Application of sonomicrometry and multidimensional scaling to cardiac catheter tracking

This paper describes a technique for tracking the three-dimensional (3-D) position of a cardiac catheter using sonomicrometry and the mathematical method of multidimensional scaling (MDS). Sonomicrometry is used to measure the distances between ultrasonic transceivers. MDS is then used to calculate...

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Bibliographic Details
Published in:IEEE transactions on biomedical engineering 1997-11, Vol.44 (11), p.1061-1067
Main Authors: Meyer, S.A., Wolf, P.D.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biomedical engineering
Cardiac Catheterization - methods
Catheters
Coordinate measuring machines
Crystals
Distance measurement
Electrocardiography
Error analysis
Feasibility Studies
Heart
Image Processing, Computer-Assisted - methods
In vivo
Investigative techniques, diagnostic techniques (general aspects)
Mathematical models
Medical sciences
Miscellaneous. Technology
Models, Theoretical
Multidimensional systems
Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques
Piezoelectric transducers
Posture
Solid modeling
Transceivers
Transducers
Ultrasonic devices
Ultrasonic variables measurement
Ultrasonography - methods
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Summary:This paper describes a technique for tracking the three-dimensional (3-D) position of a cardiac catheter using sonomicrometry and the mathematical method of multidimensional scaling (MDS). Sonomicrometry is used to measure the distances between ultrasonic transceivers. MDS is then used to calculate the 3-D coordinates of the ultrasonic transceiver locations, including the catheter tip, from the measured distances. Feasibility of catheter tracking was initially studied using simulated data from a geometric model in which the actual coordinates of all transceivers were known. The method was then shown to be feasible in vivo by tracking a catheter-mounted piezoelectric transducer using seven reference crystals sewn to the epicardial surface of a sheep heart. Simulation results indicate that a catheter can be tracked with a root-mean-square (rms) error of 1.51/spl plusmn/0.05 mm and an average-distance error of e=1.06/spl plusmn/0.27 mm using 12 reference points. In vivo results showed acceptable stress values (G
ISSN:0018-9294
1558-2531
DOI:10.1109/10.641333