Relativistic impulse approximation-based compton component of mass energy absorption coefficients (cm/g) for few materials of medical interest.

Total, whole-atom, individual and integrated Compton scattering cross sections and Compton energy absorption scattering cross sections are evaluated for light elements, such as, H, C, N, O, P, and Ca, with relativistic impulse approximation methods. Most of the phantom materials composed of these elements, which are the basic constituents of biological soft-tissue and attenuation through them, provides potential source of information. Compton scattering cross-sections for few biological materials, such as, HO, CH, CH, CHO, CHNO, CHO, CHO, [Ca(PO)]Ca (OH) of medical interest, have been evaluated with the use of double differential scattering cross-section based on impulse approximation.

Embedded soft-tissue image mechanism of a small animal shell with synchrotron-based micro-CT.

Synchrotron-based micro-CT was utilized to image the embedded biological soft-tissue of a small animal shell. Micro-CT images of the biological soft-tissue were acquired using 20, 25, and 27 keV synchrotron X-rays with contrast agents, such as water, physiological saline and iodine. Visualized the complex features of the animal at the above energies with water, physiological saline and iodine.

Synchrotron-based DEI for bio-imaging and DEI-CT to image phantoms with contrast agents.

The introduction of water, physiological, or iodine as contrast agents is shown to enhance minute image features in synchrotron-based X-ray diffraction radiographic and tomographic imaging. Anatomical features of rat kidney, such as papillary ducts, ureter, renal artery and renal vein are clearly distinguishable. Olfactory bulb, olfactory tact, and descending bundles of the rat brain are visible with improved contrast.

Synchrotron-based scattered radiation from phantom materials used in X-ray CT.

Synchrotron-based scattered radiation form low-contrast phantom materials prepared from polyethylene, polystyrene, nylon, and Plexiglas is used as test objects in X-ray CT was examined with 8, 10 and 12 keV X-rays. These phantom materials of medical interest will contains varying proportions of low atomic number elements. The assessment will allowed us to estimate the fluorescence to total scattered radiation.

Use of synchrotron-based diffraction-enhanced imaging for visualization of soft tissues in invertebrates.

Images of terrestrial and marine invertebrates (snails and bivalves) have been obtained by using an X-ray phase-contrast imaging technique, namely, synchrotron-based diffraction-enhanced imaging. Synchrotron X-rays of 20, 30 and 40keV were used, which penetrate deep enough into animal soft tissues. The phase of X-ray photons shifts slightly as they traverse an object, such as animal soft tissue, and interact with its atoms.

[Phase-contrast x-ray imaging with x-ray interferometer for medical applications].

Phase-contrast x-ray imaging with x-ray interferometer can depict the minute difference within the biological object, and its sensitivity is about 1000 times higher than that of absorption-contrast method. For biomedical use of this technique, a large monolithic x-ray interferometer and 2 crystal interferometer having a field of view with 25 mm x 25 mm is being developed. Phase-contrast x-ray CT could reveal detail structures within tumor and surrounded tissue, and the vessel imaging of rat liver is also possible using physiological saline at 17.