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Radiation Protection

QuestionAnswer
According to the National Council on Radiation Protection and Measurements (NCRP), the monthly limit for gestational dose-equivalent limit for embryo/fetus is 5 mSv p. 135
For a mobile radiographic unit the exposure switch should be a two-stage type? T/F False. has to be a dead man switch p 135
What is the most radio sensitive cell in the human body? lymphocytes p 136
The interaction between the ionizing radiation and the target molecule that is most likely to occur is the indirect effect p 136
irradiation of water molecules within the body and their resulting breakdown is termed radiolysis p 136
occupational radiation monitoring is required when is is possible that the individual might receive more than what dosage? one-tenth the annual dose limit p 126
What contributes most to the occupational exposure dose? Compton Scatter p 137
The xray interaction with matter that is responsible for the majority of scatter radiation reaching the IR is Compton Scatter p 137
a thermoluminescent dosimetry system would use which of the following crystals? Lithium fluoride p 137
All of the following radiation-exposure responses exhibit a nonlinear threshold dose-response except leukemia p 138
What is recommended for a pregnant radiographer in regards to dosimeters? wear a second dosimeter under a lead apron p 138
Medical and dental radiation accounts for what percentage of human-made radiation? 90% p 138
What is the minimum lead requirement for lead aprons according to NRCP? .5 mm Pb or equivalent p 139
Primary radiation barriers must be at least how high? 7 ft p 139
what is the term used to describe xray photon interaction with matter and the transference of part of the photon's energy to matter? scattering p 139
the annual dose limit for occupationally exposed individuals is valid for beta. x and gamma p 139
What unit of measure is used to express ionizing radiation dose to biologic material Rem (Sv) p 140
The largest amount of diagnostic xray absorption is most likely to occur in what tissues? Bone p 141
The reduction in the intensity of an xray beam as it passes through material is termed attenuation p 140
Primary radiation barriers usually require which thickness of shielding? 1/16" lead p 142
Diagnostic x-radiation may be correctly described as low energy, low LET p 142
Aluminum filtration has its greatest effect on low energy xray photons p 143
Which acute radiation syndrome requires the largest exposure before any effects become apparent? Central nervous system p 143
An increase in the total filtration of the xray beam will increase beam HVL p 147
the photoelectric effect is an interaction between an xray photon and an inner-shell electron p 146
Created by: jfwoodard