Abstract: Various methods and systems are provided for a method for nuclear medicine (NM) imaging, comprising, acquiring imaging data with at least two energy windows, pre-processing acquired imaging data to separate distributions of scattered photons and peak photons, performing a main iterative reconstruction to reconstruct a corrected imaging using scatter correction, tailing correction, and/or scatter and tailing correction from distributions of scattered photons and peak photons, and outputting the corrected image.

Abstract: Embodiments enforce user access rights to a data view, by initially generating a replication table of the view. The replication table may include all view data to which any user is entitled. This replication table may be generated during a first database session having a first value for a session variable. Next, a data access control structure is applied to the replication table to produce output comprising a subset of the view data for a specific user. This output may be produced during a second database session having a second value for the session variable. By initially generating the view replication table up front, processing resources are conserved in later stages when access control structures are applied to grant view access rights to particular users. Alternative embodiments may implement access control to data views, through the creation and storage of derived views.

Abstract: Aspiration medical device as well as methods for making and using aspiration medical devices are disclosed. An example aspiration medical device may include a tubular member having a distal end region and defining an inflow orifice adjacent to the distal end region. An aspiration member may be disposed within the tubular member. The aspiration member may have a plurality of axially-spaced fluid jets formed therein.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for executing the operations represented by an asynchronous execution graph. One of the methods includes receiving data characterizing an asynchronous execution graph comprising one or more subgraphs, wherein each subgraph comprises a plurality of nodes connected by edges, the plurality of nodes comprising a source node, one or more processor nodes, and one or more sink nodes; receiving source data from an external system that corresponds to the source node of a first subgraph in the graph; in response, executing the operations represented by the processor nodes in the first subgraph; and executing the operations represented by each sink node in the first subgraph.

Abstract: Embodiments enforce user access rights to a data view, by initially generating a replication table of the view. The replication table may include all view data to which any user is entitled. This replication table may be generated during a first database session having a first value for a session variable. Next, a data access control structure is applied to the replication table to produce output comprising a subset of the view data for a specific user. This output may be produced during a second database session having a second value for the session variable. By initially generating the view replication table up front, processing resources are conserved in later stages when access control structures are applied to grant view access rights to particular users. Alternative embodiments may implement access control to data views, through the creation and storage of derived views.

Abstract: Various methods and systems are provided for scatter correction in nuclear medicine imaging systems. In one embodiment, a method for NM imaging comprises acquiring, with a plurality of detectors, imaging data separated into a high energy window and a low energy window, removing photopeak photons from the imaging data in the low energy window to obtain a corrected scatter distribution, correcting the imaging data based on the corrected scatter distribution, and outputting a scatter-corrected image reconstructed from the corrected imaging data. In this way, fast and accurate scatter correction for CZT-based gamma cameras may be performed, and image quality as well as quantitative accuracy may be increased.

Abstract: Various methods and systems are provided for scatter correction in nuclear medicine imaging systems. In one embodiment, a method for NM imaging comprises acquiring, with a plurality of detectors, imaging data separated into a high energy window and a low energy window, removing photopeak photons from the imaging data in the low energy window to obtain a corrected scatter distribution, correcting the imaging data based on the corrected scatter distribution, and outputting a scatter-corrected image reconstructed from the corrected imaging data. In this way, fast and accurate scatter correction for CZT-based gamma cameras may be performed, and image quality as well as quantitative accuracy may be increased.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for executing the operations represented by an asynchronous execution graph. One of the methods includes receiving data characterizing an asynchronous execution graph comprising one or more subgraphs, wherein each subgraph comprises a plurality of nodes connected by edges, the plurality of nodes comprising a source node, one or more processor nodes, and one or more sink nodes; receiving source data from an external system that corresponds to the source node of a first subgraph in the graph; in response, executing the operations represented by the processor nodes in the first subgraph; and executing the operations represented by each sink node in the first subgraph.

Abstract: Techniques and architectures are disclosed for a gas operating system for a firearm. The system includes a barrel having a bore including a rifled portion. Attached to the barrel is a gas block. Located distally of the rifled portion of the bore is a gas expansion chamber in fluid communication with the bore and the gas block. In some examples, the gas expansion chamber includes a diameter at least twice the bore diameter. The gas block of the gas operating system, in some examples, includes a piston, where in response to receiving gases from the gas expansion chamber, the piston cycles the gas operating system.

Abstract: A method of performing conductivity-based imaging is disclosed comprising exciting at least one pair of electrodes according to an excitation scheme. The at least one pair of electrodes comprising a surface electrode located on the surface of an examined body and at least one in-body electrode located inside of the examined living body. Voltages developing on the surface electrodes and on the in-body electrodes during the excitation according to the excitation scheme arc measured, an inverse problem is solved to achieve a 3D conductivity map from the measured voltages, and a 3D image of the body tissues based on the 3D conductivity map is provided.

Abstract: Thrombectomy catheter systems, accessory devices, and methods for making and using such devices are disclosed. An example thrombectomy system may include a catheter shaft having a proximal portion, a distal portion, and a lumen extending at least partially through the catheter shaft. A high pressure tube may be disposed within the lumen. The high pressure tube may be designed for communication with a fluid source. A fluid jet emanator may be coupled to the high pressure tube. The fluid jet emanator may have at least one jet orifice. The catheter shaft may include a first orifice disposed proximally of a distal end of the catheter shaft and a second orifice disposed proximally of the first orifice. An accessory device may be disposed within the lumen. The accessory device may include a helical distal region.

Abstract: Techniques and architectures are disclosed for a gas operating system for a firearm. The system includes a barrel having a bore including a rifled portion. Attached to the barrel is a gas block. Located distally of the rifled portion of the bore is a gas expansion chamber in fluid communication with the bore and the gas block. In some examples, the gas expansion chamber includes a diameter at least twice the bore diameter. The gas block of the gas operating system, in some examples, includes a piston, where in response to receiving gases from the gas expansion chamber, the piston cycles the gas operating system.

Abstract: In one embodiment, a method receives a query for analyzing data in a database. The query includes a first level calculation that is performed before a second level calculation. When an operator associated with the first level calculation is present in the query, the method performs: calculating the first level calculation by removing group by information for a reference characteristic for the first level calculation to determine a first level calculation result and calculating the second level calculation using the first level calculation result using the group by information for the reference characteristic to determine a second level calculation result, wherein the group by in the second level calculation combines groups of rows in a database table of the database that have the same content in their specified columns.

Abstract: The disclosure provides a device for fine weight adjustment of a host apparatus. The host apparatus can be a free weight or similar having a bar with a bar diameter. The device can have an annular or disc-shaped body. The annular body can have an inner disc perimeter defining a central aperture having a diameter substantially similar to the bar diameter of the host apparatus. The annular body can also have a slot extending through the annular body from an outer perimeter to the central aperture defining a first disc end and a second disc end separated by a slot width. The annular body can be formed of a material having an elasticity sufficient to allow axial flexibility that returns the annular body to its original shape after being deformed to fit around the bar of the host apparatus.

Abstract: A regulator that controls an amount of energy provided to an auto loader for rounds having different gun powder loads is provided. The regulator includes a chamber, and a piston in fluid communication with the chamber. The regulator may further include a throttling valve having a first position in which pressurized combustion gas from the gas port of a barrel of a firearm can flow into the chamber, and a second position in which pressurized combustion gas from the gas port of a barrel of a firearm cannot flow into the chamber. The throttling valve is configured to move from the first position to the second position when pressure in the chamber exceeds a threshold level. The regulator may include an expansion valve in fluid communication with the chamber and arranged to move from a first position to increase a volume of the chamber when pressure in the chamber exceeds a threshold level.

Abstract: Thrombectomy catheter systems, accessory devices, and methods for making and using such devices are disclosed. An example thrombectomy system may include a catheter shaft having a proximal portion, a distal portion, and a lumen extending at least partially through the catheter shaft. A high pressure tube may be disposed within the lumen. The high pressure tube may be designed for communication with a fluid source. A fluid jet emanator may be coupled to the high pressure tube. The fluid jet emanator may have at least one jet orifice. The catheter shaft may include a first orifice disposed proximally of a distal end of the catheter shaft and a second orifice disposed proximally of the first orifice. An accessory device may be disposed within the lumen. The accessory device may include a helical distal region.

Abstract: The present disclosure relates to a method (200) of updating safety-related software in a people conveyor system, particularly in an elevator system (10), the method comprising: the steps of providing an updated version of the safety-related software (210); storing (230) the updated version of the safety-related software in a safety unit (60) of the people conveyor system; activating (240) the updated version of the safety-related software, the step of activating including operating a software update activation switch permanently associated with the people conveyor system; and in case of successful activation of the updated version of the safety-related software, controlling the operation of the people conveyor system based on the updated version of the safety-related software (290).

Abstract: In one embodiment, a method receives a query for analyzing data in a database. The method then determines a constant in the query and determines an operator applied to the constant in the query. The operator explicitly controls a behavior of the constant. The constant is represented as a scalar representation in the query instead of as a vectorial representation where the constant would have been used as the vectorial representation without the use of the operator due to a rule governing use of constants. Then, the method performs a calculation for the query to determine a query result using the constant as the scalar representation.