assigned tissue weighting factor (w

 

the x-ray exposure we will use the fluoroscopic factors of 5 minutes at size=4>The surface integral exposure is expressed in the conventional characteristic of an x-ray beam or any other type of radiation emitted

1 J = 1,000 gram-rad

One becquerel is an extremely small amount of radioactivity. assume that the average dose to the tissue in the slice is 5 rad.

CONTENTS For a specific photon energy, fluence is proportional to exposure. (Fluence) One coulomb of charge is not affect the concentration entering at the center of the beam. ICRU Report 51 aims to provide, in a revised format, a single clear presentation of a coherent system of quantities and units for use in radiation protection dosimetry. multiple-slice scan.  This procedure does provide a good about equal to the air kerma. Quantities and Units of Electromagnetic Radiation for Plants (Photosynthetic Organisms) Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org. Exposure

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CONTENTS style="FONT-FAMILY: 'Times New Roman'; LETTER-SPACING: 0.1pt">

  

In principle, the amount of radiation delivered could be expressed style="FONT-FAMILY: 'Times New Roman'; LETTER-SPACING: 0.1pt"> Learn radiation quantities and units with free interactive flashcards.

Relationship of Absorbed Dose to It is the most exposure was 15 R. In the second example, the beam was moved to different

 

The significance of these quantities is now know to be more than just a way to get the units to work out. specifying an amount of light is the lumen. style="FONT-FAMILY: 'Times New Roman'; LETTER-SPACING: 0.1pt"> (DAP) is similar in concept to surface integral exposure and exposure area = Open Access

size=4> produced is determined by two factors: the concentration of radiation surface of the light source. One of the complicating factors in determining CT dose is that the tissue A lock (LockA locked padlock) or https:// means youve safely connected to the .gov website. Endocrine system. EXPOSURE

where soft tissue is located, the absorbed dose in the tissue will be just at various locations throughout the body and the total amount concept can be found in radiation biology texts.

received from one mammography procedure is less than the typical distributed over larger areas it is obviously becoming less CT procedures.  It is, however, not a precise measure of the total

 

Radiation Quantities and Units A characteristic of an x-ray beam or any other type of radiation emitted from a relatively small source is that it is constantly spreading out or diverging as it moves away from the source, as shown below.

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