Compact X-Ray Tube With Ceramic Vacuum Seal for Portable and Robust Dental Imaging

A portable x-ray source based on CNT for chest radiography

“…Figure 4 (B) shows the aged ceramic X-ray tube with ceramic discoloration along the anode line due to X-rays interaction with ceramic materials. The ceramic tube was brazed in vacuum furnace and details about the brazing process and vacuum sealing process can be found here [3]. The X-ray tube mainly consists of Anode, ceramic housing and electron gun (E-gun) parts.…”

“…We have published two publications in which ceramic-based X-ray tubes were made in smaller and more compact sizes than traditional glass X-ray tubes [3,4]. The X-ray tube was further reduced in size by employing a cold cathode electron emitter made of carbon nanotubes (CNTs).…”

A comparison of digital-based CNT and analogue-based filament x-ray source in regard to intraoperative specimen x-ray system’s development

“…Our research group have invested substantial time in these recent five years to fully develop the digital CNT-based X-ray source in the lab [1][2][3]. The X-ray sources can be both fabricated either using analogue-type filament E-gun or digital-type CNT E-guns [4][5][6]. For the specific application where our X-ray source can be beneficial, we have chosen the intraoperative specimen X-ray system (ISXS).…”

High-Performance Cold Cathode X-ray Tubes Using a Carbon Nanotube Field Electron Emitter

“…Recently, a cold cathode X-ray tube has much attention due to possibility of several advantages such as a high resolution, fast operation, digital operation, a small focal size, and low power consumption. Diverse approaches to fabricate cold cathode X-ray sources have been studied by adopting field electron emitters using various field emission materials such as semiconductor tips, carbon nanotubes (CNTs), and nanocarbon materials. − More recently, several research groups reported cold cathode X-ray tubes which can promise potential applications for various X-ray systems even though a history of cold cathode X-ray tubes is only a beginning stage. − Furthermore, some companies such as Shang Fang, Micro-X, Nanox, and CAT beamtech presented commercial cold cathode X-ray tubes using CNT paste emitters or as-grown CNT emitters or Si tip emitters and started to supply cold cathode X-ray tubes with various specifications in the market. Nevertheless, the cold cathode X-ray tubes still show a relatively low tube current and a large focal spot size, which indicates lower tube performance compared with conventional thermionic X-ray tubes.…”