31results about How to "Meet actual clinical needs" patented technology

Provided is an X-ray image acquisition method and device. The X-ray image acquisition method comprises the steps that according to initial rack parameters set in a pre-exposure zone and overlapped zones of two adjacent frames of images, initial exposure frame number for image splicing is calculated; the initial exposure frame number is adjusted to obtain actual exposure frame number, actual rack parameters are determined according to the actual exposure frame number so that an actual exposure zone is not greater than the pre-exposure zone, and an absolute value of the difference of the actual exposure frame number and the initial exposure frame number is smaller than 1; based on the actual exposure frame number and the actual rack parameters, corresponding detector positions and bulb tube rotation angles during acquisition of the frames of images are calculated; exposure is performed according to the actual rack parameters and the corresponding detector positions and the bulb tube rotation angles during acquisition of the frames of images, and images to be spliced are obtained. By adopting the method and device, an examined object can be effectively prevented from receiving excessive radiation dosage in the photography process.

The invention provides a flat panel detector system and a rapid awakening method thereof. The flat panel detector system comprises, at least, an X-ray sensor, a standby voltage stabilizing circuit, an acquisition circuit, a main CPU control processing unit, an image display unit, a battery unit, a low-noise voltage stabilizing circuit, a switching power supply and an auxiliary CPU power supply management unit. The auxiliary CPU power supply management unit is used for providing standby and awakening time sequence control of a flat panel detector and meanwhile conducts powering-on and powering-off control on the battery unit, the low-noise voltage stabilizing circuit and the switching power supply respectively. Standby and awakening time sequence control is conducted on the flat panel detector by adding the auxiliary CPU power supply management unit, and when the flat panel detector is standby, powering on for the X-ray sensor is kept, and meanwhile part of circuit constitution unit is closed to reduce the standby power consumption of the flat panel detector. In addition, the flat panel detector can be rapidly awakened, and improvement of clinical experience of a user is promoted.

The invention discloses a bone repair material constructed by 3D printing, a preparation method and application thereof. The bone repair material is composed of an inner core structure including an inner layer part and a peripheral part, an outer layer structure and an antibacterial spray layer. The 3D printed bone repair material of the present invention combines degradable materials with the ability to induce bone growth with engineering plastics with excellent mechanical properties by optimizing the structure, ensuring the strength of the bone repair material. The outermost layer is sprayed with The self-made hydroxyapatite and silver mixed powder of trace elements can promote bone healing and endow the material with certain antibacterial properties; in addition, the molding of the bone repair material of the present invention is realized by double-nozzle 3D printing, which omits the traditional The complicated process of processing technology improves the precision and realizes individual shaping, which is more in line with clinical needs.

The embodiment of the invention discloses a radiation dose calculation device, device and storage medium. The device includes: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors perform the following operations: obtain the target The information corresponding to the object; according to the Monte Carlo algorithm and the information corresponding to the target object, determine the first dose distribution corresponding to the target object; use the first dose distribution and the information corresponding to the target object as the input of the preset neural network model, according to the preset The output result of the neural network model determines the second dose distribution corresponding to the target object; wherein, the accuracy of the second dose distribution is higher than the accuracy of the first dose distribution. Through the technical solutions of the embodiments of the present invention, faster calculation speed and higher calculation accuracy can be ensured to meet clinical needs.

The invention discloses a method and a device for removing motion blur from a projected image of a CBCT (Cone Beam Computerized Tomography) system and the CBCT system. The method for removing the motion blur from the projected image of the CBCT system comprises the steps: determining an area N occupied by tissue in the projected image, wherein the size of the area N is related to an angular speed W of motion of a rack of the CBCT system, exposure time T of the CBCT system, a pixel size L of an imaging unit and a distance D from the center of rotation of the rack to a plane of the imaging unit; acquiring a first projected image at a frame rate which is not smaller than a formula shown in the description, synthesizing every INT (FR*T) first projected images so as to generate the motion blur removed projected image. By adopting the method disclosed by the invention, the motion blur caused by detector motion is removed from the synthesized projected image, and the spatial resolution and signal-to-noise ratio of the projected image can be remarkably increased.

The embodiment of the present application discloses a hemodynamic index determination method, device, device, and storage medium, wherein the method includes: responding to a hemodynamic index prediction request, determining the hemodynamic index prediction request The point cloud coordinate data set corresponding to the medical image in the medical image; the first space coordinate transformation is performed on each point cloud coordinate data in the point cloud coordinate data set to obtain the first point cloud coordinate data after space coordinate transformation; The point cloud coordinate data is subjected to first high-dimensional space mapping processing to obtain second point cloud coordinate data with a first preset dimension; wherein, the first preset dimension is greater than the initial dimension of the first point cloud coordinate data ; Splicing the second point cloud coordinate data and the first point cloud coordinate data to form a splicing vector; performing dimension reduction processing on the splicing vector to obtain a hemodynamic index.

The mechanical arm force feedback system, method, control method, and control terminal of the present invention include: a force detection and fixing module for collecting force application data of the operator; a control module for judging the force application data according to the received force application data. The force application state of the operator, wherein the force application state includes: an active force application state and a non-active force application state; a force feedback state adjustment module, which is used to adjust its own working state according to the force application state; the mechanical arm, It is used to adjust the working state of the module according to the force feedback state, and transform it into a state of the mechanical arm adapted to the working state. The invention can realize the real-time movement and hovering of the mechanical arm through algorithm control and according to the force applied by the operator, which meets the actual clinical needs of the surgeon who needs to relax and rest the upper limbs under long-term operation conditions. The present invention can be used not only in conjunction with a surgical robot, but also as an independent surgical instrument, which expands its scope of application.

A metal vascular clamp capable of being directionally degraded and absorbed and a manufacturing method therefor. The vascular clamp comprises an upper arm (2), a lower arm (3) and a tail O-shaped structure (4) all used for closing a blood vessel (1). A V-shaped structure is formed by the upper arm (2), the lower arm (3) and the tail O-shaped structure (4) before closing. The end of the upper arm (2) and the end of the lower arm (3) are provided with self-locking structures (5, 6) matched with each other. When the metal vascular clamp is used, the blood vessel needing to be closed is placed in a gap between the upper arm (2) and the lower arm (3) of the V-shaped structure, and the upper arm (2) and the lower arm (3) are squeezed to enable the included angle therebetween to be gradually decreased until the self-locking structures (5, 6) of the upper arm and the lower arm are mutually locked and closed. The outer side and the inner side of the upper arm (2) and the outer side and the inner side of the lower arm (3) are provide with different microstructures and electric potential differences, the grains on the outer sides are dimensionally larger than the grains on the inner sides and the electric potential differences on the outer sides are lower than the electric potential differences on the inner sides, so that directional degradation from the outer side to the inner side is achieved after the vascular clamp is closed. Through the change of the tissue structure differences of different parts of the material of the vascular clamp in a directional way, the electric potential differences thereof can be changed, and thus the directional degradation in different orders of degradation is achieved.

The invention belongs to the field of radiotherapy dose calculation, and relates to a treatment plan dose calculation method, equipment and storage medium for simulating linear accelerator with uneven grid distribution. The method includes the following steps: setting the parameters of the uneven grid and the initial flux value of the corresponding grid; calculating the contribution of each grid to the total dose distribution, and obtaining the dose of the entire radiation field in the selected phantom after superposition; Compare the difference between the real dose and the dose calculation; if the difference is within the preset calculation accuracy range, accept the current grid segmentation parameters and flux values ​​for the dose calculation of the patient's treatment plan; if the difference exceeds the preset calculation accuracy range , after fine-tuning the separation in the y-direction of the grid and the flux value corresponding to each grid, perform dose calculation until the calculation result meets the preset accuracy. The invention calculates the radiation dose through the non-uniform two-dimensional flux grid without adjusting the resolution of the grid, and can directly calculate the dose value of each grid according to the mechanical parameters, so that the number of grids is controllable.

The invention relates to a method for surface modification of a titanium-based implant and a composite coating on the surface of the titanium-based implant. The composite coating on the surface of the titanium-based implant comprises an internal layer, intermediate layer and outer layer; the inner layer is formed inward from the surface of the titanium-based implant along the thickness direction, and M metal material exists in the form of M element and M oxide, and M is calcium and / or strontium; M metal material exists in the intermediate layer in the form of M element and M oxide, and N metal material exists in the form of N oxide, and N is magnesium, calcium, zinc, sodium At least one of potassium and potassium; the outer layer includes N oxides; by adjusting the thickness of the outer layer film, the degradation time of the N oxides in the outer layer under physiological environment is controlled.