Smartphone Augmented Reality CT-Based Platform for Needle Insertion Guidance: A Phantom Study

Objective To develop and assess the accuracy of an augmented reality (AR) needle guidance smartphone application. Methods A needle guidance AR smartphone application was developed using Unity and Vuforia SDK platforms, enabling real-time displays of planned and actual needle trajectories. To assess...

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Bibliographic Details
Published in:Cardiovascular and interventional radiology 2020-05, Vol.43 (5), p.756-764
Main Authors: Hecht, Rachel, Li, Ming, de Ruiter, Quirina M. B., Pritchard, William F., Li, Xiaobai, Krishnasamy, Venkatesh, Saad, Wael, Karanian, John W., Wood, Bradford J.
Format: Article
Language:English
Subjects:
Ablation
Accuracy
Augmented Reality
Cardiology
Computed tomography
Humans
Hypodermic needles
Imaging
Insertion
Laboratory Investigation
Medical imaging
Medicine
Medicine & Public Health
Mobile Applications
Needles
Nuclear Medicine
Phantoms, Imaging
Physicians
Placement
Radiation
Radiation effects
Radiography, Interventional - methods
Radiology
Reproducibility of Results
Smartphone
Smartphones
Tomography, X-Ray Computed - methods
Trajectory analysis
Ultrasound
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Summary:Objective To develop and assess the accuracy of an augmented reality (AR) needle guidance smartphone application. Methods A needle guidance AR smartphone application was developed using Unity and Vuforia SDK platforms, enabling real-time displays of planned and actual needle trajectories. To assess the application’s accuracy in a phantom, eleven operators (including interventional radiologists, non-interventional radiology physicians, and non-physicians) performed single-pass needle insertions using AR guidance ( n  = 8) and CT-guided freehand ( n  = 8). Placement errors were measured on post-placement CT scans. Two interventional radiologists then used AR guidance ( n  = 3) and CT-guided freehand ( n  = 3) to navigate needles to within 5 mm of targets with intermediate CT scans permitted to mimic clinical use. The total time and number of intermediate CT scans required for successful navigation were recorded. Results In the first experiment, the average operator insertion error for AR-guided needles was 78% less than that for CT-guided freehand (2.69 ± 2.61 mm vs. 12.51 ± 8.39 mm, respectively, p 
ISSN:0174-1551
1432-086X
DOI:10.1007/s00270-019-02403-6