Related Experiment Videos
Tracking and compensation of respiration pattern by an automatic compensation system
Lai-Lei Ting1, Ho-Chiao Chuang2, Chia-Chun Kuo1
1Department of Radiation Oncology, Taipei Medical University Hospital, No. 252, Wu-Hsing St., Taipei, 11031, Taiwan.
Medical Physics
|April 4, 2017
Summary
This study demonstrates a novel ultrasound tracking system that effectively compensates for diaphragm motion during respiration. The system achieved up to 88.92% compensation, improving accuracy in medical imaging.
Area of Science:
- Medical Imaging Technology
- Biomedical Engineering
- Radiation Oncology
Background:
- Respiration causes diaphragm motion, impacting the accuracy of medical imaging and radiation therapy.
- Real-time tracking and compensation of diaphragm motion are crucial for precise treatments.
Purpose of the Study:
- To evaluate the feasibility of an ultrasound image tracking algorithm (UITA) combined with a respiration compensating system (RCS) for real-time diaphragm motion tracking and compensation.
- To assess the effectiveness of the UITA-RCS system in various simulated and real-world respiration scenarios.
Main Methods:
- Utilized a previously developed UITA to track diaphragm motion in volunteers and a diaphragm phantom.
- Employed a respiration simulation system (RSS) and RCS with a linear actuator to simulate and compensate for respiration patterns.
- Validated displacements using a fluoroscopic imaging system and compared UITA-RSS measurements.
Main Results:
- Achieved a significant correlation (up to 91%) between UITA-calculated and actual diaphragm displacements.
- Demonstrated a compensation effect of over 65% with RCS, increasing to 85% with a phase-lead compensator (PLC).
- Observed compensation rates from 52% to 74% in human volunteers, with extreme patterns reaching 88.92% compensation using a PLC.
Conclusions:
- The combined UITA and RCS effectively offsets respiration-induced diaphragm displacement in real time.
- This noninvasive ultrasound imaging system can compensate for diverse respiration patterns, including those with baseline shifts.
- The technology shows promise for enhancing the accuracy of medical imaging and radiation therapy by mitigating respiratory motion artifacts.