21 May 2015 Design and fabrication of an endomicroscopic imaging module for minimally invasive medical devices
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Medical imaging is an important part of diagnosis. The procedure should provide valuable information for diagnosis and, at the same time, should be minimally invasive for the patient. Therefore, when performing endoscopic imaging a system with reduced dimensions is crucial. The performance of imaging systems, used in several diagnosis endoscopic procedures, would highly benefit from the integration of an endomicroscopic imaging module (ENIM) able to perform in-vivo and real-time tissue microscopy. This paper proposes a miniaturized ENIM: its total length is 12.164 mm and has a lateral lens assembly of 3.894 mm. A microfabricated PDMS lens was included in the system, obtained by a hanging droplet approach, a very-low cost and effective method. A paraxial magnification of 14 times was achieved with a Modulation Transfer Function (MTF) around 38% at 50 lp/mm and maximum distortion about 1.8%.
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C. G. Costa, C. G. Costa, J. S. Gomes, J. S. Gomes, R. F. Wolffenbuttel, R. F. Wolffenbuttel, J. H. Correia, J. H. Correia, "Design and fabrication of an endomicroscopic imaging module for minimally invasive medical devices", Proc. SPIE 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems, 95170L (21 May 2015); doi: 10.1117/12.2178866; https://doi.org/10.1117/12.2178866


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