Abstract: There is provided a measurement circuit (30) for an x-ray detector (5). The measurement circuit (30) is configured to sample measurement data to generate data points and process the data points before read-out to produce new data points by combining two or more data points which have been acquired at different times such that the number of data points for read-out are less than the number of original data points.

Abstract: Disclosed are methods, systems, apparatuses and computer programs for estimating a measure of the gain and offset of a converter that generates, based on digital settings, reference voltages to be used as thresholds by a comparator in a photon-counting detector in an x-ray imaging system. Steps include selecting a first converter as a reference converter and a second converter as a target converter; assigning different digital settings to the reference converter to generate at least two different reference voltages to be used as thresholds by a comparator associated with the reference converter; and obtaining, based on photon count measurements, the number of photons registered in a photon counter associated with a comparator whose reference voltage is generated by the target converter. Based on the number of photons and the at least two digital settings, an estimate of the gain and offset of the target converter relative the reference converter results.

Abstract: There is provided a method for at least partly determining the orientation of an edge-on x-ray detector with respect to the direction of x-rays from an x-ray source. The method includes obtaining (S1) information from measurements, performed by the x-ray detector, representing the intensity of the x-rays at a minimum of two different relative positions of a phantom in relation to the x-ray detector and the x-ray source, the phantom being situated between the x-ray source and the x-ray detector and designed to embed directional information in the x-ray field when exposed to x-rays. The method also includes determining (S2) at least one parameter associated with the orientation of the x-ray detector with respect to the direction of x-rays based on the obtained information from measurements and a geometrical model of the spatial configuration of the x-ray detector, x-ray source and phantom.

Abstract: Disclosed are methods, systems, apparatuses and computer programs for estimating a measure of the gain and offset of a converter that generates, based on digital settings, reference voltages to be used as thresholds by a comparator in a photon-counting detector in an x-ray imaging system. Steps include selecting a first converter as a reference converter and a second converter as a target converter; assigning different digital settings to the reference converter to generate at least two different reference voltages to be used as thresholds by a comparator associated with the reference converter; and obtaining, based on photon count measurements, the number of photons registered in a photon counter associated with a comparator whose reference voltage is generated by the target converter. Based on the number of photons and the at least two digital settings, an estimate of the gain and offset of the target converter relative the reference converter results.

Abstract: There is provided a method and corresponding system for data acquisition, for Computed Tomography, CT, based on an x-ray imaging system (10) having a detector (12) with a plurality of pixels (13), wherein data sampling is performed with a temporal offset between measurements acquired by adjacent pixels of the detector.

Abstract: A photon-counting detector includes a first subset of detector modules and at least one second subset of detector modules. Each detector module has power-consuming circuitry. Power-consuming circuitry of detector modules in the first subset is configured, in an operational mode in which the detector modules are powered on, to consume a first amount of power. Correspondingly, power-consuming circuitry of detector modules in the at least one second subset is configured, in the operational mode, to consume a second amount of power that is lower than the first amount of power.

Abstract: There is provided an x-ray detector including a number of adjacent detector modules arranged in a configuration having central parts and peripheral parts. The x-ray detector is configured to have higher dose efficiency in the central parts and lower dose efficiency in the peripheral parts.

Abstract: There is provided an arrangement (100) for enabling assessment of scoliosis. The arrangement (100) is configured to obtain at least one x-ray image by means of one or more photon-counting x-ray detectors. The arrangement (100) is further configured to determine at least one characteristic of the spine of a patient having possible scoliosis based on said at least one x-ray image obtained by means of the photon-counting x-ray detector(s) to enable assessment of scoliosis.

Abstract: There is provided a method for at least partly determining the orientation of an edge-on x-ray detector with respect to the direction of x-rays from an x-ray source. The method includes obtaining (S1) information from measurements, performed by the x-ray detector, representing the intensity of the x-rays at a minimum of two different relative positions of a phantom in relation to the x-ray detector and the x-ray source, the phantom being situated between the x-ray source and the x-ray detector and designed to embed directional information in the x-ray field when exposed to x-rays. The method also includes determining (S2) at least one parameter associated with the orientation of the x-ray detector with respect to the direction of x-rays based on the obtained information from measurements and a geometrical model of the spatial configuration of the x-ray detector, x-ray source and phantom.

Abstract: Disclosed is a measurement method performed by a Computed Tomography, CT, system. The CT system includes an x-ray source and an x-ray detector array of photon counting edge-on detectors, wherein each edge-on detector has a number of depth-segments, also referred to as detector elements, arranged at different spatial locations in the direction of incoming x-rays. The method includes to apply a time offset measurement scheme that provides a time offset between measurement periods for at least two different detector elements located at different depths, wherein the time offset is chosen so that at least two measurement periods at least partially overlaps in time. Disclosed is also a corresponding CT system, a control unit for a CT system and a measurement circuit for a CT system. A computer program controlling a CT system is also disclosed. The disclosed technology provides for a higher sampling frequency in the angular direction.

Abstract: Methods of tethering first and second devices to enable the second device to tether to and gain access to a packet data network through the first device. The first device is configured to connect to the packet data network through a first interface. The first and second devices are configured to exchange tethering information, such as through Near Field Communication. With the first device connected to the packet data network using a first interface, the devices are tethered together using a second interface. The second device is then able to access the packet data network through the tethering connection with the first device.

Abstract: A first device determines whether there is an incoming call to the first device or an outbound call from the first device; performs at least two different acts, among a set of acts for monitoring a set of devices that include the first device and a second device; redirecting audio input and output at a first one of input/output (I/O) devices to a second one of the I/O devices based on the monitoring. The I/O devices include the plurality of devices.

Abstract: Methods of tethering first and second devices to enable the second device to tether to and gain access to a packet data network through the first device, The first device is configured to connect to the packet data network through a first interface. The first and second devices are configured to exchange tethering information, such as through Near Field Communication. With the first device connected to the packet data network using a first interface, the devices are tethered together using a second interface. The second device is then able to access the packet data network through the tethering connection with the first device.

Abstract: A first device determines whether there is an incoming call to the first device or an outbound call from the first device; performs at least two different acts, among a set of acts for monitoring a set of devices that include the first device and a second device; redirecting audio input and output at a first one of input/output (I/O) devices to a second one of the I/O devices based on the monitoring. The I/O devices include the plurality of devices.

Abstract: The invention relates to a method for recording a bar code comprising a plurality of base elements. A reading device generates a sequence of partially overlapping images which together reproduce the bar code. Images are analysed to produce information which describes the positions of the base elements in each image. The bar code is then reconstructed by putting together information that has been extracted from the subimages, so that the contents of the bar code can be interpreted. In reconstruction, the position information and the images are used. By using the image information, the putting together process can be made less calculation-intensive. The invention also relates to a corresponding device and a corresponding computer program.

Abstract: The invention relates to a method for recording a bar code comprising a plurality of base elements. A reading device generates a sequence of partially overlapping images which together reproduce the bar code. Images are analysed to produce information which describes the positions of the base elements in each image. The bar code is then reconstructed by putting together information that has been extracted from the subimages, so that the contents of the bar code can be interpreted. In reconstruction, the position information and the images are used. By using the image information, the putting together process can be made less calculation-intensive. The invention also relates to a corresponding device and a corresponding computer program.

Abstract: A method is presented for extracting information from a target area within a two-dimensional graphical object having a plurality of predetermined features with known characteristics in a first plane. An image is read where the object is located in a second plane, which is a priori unknown. A plurality of candidates to the features in the second plane are identified in the image. A transformation matrix for projective mapping between the second and first planes is calculated from the identified feature candidates. The target area of the object is transformed from the second plane into the first plane. Finally, the target area is processed so as to extract the information.