Magneto-optic tracking of a flexible laparoscopic ultrasound transducer for laparoscope augmentation.
In abdominal surgery, a laparoscopic ultrasound transducer is commonly used to detect lesions such as metastases. The determination and visualization of position and orientation of its flexible tip in relation to the patient or other surgical instruments can be of much help to (novice) surgeons utilizing the transducer intraoperatively. This difficult subject has recently been paid attention to by the scientific community . Electromagnetic tracking systems can be applied to track the flexible tip. However, the magnetic field can be distorted by ferromagnetic material. This paper presents a new method based on optical tracking of the laparoscope and magneto-optic tracking of the transducer, which is able to automatically detect field distortions. This is used for a smooth augmentation of the B-scan images of the transducer directly on the camera images in real time.
Computer-Aided Medical Procedures (CAMP), TUM, Munich, Germany.
Marco
M
Feuerstein
Tobias
T
Reichl
Jakob
J
Vogel
Armin
A
Schneider
Hubertus
H
Feussner
Nassir
N
Navabi
D019160:Endosonography / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D020706:Laparoscopes; D008280:Magnetics / Q000295:instrumentation*; D055095:Optics and Photonics / Q000295:instrumentation*; D025321:Surgery, Computer-Assisted / Q000295:instrumentation* / Q000379:methods