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Erschienen in: International Journal of Computer Assisted Radiology and Surgery 4/2013

01.07.2013 | Original Article

Mobile augmented reality for computer-assisted percutaneous nephrolithotomy

verfasst von: Michael Müller, Marie-Claire Rassweiler, Jan Klein, Alexander Seitel, Matthias Gondan, Matthias Baumhauer, Dogu Teber, Jens J. Rassweiler, Hans-Peter Meinzer, Lena Maier-Hein

Erschienen in: International Journal of Computer Assisted Radiology and Surgery | Ausgabe 4/2013

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Abstract

Purpose   

Percutaneous nephrolithotomy (PCNL) plays an integral role in treatment of renal stones. Creating percutaneous renal access is the most important and challenging step in the procedure. To facilitate this step, we evaluated our novel mobile augmented reality (AR) system for its feasibility of use for PCNL.

Methods   

A tablet computer, such as an iPad\(^{\circledR }\), is positioned above the patient with its camera pointing toward the field of intervention. The images of the tablet camera are registered with the CT image by means of fiducial markers. Structures of interest can be superimposed semi-transparently on the video images. We present a systematic evaluation by means of a phantom study. An urological trainee and two experts conducted 53 punctures on kidney phantoms.

Results   

The trainee performed best with the proposed AR system in terms of puncturing time (mean: 99 s), whereas the experts performed best with fluoroscopy (mean: 59 s). iPad assistance lowered radiation exposure by a factor of 3 for the inexperienced physician and by a factor of 1.8 for the experts in comparison with fluoroscopy usage. We achieve a mean visualization accuracy of 2.5 mm.

Conclusions   

The proposed tablet computer-based AR system has proven helpful in assisting percutaneous interventions such as PCNL and shows benefits compared to other state-of-the-art assistance systems. A drawback of the system in its current state is the lack of depth information. Despite that, the simple integration into the clinical workflow highlights the potential impact of this approach to such interventions.

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Fußnoten
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iKlip stand adapter, IK Multimedia Production, http://​www.​ikmultimedia.​com/​products/​iklip/​.
 
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3
Rebeck patient markers, Fobeck GbR, http://​fobeck.​com/​cms2/​en.
 
4
For a detailed specification, please refer to the manufacturer‘s website http://​www.​siemens.​com.
 
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Metadaten
Titel
Mobile augmented reality for computer-assisted percutaneous nephrolithotomy
verfasst von
Michael Müller
Marie-Claire Rassweiler
Jan Klein
Alexander Seitel
Matthias Gondan
Matthias Baumhauer
Dogu Teber
Jens J. Rassweiler
Hans-Peter Meinzer
Lena Maier-Hein
Publikationsdatum
01.07.2013
Verlag
Springer Berlin Heidelberg
Erschienen in
International Journal of Computer Assisted Radiology and Surgery / Ausgabe 4/2013
Print ISSN: 1861-6410
Elektronische ISSN: 1861-6429
DOI
https://doi.org/10.1007/s11548-013-0828-4

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