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Technical Note: Evaluation of audiovisual biofeedback smartphone application for respiratory monitoring in radiation oncology
- Source :
- Medical physics, vol 47, iss 11, Med Phys
- Publication Year :
- 2020
- Publisher :
- eScholarship, University of California, 2020.
-
Abstract
- PurposeRadiation dose delivered to targets located near the upper abdomen or thorax are significantly affected by respiratory motion, necessitating large margins, limiting dose escalation. Surrogate motion management devices, such as the Real-time Position Management (RPM™) system (Varian Medical Systems, Palo Alto, CA), are commonly used to improve normal tissue sparing. Alternative to current solutions, we have developed and evaluated the feasibility of a real-time position management system that leverages the motion data from the onboard hardware of Apple iOS devices to provide patients with visual coaching with the potential to improve the reproducibility of breathing as well as improve patient compliance and reduce treatment delivery time.Methods and materialsThe iOS application, coined the Instant Respiratory Feedback (IRF) system, was developed in Swift (Apple Inc., Cupertino, CA) using the Core-Motion library and implemented on an Apple iPhone® devices. Operation requires an iPhone®, a three-dimensional printed arm, and a radiolucent projector screen system for feedback. Direct comparison between IRF, which leverages sensor fusion data from the iPhone®, and RPM™, an optical-based system, was performed on multiple respiratory motion phantoms and volunteers. The IRF system and RPM™ camera tracking marker were placed on the same location allowing for simultaneous data acquisition. The IRF surrogate measurement of displacement was compared to the signal trace acquired using RPM™ with univariate linear regressions and Bland-Altman analysis.ResultsPeriodic motion shows excellent agreement between both systems, and subject motion shows good agreement during regular and irregular breathing motion. Comparison of IRF and RPM™ show very similar signal traces that were significantly related across all phantoms, including those motion with different amplitude and frequency, and subjects' waveforms (all r>0.9, P&nbsp
- Subjects :
- Thorax
Cone beam computed tomography
gyroscope
Computer science
medicine.medical_treatment
Respiratory monitoring
Accelerometer
smartphone
Signal
Phantoms
030218 nuclear medicine & medical imaging
Imaging
0302 clinical medicine
Data acquisition
Psychology
Computer vision
Respiratory system
Phantoms, Imaging
Respiration
General Medicine
Other Physical Sciences
Nuclear Medicine & Medical Imaging
030220 oncology & carcinogenesis
4D CBCT
Breathing
Smartphone
Algorithms
RPM
respiratory motion
Movement
Oncology and Carcinogenesis
Biomedical Engineering
Biofeedback
Bioengineering
apple iOS application
Imaging phantom
Article
03 medical and health sciences
motion management
Clinical Research
medicine
Humans
Four-Dimensional Computed Tomography
sensor fusion
business.industry
Reproducibility of Results
Biofeedback, Psychology
equipment and supplies
accelerometer
Radiation Oncology
Artificial intelligence
business
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Medical physics, vol 47, iss 11, Med Phys
- Accession number :
- edsair.doi.dedup.....b5a5bf507d1c9ff5ce6c09077b80ff5e