| 摘要 |
The technology described in this document can be embodied in a method that includes receiving optical data including information associated with a subject, and determining from the optical data, a first dataset and a second dataset. The first dataset represents time-varying color change at a first body part of the subject, and the second dataset represents time-varying characteristics at a second body part of the subject. The method includes identifying a first point in the first dataset, and a second point in the second dataset. The first point represents a time at which a pulse pressure wave traverses the first body part of the subject, and the second point represents a time at which the pulse pressure wave traverses the second body part of the subject. A pulse transit time (PTT) between the first and second body parts can be calculated as a difference between the first and second points. |
| 主权项 |
1. A computer-implemented method comprising:
receiving, at one or more processing devices, optical data including information associated with a subject; determining, by the one or more processing devices from the optical data, a first dataset representing time-varying color change at a first body part of the subject; determining, by the one or more processing devices from the optical data, a second dataset representing time-varying characteristics at a second body part of the subject; identifying, by the one or more processing devices, a first point in the first dataset, the first point representing a time at which a pulse pressure wave traverses the first body part of the subject; identifying, by the one or more processing devices, a second point in the second dataset, the second point representing a time at which the pulse pressure wave traverses the second body part of the subject; and computing a pulse transit time (PTT) as a difference between the first and second points, the PTT representing a time taken by the pulse pressure wave to travel from the second body part to the first body part of the subject. |
