Depth estimation of protoporphyrin IX objects in turbid media considering the fluorescence intensity ratio between two wavelengths of light for application in invasion diagnosis of gastric cancer
Depth estimation of protoporphyrin IX objects in turbid media considering the fluorescence intensity ratio between two wavelengths of light for application in invasion diagnosis of gastric cancer
复制标题
考虑两个波长光之间的荧光强度比的浑浊介质中原卟啉IX物体的深度估计在胃癌侵袭诊断中的应用
DOI:
10.1007/s10043-022-00747-y
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发表时间:
2022
期刊:
影响因子:
1.2
通讯作者:
Awazu Kunio
中科院分区:
文献类型:
--
作者:
Imanishi Hinano;Nishimura Takahiro;Awazu Kunio
This paper demonstrates a method to estimate the depth of a fluorescence object in turbid media using dual-wavelength excited photodynamic diagnosis, to aid in the invasion depth diagnosis of gastric cancer. The treatment method for gastric cancer is determined by its invasion depth, which is difficult to measure in situ during endoscopic diagnosis. Therefore, a method that can quantitatively diagnose tumor depth using a simple optical system that can be utilized with an endoscope is required. In the proposed method, the depth of a fluorescence object in a turbid medium is estimated by considering the optical propagation of two wavelengths of excitation light and absorption properties of protoporphyrin IX. In our experiments, we evaluated the estimation accuracy of the fluorescence object depth in a tissue-mimicking phantom from a fluorescence intensity ratio during fluorescence observation based on the calibration curve obtained from prior numerical calculation. The results of the fluorescence observation experiment showed that the depth of the fluorescence object could be estimated with an error of less than 0.3 mm within 2 mm from the surface.
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