Electronic Brachytherapy: Comparisons With External-Beam and High-Dose-Rate 192Ir Brachytherapy  Mahadevappa Mahesh, MS, PhD, Nicholas Detorie, PhD, Randall W. Holt, PhD, Mark J. Rivard, PhD  Journal of the American College of Radiology  Volume 5, Issue 3, Pages 221-223 (March 2008) DOI: 10.1016/j.jacr.2007.12.001 Copyright © 2008 American College of Radiology Terms and Conditions

Fig 1 The Xoft model s700 miniature x-ray source operates at up to 50 kVp and 300 μA and is similar in size and dose rate than a radioactive high-dose-rate 192Ir source. Photo courtesy of Xoft, Inc (Fremont, California). Journal of the American College of Radiology 2008 5, 221-223DOI: (10.1016/j.jacr.2007.12.001) Copyright © 2008 American College of Radiology Terms and Conditions

Fig 2 Detail of the Xoft model s700 x-ray source. The high-voltage (HV) cable (purple) creates a 50 kVp potential between the cathode (green) and the anode (blue). Electrons emitted from the filament (green) accelerate down a vacuum tube (yellow) to impact the tungsten target (red) and release x-rays. Heat generated by the 15 W process is carried away by the encapsulating cooling sheath (gray). Diagram courtesy Xoft, Inc. (Fremont, California). Journal of the American College of Radiology 2008 5, 221-223DOI: (10.1016/j.jacr.2007.12.001) Copyright © 2008 American College of Radiology Terms and Conditions