**This tutorial provides 2 CEUs and is ideal for:**

. All 53.0 CEUs have been approved by CAMPEP for Medical Physics Continuing Education Credits.__Radiation Physicists__. The VOICE program of the Society of Nuclear Medicine and Molecular Imaging (SNMMI) has reviewed this program and approved it for a maximum of 53 continuing education hours. Because these tutorials have been approved by the VOICE Program, they are accepted for CE credit in all 50 states and by ARRT and NMTCB, even if you are not a VOICE/SNMMI member.__Nuclear Medicine and Radiology Technologists__. All 53.0 CME Credits have been approved by the IAC and are listed on the resources page of their website.__Physicians requiring CME Credits to maintain IAC Accreditation__

Proceed to the Tutorial: Attenuation of Radiation Tutorial

Proceed to the Quiz: Attenuation of Radiation Quiz

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**ATTENUATION OF RADIATION: 2 CEU **

This tutorial gives an overview on Attenuation of Radiation

**Objectives for Tutorial on Attenuation of Radiation
**

**Topics to be Covered**

- Definition of terms such as attenuation, half value layer, and 10th value layer
- Graphic representation of the attenuation of radiation as it traverses through matter
- Explanation of why parallel lines on a attenuation curve have the same half value layer
- Comparison of mono chromatic and polychromatic beams and the associated mathematics.
- Questions and mathematical problem solving related to attenuation of radiation
**After completion of this tutorial, one should be able to:**- Define attenuation of radiation, half-value layer, and tenth value layer.
- Explain what happens to intensity of a beam as one removes or adds HVLs or TVLs between source and detector
- Using graphical analysis, determine HVL or TVL from a semi-logarithmic plot of Intensity vs thickness.
- State mathematical relationship between m (the linear absorption coefficient) and the HVL and compare to the mathematical relationship between l (the decay constant) and the half-life
- Write the equations for calculations involving intensity changes as a function of the number of HVLs and TVLs
- Define monochromatic and polychromatic and explain why every HVL is equally thick for monochromatic beams, but not for polychromatic beams.
- Work a variety of math problems involving change of beam intensity with change of number of HVLs or TVLs.

**RECEIVING YOUR CE CREDIT:**

If you have taken one of the tutorials, received a score of 80% or above, and wish to receive CE credit: Make sure you submit all of the requested information when taking the test. It’s not necessary to send us the score sheets since we receive them electronically when you submit your answers for scoring.

Within 24 hours of receipt of your submitted score sheets and payment for the tutorial(s), we will do all of the following:

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If you have any problems with the self-reporting system, please contact the VOICE Coordinator directly at 703 708-9000. ).

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**TECHNOLOGISTS WISHING TO RECEIVE CE CREDIT:**

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