| 摘要 |
An exemplary implantable device includes an emitter to emit radiation to illuminate a portion of the stomach and a detector to detect emitted radiation reflected by the portion of the stomach where a contraction of the stomach alters the reflected radiation. For example, during contraction, blood is excluded from the contracting region of the stomach and the stomach becomes less red in color. An exemplary method includes illuminating a portion of the gastrointestinal tract, detecting a change in illumination received by a detector where the change in illumination is responsive to a contraction of the gastrointestinal tract. Various other methods, devices, systems, etc., are also disclosed.
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