34 results about "Cerebral angiography" patented technology

A method and apparatus for assessment of hemodynamic and functional state of the brain is disclosed. In one embodiment, the method and apparatus includes non-invasive measurement of intracranial pressure, assessment of the brain's electrical activity, and measurement of cerebral blood flow. In some embodiments, the method and apparatus include measuring the volume change in the intracranial vessels with a near-infrared spectroscopy or other optical method, measuring the volume change in the intracranial vessels with rheoencephalography or other electrical method, and measuring the brain's electrical activity using electroencephalography.

Disclosed herein is a medical imaging technique that uses a fluorinated nanoparticle contrast agent for imaging of an interior portion of a body. The fluorinated nanoparticles preferably comprise nontargeted intravascular fluorocarbon or perfluorocarbon nanoparticles. The interior body portion may be a patient's vasculature, and the medical imaging is preferably noninvasive MR angiography, which may encompass (either for 2D imaging or 3D imaging) MR coronary angiography, MR carotid angiography, MR peripheral angiography, MR cerebral angiography, MR arterial angiography, and MR venous angiography. Coils tuned to match to the ¹⁹F signal can be used, or dual tuned coils for ¹⁹F and ¹H imaging can be used. Clinical field strengths (e.g. 1.5 T) and clinical doses may be used while still providing effective images.

The invention provides a transcranial ultrasound cerebral angiography super-resolution imaging method based on Markov chain Monte Carlo multi-object tracking. The transcranial ultrasound cerebral angiography super-resolution imaging method comprises the following steps: sampling an ultrasound plane wave echo signal received by a low-frequency transcranial dedicated ultrasound linear array energy converter, and converting into radio frequency data; according to the radio frequency data, generating an ultrasound cerebral angiography image; removing background information generated by time domainmedian filtering in the ultrasound cerebral angiography image, and keeping image information of angiography microbubbles; through the Markov chain Monte Carlo multi-object tracking, deducing an angiography microbubble trajectory; according to a trajectory set obtained by deduction, carrying out cerebral angiography super-resolution imaging. The invention puts forward the transcranial super-resolution imaging method based on Markov chain Monte Carlo. Compared with other super-resolution imaging methods, the transcranial super-resolution imaging method disclosed by the invention has the characteristics of high frame rate, low data acquisition amount and suitability for high-concentration angiography microbubbles. Compared with traditional low-frequency angiography imaging, the method disclosed by the invention is characterized in that a cerebral vascular resolution ratio can be greatly improved under a noninvasive condition.

The invention relates to a safety shield used for carrying out X-ray protection on operators and patients in the process of DSA cerebral angiography and intervention. A medical assembly-type X-ray safety shield comprises four single shields, and is characterized in that each single shield is equally divided into an upper grid and a lower grid, the upper grid of each single shield is a lead glass plate, and the lower grid of each single shield is a lead plate. Two single shields are assembled into a first double-connected shield through a pin-type hinge, and the other two single shields are assembled into a second double-connected shield through a pin-type hinge. One end of a stainless steel cross beam is arranged at the top of the first double-connected shield, and the other end of the stainless steel cross beam is arranged at the top of the second double-connected shield. Two trundle supports are arranged at the bottom of each single shield, two universal trundles are arranged under each trundle support, and a plurality of visual lead rubber sheets are hung on the stainless steel cross beam. The X-ray safety shield well resolves the problem of multi-surface protection of operators and patients who are exposed to X-ray for a long time, can be converted into single-surface or multi-surface protection according to actual demands or be detached to become multiple machines with one shield, and is convenient to move and store.

The invention relates to a cannula assembly for cerebral vascular intervention through radial artery approach, which comprises an outer cannula, a middle passage catheter and a guide wire; the outer cannula is provided with a first bending section, a first linear section, a second bending section, a second linear section, a third bending section, an outer cannula linear section and an outer cannula joint; the second bending section is bent towards the far-end direction, and the bending curvature of the far-end section of the second bending section is larger than that of the near-end section of the second bending section; the second linear section is longer than the first linear section and has larger inclination; the middle passage catheter is provided with a head end section, a neck section, a middle passage catheter linear section and a middle passage catheter joint; and the hardness of the outer cannula is greater than that of the middle passage catheter. The cannula assembly can improve the convenience and success rate of whole cerebral vascular hyperselection through the radial artery approach, avoids vascular injury, is suitable for approach of any one of left and right radial arteries, and can be used for cerebral angiography and cerebral vascular disease interventional therapy.

The invention relates to the field of medical instruments, and discloses a carotid artery compressor. The carotid artery compressor is used for assisting a patient in cerebral angiography and comprises a first clamping rod, a second clamping rod, a bandage and a pair of compression assemblies; one end of the second clamping rod is rotationally connected with one end of the first clamping rod; oneend of the bandage is installed at the other end of the first clamping rod, and the other end of the bandage is installed at the other end of the second clamping rod; and the pair of compression assemblies are oppositely mounted on the first clamping rod and the second clamping rod and used for compressing the carotid artery of the patient. When the patient is assisted in cerebral angiography, thecarotid artery compressor is arranged on the neck of the patient in a sleeving mode, the bandage is adjusted to enable the compression assemblies to compress the carotid artery of the patient, and then the first clamping rod and the second clamping rod are inserted into positioning holes of a scanning bed. Therefore, the carotid artery compressor provided by the invention can assist a doctor in compressing the carotid artery during cerebral angiography, so that the working efficiency of the doctor is improved, and the doctor is prevented from being radiated.

Devices and methods for establishing trans-radial access for medical intervention are described. In particular, some embodiments are optimized for consistently safely achieving complete cerebral angiography via a single trans-radial access site. A system may include a catheter with at least two active steering sites. Some embodiments may include at least one balloon. The methods include using said steering mechanisms to help guide and support said catheter. In some embodiments additional use is made of at least one vascular arch to provide further support and prevent kickback and prolapse of said catheter and any additional devices passed therethrough.

The invention relates to a brain contrast image processing method and device, a medium and electronic equipment. The method comprises the steps that a brain contrast image is acquired; brain partitionis performed on the brain contrast image to obtain a brain partition image; the edge of each partition in the brain partition image is smoothed to obtain a target brain partition image; and a regionof interest is identified from the target brain partition image. Thus, the acquired cerebral angiography image can be partitioned at first; then region-of-interest identification is respectively carried out on the subarea images; the whole processing method can be automatically executed, manual operation is not needed, a manual method does not need to be adopted for visual evaluation, the recognition difficulty and cost of the region of interest are reduced. The problems that due to visual evaluation conducted through the manual method, consumed time is long, efficiency is low, recognition results are inconsistent, and consequently the reliability of judgment results is affected are solved.

The invention provides a method and system for removing artifacts in cerebral angiography, and the method comprises the steps: dividing brain X-ray images into three types according to the shooting time of a C-shaped arm, namely a brain X-ray image sequence before the injection of a contrast agent, a brain X-ray image sequence after the injection of the contrast agent and a preset time, and a brain X-ray image sequence between the two; the brain X-ray image sequence between the brain X-ray image sequence and the brain X-ray image sequence is processed to obtain an image only comprising artifacts, subtraction is carried out on a cerebral angiography image obtained in a traditional mode, and then artifacts are eliminated. Compared with a traditional cerebral angiography artifact removal method, the cerebral angiography artifact removal method has higher artifact removal accuracy, and a clearer cerebral angiography image can be obtained.

The invention discloses a head fixing device for cerebral angiography, and relates to the technical field of cerebral angiography, the head fixing device comprises a support, a headrest is mounted on the top of the support, a massage piece is mounted on the headrest, the massage piece comprises an air bag, a connecting pipe, a ball and a supporting plate, a third catheter is mounted on one side of the air bag, one end of the connecting pipe is installed on the air bag, the other end of the connecting pipe is connected with the supporting plate, and the air bag is used for storing air and providing the air into the connecting pipe so that the ball can move in the connecting pipe. According to the device, by installing the massage piece in the headrest, the patient can maintain a posture until the end of the operation, and the operation can be carried out. By means of the hose assembly, tension and discomfort of the patient can be relieved, pain is relieved, by means of the head limiting assembly, local hyperemia of head blood vessels cannot be caused, and safety of the cerebral angiography operation is guaranteed.

The invention discloses a preformed guide wire in cerebral angiography. The guide wire comprises a catheter and a guide wire body, the guide wire body comprises a metal inner core, a resin layer, a functional coating and a drug coating, the guide wire body is provided with a soft tip, a connecting tip axial rod middle section and a proximal push rod section, and the soft tip is a spiral tip. The preformed guide wire in the cerebral angiography can shorten the distance and the operation time of inserting the catheter and the guide wire body from a femoral artery in the past, in particular, change the direction of the guide wire body without passing a heart to reduce the burden on the heart of a patient, prevent damage to valves, complete a surgery in a short period of time, can reduce the radiation of a doctor and the patient, and be conducive to the early recovery of the patient.

The invention discloses a trans-right radial artery III type aortic arch cerebral angiography catheter. The catheter comprises an inner tube and an outer tube, wherein the inner tube comprises a firsttube section, a second tube section, a third tube section and a fourth tube section; an included angle of 135-145 degrees is formed between the first tube section and the second tube section, and a first bend bent towards the outer side is formed; an included angle of 40-55 degrees is formed between the second tube section and the third tube section, and a second bend bent towards the inner sideis formed; an included angle of 130-140 degrees is formed between the third tube section and the fourth tube section, and a third bend bent towards the outer side is formed; the outer tube is coaxially arranged on the outer side of the inner tube in a sleeving mode; and the hardness of the outer tube is smaller than that of the inner tube, so that the outer tube can move along the inner tube. According to the angiography catheter, a loop does not need to be formed in the aortic arch, blood vessels on the arch can be directly super-selected, and the loop forming step of a Simmons catheter is omitted.

The invention discloses a novel head fixing device for cerebral angiography. The device comprises a bottom plate, a head fixing assembly and a jaw bone fixing assembly; a sponge pillow is arranged above the bottom plate; the two sides of the bottom plate are fixedly connected with side plates; the head fixing assembly is installed on the side plate; a sliding way is formed in the surface of the side plate; a movable plate is clamped in the sliding way; the jaw bone fixing assembly is installed on the movable plate; a first threaded rod penetrates through the bottom plate; and one end of the first threaded rod is fixedly connected with an extension rod. The novel head fixing device for cerebral angiography relates to the technical field of medical apparatus and instruments for radiography.The novel head fixing device for cerebral angiography is reasonable in design and simple to operate and is high in overall stability; the head of a user can be fixed according to the requirements of the user through cooperation of all the structures; more comfortable use feeling is provided for the user; it is avoided that the head shakes during radiography due to fatigue or tension of the user; and therefore, the radiography effect is affected, and the use requirements of the user are met.

The invention discloses a clinical cerebral angiography machine for the neurology department. The machine comprises a control box, four second electric telescopic rods are connected to the lower surface of the control box through bolts, the four second electric telescopic rods are located at the four corners of the control box, a rotary table is connected to the upper end of one side of the control box through a short shaft, a first electric telescopic rod is connected to the upper end of the rotary table through a supporting base, and an arc-shaped outer gear ring is welded to the outer sideof the rotary table; by means of the first electric telescopic rod, an X-ray machine can be driven to move vertically, movement is more convenient so that the height of the X-ray machine can be adjusted, the X-ray machine can be driven to rotate by means of an angle motor, and then the angle of the X-ray machine can be adjusted more conveniently, and convenience is brought to people. The clinicalcerebral angiography machine for the neurology department is simple in structure and easy to operate, not only can the angle be adjusted, but also an image is clearer, and convenience is brought to doctors.

The high-precision head fixing device comprises a fixing bin, a clamping type fixing mechanism, a rotary type clamping mechanism, a comfort level fine adjustment mechanism and an extrusion type fixing mechanism, the clamping type fixing mechanism is arranged in the fixing bin and used for fixing the neck, the clamping type fixing mechanism comprises a pair of adjusting blocks, and the adjusting blocks are arranged on the clamping type fixing mechanism. A clamping semi-ring is arranged on the adjusting block, a sliding rotating groove matched with the clamping semi-ring is formed in the fixing bin, the adjusting block is connected with a first motor, the first motor penetrates through the clamping semi-ring, and the first motor is connected with a torque sensor. Through the arrangement of corresponding mechanisms on the headrest, fixation of the head and the neck of a patient is improved, the possibility that the head and the neck of the patient shake is reduced, the definition of a contrast image is improved, meanwhile, the contrast accuracy is greatly improved, and the influence of a doctor on patient condition judgment is reduced.

The invention discloses a cerebral angiography simulation training assembly, which comprises a simulation blood vessel body, a mounting flat plate and a blood vessel tortuosity position adjusting part, the simulation blood vessel body is cooperatively installed and fixed on the mounting flat plate, a plurality of screw mounting seats are uniformly distributed on the mounting flat plate, and the adjusting part comprises a plurality of screw bodies. The screw body is detachably and movably mounted on the screw mounting seat, and the screw body can adjust the position of the simulated blood vessel body and change the tortuosity of the simulated blood vessel body; and the liquid inlet end of the simulated blood vessel body is hermetically connected with an external water source for continuous perfusion, and the liquid outlet end of the simulated blood vessel body is connected with a liquid collecting device. The invention further discloses a using method of the simulation training assembly. The whole actual interventional surgery operation can be simulated, different blood vessel tortuosity can be adjusted according to training difficulty, a learner can adjust different training difficulty to carry out practical operation training, the learning effect is improved, the training cost is reduced, and finally the operation skill of the learner is improved.

The invention discloses a head fixing device for cerebral angiography. The head fixing device comprises a base and a boss fixed on the base, wherein a supporting plate which can move up and down is insliding connection to the upper end surface of the base through a spring, and a curved concave part for bearing the head is arranged on the supporting plate; side limiting plates which are in slidingconnection to the base are symmetrically arranged on two sides of the supporting plate; a first screw rod in threaded cooperation with the side limiting plate is arranged in the base and is driven bya first motor to rotate so as to drive the side limiting plate to make the same-direction movement or opposite-direction movement, and an air sac is arranged on one side close to the supporting plate, of each of the side limiting plates; and when the side limiting plates make opposite-direction movement and are close to the supporting plate, the air sacs can press the head on the supporting plate, and when the pressure born by the air sacs is higher than a set value, a sensor is used for controlling the first motor to stop working.

The invention discloses a cerebral vessel contrast medium injector. The cerebral vessel contrast medium injector comprises a handle, a rotating disc is fixedly connected to the left end of the handle,a rotating shaft is fixedly connected to the left side face of the rotating disc, two bearings sleeve the surface of the rotating shaft and are clamped to the left and right side faces of the inner wall of a shell respectively, the lower surface of the shell is fixedly connected with the upper surface of a fixing plate, a driving wheel is clamped to the surface of the rotating shaft and located between the two bearings and is in transmission connection with a driven wheel through a belt, the driven wheel is clamped to the surface of a threaded barrel, and the threaded barrel is clamped to theleft side face of the inner wall of the shell. The cerebral vessel contrast medium injector has the advantages that through the cooperation of the handle, the rotating shaft, the driving wheel, the belt, the driven wheel, the threaded barrel, a threaded column, an injector body, a baffle, a stop block, a telescopic rod, springs, a through hole and a spongy cushion, the purpose of fixing the injector is achieved, and thus the work of doctors and patients is facilitated.