title: Investigation of viewing procedures for interpretation of breast tomosynthesis image volumes: a detection-task study with eye tracking.
abstract: OBJECTIVE
  To evaluate the efficiency of different methods of reading breast tomosynthesis (BT) image volumes.
  
  
  METHODS
  All viewing procedures consisted of free scroll volume browsing and three were combined with initial cine loops at three different frame rates (9, 14 and 25 fps). The presentation modes consisted of vertically and horizontally orientated BT image volumes. Fifty-five normal BT image volumes in mediolateral oblique view were collected. In these, simulated lesions were inserted, creating four unique image sets, one for each viewing procedure. Four observers interpreted the cases in a free-response task. Time efficiency, visual attention and search were investigated using eye tracking.
  
  
  RESULTS
  Horizontally orientated BT image volumes were read faster than vertically when using free scroll browsing only and when combined with fast cine loop. Cine loops at slow frame rates were ruled out as inefficient.
  
  
  CONCLUSIONS
  In general, horizontally oriented BT image volumes were read more efficiently. All viewing procedures except for slow frame rates were promising when assuming equivalent detection performance.
authors.affiliation: Diagnostic Radiology, Lund University, Skåne University Hospital, 205 02 Malmö, Sweden. Pontus.timberg@med.lu.se
authors.forename: Pontus
authors.initials: P
authors.lastname: Timberg
authors.forename: Kristina
authors.initials: K
authors.lastname: Lång
authors.forename: Marcus
authors.initials: M
authors.lastname: Nyström
authors.forename: Kenneth
authors.initials: K
authors.lastname: Holmqvist
authors.forename: Philippe
authors.initials: P
authors.lastname: Wagner
authors.forename: Daniel
authors.initials: D
authors.lastname: Förnvik
authors.forename: Anders
authors.initials: A
authors.lastname: Tingberg
authors.forename: Sophia
authors.initials: S
authors.lastname: Zackrisson
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005133:Eye Movements; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000706:statistics & numerical data*; D008327:Mammography / Q000706:statistics & numerical data*; D008875:Middle Aged; D011361:Professional Competence / Q000706:statistics & numerical data*; D013548:Sweden / Q000453:epidemiology; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D016526:Workload / Q000706:statistics & numerical data*