Abstract:
PURPOSE:An augmented reality system to visualize a 3D preoperative anatomical model on intra-operative patient is proposed. The hardware requirement is commercial tablet-PC equipped with a camera. Thus, no external tracking device nor artificial landmarks on the patient are required. METHODS:We resort to visual SLAM to provide markerless real-time tablet-PC camera location with respect to the patient. The preoperative model is registered with respect to the patient through 4-6 anchor points. The anchors correspond to anatomical references selected on the tablet-PC screen at the beginning of the procedure. RESULTS:Accurate and real-time preoperative model alignment (approximately 5-mm mean FRE and TRE) was achieved, even when anchors were not visible in the current field of view. The system has been experimentally validated on human volunteers, in vivo pigs and a phantom. CONCLUSIONS:The proposed system can be smoothly integrated into the surgical workflow because it: (1) operates in real time, (2) requires minimal additional hardware only a tablet-PC with camera, (3) is robust to occlusion, (4) requires minimal interaction from the medical staff.
journal_name
Int J Comput Assist Radiol Surgauthors
Mahmoud N,Grasa ÓG,Nicolau SA,Doignon C,Soler L,Marescaux J,Montiel JMdoi
10.1007/s11548-016-1444-xsubject
Has Abstractpub_date
2017-01-01 00:00:00pages
1-11issue
1eissn
1861-6410issn
1861-6429pii
10.1007/s11548-016-1444-xjournal_volume
12pub_type
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