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Examination Nine: Answers

  • Ibrahim Lutfi Shuaib
  • Hafiz M. Zin
  • Mohd Zahri Abdul Aziz
  • Noor Diyana Osman
  • Rafidah Zainon
Chapter

Abstract

  • A1. Optical density is:
    • A. True. Optical density (OD) = log10 (I0/II) where I0 is the incident light intensity and I is the transmitted light intensity.

    • B. True. Densitometer is a tool to measure OD. OD is often measured for film.

    • C. True. The film is darker with higher OD value.

    • D. True. Radiographic density is also known as OD.

    • E. False. Optical density is 0 if 100% of light is transmitted, 100/100 = 1, log 1 = 0.

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Ibrahim Lutfi Shuaib
    • 1
  • Hafiz M. Zin
    • 1
  • Mohd Zahri Abdul Aziz
    • 1
  • Noor Diyana Osman
    • 1
  • Rafidah Zainon
    • 1
  1. 1.Advanced Medical & Dental InstituteUniversiti Sains MalaysiaPenangMalaysia

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