Locating a catheter transducer in a three-dimensional ultrasound imaging field.
Cardiac procedures rely on fluoroscopy for catheter guidance and visualization. However, fluoroscopy provides poor contrast of myocardial structures and exposes both the patient and health care providers to ionizing radiation. As an alternative to fluoroscopy, real-time three-dimensional (3-D) ultrasound imaging has the potential to provide a safe means for tracking catheter position in 3-D while simultaneously imaging the heart's anatomy. A method is described for locating a catheter-mounted transducer in the 3-D ultrasound imaging field. The distance from the imaging transducer to the catheter transducer is measured by time of flight, while the angular position is determined by a spatial crosscorrelation of the received signals with stored receive profiles. Results from simulations with 20-dB SNR demonstrated a mean accuracy of 0.22 +/- 0.13 mm at a 70-mm range. In vitro testing showed a resolution of 0.23 +/- 0.11 mm at a range of 75 mm and a resolution of 0.47 +/- 0.47 mm at a range of 97 mm. With combined catheter position and imaging, this tracking method has the potential to replace fluoroscopy and enhance interventional procedures.
Duke Scholars
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Related Subject Headings
- Transducers
- Models, Cardiovascular
- Image Enhancement
- Feasibility Studies
- Echocardiography, Three-Dimensional
- Cardiac Catheterization
- Biomedical Engineering
- 4603 Computer vision and multimedia computation
- 4009 Electronics, sensors and digital hardware
- 4003 Biomedical engineering
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Transducers
- Models, Cardiovascular
- Image Enhancement
- Feasibility Studies
- Echocardiography, Three-Dimensional
- Cardiac Catheterization
- Biomedical Engineering
- 4603 Computer vision and multimedia computation
- 4009 Electronics, sensors and digital hardware
- 4003 Biomedical engineering