| 摘要 |
An apparatus, and method embodying the invention include utilizing a device intended to be inserted into a patient's body to determine a characteristic of a target tissue (50). In one apparatus and method a device illuminates the target tissue with amplitude modulated excitation electromagnetic radiation, and the device senses a returned electromagnetic radiation. A phase shift between the excitation, and return electromagnetic radiation is determined, and the phase shift is used to determine characteristics of the target tissue. A demodulation factor representing ratios of the AC and DC components of the excitation, the return electromagnetic radiation may also be calculated, and used to determine characteristics of the target tissue. In another apparatus, and method embodying the invention, a device illuminates a target tissue with polarized electromagnetic radiation, and a return electromagnetic radiation is sensed.
|
