To increase the field of view for large objects in phase-contrast X-ray ima
ging, a large monolithic X-ray interferometer has been fabricated using an
available silicon ingot of diameter 10 cm. A performance study of this inte
rferometer has been carried out using a synchrotron X-ray source. The view
size of the interference pattern obtained with this interferometer was 25 m
m wide and 15 mm high and its visibility was 79%. Various structures of a s
liced human hepatocellular carcinoma were identified as necrosis, hemorrhag
ic necrosis, normal liver tissue and blood vessel. The performance of this
interferometer was sufficient for phase-contrast X-ray imaging.