Field emission arrays for medical x-ray imaging
Abstract
Experiments demonstrate the feasibility of using microfabricated cold field emission cathodes in x-ray sources for medical imaging. Electron beam currents of 25mA at voltages of 25kV have been used to produce x-ray source focal spot diameters of 0.2mm. Analysis of both filtered and unfiltered x-ray spectra from molybdenum anodes show clear characteristic x-ray lines. These x-ray source characteristics are consistent with the requirements for human breast imaging.
- Publication:
-
Applied Physics Letters
- Pub Date:
- March 2006
- DOI:
- 10.1063/1.2186388
- Bibcode:
- 2006ApPhL..88k3902S
- Keywords:
-
- 87.59.Ek;
- 85.45.Db;
- Mammography;
- Field emitters and arrays cold electron emitters