title: Synchronized navigation of current and prior studies using image registration improves radiologist's efficiency.
abstract: OBJECTIVE
  The purpose of this study was to investigate how the use of multi-modal rigid image registration integrated within a standard picture archiving and communication system affects the efficiency of a radiologist while performing routine interpretations of cases including prior examinations.
  
  
  METHODS
  Six radiologists were recruited to read a set of cases (either 16 neuroradiology or 14 musculoskeletal cases) during two crossover reading sessions. Each radiologist read each case twice, one time with synchronized navigation, which enables spatial synchronization across examinations from different study dates, and one time without. Efficiency was evaluated based upon time to read a case and amount of scrolling while browsing a case using Wilcoxon signed rank test.
  
  
  RESULTS
  Significant improvements in efficiency were found considering either all radiologists simultaneously, the two sections separately and the majority of individual radiologists for time to read and for amount of scrolling. The relative improvement for each individual radiologist ranged from 4 to 32% for time to read and from 14 to 38% for amount of scrolling.
  
  
  CONCLUSIONS
  Image registration providing synchronized navigation across examinations from different study dates provides a tool that enables radiologists to work more efficiently while reading cases with one or more prior examinations.
authors.affiliation: Sectra AB, Teknikringen 20, 583 30, Linköping, Sweden. daniel.forsberg@sectra.com.|Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA. daniel.forsberg@sectra.com.
authors.forename: Daniel
authors.identifier: http://orcid.org/0000-0003-0908-9470
authors.initials: D
authors.lastname: Forsberg
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Amit
authors.initials: A
authors.lastname: Gupta
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Christopher
authors.initials: C
authors.lastname: Mills
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Brett
authors.initials: B
authors.lastname: MacAdam
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Beverly
authors.initials: B
authors.lastname: Rosipko
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Bangert
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Michael D
authors.initials: MD
authors.lastname: Coffey
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Christos
authors.initials: C
authors.lastname: Kosmas
authors.affiliation: Department of Radiology, Case Western Reserve University and University Hospitals Case Medical Center, Cleveland, OH, USA.
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Sunshine
mesh_terms: D004526:Efficiency; D006801:Humans; D000072177:Radiologists; D011873:Radiology Information Systems
keywords: Efficiency; Image registration; PACS; Synchronized navigation