The General Hospital Corporation;Massachusetts Institute of Technology
发明人:
Rajiv Gupta,Luis Fernando Velasquez-Garcia,Richard Lanza,Berthold K P Horn,Akintunde Ibitayo Akinwande
申请号：
US14400836
公开号：
US10068740B2
申请日:
2013.03.14
申请国别(地区):
US
年份:
2018
代理人:
摘要：
An x-ray source for use in Phase Contrast Imaging is disclosed. In particular, the x-ray source includes a cathode array of individually controlled field-emission electron guns. The field emission guns include very small diameter tips capable of producing a narrow beam of electrons. Beams emitted from the cathode array are accelerated through an acceleration cavity and are directed to a transmission type anode, impinging on the anode to create a small spot size, typically less than five micrometers. The individually controllable electron guns can be selectively activated in patterns, which can be advantageously used in Phase Contrast Imaging.
