alignment of the accessory 300 can be detected. Preferably, a pin member 322 is provided adjacent each magnetic member 310-314 to ensure accurate detection of accessory alignment. The accessory 300 can include an ID code module or identifier 304 to provide identification information of the accessory. The ID code can be detected by an ID reader 204 on the interface mount 200, which can then transmit the ID code to a control system, which will be described further below. The accessory 300 can also include one or two handles 305 to assist a user in positioning the accessory 300 proximate to the interface mount 200, and removing the accessory 300 from the interface mount 200. One or two switches 306, such as momentary switches, can be integrated in the handles 305 to control power to the solenoid 232 of the safety lock 230, thereby allowing the accessory 300 to be released from the electromagnet 220, which will be described in greater detail below. Alternatively, the switch(es) 306 can be provided at other locations on the accessory or interface mount. The accessory plate 302 can have cutouts 303 to reduce the weight of the accessory 300.

[0035] Referring now to Figures 11A-11B and Figures 12A-12B , the interface mount 200 can include at least one safety lock 230 at the attachment points, which is operable to lock an accessory 300 received by the interface mount 200. Preferably, a safety lock 230 is provided at each attachment point 210-214. According to embodiments of the present disclosure, the at least one safety lock 230 includes a spring-loaded latch member 234 that is movable relative to a magnetic member on the accessory between a latched position and an unlatched position. As shown in Figures 11A-11B , an example safety lock 230 includes a latch member 234, a drive member 236 coupled to the latch member 234, a spring 238 coupled to the drive member 236, and a solenoid 232 operable to compress and release the spring 238. The solenoid 232 is operable to move the drive member 236 by compressing and releasing the spring 238. Movement or travel of the drive member 236 in turn moves, e.g., translates or rotates, the latch member 234, thereby allowing the latch member 234 to be positioned at the latched and unlatched positions. See also Figures 7-8 . Simply stated, a solenoid is an electromagnetic device that converts electrical energy into mechanical force or motion. A solenoid generally includes a wire coil wound in a spiral and a plunger or ferromagnetic actuator that slides "into" or "out of" the coil body. When the coil is energized with electrical current, a magnetic field is created that causes the plunger to slide "into" or "out of" the coil body, depending on the configuration of the solenoid. When the solenoid is de-energized, the magnetic field is removed, thereby allowing the plunger to slide "into" or "out of" the coil body. Figure 11A A latched state of the safety lock 230 or latched position of the latch member 234 is shown. Figure 11B An unlatched state of the safety lock 230 or unlatched position of the latch member 234 is shown.Figures 12A-12B The bottom view is shown in the locked state and the unlocked state, respectively. In alternative embodiments, the safety lock 230 can include a servo motor that is operable to move, e.g., translate or rotate, the latch member 234 between the locked position and the unlocked position.

[0036] According to embodiments of the present disclosure, the safety lock 230 can be configured such that, when the solenoid 232 is not energized, the safety lock 230 is in the locked state or the latch member 234 is in the locked position, and when the solenoid 232 is energized, the safety lock 230 is in the unlocked state or the latch member 234 is in the unlocked position. In such a configuration, when a power failure occurs, the safety lock 230 remains in the locked state to mechanically retain the accessory 300 from falling off the unenergized electromagnet 220. In normal operation, to remove an installed accessory 300 from the electromagnet 220, the solenoid 232 can be powered to allow the safety lock 230 to open to remove the accessory 300 released by the electromagnet 220. In the initial phase of operation, the safety lock 230 can be set in the locked state, but the user can bring the accessory 300 close to the interface mount 200 by pushing against the ramp 235 on the safety latch 234, as better shown in Figure 10 , without the need to power the solenoid 232 to open the safety lock 230. According to embodiments of the present disclosure, a sensor 240, e.g., a proximity sensor, can be provided in the interface mount 200 to detect the state of the safety lock 230, e.g., by sensing the position of the latch member 234, and transmit a signal indicative of the state of the safety lock to the control system.

[0037] Referring to Figures 13-14 , according to embodiments of the present disclosure, the electromagnet 220 can be supported by a bolt or elongated member 252 and a spherical bearing 250. The spherical bearing 250 can be disposed in a passage of the electromagnet 220 and housed on the elongated member 252, allowing the electromagnet 220 to be suspended and tilted when housing the accessory 300, thereby providing good planar alignment with the accessory 300. The elongated member 252 can be coupled to the electromagnet 220, e.g., at the bottom of the electromagnet 220, and secured to the housing 221 by any suitable means, e.g., threads, nuts, fasteners, etc. (see also Figure 5 ). The elongated member 252 includes an end portion 253 configured to be housed in a counterbore 316 in the magnetic member 310-314 of the accessory 300, as better shown in Figures 9-10 . The end portion 253 of the elongated member 252 and the counterbore 316 of the magnetic member 310-314 can have features that assist in positioning, leveling, or timing the accessory 300 during accessory installation. Figure 14Example features that can provide for the end 253 of the elongate members 252 are shown. In certain embodiments, the interface mount 200 can include a plurality, e.g., three, attachment points 210-214, each including an electromagnet 220. The plurality, e.g., three, electromagnets 220 can be supported by a plurality, e.g., three, elongate members 252 and three spherical bearings 250, respectively. The ends 253 of the three elongate members 252 can have different features, e.g., one end has features for X-Y positioning, one end has features for timing, and one end has features for Z-leveling, as shown. Figure 14 The counterbores 316 in the plurality, e.g., three, magnetic members 310-314 on the accessory 300 can be provided with corresponding features. Collectively, the features on the ends 253 of the three elongate members 252 and in the counterbores 316 of the three magnetic members 310-314 provide for precise positioning, leveling, and timing. Figure 15 A cross-sectional view is shown to illustrate example bolt heads 253a, 253b, 253c housed in the counterbores 316a, 316b, 316c of the magnetic members 310, 312, 314 on the accessory 300. As shown, the bolt head 253a and the counterbores 316a in the magnetic member 310 can be configured to provide proper Z-leveling. The bolt head 253b and the counterbores 316b in the magnetic member 312 can be configured to provide proper timing. As an example, the bolt head 253b can be provided with a diamond pin-like feature, and the counterbores 316b in the magnetic member 312 can be provided with a corresponding slot feature, such that when the bolt head 253b is properly aligned and tightly fitted with the counterbores 316b in the magnetic member 312, the clockwise or counterclockwise rotation of the accessory 300 is constrained. The bolt head 253c and the counterbores 316c in the magnetic member 314 can be configured to provide proper X-Y positioning. For example, the bolt head 253c can be provided with a plurality of pin-like features, and the counterbores 316c in the magnetic member 314 can be provided with a corresponding slot feature, such that when the bolt head 253c is properly aligned and tightly fitted with the counterbores 316c in the magnetic member 314, the movement of the accessory 300 in the X-Y direction is constrained. A sensor 242, e.g., a proximity sensor, can be provided at the attachment point, or preferably at each of the plurality of attachment points 210-214, to monitor the accessory alignment. The pin member 322 can be provided adjacent to the magnetic members on the accessory, or preferably immediately adjacent to each of the plurality of magnetic members 310-314 on the accessory 300, to be detected by one or more sensors 242 in the interface mount 200 for precise detection of the accessory alignment.

[0038] Still referring to Figures 13-14The elongated member 252 or at least a portion of the elongated member 252 can be hollow or provided with a channel. Light sources such as multi-color LEDs 244 can be provided in the channel of the elongated member 252 to emit light indicating the attachment alignment status. For example, green light can be used to indicate correct attachment alignment, red light to indicate misalignment, etc. Light diffusers 320 (see Figure 10 ) provided in the magnetic members 310-314 can diffuse the light emitted by the multi-color LEDs 244, allowing the user to more easily observe the indicator lights.

[0039] Returning to Figures 3-4 , according to embodiments of the present disclosure, the interface mount 200 can include a detector 204 for detecting an identifier 304 provided on the attachment 300. The identifier 304 provides identification information of the attachment, such as a particular beam shaping or modifying component 301 carried by the attachment, a particular device or tool 301 carried by the attachment for beam characterization or quality control, etc. The identifier 304 on the attachment 300 and the detector 204 on the interface mount 200 allow the control system of the radiation machine 100 to verify that the correct attachment is attached to the interface mount 200 as planned. Upon verifying that the correct attachment is attached, the control can adjust its operation based on the actual attachment attached. If an incorrect attachment is verified to be attached, a warning signal is generated by the control and the interlock system. The identifier 304 can be an ID code module encoded with the identification information of the attachment 300, and the detector 204 can be an ID reader capable of reading the ID code. For example, the identifier 304 can include magnetic elements arranged in a particular pattern (code). The detector 204 can include an array of sensors capable of detecting the electromagnetic field generated by the magnetic elements. As another example, the identifier 304 can include a passive or active transmitter providing an output signal that can be detected by a receiver or sensor 204, such as an ultrasonic sensor, a capacitive sensor, or a camera, e.g., an infrared camera. As another example, the identifier 304 can include a radio frequency identification (RFID) tag that can be detected by an RFID reader 204. As another example, the identifier 304 can include fiducial markers that can be detected by an imaging system 204. The identifier 304 can act as a binary data record, while the detector 204 can act as a binary data reader.

[0040] Various embodiments of an interface mount receiving a linear accelerator attachment are described in connection with FIGS. 2-15. Advantageously, the use of electromagnets maximizes the gap between the treatment head and the patient and simplifies attachment and removal of the attachment. The safety lock ensures that the attachment remains locked in case of power failure. The spherical bearing facilitates attachment alignment, which can be monitored by a sensor and indicated by a multi-color LED.

[0041] Reference is made to Figures 3-4An example operation or use of the example interface mount 200 and accessory 300 of the present disclosure will now be described. Initially, the safety latch 230 at the attachment points 210-214 in the interface mount 200 can be set so that the latch 234 is initially in the locked position. The bevel on the safety latch 234 allows the user to push the accessory 300 against the spring latch 234 and seat the accessory 300 at the attachment points 210-214 without energizing the solenoid 232. The action of the latch changing can be detected by the latch proximity sensor or first sensor 240, sending a signal to the control system. Depending on the combination of signals from the latch sensors 240, the control system can send a signal to energize the electromagnet 220 in the attachment points 210-214. In certain embodiments, a combination of signals from at least two proximity sensors 240 is used to energize the electromagnet 220 to avoid the situation where the safety latch is accidentally pushed by a user or tool. In some embodiments, a combination of signals from three or all of the latch sensors 240 is used to energize the electromagnet 220.

[0042] The installation sensor or second sensor 242 provides a signal of the success or failure of the installation depending on whether precise accessory alignment is achieved. The controller sends a signal to the multi-color LED 244 to indicate the installation status. The LED 244 can emit a green light indicating successful installation of the accessory, which then extinguishes after a few seconds. In the case of a failed installation of the accessory, the LED 244 can emit a red light, which should remain lit as long as the accessory 300 is attached or held to the interface mount 200. If the status of any of the installation sensor 242 and the latch sensors 240 changes, the red indicator light of the LED 244 can be lit, in which case operation of the radiological machine 100 should be suspended.

[0043] To remove the accessory 300 after successful installation or use, the user can simultaneously press the momentary switch 306, which can be integrated in the handle 305 of the accessory 300. This will energize the solenoid 232, moving the safety latch 234 to the unlocked position. The latch proximity sensor or first sensor 240 can detect the change in latch position, and the controller sends a signal to turn off the electromagnet 220. A small pulse of reverse current can be applied to the electromagnet 220 to eliminate any residual magnetism that can continue to hold the accessory 300 attached to the interface mount 200. The accessory 300 can then be removed. The installation proximity sensor or second sensor 242 can detect the absence of the accessory 300, and the controller sends a signal to turn off the power to the solenoid 232, allowing the safety latch 234 to return to the locked position by spring action.

[0044] Various embodiments of devices including interface mounts and accessories have been described with reference to the accompanying drawings. It is noted that some of the drawings can not be drawn to scale. The drawings are intended to be only illustrative, and not exhaustive, of the disclosure. Furthermore, in the drawings and the description, specific details are set forth to provide a thorough understanding of the present disclosure. One skilled in the relevant art will recognize that some of the specific details can not be required to practice the embodiments of the present disclosure. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessary obfuscation of the embodiments of the present disclosure.

[0045] All technical and scientific terms used herein have meanings commonly used in the art unless otherwise specified. As used in the specification and the appended claims, the singular forms “a,” “an” and “the” include plural references unless the context clearly dictates otherwise. The term “or” means “and / or” unless the context clearly dictates otherwise. The terms “first” or “second” are used to differentiate one element from another in describing various similar elements and should not be construed as any particular order unless the context clearly dictates otherwise. In describing relative positions or spatial relationships in conjunction with various embodiments, relative terms such as “upper,” “above,” “top,” “over,” “on,” “below,” “under,” “bottom,” “lower” or similar terms can be used herein for convenience. The use of relative terms should not be construed as implying necessary positioning or orientation of structures or portions thereof in manufacture or use, nor as limiting the scope of the present disclosure.

[0046] Those skilled in the art will appreciate that various other modifications can be made. The inventors contemplate all such or other changes and modifications in the scope of the present disclosure.

Claims

1. An electronic device comprising an interface mount for attachment to a radiological machine and an accessory received by the interface mount, wherein the interface mount comprises at least one attachment point comprising a housing, an electromagnet operable to generate a magnetic field, and an elongate member, the electromagnet is housed by and supports the electromagnet, the electromagnet is recessed in the housing, and the accessory comprises at least one member holdable by the magnetic field.

2. The electronic device of claim 1, wherein the at least one member is comprised of a magnetic material.

3. The electronic device of claim 1 or claim 2, wherein the at least one attachment point further comprises a security lock configured to hold the accessory received by the interface mount.

4. The electronic device of claim 3, wherein the security lock comprises a latching member having at least a locked position and an unlocked position, and a solenoid operable to move the latching member.

5. The electronic device of claim 4, wherein the security lock is configured to set the latching member at the locked position when the solenoid is not energized, and to set the latching member at the unlocked position when the solenoid is energized.

6. The electronic device of claim 5, wherein the latching member of the security lock comprises a ramp configured to allow access to the at least one member of the accessory to the at least one attachment point by pushing against the ramp when the solenoid is not energized.

7. The electronic device of claim 5 or claim 6, further comprising at least one switch operable to power the solenoid to allow removal of the accessory from the at least one attachment point.

8. The electronic device of claim 7, wherein the switch is disposed in a handle of the accessory.

9. The electronic device of claim 4, further comprising at least one first sensor at the at least one attachment point of the interface mount, the at least one first sensor configured to detect the locked position or the unlocked position of the latching member.

10. The electronic device of claim 9, further comprising at least one second sensor at the at least one attachment point of the interface mount, the at least one second sensor configured to detect the presence and / or alignment of the accessory.

11. The electronic device of claim 10, wherein the at least one attachment point further comprises a spherical bearing configured to support the electromagnet, the spherical bearing is disposed in the electromagnet and housed on the elongate member to allow tilting of the electromagnet, the elongate member comprises an end portion configured to be housed in a counterbore in the at least one member of the accessory, the end portion of the elongate member and the counterbore of the at least one member are configured to aid in aligning the accessory.

12. The electronic device of claim 11, wherein at least a portion of the elongate member is hollow and the at least one attachment point further comprises a multi-color LED disposed in the elongate member, the multi-color LED configured to indicate a status of the electronic device.

13. The electronic device of claim 1 or claim 2, wherein the at least one attachment point further comprises a spherical bearing configured to support the electromagnet, the spherical bearing disposed in the electromagnet and housed on the elongate member to allow the electromagnet to tilt.

14. The electronic device of claim 13, wherein the elongate member comprises an end configured to be housed in a counterbore in the at least one member of the accessory, the end of the elongate member and the counterbore of the at least one magnetic member configured to assist in aligning the accessory.

15. The electronic device of claim 14, wherein the at least one attachment point of the interface mount further comprises a second sensor configured to detect a presence of the accessory or the alignment.

16. The electronic device of claim 15, wherein at least a portion of the elongate member is hollow and the at least one attachment point further comprises a multi-color LED disposed in the elongate member, the multi-color LED configured to indicate a status of the device.

17. The electronic device of claim 16, wherein the at least one member of the accessory comprises a diffuser for diffusing light from the multi-color LED through the counterbore.

18. The electronic device of any one of claims 15 to 17, wherein the accessory further comprises at least one pin member adjacent to the at least one member, the at least one pin member detectable by the at least one second sensor to allow the at least one second sensor to determine the presence of the accessory or the alignment.

19. The electronic device of claim 18, wherein the accessory further comprises an identifier to provide a signal indicative of an identity of the accessory, and the device further comprises a detector configured to detect the signal indicative of the identity of the accessory.

20. The electronic device of claim 1 or claim 2, wherein the accessory further comprises: a component configured to shape or modify a property of a beam produced by the radiation machine, or a device configured for quality control of the radiation machine. a component configured to shape or modify a property of a beam produced by the radiation machine, or a device configured for quality control of the radiation machine.

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