Search results

1

Current concepts and applications of computer navigation in orthopedic trauma surgery

100%

Kendoff D., Citak M., Hüfner T., Chaudhary S., Krettek C.

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2007

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vol. 2

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issue 4

392-403

EN

Navigation has become widely integrated into regular endoprosthetic procedures, but clinical use of navigation systems in orthopaedic trauma has only been implemented in a few indications. Navigation systems enable an accuracy of 1 mm or 1 degree. Navigation can achieve higher precision when it is combined with different imaging modalities, including preoperative computer tomography (CT), intraoperative CT, two-dimensional fluoroscopy, and, recently, intraoperative three-dimensional fluoroscopy. The precision of the navigation system can be influenced by the surgeon as well as by the camera system, type of reference marker, and the registration process. Recent developments in orthopedic trauma navigation allow for bilateral femoral anteversion measurements, noninvasive registration of an uninjured thigh, and intraoperative three-dimensional fluoroscopy-based pedicle screw placement. Although the use of navigation has provided initial positive results in trauma care, prospective clinical studies remain to be performed.

2

Image-to-patient registration by natural anatomical surfaces of the head

88%

Marmulla R., Mühling J., Eggers G.

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2007

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vol. 2

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issue 1

89-102

EN

The use of registration markers in computer-assisted surgery is combined with high logistic costs and efforts. During the preparation of image guided surgery, automated markerless patient-to-image registration based on anatomical surfaces allows a significant reduction of preoperative effort and of the radiation dose the patient is exposed to. Placement and measurement of radio-opaque fiducial markers becomes unnecessary. The usability of face, auricle, maxilla and mandible for surface-based registration to CT image data was investigated. The present study was performed to evaluate the clinical accuracy in finding defined target points within the surgical site after markerless patient registration in image-guided oral and maxillofacial surgery. Preoperatively, the spatial position of 20 patients was registered to CT image data using a 3D laser surface scanner. Indications for surgery were tumours, foreign bodies and skeletal malformations. The accuracy of this surface-based registration was verified using additionally placed fiducial markers. The study showed, that markerless surface-based registration was sufficiently accurate for clinical use when the surface used for matching was the upper jaw, the face, or - with reservations - the auricle. Surface-based registration using the mandible did not yield satisfying results. To conclude, image-to-patient registration based on laser surface scanning is a valuable method for surgery of the head. Multiple sites of the head were identified as appropriate for the method. Hence, dependent on the individual case and the intended surgery, the registration area can be selected with the necessary flexibility.

3

Comparison of algorithms for satellite attitude determination using data from visual sensors

88%

Narkiewicz J., Sochacki M., Rodacki A., Grabowski D., Narkiewicz J., Sochacki M., Rodacki A., Grabowski D.

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2021

4

Inertial Navigation Static Calibration

88%

Niespodziany S.

International Journal of Electronics and Telecommunications

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2018

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vol. 64

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issue 2

5

Start Acceleration of the Space GPS Receiver

88%

Kovář P., Kovář P.

International Journal of Electronics and Telecommunications

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2020

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vol. 66

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issue 4

6

Navigation of humanoids by a hybridized regression-adaptive particle swarm optimization approach

75%

Kumar P. B., Sahu C., Parhi D. R.

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issue 3

7

Mobile Navigation System for Visually Impaired Users in the Urban Environment

75%

Kamiński Ł., Bruniecki K.

Metrology and Measurement Systems

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2012

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issue 2

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1 Bruniecki K.

1 Chaudhary S.

1 Citak M.

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1 Grabowski D.

1 Hüfner T.

1 Kamiński Ł.

1 Kendoff D.

1 Kovář P.

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1 Kumar P. B.

1 Marmulla R.

1 Mühling J.

1 Narkiewicz J.

1 Niespodziany S.

1 Parhi D. R.

1 Rodacki A.

1 Sahu C.