On-patient see-through augmented reality based on visual SLAM.

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.

authors

Mahmoud N,Grasa ÓG,Nicolau SA,Doignon C,Soler L,Marescaux J,Montiel JM

doi

10.1007/s11548-016-1444-x

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

1-11

issue

1

eissn

1861-6410

issn

1861-6429

pii

10.1007/s11548-016-1444-x

journal_volume

12

pub_type

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