Technology Talk published in the Journal of the American College of Radiology (JACR)
From the journal abstract:
The past decade has witnessed significant growth in applications of stereotactic body radiation therapy (SBRT), which involves delivering tumoricidal doses of radiation in as few as 1 to 5 fractions to tumors in the head and neck, lung, liver, pancreas, spine, and prostate, with very high (80%-98%) local control rates reported in a variety of studies.
The increase in SBRT procedures can be largely attributed to the advent of on-board localization technologies that include single and stereoscopic x-ray imaging, kilovoltage and megavoltage CT imaging, implantable fiducial transponders, ultrasound imaging, and others.
Read the entirety of the publication at http://www.jacr.org/article/S1546-1440(10)00503-X/abstract