Abstract
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A1. Optical density is:
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A. True. Optical density (OD) = log10 (I0/II) where I0 is the incident light intensity and I is the transmitted light intensity.
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B. True. Densitometer is a tool to measure OD. OD is often measured for film.
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C. True. The film is darker with higher OD value.
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D. True. Radiographic density is also known as OD.
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E. False. Optical density is 0 if 100% of light is transmitted, 100/100 = 1, log 1 = 0.
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Shuaib, I.L., Zin, H.M., Aziz, M.Z.A., Osman, N.D., Zainon, R. (2019). Examination Nine: Answers. In: FRCR Physics MCQs in Clinical Radiology. Springer, Singapore. https://doi.org/10.1007/978-981-13-0911-3_18
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DOI: https://doi.org/10.1007/978-981-13-0911-3_18
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