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1. WO2016145019 - TRACKING SIGNALS FOR CATHETER

Publication Number WO/2016/145019
Publication Date 15.09.2016
International Application No. PCT/US2016/021467
International Filing Date 09.03.2016
IPC
G01R 33/28 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44-G01R33/6496
A61B 5/06 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
06Devices, other than using radiation, for detecting or locating foreign bodies
CPC
A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; ; Measuring using microwaves or radiowaves
055involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
A61B 5/062
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
06Devices, other than using radiation, for detecting or locating foreign bodies
061Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
062using magnetic field
A61B 5/6852
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
6846specially adapted to be brought in contact with an internal body part, i.e. invasive
6847mounted on an invasive device
6852Catheters
G01R 33/287
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
285Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR
287involving active visualization of interventional instruments, e.g. using active tracking RF coils or coils for intentionally creating magnetic field inhomogeneities
Applicants
  • IMRICOR MEDICAL SYSTEMS, INC. [US]/[US]
Inventors
  • WEDAN, Steven R.
  • LLOYD, Thomas W.
  • TURCIOS, Milton Noe
  • SUNNARBORG, Daniel N.
Agents
  • WRIGLEY, Barbara A.
Priority Data
14/642,04909.03.2015US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TRACKING SIGNALS FOR CATHETER
(FR) SIGNAUX DE SUIVI POUR CATHÉTER
Abstract
(EN)
A method for projecting a broad tracking signal received by an inductively coupled element, such as a transformer during an MR tracking sequence is provided. By varying projection planes, the signal acquired from the transformer along the transmission line can be used to depict the body of the actively tracked medical device, such as the shaft or deflection region of a catheter. This may be achieved by interpolating a line between the position of the transformer element within the transmission line and the tracking coil. A curvature may be added to the line segment and gradually increased until the arc length of the line segment is approximately equal to the predefined length. The direction of the curve may be determined by virtually connecting the transformer position to the distal most tracking coil position, then the curve of the line segment is increased towards the proximal coil position.
(FR)
L’invention concerne un procédé de projection d’un signal de suivi large reçu par un élément couplé par induction, par exemple un transformateur pendant une séquence de suivi par RM. En faisant varier des plans de projection, le signal acquis provenant du transformateur le long de la ligne de transmission peut servir à décrire le corps du dispositif médical suivi activement, par exemple la tige ou la zone de déflexion d’un cathéter. Cela peut être réalisé par l’interpolation d’une ligne entre la position de l’élément de transformateur dans la ligne de transmission et la bobine de suivi. Une courbure peut être ajoutée au segment de ligne et graduellement accrue jusqu’à ce que la longueur de l’arc du segment de ligne soit approximativement égale à la longueur prédéfinie. La direction de la courbe peut être déterminée en reliant virtuellement la position du transformateur à la position de la bobine de suivi la plus distale, puis la courbe du segment de ligne est accrue vers la position de bobine proximale.
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Latest bibliographic data on file with the International Bureau