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  • ultrasound
  • A mammogram (an X-ray of the breast) or an ultrasound scan (using high frequency sound waves) might be used to determine if there are any tumors or cysts present in the breasts themselves. (wikipedia.org)
  • analysis
  • To compare single estimations of fat-free mass (FFM) and to track FFM using single-frequency bioelectrical impedance analysis (BIA) and dual-energy X-ray absorptiometry (DXA) compared with a four-compartment (4C) model in healthy elderly Americans. (nih.gov)
  • uses
  • One type of DXA scanner uses a cerium filter with a tube voltage of 80 kV , resulting in effective photon energies of about 40 and 70 keV . (wikipedia.org)
  • high
  • Also, the tube voltage can be continuously switched between a low (for example 70 kV) and high (for example 140 kV) value in synchronism with the frequency of the electrical mains, resulting in effective energies alternating between 45 and 100 keV. (wikipedia.org)
  • With DXL technology, the region of interest is scanned using low and high energy x-rays as with a DXA scan. (wikipedia.org)
  • Siewerdsen began graduate studies at the University of Michigan in Ann Arbor, MI, in 1992, working initially in high-energy physics (D0 experiment) under supervision of Professor Homer Neal and earning his Master of Science degree in Physics in 1994. (wikipedia.org)
  • Benefits
  • Rebuffel, Véronique and Jean-Marc Dinten, "Dual-Energy Xray Imaging Benefits and Limits," Proceedings of the 9th European Conference on NDT (ECNDT), Berlin, September 2006. (asnt.org)
  • These people show benefits from energy restriction and weight loss, for example a 4- to 12-week period of diet and exercise. (wikipedia.org)
  • male
  • Mutant male mice showed increased activity, VO2 and energy expenditure, determined by indirect calorimetry. (wikipedia.org)
  • methods
  • Research in his laboratory focused on image-guided surgery, new imaging methods such as dual-energy imaging, and image registration. (wikipedia.org)
  • His research also extended cascaded systems models for x-ray imaging performance to describe 3D imaging performance in CBCT and helped to establish mathematical methods for imaging system optimization according to the imaging task.Siewerdsen joined Johns Hopkins Biomedical Engineering as an Associate Professor in 2009 and subsequently as a Professor in 2012, with cross-appointment in Computer Science, Radiology, and Neurosurgery. (wikipedia.org)