An exposure indicator in digital radiography systems


  • Thunyarat Chusin Department of Radiological Technology, Faculty of Allied Health Sciences, Naresuan University
  • Titipong Kaewlek Department of Radiological Technology, Faculty of Allied Health Sciences, Naresuan University


Exposure indicators, Digital radiography system, Computed radiography


Digital radiography (DR) system has become to replace screen-film system because it has a usefulness of workflow reduction and image quality improvement acquired by the system and users. Several DR manufacturers have developed an exposure indicator for users which can estimate an appropriate exposure technique for general radiography. However, the exposure indicators are obtained independently from various manufacturers with specified values that make a variety of its definitions and acquisitions. The definitions, acquisitions, factors affecting of exposure indicators, and suggestion guidelines for using exposure indicators in clinical are summarized in this article.


Download data is not yet available.


Shepard SJ, Wang J, Flynn M, et al. An exposure indicator for digital radiography: AAPM Task Group 116 (Executive Summary). Medical Physics 2009;36(7):2898-2914.

Gibson DJ, Davidson RA. Exposure creep in computed radiography: a longitudinal study. Acad Radiol 2012;19(4):458-462.

Mothiram U, Brennan PC, Lewis SJ, Moran B, Robinson J. Digital radiography exposure indices: A review. Journal of medical radiation sciences 2014;61(2):112-8.

Herrmann TL, Fauber TL, Gill J, et al. Best practices in digital radiography. Radiologic Technology 2012 ;84(1):83-9.

Andriole KP, Ruckdeschel TG, Flynn MJ, et al. ACR–AAPM–SIIM Practice Guideline for Digital Radiography. Journal of Digital Imaging 2013;1:1-2.

International Electrotechnical Commission. Medical electrical equipment – Exposure index of digital X-ray imaging systems- Part 1: Definitions and requirements for general radiography. IEC, Geneva, Switzerland, 2008 International standard 62494-1.

Seibert JA, Morin RL. The standardized exposure index for digital radiography: an opportunity for optimization of radiation dose to the pediatric population. Pediatric Radiology 2011;41(5):573-581.

Cohen MD, Cooper ML, Piersall K, Apgar BK. Quality assurance: using the exposure index and the deviation index to monitor radiation exposure for portable chest radiographs in neonates. Pediatr Radiol 2011;41(5):592-601.

Moore QT, Don S, Goske MJ, et al. Image gently: using exposure indicators to improve pediatric digital radiography. Radiologic Technology 2012;84(1):93-99.

Uffmann M, Schaefer-Prokop C. Digital radiography: The balance between image quality and required radiation dose. Eur J Radiol 2009; 72: 202–208

Baker MA. Investigation into factors influencing Fuji S-value using an extremity phantom. Journal of Medical Imaging and Radiation Sciences 2012;43(1):34-37.

Morrison G, John SD, Goske MJ, et al. Pediatric digital radiography education for radiologic technologists: Current state. Pediatr Radiol 2011; 41: 602–601

American Association of Physicists in Medicine. Acceptance Testing and Quality Control of Photostimulable Storage Phosphor Imaging Systems, AAPM Report No.93. Maryland: AAPM; 2006.



How to Cite

Chusin ธ, Kaewlek ฐ. An exposure indicator in digital radiography systems. Thai J Rad Tech [Internet]. 2018 Dec. 28 [cited 2022 Jul. 5];43(1):21-8. Available from:



Review articles

Most read articles by the same author(s)