Zhang Z, Williams B, Zheng Y, Lin H, Shen Y. Differentiating generic versus branded pharmaceutical tablets using ultra-high-resolution optical coherence tomography. Coatings. 2019 May 17;9(5):326.
https://www.mdpi.com/2079-6412/9/5/326
Abstract
Optical coherence tomography (OCT) has recently been demonstrated as a powerful tool to image through pharmaceutical film coatings. Majority of the existing systems can, however, resolve film coatings for thickness greater than 10 µm. Here we report on an ultra-high-resolution (UHR) OCT system, with 1 µm axial and 1.6 µm lateral resolutions, which can resolve thin coatings at approximately 4 µm. We further demonstrate a novel application of the system for differentiating generic and branded suppliers of paracetamol tablets.
