272 results about "Spiral ct" patented technology

The invention discloses a method for grading and managing detection of pulmonary nodes based on in-depth learning. The method for grading and managing detection of the pulmonary nodes based on in-depth learning is characterized by comprising the steps of S100, collecting a chest ultralow-dose-spiral CT thin slice image, sketching a lung area in the CT image, and labeling all pulmonary nodes in the lung area; S200, training a lung area segmentation network, a suspected pulmonary node detection network and a pulmonary node sifting grading network; S300, obtaining pulmonary node temporal sequences of all patients in an image set and grading information marks corresponding to the pulmonary node sequences to construct a pulmonary node management database; S400, training a lung cancer diagnosis network based on a three-dimensional convolutional neural network and a long-short-term memory network. According to the method for grading and managing detection of the pulmonary nodes based on in-depth learning, the lung area segmentation network, the suspected pulmonary node detection network, the pulmonary node sifting grading network and the lung cancer diagnosis network are trained based on in-depth learning, the pulmonary nodes are accurately detected, and through the combination of subsequent tracking and visiting, more accurate diagnosis information and clinic strategies are obtained.

The invention relates to an intracranial tumor comprehensive operation planning and simulating method based on the 3D print technology. DICOM data obtained through patient spiral CT craniocerebral enhancement scanning are utilized first, different partition methods are adopted for data information extraction and reconstruction according to characteristics of skulls, blood vessels and tumors, and registration and fusion of the skulls, the blood vessels and the tumors are achieved in the same coordinate system; craniocerebral entity models of patients are obtained through a rapid prototyping technology and a virtual three-dimensional geometrical model after optimizing processing is conducted; information of diameters, sizes and the number of tumors and adjacent relations between the diameters, the sizes and the number of tumors and important blood vessels and tissue around is extracted, and preoperative comprehensive risk analysis, operation plan design, operation plan simulation and operation risk response analysis are carried out on the basis of the craniocerebral entity models of the patients, personalized operation plans are provided for the patients in order to improve the accuracy and success rate of intracranial tumor excision operations, and a feasible intracranial tumor operation planning and simulating method based on the 3D print technology is explored.

The invention relates to a spiral insect catching machine which comprises a spiral cylinder, a spiral door and a spiral wheel, wherein the spiral cylinder is provided with an upper fixed cover, a lower fixed cover, a fixed coil and a lifting transmission component; the fixed coil is in a cylinder spiral shape; the lifting transmission component comprises a motor, a small gear, a big gear, an inclined plane block; the spiral door is arranged in the spiral cylinder, and is composed of a movable coil and a movable connection rod; the spiral wheel is arranged in the spiral door, and is composed of spiral blades and a light tube cylinder; and the lower end of the spiral blade can be provided with an open-close door of the spiral blade. High-voltage electric shock is not used in the spiral insect catching machine provided by the invention, thus obvious sound doesn't exist; and the spiral insect catching machine is especially suitable for quiet environments, and can be used for avoiding the drawback of unstable insect exterminating function caused by the condition that short circuit occurs in the traditional high-voltage power grid. In the invention, as the small motor is started up to operate in a period of time, the electricity can be saved; and the spiral insect catching machine is simple in structure, convenient in injection molding and production, and low in cost.

The invention provides an intraoperative registration device for correcting a preoperative three-dimensional image and a method; a pretreatment module is used for collecting preoperative spiral CT (Computed Tomography) image data of a patient and pretreating the CT image data; a bone mass partitioning and separating module uses an improved three-dimensional seed filling algorithm to obtain interested bone tissues according to the pretreated CT image data and realizes partition and separation of a bone mass in the preoperative CT image data; an X-ray image collecting module is used for adjusting the posture of preoperative position of a patient and collecting X-ray images of the patient at different angles during operation and before operation; a registration module obtains DRR images withthe same angle, finishes registration operation on the X-ray images with corresponding angles before operation and during operation and obtains a transformation matrix of each separated bone mass tissue; a 3D bone interested region model establishing module is used for leading the multi-angle transformation matrix to act on a preoperative partitioned and separated bone mass data model and obtaining the real position of each bone mass model during operation.

Certain embodiments provide staggered circular scans for CT imaging. In certain embodiments, a CT imaging system comprises a plurality of source-detector assemblies that are axially offset from one another and rotate about a rotation axis to provide staggered circular CT scanning.

A servo control system includes a peak detection module that detects peak times of spiral signals generated by reading spirals prewritten on a magnetic medium. The servo control system includes a control module that determines positions of the spirals based on the peak times, stores the positions of the spirals, seeks and tracks the spirals using the positions, and writes servo on the magnetic medium based on the positions of the spirals.

The invention discloses a spiral type twisting soft-bodied robot module and relates to a soft-bodied robot module. Though bending modules of an existing soft-bodied robot can form a hyper-redundant mechanical arm through series connection, the twisting freedom degree is still in lack, so that the problem that the motion forms are singular is caused; and meanwhile, by means of the spiral type twisting soft-bodied robot module, the problem that when a bending module achieves omni-directional motion, control difficulty is high can be solved. A central limiting strip of the spiral type twisting soft-bodied robot module sequentially penetrates a front end cap, an elastic main body and a rear end cap. Multiple spiral inner cavities are machined in the elastic main body and uniformly arranged inside the elastic main body with the central limiting strip as the center. The front end cap is arranged at the upper end of the elastic main body. Sealed connection is achieved between the front end cap and an upper opening of each spiral inner cavity. The rear end cap is arranged at the lower end of the elastic main body. Each spiral inner cavity corresponds to a connection pipe. A lower opening of each spiral inner cavity communicates with the corresponding connection pipe through the rear end cap. By means of the spiral type twisting soft-bodied robot module, a soft-bodied twisting robot is simple in motion form, easy and convenient to manufacture and easy to operate.

The invention relates to a double-energy X-ray spiral CT system for detecting liquid safety, which comprises a detecting device consisting of an X-ray source, a rotary table, a detector or an interlayer detector and a data acquisition unit, and a control part consisting of a microprocessor and a controller, wherein the front end of the detecting device is provided with the X-ray source; the X-raysource is the switchable high-voltage X-ray source or the fixed high-voltage X-ray source; the middle part of the detecting device is provided with the spiral lifting rotary table used for placing a detected liquid; the rear side of the spiral lifting rotary table is provided with the detector or the interlayer detector; the data acquisition unit is connected with the detector or the interlayer detector; the control part comprises the microprocessor and the controller connected with the microprocessor; the controller is connected with the X-ray source and the spiral lifting rotary table; and the microprocessor is connected with the data acquisition unit. The method comprises irradiation, detection, acquisition, comparison, and obtaining a detection result. The system can detect liquid density and equivalent atomic number and ensures to accurately judge liquid property.

The invention parallel reconstruction system for multisource helix CT, includes two modules: the multisource stand scanning module and the image reconstruction module. The multisource stand scanning module uses the scanning structure that the number of 2N+1 of X ray sources rolling synchronously, collects the projection data sending to the image reconstruction module; the image reconstruction module uses exactitude reconstruction arithmetic of multisource helix CT, the single computing assembly module uses the projection data reconstruction of the single X ray source to compute the intermediate result, the computer conforms and reset to get the result, stores the result and display output.

The invention relates to a new type of motion driving mechanism. The walking body adopts a helical mechanism. When the helical mechanism contacts the ground surface, a strong friction pair is formed by the helical contact line or the helical contact surface. Movement or combined horizontal and vertical arbitrary given movement, so as to achieve the purpose of walking movement, this driving form is different from the traditional walking movement, has a strong driving ability, can climb over various obstacles, climb stairs smoothly, and is not affected by various Road restrictions, can adapt to the off-road driving of complex terrain and landforms in the field, can be applied to rescue and disaster relief with complex road conditions or unknown road surfaces, earthquake rescue, obstacle-breaking tools, vehicles for people or materials to climb stairs, etc. The principle of the new spiral walking motion mechanism is simple, It has high reliability, low cost, wide application fields, can be realized in a variety of ways, and can be combined with multiple functions and multiple operation mode applications.

An apparatus and method for sensor and control system, which automatically adjusts a product splitter position of a full-scale spiral. An electrical conductivity-based automation system is described and claimed herein and has been successfully developed and demonstrated as illustrated herein. The system includes a sensor and a microprocessor based and controlled servo or gear motor that is utilized to adjust the splitter of an operating coal/mineral spiral based on the readings of the sensor. The device as described and claimed herein converts a traditional coal spiral to an automated system for controlling the splitter thereby giving the spiral unit the ability to automatically adjust a key process variable, i.e., its splitter position, in real time as and when the feed coal or other mineral property changes to maintain the performance of the spiral at the optimum level.

The present invention discloses a complex force field spiral chute for ore dressing, and fine particles can be effectively prevented from entering into a tailing zone. The spiral chute comprises a channel steel support, an ore-feeding device, magnetic poles, a pulsating pressure water tank, a spiral blade, an ore dividing bucket, an ore intercepting bucket and an ore receiving bucket. The permanent magnetic fixed magnetic poles are installed at an external portion of a spiral blade of an existing spiral chute, so that magnetic fine particles in magnetic mineral can be forced by an inward-radial magnetic retentive force to enter into a concentrate zone under the function of an applied magnetic field. The pulsating water tank is installed at the bottom of a spiral surface, ore particles are prevented from rubbing with the spiral surface, so that the ore particles can be well layered and separated conveniently, and equipment abrasion can be eliminated conveniently. Concentrate grades can be improved, concentration ratio can be increased, mineral recovery rates can be improved, an existing spiral ore dressing technology can be simplified, and equipment maintenance rates and equipment power consumption can be reduced.

In a method for computed tomography and a computed tomography apparatus for scanning a subject with a conical ray beam emanating from a focus that detects a matrix-like detector array, the focus is moved relative to the subject on a spiral path around a system axis, and the detector array supplies output data corresponding to the incident radiation, and images having an inclined image plane are reconstructed from output data respectively supplied during the movement of the focus on a spiral segment, the image planes of these images are inclined by an inclination angle γ around a first axis intersecting the system axis at a right angle and also are inclined by a tilt angle δ with respect to the system axis around a second axis that intersects the first axis as well as the system axis at a right angle.

The invention discloses a condenser with a liquid separation type spiral tube structure, which belongs to the technical fields of heat exchange and heat transfer. A spiral heat exchange tube is fixed in a shell of the condenser with the liquid separation type spiral tube structure; a liquid guiding tube is distributed on the outer circumference of the spiral heat exchange tube; the upper end of the spiral heat exchange tube is a condensing working substance inlet tube; the lower end of the spiral heat exchange tube is a condensing working substance outlet tube; the upper end of the outer circumference of the shell is a cooling water outlet; and the lower end of the outer circumference of the shell is a cooling water inlet. In a condensing process, a thick liquid film distributed on the side wall surface of the spiral outer circumference is derived in a non-dynamical way by utilizing the combined action of surface tension, capillary force and centrifugal force; a thin liquid film is promoted to transfer heat in a condensation phase change process; and the heat resistance of a condensed liquid film on the side of the outer circumference of a spiral tube is decreased, thereby obviously improving the heat exchange performance on the side of a condensation phase change tube. By using the condenser with the liquid separation type efficient spiral tube, a condensate liquid is separated mainly by means of the centrifugal force and the capillary force without being influenced by gravity, and the condensation heat exchange coefficient can be obviously improved both in a ground environment or a microgravity environment.

A 3D image reconstructing method based on dual-source dual-spiral multi-layer spiral CT features that two x-ray sources, two structures of multi-row detectors and two spiral scan paths are used to increase the projection data acquisition speed. It includes such steps as calculating the projection data needed by reconstructing a planar image perpendicular to Z axis by using interpolation algorithm of the multi-layer projection data on two paths, reconstructing the planar image by 2D filter-reverse projection algorithm, and reconstructing a 3D image with a series of said planar images.

The invention discloses a method and equipment for confirming a CT (Computed Tomography) scanning position in a dangerous goods inspection system. The method comprises the following steps of: firstly, through a CT scanning and dual-energy rebuilding method, obtaining one or more layers of CT images containing physical attributes of liquid to be tested; secondly, through an image processing and analyzing method, obtaining a physical attribute value of each liquid to be tested from the CT images; and finally, judging whether the liquid-state object to be tested is a dangerous goods or not according to the physical attribute value. The CT scanning method comprises a regular sectional CT scanning technology and a spiral CT scanning technology; and when the regular sectional CT scanning technology is utilized, a series of specific positions can be set so as to be scanned, a scanning position can be specified by an operator through a DR (Digital Radiography) image, and the position of a liquid part can be confirmed through automatic analysis on the DR image, so that CT scanning is guided.

To realize an endoscope insertion portion and endoscope system capable of providing a significant propulsive function by reducing a friction between a propulsive force generation section and an insertion portion, an endoscope insertion portion comprising: an introductory tube as an insertion portion; a spiral tube as a propulsive force generation section mounted on an outer peripheral surface of the introductory tube and rotating around the longitudinal axis of the introductory tube; and a plurality of ring members provided on an outer peripheral surface of an elastic cover tube at predetermined intervals between an inner peripheral surface of a spiral tube and the elastic cover tube 21, as a friction reduction section positioned between the spiral tube and the outer peripheral surface of the introductory tube (elastic cover tube) and reducing a contact resistance between an outer peripheral surface of the introductory tube (elastic cover tube) and the spiral tube.

Disclosed is a compact self-ballasted fluorescent lamp that includes a phosphor coating provided inside a glass tube bent to have a double-spiral configuration. The arc tube has two spiral parts that are wound around an axis "A", and a turning part joining the two spiral parts. At any cross section of the glass tube, the applied phosphor coating is thicker in the inner surface of the glass tube near the ends of the glass tube in the axis "A" direction, than in the inner surface near the turning part.

Methods and systems for reconstructing images of moving objects being spirally scanned with two dimensional detectors with a 3PI algorithm. The moving objects can be scanned at a rate of up to approximately three times slower than those of pre-existing systems. In a preferred embodiment, the invention allows for a patient on a table moving through a spiral scanner to be slowed down by a factor of up to three, and still use the same size detector array as those in existing spiral scanning systems.