38 results about "Angio ct" patented technology

A system provides a single composite image including multiple medical images of a portion of patient anatomy acquired using corresponding multiple different types of imaging device. A display processor generates data representing a single composite display image including, a first image area showing a first image of a portion of patient anatomy acquired using a first type of imaging device, a second image area showing a second image of the portion of patient anatomy acquired using a second type of imaging device different to the first type. The first and second image areas include first and second markers respectively. The first and second markers identify an estimated location of the same corresponding anatomical position in the portion of patient anatomy in the first and second images respectively. A user interface enables a user to move at least one of, (a) the first marker in the first image and (b) the second marker in the second image, to correct the estimated location so the first and second markers identify the same corresponding anatomical position in the portion of patient anatomy.

A combination catheter enables performing an angiogram and an angioplasty (and repetitions of one or both) with the same catheter instrument, without removal from and re-insertion into an artery until the procedure is completed.

The device is provided with a laser (1) for exciting the fluorescent imaging agent which emits radiation at a wavelength that causes any of the agent located within the vasculature or tissue of interest (3) irradiated thereby to emit radiation of a particular wavelength. Advantageously, a camera capable of obtaining multiple images over a period of time, such as a CCD camera (2) may be used to capture the emissions from the imaging agent. A band-pass filter (6) prevents the capture of radiation other than that emitted by the imaging agent. A distance sensor (9) incorporates a visual display (9a) providing feedback to the physician saying that the laser be located at a distance from the vessel of interest that is optimal for the capture of high quality images.

A method for contrast-agent-free non-triggered angiographic imaging in magnetic resonance tomography that includes the steps of (S1) 2D or 3D measurement of a bodily region having a flow of blood, using a flow-insensitive SSFP sequence, (S2) measurement of the same bodily region using a flow-sensitive SSFP sequence, (S3) registration of the measurement results obtained in steps S1 and S2 to one another, (S4) unweighted or self-weighted subtraction of the registered measurement result obtained in step S2 from the registered measurement result obtained in step S1, (S5) execution of a 2D or 3D image correction of the image obtained in step S4 by removing image distortions caused by gradient field inhomogeneities and/or magnetic basic field inhomogeneities, and (S6) representation of the angiogram obtained in step S5 in the form of an MIP or segmented 2D or 3D vessel tree representation.

The invention discloses an imaging system of an endoscope.According to the system, one end of a first switch is connected with red laser and the other end of the first switch is connected with a first controllable decorrelation device to serve as a first channel; one end of a second switch is connected with a green light source and the other end of the second switch is connected with a first controllable decorrelation device to serve as a second channel; one end of a third switch is connected with a blue light source and the other end of the third switch is connected with a third controllable decorrelation device to serve as a third channel; the first channel, the second channel and the third channel are connected with a mixer, and mixed signal light is output; the first controllable decorrelation device in the first channel is not enabled, output signal light is used for laser speckle imaging, a laser speckle angiography image is generated, output signal light of the second channel and the third channel is used for narrow-band light imaging, and a narrow-band light image is generated.The imaging system of the endoscope breaks through narrow-band light imaging depth, detects the angiemphraxis condition, and improves the capacity of recognizing blood vessel depth information.

A workflow for a minimally invasive intervention, such as a treatment for a cancerous tumor, includes positioning a patient at a multi-functional imaging apparatus, obtaining pre-interventional images of the anatomy of the patient using a computed tomography or angiography imaging function, performing the minimally invasive intervention while the patient is positioned at the multi-functional imaging apparatus and while using a fluoroscopic imaging function, and performing a post-interventional imaging of the patient's anatomy while the patient is positioned at the multi-functional imaging apparatus using the computed tomography or angiographic imaging function. If the post-interventional imaging determines that additional intervention is in order, the additional intervention is performed while the patient is positioned at the imaging apparatus. Pre-intervention images and data sets from other sources may be combined with or used during the intervention. A treatment planning step may be included following the pre-interventional imaging and the intervention.

An angiographic examination method for depicting a target region as an examination object using an angiography system includes capturing a volume data set of the target region with the examination object, registering the volume data set to a C-arm, and extracting information about an assumed course of the examination object in the volume data set. The method also includes generating a 2D projection image of a medical instrument in the target region, 2D/3D merging the 2D projection image and the registered volume data set for generating a 2D overlay image, and detecting the instrument in the 2D overlay image with a first projection matrix. The method includes generating a virtual 2D projection using a virtual projection matrix, 3D reconstructing the instrument, and distorting at least part of the reference image such that the current and the assumed course of vessels are made to be congruent.

The invention discloses an angiography method. The angiography method comprises the following steps: 1, obtaining a reinforced image and a plain scanned image, and limiting a sub graph of the reinforced image and a sub graph of the plain scanned image; 2, obtaining a bone reticle mask of the sub graph of the plain scanned image; 3, conducting registering on the sub graph of the reinforced image and the sub graph of the plain scanned image,, so that the spatial alternation relation between the corresponding sub graphs of the plain scanned image and the reinforced image is obtained, and positioning bone tissues on the sub graph of the reinforced image, so that a bone reticle mask of the sub graph of the plan scanned image; 4, combining the bone reticle mask of the sub graph of the reinforced image and the sub graph of the reinforced image, so that a blood vessel image is obtained. Through the arrangement, the blood vessel imaging effect and efficiency can be greatly improved, and the method facilitates disease diagnosis and treatment.

Disclosed is a method for enhancing blood vessels in angiography images. The method incorporates the use of linear directional features present in an image, extracted by a Directional Filter Bank, to obtain more precise Hessian analysis in noisy environment and thus can correctly reveal small and thin vessels. Also, the directional image decomposition helps to avoid junction suppression, which in turn, yields continuous vessel tree.

X-rays are applied without administrating an angiographic contrast agent, unadministration image acquiring means (7) acquires an unadministration image of an angiographic contrast agent unadministrated state, X-rays are applied after administrating an angiographic contrast agent, and an administration image acquiring means (8) acquires an administration image of an angiographic contrast agent administered state. The acquired unadministration and administration images are superimposed on one the other by blood vessel trace image acquiring means (9), the image data on the DSA images obtained in the angiographic contrast agent unadministrated and administrated states is processed, and thus a blood vessel trace image is acquired. The acquired blood vessel trace image is black-white inverted by image processing means (10), and blood vessels are displayed in white. A beam hardening filter (4) is inserted. While inserting a guide wire (W) in the blood vessel, X-ray fluoroscopic imaging is performed. The X-ray fluoroscopic image and the blood vessel trace image are superimposed on one the other by image superimposing means (11), and the acquired superimposed image is displayed on a display monitor (15).

Method and system for processing vascular radiography images which have been reconstructed by three-dimensional modelling, in which: from this three-dimensional modelling there is determined a three-dimensional model known as the masked model which features the calcified elements and the prosthetic elements, but not the vascular elements; a three-dimensional model known as the subtracted model, which features the vascular elements alone, is determined; these two models are merged, weighting their voxels so as to increase the contrast between the images of the masked model and the images of the subtracted model; and summing the voxels thus weighted.

The invention discloses an angiography machine, which comprises an X-ray source, a detector, a C-shaped arm, a C-shaped arm slide rail, a supporting arm, a connection portion and a display. The C-shaped arm is arranged in the C-shaped arm slide rail and capable of sliding in the C-shaped arm slide rail; the detector is arranged at one end of the C-shaped arm; the X-ray source is arranged at the other end of the C-shaped arm and opposite to the detector; the display is used for displaying at least one of angle information of the C-shaped arm, bed height information, collision information and distance SID between the X-ray source and an imaging surface of the detector. By additional arrangement of the display on the side of the C-shaped arm, display contents of the display can be conveniently checked by an operator or doctor, and accuracy in movement of the C-shaped arm and safety in a detection process are improved.

A contrast agent for angiography is disclosed, in particular, for examining animal or human bodies or components thereof such as members or organs thereof, comprising an essentially oil-based apolar contrast component for X-ray examinations, the contrast component having a contrast component viscosity in the range of 30-100 mPas. The contrast agent is characterised in that the contrast component is present in a mixture with at least one further apolar component, the viscosity of which is less than or at most equal to the contrast component viscosity. Methods for angiography examination are also disclosed, in which such a contrast agent or also a polar contrast agent are used at least periodically and applications of such contrast agents.

The invention generally relates to intraluminal imaging and methods of tracking one or more portions of a catheter during diagnostic and/or interventional treatment procedures based, at least in part, on a radiolucent feature of the catheter. The invention provides co-registration systems and methods for intraluminal imaging in which a volume of radiolucent negative space within a catheter, generated via translation of a sensor within the catheter, is used to track the location of one or more portions of the catheter, particularly the sensor. Thus, when a vessel is flushed with radiopaque contrast media during angiography, the system provides an improved method of tracking the location of the sensor, which would otherwise be difficult to determine with conventional methods.

The invention relates to an angiography device in the cardiology department, and belongs to the technical field of medical instruments. The angiography device in the cardiology department comprises a body, a fixed rotating device and a stable motion driving device, a digital subtraction angiography machine is arranged in front of the body, an information display screen is arranged at the front side of the digital subtraction angiography machine, a scanning start key is arranged below the information display screen, a power key is arranged on the right of the scanning start key, an angiography scanning key is arranged on the right of the power key, a wire port is formed below the angiography scanning key and internally connected with a power line, and the power line is connected with a plug; an angiography scanning head is arranged on the digital subtraction angiography machine, a charger is arranged in the angiography scanning head and connected with a trigger power line, and the trigger power line is connected with a trigger device. The angiography device is complete in function, convenient to use, scientific, safe and efficient, saves time and labor when used for conducting angiography on a patient, and greatly reduces work difficulty of medical workers.

The invention provides an angiography device. The angiography device comprises a first part, a second part and an annular third part, wherein the first part is fixed on an external foundation support through a first rotating shaft and can rotate along the axial direction of the first rotating shaft; the second part is fixedly connected with the first part through a second rotating shaft and rotates along the axial direction of the second rotating shaft; the third part is positioned on an annular track of the second part and can rotate along the center of the annular track. A ray tube and a detector for photographing an angiography picture are installed on the annular inner surface of the third part. When the angiography device is used, a patient is arranged in a ring of the third part, and the switching of 360-DEG omnibearing imaging angles of the ray tube and the detector on the patient can be realized by virtue of the rotation of the first part, the second part and the third part, so that under the situation that the body position of the patient is not changed, the angiography pictures of vascular morphology in different angles can be acquired, and the disease diagnosis information can be more comprehensively and accurately acquired.

The invention relates to a guiding catheter and a catheter assembly for angiography and an angiography method. The catheter assembly comprises the guiding catheter and an angiography catheter. The guiding catheter comprises a tube-shaped body with a guiding end arranged at the front end, and a lateral opening communicated with an inner hole of the tube-shaped body is formed in part, on the rear side of the guiding end, of the tube-shaped body. The catheter assembly further comprises a guiding wire used for driving the angiography catheter to stretch into the inner hole of the tube-shaped body and enabling the front end of the angiography catheter to penetrate out of the lateral opening. When the catheter assembly is used, the guiding catheter can stretch into the arch of the arcus aortae firstly, the lateral opening is made to correspond to a corresponding branch blood vessel, the angiography catheter is coaxially led into the guiding catheter under the cooperation of the guiding wire, then the guiding wire is rotated to enable the front end of the angiography catheter to penetrate out of the lateral opening in the guiding catheter and enter the corresponding blood vessel, then angiography operation is carried out, the guiding catheter can play the strong supporting role for the angiography catheter, and the stability of the angiography process is ensured.

The invention discloses an angiography image acquisition device and method. The device comprises an X-ray imaging unit, an image processing unit, a display unit, an image storage unit and a control unit, wherein the X-ray imaging unit is used for generating raw images of X-ray and sending the raw images to the image processing unit which calculates 3D fusion parameters; the display unit receives the first raw image, the second raw image and the 3D fusion parameters and conducts display through a 3D stereoscopic image form; the image storage unit conducts storage on the raw images and the control unit provides control pulses for the X-ray imaging unit and controls the angle of an X-ray bulb tube simultaneous. By means of the angiography image acquisition device and method, 3D stereoscopic images are generated in real time, the display effect of CT/RM 3D reconstruction is achieved simultaneously, the image overlapping influence is reduced, specific structure space location relationship is provided, and image lines can be displayed more clearly and visually.

The invention discloses a fundus examination system. The system comprises a light source, a first selection light filtering device and a light guide device; the first selection light filtering deviceis arranged between the light source and the light guide device, and allows all light or blue light of the light source to pass through the first selection light filtering device, and the light guidedevice is used for conducting the light passing through the first light selection light filtering device to the interiors of the eyeballs. By means of the system, intraoperative angiography can be achieved, and the system can also suitable for common intraoperative intraocular lighting examinations.

A computed tomography (CT) imaging apparatus that reduces metal artifacts for digital subtraction angiography by, in circuitry, obtaining mask frames and contrast frames generated during scans of an object; performing a first reconstruction of the mask frames to generate metal volume data; identifying metal voxels in the metal volume data; re-projecting the metal voxels into the mask frames to generate metal-mask frames; defining a region of interest in each of the mask frames, each region of interest including metal regions; re-projecting the contrast frames; blending the mask frames with the re-projected contrast frames; registering the contrast frames with respect to the blended mask frames performing a cross-correlation analysis of the mask frames and the contrast frames, frame-pair-by-frame-pair; subtracting the registered contrast image from the corresponding mask image, frame-pair-by-frame-pair, to generate subtracted frames; and performing a second reconstruction on the subtracted frames.