Abstract: One or more example relate, generally, to generating radio frequency (RF) signals. An apparatus may include a signal generator, an amplification stage, and a feedback control loop. The signal generator may generate a pulsed radio frequency (RF) signal at least partially responsive to a digital pulsed waveform defined by one or more commands. The amplification stage may amplify the pulsed RF signal. The feedback control loop may be coupled to the amplification stage to regulate a power level of respective steps of the pulsed RF signal.

Abstract: Scanning systems may include a stator, a rotor supporting at least one radiation source and at least one radiation detector rotatable with the rotor, and a motivator operatively connected to the rotor. The stator, the rotor, the at least one radiation source, and the at least one radiation detector may be located within a housing. A conveyor system may extend through the housing and the rotor. A shielding system including a series of independently movable energy shields sized, shaped, and positioned to at least partially occlude a pathway along which the conveyor system extends may extend from an entrance to the housing, through the rotor, to an exit from the housing. A control system may be configured to cause the shielding system to automatically and dynamically move individual energy shields in response to advancement of one or more objects supported on the conveyor system.

Abstract: One or more techniques and/or systems described herein provide a power coupling device, such as may be used to transfer power between a stator and a rotor. The power coupling device includes a support structure defining an opening. The power coupling device includes a core element including a ferrite material. The core element is received within the opening of the support structure. The core element defines a core channel. The power coupling device includes an inductive element that is received within the core channel. The power coupling device includes an attachment structure removably attached to the support structure. The attachment structure attaches the core element to the support structure. The core element is disposed between the support structure and the attachment structure.

Abstract: A radiation scanning system comprises a radiation detection sub-assembly, and a routing sub-assembly coupled to the radiation detection sub-assembly. The radiation detection sub-assembly comprises a first substrate electrically connected to the radiation detection sub-assembly, and a second substrate electrically connected to the first substrate. The radiation scanning system further comprises one or more radiation shields between the first substrate and the second substrate, and one or more semiconductor dice electrically connected to the second substrate on a side of the second substrate opposite the first substrate. Related radiation detector arrays radiation scanning systems are also disclosed.

Abstract: A radiation scanning system comprises a radiation detector configured to measure at least some radiation. The radiation detector comprises an arc portion exhibiting a semicircular shape, the arc portion comprising a plurality of facets on a side thereof, a detector module coupled to each facet, the detector module comprising a base portion comprising a first substantially planar surface in contact with the facet, a detector unit coupled to a second substantially planar surface of the base portion, the second substantially planar surface parallel with the first substantially planar surface, and a cooling structure in thermal communication with a side of the arc portion opposite the plurality of facets. Related radiation detectors and radiation systems are also disclosed.

Abstract: A system and method are provided for interfacing JESD204-to-PCIe communications. The method transceives JESD204 link layer messages with a JESD204 link layer. The method converts between JESD204 link layer messages and PCIe scrambled messages. The method converts between PCIe scrambled messages and PCIe encoded messages. The PCIe encoded messages are transceived at a JESD clock rate. The PCIe encoded messages transceived at the JESD clock rate are buffered and PCIe encoded messages are then transceived at a PCIe clock rate. The PCIe encoded messages at the PCIe clock rate are transceived with a PCIe physical layer. That is, PCIe encoded messages are either transmitted to the PCIe physical layer at the PCIe clock rate (the transmission path), or received from the PCIe physical layer (at the PCIe clock rate) and buffered (the receive path). The system and method also enable conventional JESD link layer-to-JESD physical layer communications.

Abstract: Among other things, one or more systems and/or techniques for visually augmenting regions within images are provided herein. An image of an object, such as a bag, is segmented to identify an item (e.g., a metal gun barrel). Features of the item are extracted from voxels representing the item within the image (e.g., voxels within a first region), such as a size, shape, density, and orientation of the item. Response to the features of the item matching predefined features of a target item to detect, one or more additional regions are identified, such as a second region proximate to the first region based upon a location of the second region corresponding to where a connected part of the item (e.g., a plastic handle of the gun) is predicted to be located. The one or more regions are visually distinguished within the image from other regions (e.g., colored, highlighted, etc.).

Abstract: Radio frequency (RF) generators are disclosed. A RF generator may include a modulator configured to receive an arbitrary waveform and an RF carrier, and generate a pulsed radio frequency (RF). The arbitrary waveform may be generated via an analog signal generator external to the RF generator. Further, the RF generator may include an amplification stage configured to amplify the pulsed RF signal. RF generation systems and methods of generating a pulsed RF signal also disclosed.

Abstract: Among other things, one or more techniques and/or systems for generating a three-dimensional combined image is provided. A three-dimensional test image of a test item is combined with a three-dimensional article image of an article that is undergoing a radiation examination to generate the three-dimensional combined image. A first selection region of the three-dimensional article image is selected. The three-dimensional test image of the test item is inserted within the first selection region. Although the test item is not actually comprised within the article under examination, the three-dimensional combined image is intended to cause the test item to appear to be comprised within the article.

Abstract: Radio frequency (RF) generators are disclosed. A RF generator may include an analog signal generator configured to generate a pulsed analog signal responsive to a digital pulsed waveform defined by one or more commands. The RF generator may also include a modulator configured to generate a pulsed radio frequency (RF) signal by modulating an RF carrier using the pulsed analog signal as a modulating signal. Further, the RF generator may include an amplification stage configured to amplify the pulsed RF signal output by the modulator. RF generation systems and methods of generating a pulsed RF signal also disclosed.

Abstract: Scanning systems for performing computed tomography scanning may include a stator, a rotor supporting at least one radiation source and at least one radiation detector rotatable with the rotor, and a rotator operatively connected to the rotor to rotate the rotor relative to the stator. A conveyor system may include a respective conveyor extending through the rotor of the scanning system. A control system operatively connected to the scanning system and the conveyor system may be configured to cause the rotor, the respective conveyor, or both to operate at a first operating speed when a wear threshold of the at least one scanning system and the respective conveyor system has not been reached and to cause the rotor, the respective conveyor, or both to operate at a second, lower operating speed when the wear threshold of the at least one scanning system and the respective conveyor system has been reached.

Abstract: A transformer based voltage controlled oscillator (VCO) is provided with a primary resonant circuit having a first inductor connected in parallel with a variable first capacitance circuit. A secondary resonant circuit is formed from a second inductor connected in parallel with a variable second capacitance circuit, and also includes a mode control circuit. The mode control circuit controls the direction of current flow through the secondary resonant circuit inductor. The first and second inductors are inductively mutually coupled in either an even mode or an odd mode in response to the mode control circuit. The VCO supplies a first resonant frequency in response to even mode operation, or a second resonant frequency, greater than the first resonant frequency, responsive to odd mode operation. The VCO may include a first electrically tunable varactor shunted across the first capacitance circuit and a second electrically tunable varactor shunted across the second capacitance circuit.

Abstract: A servo control module for a motion control system with a plurality of individual servo control modules. The servo control module includes a single axis servo drive. The servo control module further includes a set of input pins configured to receive motor state information of motors controlled by single axis servo drives of all of the other of the plurality of servo control modules over a dedicated inter-drive network each servo update cycle. The servo control module further includes a set of output pins configured to transmit the motor state information of a motor controlled by the single axis servo drive and the received state information over the inter-drive network of motors each servo update cycle.

Abstract: A detector array for a radiation system includes a radiation detection sub-assembly, a routing sub-assembly, and an electronics sub-assembly. The routing sub-assembly is disposed between the radiation detection sub-assembly and the electronics sub-assembly and includes one or more layers of shielding material. For example, the routing sub-assembly may include a printed circuit board having embedded therein a shielding material configured to shield the electronics sub-assembly from at least some radiation. In some embodiments, the shielding material defines at least one opening through which a conductive element(s) passes to deliver signals between the radiation detection sub-assembly and the electronics sub-assembly.

Abstract: Among other things, a radiation system is provided. The radiation system includes a stationary unit and a rotating unit that rotates about an axis relative to the stationary unit. A radiation source and a detector array are mounted to the rotating unit. A wheel mechanism at least partially supports the rotating unit and facilitates rotation of the rotating unit relative to the stationary unit. A lift unit is supported by the stationary unit and engages the rotating unit. When the lift unit is in a lowered position, the rotating unit is supported by the wheel mechanism and the lift unit is spaced a distance apart from the rotating unit. When the lift unit is in a raised position, the rotating unit is supported by the lift unit and the rotating unit is spaced a second distance apart from the wheel mechanism.

Abstract: Among other things, one or more techniques and/or systems are described for setting a sampling frequency for a radiation imaging system. The radiation imaging system comprises a rotating gantry configured to rotate a radiation source and a detector array about an object to generate an image(s) of the object. A data acquisition system is configured to sample the detector array as views. One or more flag structures are arranged according to a partial arc segment (e.g., a structure less than a full 360 degree circle). One or more sensors are disposed on one of the rotating gantry or a stationary support about which the rotating gantry rotates. When a sensor encounters a flag structure, a current rotational speed of the rotating gantry is determined. A clock frequency is updated based upon the current rotational speed to establish a sampling frequency for the data acquisition system for sampling the detector array.

Abstract: Among other things, one or more techniques and/or systems are described for creating virtual channels in an imaging modality. The imaging modality comprises a plurality of charge integrating channels. Information yielded from two or more charge integrating channels during a same or similar acquisition view may be combined to yield a virtual channel that represents a portion of the detection surface substantially equivalent to an area comprised by the two or more charge integrating channels. In one embodiment, within a same acquisition view, some virtual channels may comprise a different number of charge integrating channels than other virtual channels. Also, different sets of virtual channels may be created for a same acquisition view to produce different images from a single set of data, for example, where there may be overlap between virtual channels such that the same charge integrating channel is comprised in more than one virtual channel.

Abstract: Among other things, computed tomography (CT) systems and/or techniques for generating projections images of an object(s) under examination via a CT system are provided. The projection images of the object may represent a projection of the entire object or merely a portion of the object, such as a slice of the object. A surface about which the projection image is focused is defined and data yielded from a plurality of views of the object is mapped to the surface. In some embodiments, such a mapping comprises mapping data corresponding to a first view and yielded from a first detector cell to a first point on the surface, mapping data corresponding to the first view and yielded from a second detector cell to a second point on the surface, and/or mapping data corresponding to a second view and yielded from the first detector cell to a third point on the surface.

Abstract: Among other things, an anti-scatter collimator is provided including a first layer defining a first retaining member at a first surface. A second layer defines a second retaining member at a first surface that faces the first surface of the first layer. A septum is disposed between the first layer and the second layer and physically contacts the first retaining member and the second retaining member. The first retaining member and the second retaining member maintain a position of the septum relative to the first layer and the second layer. The septum has a third attenuation coefficient that is greater than a first attenuation coefficient of the first layer and a second attenuation coefficient of the second layer. An end support is attached to the first layer and to the second layer. The end support borders an end of the septum.

Abstract: Among other things, an anti-scatter collimator (200) includes a first anti-scatter structure (302) defining a retaining member (432). The retaining member includes a first protruding member having a top surface defining a first plane, and a second protruding member having a second top surface defining a second plane. The second protruding member is spaced apart from the first protruding member to define a groove (434). The retaining member includes a support member extending between the first protruding member and the second protruding member. The support member defines a bottom surface of the groove. The bottom surface of the support member is spaced a distance apart from the first plane and the second plane. A second anti-scatter structure (303) includes a septum disposed within the groove. The first protruding member, the second protruding member, and the support member maintain a position of the septum relative to the first anti-scatter structure.