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| Number | Title | Issue Date |
| 5638819 | Method and apparatus for guiding an instrument to a target A system (10) presents a graphic guidance object (46) in a display screen (40) to aid a surgeon in guiding a probe (12) from an initial point (82) relative to a body (14) along a desired trajectory (54) to a target (52). The graphic object (46) may be pre... | 06/17/1997 |
| 5622170 | Apparatus for determining the position and orientation of an invasive portion of a probe inside a three-dimensional body System for sensing at least two points on an object for determining the position and orientation of the object relative to another object. Two light emitters mounted in spaced relation to each other on an external portion of an invasive probe remaining ou... | 04/22/1997 |
| 5622169 | Apparatus and method for locating a medical tube in the body of a patient There is disclosed an apparatus and method for locating a medical tube within the body of a patient. The medical tube is located by a detection apparatus which senses the static magnetic field strength gradient generated by a magnet associated with the me... | 04/22/1997 |
| 5617857 | Imaging system having interactive medical instruments and methods The invention provides an improved imaging system and method. The imaging system is of the type having a medical instrument including a source for emitting detectable energy and an instrument body having a work portion. The imaging system further includes... | 04/08/1997 |
| 5611345 | Medical instrument with improved ultrasonic visibility A medical instrument, and in particular, a needle, having improved reflective properties and enhanced ultrasonic visibility when used in conjunction with an ultrasonic imaging system is disclosed. The medical instrument has a non-circular shaped portion a... | 03/18/1997 |
| 5592939 | Method and system for navigating a catheter probe A system for navigating a catheter probe through a body cavity includes a sensing coil affixed to a distal end of the probe. Magnetic fields are projected into the body cavity to induce voltage signals in the sensing coil that are sufficient to describe t... | 01/14/1997 |
| 5558091 | Magnetic determination of position and orientation A magnetic position and orientation determining system uses magnetic fields, desirably including uniform fields from Helmholtz coils positioned on opposite sides of a sensing volume and gradient fields generated by the same coils. By monitoring field comp... | 09/24/1996 |
| 5513637 | Method and apparatus for determining the position of catheters, tubes, placement guidewires and implantable ports within biological tissue A method and apparatus for determining accurately, both during and after insertion, the full length position of catheters (including implanted ports), tubes and placement guidewires within biological tissue is disclosed including a transmitter/detector un... | 05/07/1996 |
| 5494035 | Method for detecting presence of ferromagnetic objects in a medical patient Medical patients are screened prior to magnetic resonance imaging by using a superconducting quantum interference device magnetometer to detect the unknown presence of an implanted ferromagnetic object. The patient is placed on a table which vibrates at a... | 02/27/1996 |
| 5445150 | Invasive system employing a radiofrequency tracking system An invasive imaging system employs a self-contained RF transmitter attached to an invasive device which allows tracking of the invasive device within a subject without physical connections to a tracking/display system and without the use of ionizing rays.... | 08/29/1995 |
| 5443066 | Invasive system employing a radiofrequency tracking system An invasive imaging system employs a self-contained RF transmitter attached to an invasive device which allows tracking of the invasive device within a subject without physical connections to a tracking/display system and without the use of ionizing rays.... | 08/22/1995 |
| 5437277 | Inductively coupled RF tracking system for use in invasive imaging of a living body RF tracking system employs a RF invasive device coupled to surgical tracking equipment for tracking the invasive device. An inductive coupling permits the device to be quickly coupled to, and decoupled from, the equipment. The coupling comprises an induct... | 08/01/1995 |
| 5425367 | Catheter depth, position and orientation location system A system for externally locating the depth and orientation of a catheter in tissue with an external probe which generates a virtual rotating magnetic field. The catheter includes an inductive coil for developing an induced signal in response to the virtua... | 06/20/1995 |
| 5386828 | Guide wire apparatus with location sensing member The invention is directed to a guide wire apparatus and a method for detecting the location of a guide wire within the body of a patient. The apparatus includes a guide wire with an internally-housed sensing member. The guide wire assembly is structured t... | 02/07/1995 |
| 5377678 | Tracking system to follow the position and orientation of a device with radiofrequency fields A tracking system in which radiofrequency signals emitted by an invasive device such as a catheter, are detected and used to measure the position and orientation of the invasive device. The invasive device has a transmit coil attached near its end and is ... | 01/03/1995 |
| 5375596 | Method and apparatus for determining the position of catheters, tubes, placement guidewires and implantable ports within biological tissue A method and apparatus for determining accurately, both during and after insertion, the full length position of catheters (including implanted ports (64)), tubes (30) and placement guidewires (22) within biological tissue is disclosed including a transmit... | 12/27/1994 |
| 5353795 | Tracking system to monitor the position of a device using multiplexed magnetic resonance detection A tracking system employs magnetic resonance signals to monitor the position of a device such as a catheter within a subject. The device has a receiver coil which is sensitive to magnetic resonance signals generated in the subject. These signals are detec... | 10/11/1994 |
| 5325873 | Tube placement verifier system A system for detecting the position of an object within a body of biological tissue includes a resonant circuit attached to the object and a probe including a receiver/transmitter that operates at the resonant frequency of the object. The resonant circuit... | 07/05/1994 |
| 5318025 | Tracking system to monitor the position and orientation of a device using multiplexed magnetic resonance detection A tracking system employs magnetic resonance signals to monitor the position and orientation of at least one device such as a catheter within a subject. The device has a plurality of receiver coils which are sensitive to magnetic resonance signals generat... | 06/07/1994 |
| 5273025 | Apparatus for detecting insertion condition of endoscope An apparatus is provided for detecting an endoscopic inserting condition. The apparatus includes an irradiation arrangement for applying electromagnetic waves to the inside of an organism from outside the organism, an electromagnetic wave reception arrang... | 12/28/1993 |
| 5271400 | Tracking system to monitor the position and orientation of a device using magnetic resonance detection of a sample contained within the device A tracking system employs magnetic resonance signals to monitor the position and orientation of a device, such as a catheter, within a subject. The device has an MR active sample and a receiver coil which is sensitive to magnetic resonance signals generat... | 12/21/1993 |
| 5265610 | Multi-planar X-ray fluoroscopy system using radiofrequency fields During an X-ray fluoroscopy procedure, the position and orientation of an invasive device, such as a catheter, are measured with radiofrequency fields. The invasive device has a transient coil attached near its end and is driven by a low power RF source t... | 11/30/1993 |
| 5257636 | Apparatus for determining position of an endothracheal tube An apparatus for determining the optimum position of an endotracheal tube while allowing simultaneous ventilation of a patient with the endotracheal tube is disclosed. This apparatus contains a stylet, connecting means for adjustably and removably disposi... | 11/02/1993 |
| 5255680 | Automatic gantry positioning for imaging systems A tracking system which measures the position and orientation of invasive devices is used to automatically control the location of the X-ray imaging system gantry and/or patient table. The position and orientation of the invasive device, such as a cathete... | 10/26/1993 |
| 5253647 | Insertion position and orientation state pickup for endoscope A position and orientation state pickup is designed to detect the position and orientation state of an endoscope inserted into a living body without any adverse effect on the living body, which is often observed in X-ray analysis. The position and orienta... | 10/19/1993 |
| 5251635 | Stereoscopic X-ray fluoroscopy system using radiofrequency fields During an X-ray procedure, the position and orientation of an invasive device, such as a catheter are measured with radio frequency fields and displayed stereoscopically. Instantaneous three-dimensional positions of the invasive device are displayed by su... | 10/12/1993 |
| 5211165 | Tracking system to follow the position and orientation of a device with radiofrequency field gradients A tracking system in which radiofrequency signals emitted by an invasive device such as a catheter are detected and used to measure the position and orientation of the invasive device within a subject. Detection of the radiofrequency signals is accomplish... | 05/18/1993 |
| 5099845 | Medical instrument location means An instrument location determining device which has a radiating element forming part of the instrument to be inserted into an object. The element radiates a signal and the signal is detected by at least one receiving element. A signal energy level measure... | 03/31/1992 |
| 5042486 | Catheter locatable with non-ionizing field and method for locating same A catheter locatable with a non-ionizing field, such as an electromagnetic or acoustic field, has a transmitting or receiving antenna for the relevant field at its tip. Receiving or transmitting antennas for the non-ionizing field are attached to a patien... | 08/27/1991 |
| 5005592 | Method and apparatus for tracking catheters A device for tracking catheters includes an oscillator which is coupled to a transmit coil. The transmit coil is rotated in a direction transverse to the longitudinal axis of the transmit coil. A receive coil situated on the guide wire of a catheter inser... | 04/09/1991 |
| 4989608 | Device construction and method facilitating magnetic resonance imaging of foreign objects in a body Device construction facilitating the visibility of a device when inserted into a body being subjected to magnetic resonance imaging having a member adapted to be inserted into the body. The member carries material exhibiting a characteristic under magneti... | 02/05/1991 |
| 4905698 | Method and apparatus for catheter location determination A method and apparatus (10) for determining accurately the location of the tip (14) of a catheter (16) inside biological tissue is disclosed including a locator (34) having a coil (38) wound axially on a core (36) and a detector (12) in the form of a coil... | 03/06/1990 |
| 4572198 | Catheter for use with NMR imaging systems A magnetic resonance catheter system combining with a magnetic resonance imaging device, a catheter including a coil winding for exciting a weak magnetic field at the tip of the catheter. The location of the catheter tip is thereby obtained in cooperation... | 02/25/1986 |
| 4317078 | Remote position and orientation detection employing magnetic flux linkage The process and system for locating the position and orientation of an implement in space wherein a varying magnetic field responsive component (14) such as a coil is positioned upon the implement. A magnetic field source (12) excitable from an a.c. sourc... | 02/23/1982 |
| 4197855 | Device for measuring the location, the attitude and/or the change in location or, respectively, attitude of a rigid body in space In the illustrated embodiment, a field generator may be arranged on the body or at an interval therefrom, and produces a defined irregular field. For detecting the field flux a first surface with a plurality of sensor elements is provided, at least a part... | 04/15/1980 |
| 4173228 | Catheter locating device A system for detecting and monitoring the position of a catheter tip during insertion and after placement of the catheter in a body cavity. A coupling means such as an inductor coil is secured adjacent the catheter tip, and leads extend from the coil alon... | 11/06/1979 |
