30 results about "Intracranial electrodes" patented technology

An encephalic electrode individualization locating method based on multimode medical image data fusion relates to the fields of medical instruments and medical image processing and neuroimaging. By means of multimode medical image data including magnetic resonance images, X-ray images and intranperative optical photos, the space position relation of an encephalic electrode and a brain tissue structure is comprehensively measured, a relation between the position of the encephalic electrode and a brain anatomical structure is established, and accurate and fast individualization locating of the encephalic electrode is achieved. The encephalic electrode individualization locating method based on multimode medical image data fusion can be used in the fields of cognitive neuroscience basic research, clinic neurosciences and the like, provide accurate brain space position information for an encephalic electroencephalogram signal, and enhance application value in the aspect of electrophysiological basis research.

A method for accurate localization and visualization of implanted electrodes, such as implanted intracranial electrodes, is provided. More particularly, a realistic representation of intracranial electrode positions on patient-specific post-implantation MRI brain renderings is obtained. The resulting computer models provide an accurate depiction of electrode locations on three-dimensional brain renderings that are suitable for use in surgical planning of resection boundaries around, for example, epileptic zones. Electrodes placed inter-hemispherically are also visible with this method. In addition, a method for creating electrode “shadows” cast upon the brain model surface is provided. These electrode shadows are useful for estimating cortical areas sampled by iEEG and for locating electrodes that may straddle sulci and contact two adjacent cortical gyri.

The present invention relates to electrode assemblies, neurostimulation systems and methods for implanting and using same. In exemplary embodiments, the electrode includes a body having a conductive contact surface dimensioned and configured to contact a patient's skull; and an electrode head associated with the body. The electrode head is sized for subcutaneous positioning adjacent the subject's skull, and the electrode body is of a length and configured such that the electrode body extends at least partially through the patient's skull but does not contact the patient's dura mater. As these electrodes need not directly contact the brain nor penetrate the dura mater to be effective in neurostimulatory applications, they avoid many of the disadvantages, e.g. increased risk of infection and invasive implantation procedures, associated with conventional electrode design.

Provided are a cerebral cortex electrode and magnetic resonance image fusion display method and device. The method comprises: (S01) obtaining an MRI image through MRI scanning before a patent is implanted with an intracranial electrode and an implanted CT image through CT scanning after the patent is implanted with an intracranial electrode; (S02), registering the MRI image and the CT image in a same coordinate space; S03, extracting electrode image information in the registered CT image; S04, extracting cerebral cortex tissue image information from the registered MRI image; S05, performing special fusion on the electrode image information and the cerebral cortex tissue image information, and displaying the information after special fusion in a 3-dimension graphic method; and S06,adjusting the effect and angle of3-dimension graphic display, and converting an adjusted result into a required format for outputting and storing. According to the invention, electrode position information can be obtained.

An electrode module is positioned inside an intracranial portion of a human head. Then, it captures brain images of the human head so multiples two dimensional (2D) cross-sectional images are obtained. The electrodes can be seen in one or more 2D cross-sectional images. A brain functional map adjusting portion is provided to obtain the 2D cross-sectional images and then to conduct a proportional deformation process for the images in the brain functional map database. By combining the processed images in the brain functional map database and the 2D cross-sectional images, multiple combined cross-sectional images can be obtained for display. So, the effects of intracranial electrodes are better than the traditional way. In addition, the brain structure information of a patient contains the precise positions of the electrodes and the corresponding brain functional areas.

The invention discloses an intracranial deep electrode and a medical instrument. The intracranial deep electrode comprises an insulating support, a plurality of electrode contacts spaced apart at thefront end of the intracranial deep electrode, an electrically conductive terminal and an electromagnetic induction element, wherien the terminal is connected with the support body, the terminal is positioned at the front end of the support body, the electromagnetic induction element is arranged in the terminal, and the electromagnetic induction element is used for acquiring position information ofthe terminal. In the intracranial deep electrode according to an embodiment of the present invention, the electromagnetic induction element for indicating position information of the end is arrangedin the end, the positional information of such a head can be fed back to an external device through an electromagnetic induction element so that the path of the intracranial deep electrode can be traced, thereby improving the accuracy of determining the position of each brain region through the intracranial deep electrode, thereby improving the accuracy of surgical removal of a lesion (e.g., an epileptic lesion).

The invention discloses a digital input brain-computer interface system based on SEEG signals. The digital input brain-computer interface system comprises a stimulation presentation module, a signal acquisition module, a model training module and an online data analysis module. The stimulation presentation module presents a P300 electroencephalogram mode of stimulating and inducing the testee in asingle flickering mode; the signal acquisition module is used for acquiring and amplifying intracranial electroencephalogram signals of a testee; the model training module performs classifier training on the training data to obtain a classifier response model; and the online data analysis module analyzes the online data in real time by utilizing the obtained classifier response model and outputsa result. The system provided by the invention can realize a digital input function by decoding intracranial electrode signals. According to the system, the same or higher input accuracy and information transmission rate can be realized by using fewer electrode channels. Brand-new interactive experience is brought to some epileptic patients, an effective way is provided for clinical scientific research, and potential social value is achieved.

The embodiment of the invention relates to the technical field of medical equipment, and particularly discloses an intracranial electrode module and an intracranial electrode implantation device.The intracranial electrode module comprises a substrate, at least two electrode sampling point sets and a conductive wire, and the electrode sampling point sets are arranged on the substrate and exposed out of the surface of the substrate; the electrode sampling point group comprises electrode sampling points; the conductive wires are arranged on the substrate and are electrically connected with the electrode sampling points; the intracranial electrode module comprises a sampling part, electrode sampling points are located on the sampling part, and the sampling part can be switched between a gathering state and an unfolding state; in the unfolding state, the sampling part is unfolded to be in a fan shape, the sampling part is provided with a first side and a second side which are oppositely arranged in the radial direction of the sampling part, and the electrode sampling point groups are arranged at intervals in the unfolding circumferential direction of the sampling part; and in the gathering state, the second side is gathered. By means of the mode, the intracranial electrode module can be implanted into the human body in the gathering state and then switched into the unfolding state, and therefore the intracranial electrode module can be implanted into the human body through a bone window smaller than the intracranial electrode module.

A cortical access system for delivering a medical tool into an epidural and/or subdural space and onto a patient's brain tissue through a cranium opening comprises: a turret including a proximal end portion, a distal end portion, and a first channel extending from an entrance opening to an exit opening, the first channel configured to guide the medical tool from the entrance opening to the exit opening for positioning on the patients brain tissue. The medical tool may be an electrode or an endoscope.

The invention encompasses systems and methods that allow a clinician who is untrained in the art of electroencephalography to insert and functionalize unitized intracranial electrode arrays at the bedside that, by specific design, position ground and reference electrodes in electrically "quiet" locations to record durable, high-fidelity intracortical EEG.

The embodiment of the invention relates to the technical field of medical instruments and equipment, and particularly discloses an implantation device and intracranial electrode implantation device.The implantation device comprises a shell, a catheter and a driving mechanism, the catheter is arranged on the shell and provided with a through guide hole in the extending direction of the catheter, and the driving mechanism is arranged in the guide hole; the guide pipe comprises a first part and a second part which are connected in sequence, and at least part of the second part is located outside the shell and used for stretching into a planted object; the driving mechanism is arranged on the shell, connected with the second part and used for driving the end, away from the first part, of the second part to be away from or close to the first part so that the second part can be bent or straightened. By means of the mode, the end, away from the first part, of the second part can be driven to be away from or close to the first part, so that the second part is bent or straightened, the implanting angle can be adjusted, and operation of a user is facilitated.

The invention relates to a cable-shaped sensor with a wearing main body. The sensor at least comprises: a plurality of lead wires (1), wherein a first end (1a) of each lead wire (1) is provided with an intracranial electrode (2) for acquiring electroencephalogram data of a patient; and an output electrode (3) which can be arranged on a second end (1b) of each lead wires (1), wherein the output electrode (3) can be coupled to an electroencephalograph (4), so that the electroencephalogram data can be transmitted to the electroencephalograph (4) through the output electrode (3). The cable-shapedsensor also comprises a binding bag (5) which is in a hollow cylinder shape, so that each lead wire (1) of which the first end (1a) and the second end (1b) are both located outside the binding bag (5)can be nested in the binding bag (5), and when being subjected to external force, the lead wires (1) can move along the extending direction of the binding bag (5).

The invention provides an intracranial electrode plate. The intracranial electrode plate comprises a flexible substrate, electrode contacts, electrode pins, leads, bunching pipes and lead connectors, wherein the electrode contacts are arranged on the surface of one side of the flexible substrate; each electrode contact is provided with an electrode pin; the electrode pins are located in the flexible substrate; different electrode pins are connected with one end of different leads in the flexible substrate; an insulating film is arranged on the outer surface of each lead; one end of the bunching pipe is connected with one side of the flexible substrate; the other end of the bunching pipe is sleeved with a plurality of lead connectors; and the other ends of the different leads are connected with the different lead connectors on the bunching pipes. According to the electrode plate provided in the scheme, the flexible substrate material is adopted to relieve extrusion of the electrode plate to cortex, the electrode contacts are fixed in the mode that the electrode contacts are fixed through the electrode pins, the electrode contacts can be fixed, and therefore the time for collecting electroencephalogram signals is prolonged to a certain degree, and the detection precision and resolution are improved.

The invention provides a manufacturing method of an intracranial electrode integrated with macro and micro electrodes. The intracranial electrode integrated with the macro electrode and the micro electrode comprises the macro electrode (1), the micro electrode (2), a sleeve (3) and a wire (4). The wires (4) comprise first-class wires (43) and second-class wires (44); wherein one end of the second-class wire (44) is in the shape of a sphere with an exposed conducting layer, and the microelectrode (2) is formed; the manufacturing method of the intracranial electrode integrated with the macro electrode and the micro electrode comprises the following steps: providing the sleeve (3) with a plurality of through holes (31) in the side wall; connecting one end of the first-class wire (43) to the macro electrode (1); and fixing the macro electrode (1) and the micro electrode (2) on the sleeve (3).

The invention provides an intracranial electrode integrated with macro and micro electrodes. The intracranial electrode integrated with the macro and micro electrodes comprises a sleeve (3), a wire (4) is arranged in the sleeve (3), wherein a macro electrode (1) and a micro electrode (2) are integrated on the side wall of the sleeve (3); and the macro electrode (1) and the micro electrode (2) respectively transmit signals received by the macro electrode (1) and the micro electrode (2) outwards through the wire (4). In the axial direction of the sleeve (3), the macro electrode (1) and the micro electrode (2) are spaced from each other and are arranged on the side wall of the sleeve (3) in a mutually insulated manner.