To investigate the ability of hard x-ray phase contrast imaging with synchrotron radiation (SR-PCI) in demonstrating gastric micro-structures in vitro.
Material and methods
Six gastric specimens of patients with gastric cancer were fixed in formalin for 2-7 days. Then the non-cancerous part was taken, the mucosa layer was dissection and performed SR-PCI examination with cancer together. The synchrotron hard x-ray came from 4W1A beamline of Beijing Synchrotron Radiation Facility (BSRF). All specimens were imaged with in-line holography and diffraction-enhanced imaging(DEI). Double-crystal monochrometer Si (111) was employed to obtain the coherence and...
On in-line holography: Gastric grooves appeared bright lines, divided the mucosa into irregular areas, namely areae gastricae. Foveolae gastricae appeared small round bright dot, grouped or stripped together in areae gastricae. The size of foveolae gastricae was even, and the diameters were 50-100µm. Blood vessels of submucosa can be demonstrated. On DEI: It showed delicate 3D images of foveolae gastricae. Micro blood vessels of cancer whose diameter measured dozens of µm can be showed...
SR-PCI can demonstrate the tiny architecture of gastric wall as well as gastric cancer.
Kitchen MJ, Lewis RA, Yagi N, e t al. Phase contrast X-ray imaging of mice and rabbit lungs: a comparative study. Br J Radiol. 2005; 78(935):1018-27. Meuli R, Hwu Y, Je JH, et al. Synchrotron radiation in radiology: radiology techniques based on synchrotron sources. Eur Radiol. 2004;14(9):1550-60.
XiaoPeng Zhang, Professor of Peking University; Director of radiology department, Peking University School & Beijing Cancer Hospital Lei Tang, Doctor Candidate of Peking University Gang Li, Doctor of Chinese Academy of Sciences YingShi Sun, Doctor Candidate of Peking University Jie Li, Doctor Candidate of Peking University