@article{DBLP:journals/cars/TabrizSPD11,
  author    = {David M. Tabriz and
               Mandie Street and
               Thomas K. Pilgram and
               James R. Duncan},
  title     = {Objective assessment of operator performance during ultrasound-guided
               procedures},
  journal   = {Int. J. Computer Assisted Radiology and Surgery},
  volume    = {6},
  number    = {5},
  year      = {2011},
  pages     = {641-652},
  ee        = {http://dx.doi.org/10.1007/s11548-010-0541-5},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}