Joint Scene and Object Tracking for Cost-Effective Augmented Reality
Assisted Patient Positioning in Radiation Therapy
- URL: http://arxiv.org/abs/2010.01895v2
- Date: Mon, 11 Jan 2021 07:40:18 GMT
- Title: Joint Scene and Object Tracking for Cost-Effective Augmented Reality
Assisted Patient Positioning in Radiation Therapy
- Authors: Hamid Sarmadi, Rafael Mu\~noz-Salinas, M. \'Alvaro Berb\'is, Antonio
Luna, R. Medina-Carnicer
- Abstract summary: The research done in the field of Augmented Reality (AR) for patient positioning in radiation therapy is scarce.
We propose an efficient and cost-effective algorithm for tracking the scene and the patient to interactively assist the patient's positioning process.
- Score: 0.6299766708197884
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: BACKGROUND AND OBJECTIVE: The research done in the field of Augmented Reality
(AR) for patient positioning in radiation therapy is scarce. We propose an
efficient and cost-effective algorithm for tracking the scene and the patient
to interactively assist the patient's positioning process by providing visual
feedback to the operator. Up to our knowledge, this is the first framework that
can be employed for mobile interactive AR to guide patient positioning.
METHODS: We propose a point cloud processing method that combined with a
fiducial marker-mapper algorithm and the generalized ICP algorithm tracks the
patient and the camera precisely and efficiently only using the CPU unit. The
alignment between the 3D reference model and body marker map is calculated
employing an efficient body reconstruction algorithm. RESULTS: Our quantitative
evaluation shows that the proposed method achieves a translational and
rotational error of 4.17 mm/0.82 deg at 9 fps. Furthermore, the qualitative
results demonstrate the usefulness of our algorithm in patient positioning on
different human subjects. CONCLUSION: Since our algorithm achieves a relatively
high frame rate and accuracy employing a regular laptop (without the usage of a
dedicated GPU), it is a very cost-effective AR-based patient positioning
method. It also opens the way for other researchers by introducing a framework
that could be improved upon for better mobile interactive AR patient
positioning solutions in the future.
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