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Radiation Safety. Chapter 4. test 1 Questions nd Answers 2024
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Radiation Safety. Chapter 4. test 1
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Radiation Safety. Chapter 4. test 1As the harmful effects of radiation became known the medical community wanted to -
answer reduce these effects
To help reduce effects of radiation standards were developed for - answer measuring
and limiting radiation exposure
To control patient and personnel dose consistently diagnostic imaging professionals
must know - answer the quantities and units used as standards
X-rays discovered November 8, 1895 by - answer Wilhelm Conrad Roentgen
First image x-ray produced was of - answer roentgens wife's hand
In the months that followed Roentgen's findings some acute biologic damage started to
appear in - answer some investigators and human subjects
were reported in Europe as early as 1896 - answer Somatic damages
Review of Thomas Edison - answerClarence Madison Dally assistant to fluoroscope
inventor Thomas Edison became the first American radiation fatality
Died of radiation induced cancer in 1904 - as a result Edison stopped his x-ray research
Physician cancer deaths attributed to x-ray exposure reported as early as - answer1910
from occupational exposure
radiation exposure received in the course of exercising their professional responsibilities
- answerOccupational exposure
Many radiologist and dentist using these new rays experiences - answerskin reddening
or radio dermatitis - Many of these lesions became cancerous- Blood disorders such as
aplastic anemia and leukemia were also seen
The number of radiation injuries was alarming so the medical community decided to
look at methods to - answerreduce radiation exposure from all sources
what year was the British X-ray and Radium Protection Committee was formed -
answer1921
, the British X-ray and Radium Protection Committee was formed to do what -
answerPlanned to form guidelines on manufacture and use of radium and x-ray
equipment
Also devices to reduce the chance of occupational injury
Problem was there was not accurate measurement techniques or adequate background
knowledge of radiobiology
Could not agree on unit for radiation exposure
Unable to fulfill responsibility
the received quantity of radiation that causes diffuse redness over an area of skin after
irradiation - answerSkin erythema dose
Skin erythema dose was often inaccurate way to quantify radiation exposure because -
answerthe amount of radiation to produce this reaction varied person to person
Because the amount of radiation to produce this reaction varied person to person it was
often inaccurate way to quantify radiation exposure they continued to research for new
unit, which would be based on some - answerexactly assessable effect produced by
radiation such as ionization of atoms or energy absorbed in the irradiated object
First International Congress of Radiology in 1925 met including radiologist from all over
the world to collaborate. however, - answerno definite decisions were made about
quantifying effects of ionizing radiation
International Commission on Radiation Units and Measurements (ICRU) -
answerformed in 1925
second International Congress of Radiology was held - answer1928
congress also established the International X-ray and Radium Protection Commission
that would later turn into the current - answerInternational Commission on Radiological
Protection (ICRP
Congress charged the ICRU to define - answerthe unit of exposure
early tissue reactions could appear within - answerminutes, hours, days, or weeks and
were believed to be preventable if doses to workers were limited
radiation dose to which occupationally exposed persons could be continuously
subjected without any apparent harmful acute effects - answerTolerance dose
The general belief was that adverse effects would not be demonstrated at doses lower
than - answerthe tolerance level - Could be referred to as threshold dose
dose of radiation lower than which an individual has negligible chance of sustaining
specific biologic damage - answerthreshold dose
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