title: Influence of CRT workstation on observer's performance.
abstract: The effects of the operability of the prototype CRT workstation and room illumination upon observer's performance were studied. In the experiment of reading CT images as a routine daily work at the CRT workstation, the average time required to analyse one CT image under a room illuminance of 100 lux was longer than that on the film viewbox. Prolongation occurred due mainly to the longer time required to retrieve and to arrange images as observers desired, and the limitation to the number of images simultaneously displayed on two CRT monitors. In the ROC studies to detect small pulmonary nodules on CRT images of computed radiography with imaging plate, illuminance around 170 lux showed the best result and a statistically significant difference (P less than 0.05) as compared with that of 480 lux. In addition to the radiologist's visual performance, room illumination must also be taken into consideration as it influences the observer's performance and diagnostic efficiency.
authors.affiliation: Department of Radiology, Nagoya University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Itoh
authors.forename: T
authors.initials: T
authors.lastname: Ishigaki
authors.forename: S
authors.initials: S
authors.lastname: Sakuma
authors.forename: M
authors.initials: M
authors.lastname: Hirose
authors.forename: H
authors.initials: H
authors.lastname: Fukatsu
authors.forename: S
authors.initials: S
authors.lastname: Itoh
authors.forename: Y
authors.initials: Y
authors.lastname: Horikawa
authors.forename: K
authors.initials: K
authors.lastname: Shimamoto
authors.forename: T
authors.initials: T
authors.lastname: Tadokoro
authors.forename: M
authors.initials: M
authors.lastname: Ikeda
mesh_terms: D003199:Computer Systems; D006804:Ergonomics; D008029:Lighting; D012372:ROC Curve; D011857:Radiographic Image Interpretation, Computer-Assisted; D011873:Radiology Information Systems / Q000592:standards*; D013647:Task Performance and Analysis; D014057:Tomography, X-Ray Computed