Abstract: Systems and methods are provided for simulating medical images based on previously acquired data and a defined imaging protocol. In an example, a method includes generating a simulated medical image of a patient via virtual imaging based on previously obtained medical images and a scan intent of the virtual imaging, and outputting an imaging protocol based on a virtual protocol of the virtual imaging.

Abstract: Methods and systems are provided for contrast-to-noise evaluation in medical imaging systems. In one embodiment, a method includes positioning a phantom having a variable width cross-section within a gantry of a computed tomography (CT) system so that the variable width cross-section is perpendicular to a central axis of the CT system, adjusting the phantom within the gantry of the CT system to a first imaging configuration having a first position and a first translation within the gantry, acquiring a first set of measurements from the phantom in the first imaging configuration, and calculating a contrast-to-noise ratio (CNR) of the CT system based on at least the first set of measurements and a first material density of an imaged slice of the phantom in the first imaging configuration.

Abstract: An X-ray imaging system includes a gantry with moving and stationary parts on moving and stationary sides, respectively, the parts communicatively coupled via a data communication system. The moving part includes an X-ray source to emit X-rays; an X-ray detector configured to generate detector data; and on-moving-gantry processing circuitry. The on-moving-gantry processing circuitry is configured to determine, for each of a number of partial data sets of the generated detector data, a metric value of at least one metric, the metric value being translatable into a type of data management for the partial data set among at least two different types of data management. The processing circuitry further configured to decide, for each partial data set, how it set is to be treated based on the determined metric value of the at least one metric and to selectively effectuate data management according to the corresponding type of data management.

Abstract: Systems and methods are provided for simulating medical images based on previously acquired data and a defined imaging protocol. In an example, a method includes generating a simulated medical image of a patient via virtual imaging based on previously obtained medical images and a scan intent of the virtual imaging, and outputting an imaging protocol based on a virtual protocol of the virtual imaging.

Abstract: Methods and apparatus are provided for assessing endothelial function in a mammal.

Abstract: A target assembly for generating radiation may comprise a target, a substrate and a window. The target may be capable of generating first radiation when impinged by a beam. The window may be at least partially permeable to the beam. The window and the substrate may form at least part of a hermetically sealed chamber and the target may be positioned in the chamber. The chamber may be filled with air having a normal or reduced content of oxygen.

Abstract: A system and method for adapting treatment plan are provided. The method may include: obtaining a planning image of a region of interest relating to a first treatment fraction of a first treatment plan; obtaining a first image of the region of interest relating to a first scan of the region of interest with a first dose level; comparing the planning image with the first image to generate a first comparison result; determining whether the first comparison result satisfies a first replanning condition; causing, in response to a determination that the first comparison result satisfies the first replanning condition, one or more scanners to perform a second scan with a second dose level to provide a second image; and generating a second treatment plan according to the second image, wherein the second dose level is higher than the first dose level.

Abstract: A radiation therapy medical apparatus is disclosed. The medical apparatus comprises: a base; a cylindrical gantry, peripherally and rotatably supported by the base; a radiation therapy assembly, comprising an arm and a radiation head, wherein one end of the arm is fixed to a first position on a first side of the gantry and the other end thereof is extended outwardly, and the radiation head is fixed to the other end of the arm; an imaging assembly, mounted to a second side of the gantry opposite to the first side, and configured to be a first balanced weight part for balancing the radiation therapy assembly; and a counterbalance, fixed to the second side of the gantry, and configured to cooperate with the imaging assembly to prevent the gantry from turnover under action of the radiation therapy assembly and configured to dynamically balance with the radiation therapy assembly with respect to a rotation axis of the gantry.

Abstract: Methods and apparatus are provided for assessing endothelial function in a mammal. In certain embodiments the methods involve using a cuff to apply pressure to an artery in a subject to determine a plurality of baseline values for a parameter related to endothelial function as a function of applied pressure (Pm); b) applying a stimulus to the subject; and applying external pressure Pm to the artery to determine a plurality of stimulus-effected values for the parameter related to endothelial function as a function of applied pressure (Pm); where the baseline values are determined from measurements made when said mammal is not substantially effected by said stimulus and differences in said baseline values and said stimulus-effected values provide a measure of endothelial function in said mammal.

Abstract: A target assembly for generating radiation may comprise a target, a substrate and a window. The target may be capable of generating first radiation when impinged by a beam. The window may be at least partially permeable to the beam. The window and the substrate may form at least part of a hermetically sealed chamber and the target may be positioned in the chamber. The chamber may be filled with air having a normal or reduced content of oxygen.

Abstract: A system and method for adapting treatment plan are provided. The method may include: obtaining a planning image of a region of interest relating to a first treatment fraction of a first treatment plan; obtaining a first image of the region of interest relating to a first scan of the region of interest with a first dose level; comparing the planning image with the first image to generate a first comparison result; determining whether the first comparison result satisfies a first replanning condition; causing, in response to a determination that the first comparison result satisfies the first replanning condition, one or more scanners to perform a second scan with a second dose level to provide a second image; and generating a second treatment plan according to the second image, wherein the second dose level is higher than the first dose level.

Abstract: Methods and apparatus are provided for assessing endothelial function in a mammal. In certain embodiments the methods involve using a cuff to apply pressure to an artery in a subject to determine a plurality of baseline values for a parameter related to endothelial function as a function of applied pressure (Pm); b) applying a stimulus to the subject; and applying external pressure Pm to the artery to determine a plurality of stimulus-effected values for the parameter related to endothelial function as a function of applied pressure (Pm); where the baseline values are determined from measurements made when said mammal is not substantially effected by said stimulus and differences in said baseline values and said stimulus-effected values provide a measure of endothelial function in said mammal.

Abstract: Methods and apparatus are provided for assessing endothelial function in a mammal. In certain embodiments the methods involve using a cuff to apply pressure to an artery in a subject to determine a plurality of baseline values for a parameter related to endothelial function as a function of applied pressure (Pm); b) applying a stimulus to the subject; and applying external pressure Pm to the artery to determine a plurality of stimulus-effected values for the parameter related to endothelial function as a function of applied pressure (Pm); where the baseline values are determined from measurements made when said mammal is not substantially effected by said stimulus and differences in said baseline values and said stimulus-effected values provide a measure of endothelial function in said mammal.

Abstract: A radiation therapy medical apparatus is disclosed. The medical apparatus includes a base, a cylindrical gantry peripherally and rotatably supported on the base, a first medical device assembly fixed to a first side of the gantry, a cylinder fixed to a second side of the gantry, the gantry disposed between the first medical device and the cylinder, a drag chain carrier comprising a carrier body surrounding the cylinder and defining an annular track, a drag chain, arranged within the annular track, wherein a first end of the drag chain is fixed to the cylinder and a second end is fixed to the cylindrical carrier body, and a cable supported by the drag chain, wherein a first end of the cable is electrically connected to the first medical device assembly.

Abstract: A medical apparatus is disclosed. The medical apparatus comprises a base, a support assembly and a patient support. The support assembly includes a first support rotatably mounted to the base, a second support movably mounted to the first support to move along a first horizontal direction, a third support, a height adjustment mechanism disposed between the second support and the third support such that the height of the third support with respect to the second support is adjustable, and a fourth support movably mounted to the third support to move along a second horizontal direction perpendicular to the first horizontal direction. The patient support is movably mounted to the fourth support to move along the first horizontal direction.

Abstract: Methods and apparatus are provided for assessing endothelial function in a mammal. In certain embodiments the methods involve using a cuff to apply pressure to an artery in a subject to determine a plurality of baseline values for a parameter related to endothelial function as a function of applied pressure (Pm); b) applying a stimulus to the subject; and applying external pressure Pm to the artery to determine a plurality of stimulus-effected values for the parameter related to endothelial function as a function of applied pressure (Pm); where the baseline values are determined from measurements made when said mammal is not substantially effected by said stimulus and differences in said baseline values and said stimulus-effected values provide a measure of endothelial function in said mammal.

Abstract: A system, medium, and method including obtaining a plurality of positions for multiple components defined by a plan; obtaining a set of constraints that express limitations for the multiple components at the plurality of positions, the constraints being applicable to a plan where the multiple components synchronously change their positions with time to traverse a prescribed sequence of the plurality of positions, at least one of the multiple components being further constrained to change its position over time by staying within a predefined tolerance to a predefined smooth function of position over time between different positions; determining a trajectory of position and a minimum duration in which the multiple components completely synchronously traverse the prescribed sequence of positions while satisfying the constraints for the multiple components; and generating a record of the determined trajectory of position and the minimum duration for the plurality of components.

Abstract: Methods and apparatus are provided for assessing endothelial function in a mammal. In certain embodiments the methods involve using a cuff to apply pressure to an artery in a subject to determine a plurality of baseline values for a parameter related to endothelial function as a function of applied pressure (Pm); b) applying a stimulus to the subject; and applying external pressure Pm to the artery to determine a plurality of stimulus-effected values for the parameter related to endothelial function as a function of applied pressure (Pm); where the baseline values are determined from measurements made when said mammal is not substantially effected by said stimulus and differences in said baseline values and said stimulus-effected values provide a measure of endothelial function in said mammal.

Abstract: A medical apparatus is disclosed. The medical apparatus comprises a base, a support assembly and a patient support. The support assembly includes a first support rotatably mounted to the base, a second support movably mounted to the first support to move along a first horizontal direction, a third support, a height adjustment mechanism disposed between the second support and the third support such that the height of the third support with respect to the second support is adjustable, and a fourth support movably mounted to the third support to move along a second horizontal direction perpendicular to the first horizontal direction. The patient support is movably mounted to the fourth support to move along the first horizontal direction.

Abstract: A radiation therapy medical apparatus is disclosed. The medical apparatus includes a base, a cylindrical gantry peripherally and rotatably supported on the base, a first medical device assembly fixed to a first side of the gantry, a cylinder fixed to a second side of the gantry, the gantry disposed between the first medical device and the cylinder, a drag chain carrier comprising a carrier body surrounding the cylinder and defining an annular track, a drag chain, arranged within the annular track, wherein a first end of the drag chain is fixed to the cylinder and a second end is fixed to the cylindrical carrier body, and a cable supported by the drag chain, wherein a first end of the cable is electrically connected to the first medical device assembly.