| 摘要 |
A system operable to track a respiratory cycle of a subject is provided. The system includes at least a first sensor positioned on the subject, and at least a second sensor located at a reference relative to a change in position of the first sensor associated with respiration of the subject. The system also includes a respiratory cycle measurement device coupled to receive the position data of the first sensor relative to the reference. The respiratory cycle measurement device is configured to translate the position data of the first sensor relative to time into a respiratory signal representative of a respiratory cycle of the subject.
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