title: Radiographic viewing conditions at Johannesburg Hospital.
abstract: OBJECTIVE
  To measure the luminance level of X-ray viewing boxes and ambient lighting levels in reporting rooms as a quality assurance procedure, and to compare the results with those recommended by the Directorate of Radiation Control, South Africa (DRC), European Commission (EC) and Nordic Radiation Protection Co-operation (NORDIC).
  
  
  METHODS
  All the viewing boxes housed at the Divisions of Radiation Oncology and Radiology of Johannesburg Hospital had their luminance levels measured using a calibrated photometer. In addition the room's ambient light was measured using a photometer.
  
  
  RESULTS
  The mean average luminance was 1026.75 ± 548.65 cd m(-2) and 3284.38 ± 327.91 cd m(-2) at the Division of Radiology and Division of Radiation Oncology respectively. The Division of Radiation Oncology had an average viewing box uniformity of 7.14% compared to 27.32% at the Division of Radiology. The average ambient lighting was found to be 66.30 lux and 66.43 lux at the Division of Radiation Oncology and Division of Radiology respectively.
  
  
  CONCLUSIONS
  The radiograph viewing conditions in Johannesburg variably comply with guidelines. This study underscores the need to implement quality control and quality assurance standards in radiographic image viewing.
authors: T
authors: T
authors: Nyathi
authors: An
authors: A
authors: Mwale
authors: P
authors: P
authors: Segone
authors: Sh
authors: Sh
authors: Mhlanga
authors: Ml
authors: M
authors: Pule
references: Invest Radiol. 1982 Jul-Aug;17(4):402-6
references: 7129822
references: Br J Radiol. 1990 Jul;63(751):564-7
references: 2390693
references: Br J Radiol. 2003 Feb;76(902):94-7
references: 12642276
references: Invest Radiol. 1982 Jul-Aug;17(4):394-401
references: 7129821
references: Br Dent J. 2000 Jul 8;189(1):40-2
references: 10967823
references: Oral Surg Oral Med Oral Pathol. 1983 Dec;56(6):651-4
references: 6581464