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PURPOSE To measure the sensitivity of deformable image registration to image noise. Deformable image registration can be used to map organ contours and other treatment planning data from one CT to another. These CT studies can be acquired with either conventional fan-beam CT systems or more novel cone-beam CT techniques. However, cone-beam CT images can(More)
S ince Thomas Malthus famously warned in 1798 that excessive population growth would inevitably outpace food production, a debate has raged between those who have subscribed to Malthusian pessimism and those who have believed that technological advance would keep ahead of population growth—and perhaps even be spurred by a larger population. Population(More)
  • Prashant Bharadwaj, Asim Khwaja, Atif Mian, Saugata Bose, Michael Boozer, David Clingingsmith +6 others
  • 2013
Large scale migrations, especially involuntary ones, can have a sudden and substantial impact on the demographics of both sending and receiving communities. The partition of the Indian subcontinent in 1947 resulted in one of the largest and most rapid population exchanges in human history. We compile census data to estimate its impact on a district's(More)
Real-time tumor targeting involves the continuous realignment of the radiation beam with the tumor. Real-time tumor targeting offers several advantages such as improved accuracy of tumor treatment and reduced dose to surrounding tissue. Current limitations to this technique include mechanical motion constraints. The purpose of this study was to investigate(More)
This study provides normative data about the cognitive functioning of 134 nonpsychiatric, non-neurological healthy elderly persons ranging from 60 to 85 years of age with the Neurobehavioral Cognitive Status Examination (Cognistat). Most areas of cognitive functioning remain grossly intact for all age levels. Construction and memory showed evidence of(More)
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