Imaging cells and tissues with refractive index radiology (2006)
Hwu, Y., Tsai, W. L., Chang, H. M., Yeh, H. I., Hsu, P. C., Yang, Y. C., ...
Can individual cells, including live cells, be imaged using hard x rays? Common wisdom until now required sophisticated staining techniques for this task. We show instead that individual cells and...
Seol, S. K., Yi, J. M., Jin, X., Kim, C. C., Je, J. H., Tsai, W. L., ...
Localized electrochemical deposition (LECD) is an emerging technology for inexpensive and effective fabrication of high-aspect-ratio microstructure of diverse materials. Microradiology with coherent...
Synchrotron microangiography with no contrast agent (2006)
Hwu, Y., Tsai, W. L., Je, J. H., Seol, S. K., Kim, B., Groso, A., ...
Coherent x-rays from synchrotron sources are increasingly used in non-conventional radiological techniques ('phase-contrast' radiology). Our experiments demonstrate that by using white...
Gutkin, M. Y., Sheinerman, A. G., Argunova, T. S., Mokhov, E. N., Je, J. H., Hwu, Y., ...
By using synchrotron radiation phase sensitive radiography we have examined the reactions of screw superdislocations or micropipes in silicon carbide single crystals: bundling, twisting, and...
Coherence-enhanced synchrotron radiology: Refraction versus diffraction mechanisms (2006)
Hwu, Y., Hsieh, H. H., Lu, M. J., Tsai, W. L., Lin, H. M., Goh, W. C., ...
Tests performed in different regimes reveal the interplay of two edge-enhancement mechanisms in radiological images taken with coherent synchrotron light. The relative weight of the two mechanisms,...
The development and application of imaging EXAFS spectromicroscopy (2006)
Hwu, Y., Tsai, W. L., Chang, L. W., Chen, C. H., Wu, C. C., Noh, D. Y., ...
The capability to perform absorption spectroscopy with hard x-rays was added to the synchrotron imaging spectromicroscopy technique. We present several successful test cases. First, the EXAFS...
Use of photoelectron microscopes as X-ray detectors for imaging and other applications (2006)
Hwu, Y., Tsai, W. L., Lai, B., Mancini, D. C., Je, J. H., Noh, D. Y., ...
We demonstrate with practical tests that a photoelectron emission microscope (PEEM) can be advantageously used as a high-lateral-resolution detector of X-rays. The advantages of this approach are...
Collimation-enhanced micro-radiography in real-time (2006)
Hwu, Y., Tsai, W. L., Hsieh, H. H., Je, J. H., Kang, H. S., Kim, I. W., ...
Highly collimated synchrotron sources are the essential ingredient of novel radiology and micro-radiology techniques for materials science. medicine and biology-with contrast based on the refractive...
Using photoelectron emission microscopy with hard-X-rays (2006)
Hwu, Y., Tsai, W. L., Lai, B., Je, J. H., Fecher, G. H., Bertolo, M., ...
We present several successful test cases of using photoelectron emission microscopy (PEEM) for photon energy up to 25 keV. First, the full extended X-ray absorption fine structure analysis was...
Synchrotron radiography and x-ray topography studies of hexagonal habitus SiC bulk crystals (2006)
Argunova, T. S., Gutkin, M. Y., Je, J. H., Kang, H. S., Hwu, Y., Tsai, W. L., ...
Phase-sensitive synchrotron radiation (SR) radiography was combined with x-ray diffraction topography to study structural defects of SiC crystals. The particular bulk SiC crystals examined had a low...
Dispersive coherence-enhanced radiology: Experimental test and modeling (2006)
Groso, A., Margaritondo, G., Hwu, Y., Tsai, W. L., Je, J. H., Lai, B.
Can the photon energy dependence of coherence-enhanced radiographs lead to elemental identification? Our tests pave the way to a positive response by showing that image details do change as the...
Photon energy dependence of phase contrast synchrotron light imaging (2006)
Groso, A., Margaritondo, G., Hwu, Y., Tsai, W. L., Je, J. H., Lai, B.
The changes in phase contrast X-ray images as the photon energy is changed were observed and analyzed. Such results were justified in part with a preliminary model based on the interplay of...
Coherence-enhanced synchrotron radiology: simple theory and practical applications (2006)
Hwu, Y., Tsai, W. L., Groso, A., Margaritondo, G., Je, J. H.
The advanced characteristics of synchrotron x-ray sources make it possible to implement radiology with powerful and innovative approaches. We review in simple terms the conceptual background of such...
Synchrotron radiation Imaging of internal structures in live animals (2006)
Lee, K. H., Hwu, Y., Je, J. H., Tsai, W. L., Choi, E. W., Kim, Y. C., ...
Ionizing radiation has long been used in medicine since the discovery of X-rays. Diagnostic imaging using synchrotron radiation has been under investigation since Rubenstein et al. reported...
Electrochemistry - Building on bubbles in metal electrodeposition (2006)
Tsai, W. L., Hsu, P. C., Hwu, Y., Chen, C. H., Chang, L. W., Je, J. H., ...
Micropipe evolution in silicon carbide (2006)
Gutkin, M. Y., Sheinerman, A. G., Argunova, T. S., Mokhov, E. N., Je, J. H., Hwu, Y. K., ...
Micropipe bundling and twisting in SiC crystals was revealed using synchrotron x-ray phase sensitive radiography. The computer simulation of micropipe evolution during the crystal growth suggests...
Real-time observation of Zn electro-deposition with high-resolution microradiology (2006)
Tsai, W. L., Hsu, P. C., Hwu, Y., Chen, C. H., Chang, L. W., Je, J. H., ...
We used phase contrast radiography to study the electro-deposition of Zn in real time and with high lateral resolution. Using unmonochromatic synchrotron X-rays and an optics-less imaging setup, we...
Edge-enhanced radiology with broadband synchrotron X-rays (2006)
Tsai, W. L., Hsu, P. C., Hwu, Y., Je, J. H., Ping, Y., Moser, H. O., ...
Broadband synchrotron X-rays with limited coherence can be used for high resolution phase contrast radiology. Our experimental results confirm the prediction that the extreme spatial coherence of...
Tsai, W. L., Hwu, Y., Chen, C. H., Chang, L. W., Je, J. H., Lin, H. M., ...
Phase contrast radiology using unmonochromatic synchrotron X-ray successfully imaged the grain boundaries of Al and AlZn alloy without contrast agent. Combining the high penetration of X-ray and the...
Phase contrast radiology in materials science (2006)
Hwu, Y., Tsai, W. L., Groso, A., Margaritondo, G., Je, J. H.
Coherent synchrotron sources open the way to powerful new radiology approaches. We briefly review the conceptual background of such approaches, then we present some examples of applications with...
Jung, H. J., Kim, H. J., Kim, E. K., Hong, J. O., Je, J. H., Hwu, Y. K., ...
A simple imaging setup based on the principle of coherence-based contrast X-ray imaging with unmonochromatized synchrotron radiation was used for studying mammographic phantom and human breast...
Imaging Cells and Tissues with Refractive Index Radiology
Hwu, Y., Tsai, W. L., Chang, H. M., Yeh, H. I., Hsu, P. C., Yang, Y. C., ...
Can individual cells, including live cells, be imaged using hard x rays? Common wisdom until now required sophisticated staining techniques for this task. We show instead that individual cells and...
Imaging Cells and Tissues with Refractive Index Radiology
Hwu, Y., Tsai, W. L., Chang, H. M., Yeh, H. I., Hsu, P. C., Yang, Y. C., ...
Can individual cells, including live cells, be imaged using hard x rays? Common wisdom until now required sophisticated staining techniques for this task. We show instead that individual cells and...