Light scattering pattern from ellipsoidal particle is reconstructed using digital holographic microscopy. 3D orientation of ellipsoidal particle, which is essential for 3D dynamics analysis, can be measured.   내용 보기

  Cell types of erythrocytes should be identified because they are closely related to their functionality and viability. In this study, we proposed a new label-free sensor for automatic identification of erythrocyte cell types using a digital in-line holographic microscopy (DIHM) combined with machine learning algorithms. A total of 12 features is quantitatively obtained from numerically reconstructed holographic images. With the aid of these machine learning algorithms, the extracted features are effectively utilized to distinguish erythrocytes. Among the four tested algorithms, ...   내용 보기

 Subcutaneous injection of drug solution is widely used for continuous and low dose drug treatment. Although the drug injections have been administered for a long time, challenges in the design of injection devices are still needed to minimize the variability, pain, or skin disorder by repeated drug injections. To avoid these adverse effects, systematic study on the effects of injection conditions should be conducted to improve the predictability of drug effect. Here, the effects of injection conditions on the drug diffusion in tissues were investigated using X-ray imaging techniq...   내용 보기

 The effect of stenotic deformation on the flow characteristics of the deformable stenosis was investigated experimentally under pulsatile flow condition. The phasic shape variation enhances the increasing rate of the jet velocity, which in turn causes the high increasing rate of the TKE production rate as compared with that in rigid stenosis models. This phenomenon induces the phase delay of the peak position in the waveform related with the pressure drop across the stenosis.   내용 보기

 X-ray PIV technique has been used as a non-invasive measurement modality to investigate the hemodynamic features of blood flow. However, the extraction of 2D velocity field data from the 3D volumetric information contained in X-ray images is technically unclear. In this study, we propose a new 2D velocity field extraction technique to overcome technological limitations.   To resolve with the problem of finding correction coefficient, the velocity field information obtained by X-ray PIV and micro PIV techniques for disturbed flow in a concentric stenosis with 50% severity...   내용 보기