We report the design and fabrication of a carbon nanotube (CNT) based micro-resolution field emission mobile open type x-ray system for breast imaging. It can be used efficiently during the surgery of breast cancer removal to obtain accurate resection margin in partial resection of breast specimen. The obtained x-ray image of breast specimen with the proposed system shows the clear detection of micro-calcifications.
We report the design and fabrication of a carbon nanotube based a glass-sealed field emission x-ray tube without vacuum
pump. The x-ray tube consists of four electrodes with anode, focuser, gate, and cathode electrode. The shape of cathode
is rectangular for isotropic focal spot size at anode target. The obtained x-ray images show clearly micrometer scale.
Computed Tomography (CT) using Carbon Nanotube (CNT) x-ray source is a technique of generating reconstruction
images of the structure of teeth sample. A proto type CNT x-ray CT was designed for medical imaging to examine
whether it could be used to analysis the equipment of medical and industrial application. The CNT field emitter array was grown on silicon substrate through a resist-assisted patterning (RAP) process. The field emission properties showed a gate turn-on field of 3.8 V/μm at an anode emission current of 0.5 mA. The author demonstrated the x-ray source with four electrode structures utilizing the CNT emitter. The acquisitioned images were reconstructed by filtered back projection (FBP) method.