Locating a catheter transducer in a three-dimensional ultrasound imaging field.
IEEE Trans Biomed Eng
; 48(12): 1444-52, 2001 Dec.
Article
en En
| MEDLINE
| ID: mdl-11759925
ABSTRACT
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.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cateterismo Cardíaco
/
Aumento de la Imagen
/
Ecocardiografía Tridimensional
/
Modelos Cardiovasculares
Idioma:
En
Revista:
IEEE Trans Biomed Eng
Año:
2001
Tipo del documento:
Article
País de afiliación:
Estados Unidos