Seminars Archive

X-ray Grating Interferometry for Phase Imaging ―Recent Activities in Japan―

Abstract
X-ray grating interferometry is an emerging technology for X-ray phase imaging, which has remarkable flexibilities for the implementation with not only synchrotron radiation but also laboratory sources. In 2002, we started developing X-ray Talbot interferometry, which consists of two transmission gratings. The fabrication of amplitude gratings is crucial because a high aspect-ratio structure is needed, and our gratings are fabricated mainly by X-ray lithography and gold electroplating at NewSUBARU. Using synchrotron radiation, we have recently expanded this method to X-ray phase laminography, phase-sensitive X-ray microscopy, high-speed X-ray phase imaging, and four-dimensional X-ray phase tomography. Using laboratory sources, we are collaborating with a medical company and medical doctors. In this project, we aim at early-stage diagnoses of articular rheumatism and breast cancer. Prototypes have been installed in hospitals and used by the medical doctors with donated human bodies and cancerous tissues excised by treatment. The laboratory system is also used for exploring applications to non-destructive investigation. I will introduce the imaging principles with new results.