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Part 3. Cardinal Principles of Radiation Protection
Protection and Safety from Energies Used In: X-ray, CT, Nuclear Medicine and PET, and MRI Part III Cardinal Principles of Radiation Protection
Author: Nicholas Joseph Jr. R.T. (R), written on Saturday September 11th 2004 - 4:11 PM Credits: 3
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List and discuss the three Cardinal Principles of radiation protection.
State how the primary fluoroscopist can limit exposure time to patients and others during dynamic imaging procedures.
Discuss FDA regulations for fluoroscopy equipment that help the technologist in regulating the cumulative time of radiation exposure.
Discuss why distance is the best method of limiting radiation exposure.
State the inverse square law and discuss its meaning.
State what types of ionizing radiation the inverse square law applies to and which types do not follow the inverse square law.
Discuss why scatter radiation is an occupational risk for radiographers.
Discuss why 90 degree scatter is particularly harmful to a radiographer positioned at the head end of the radiographic table vs. being behind the console.
State at least three rules for remaining at a safe distance using distance as a means of radiation safety and protection for personnel.
Discuss the reason for using the shielding formula to shield radiographic imaging rooms and the application of the linear attenuation coefficient.
Differentiate between a primary and a second barrier, stating how shields such as lead aprons, lead gloves, and mobile barriers are classified.
Define the terms HVL and TVL and solve radiation intensity problems.
Discuss the use and shielding requirements of the bucky slot cover and the protective lead that hangs from the image intensifier.
Be able to solve intensity problems using the inverse square law.
Be able to explain the concepts of linear attenuation coefficient applied to shielding.
Given the linear attenuation coefficient be able to solve a problem involving the relative quantity of photons absorbed by the absorber.
Clearly list and state the Pb equivalence required by NCRP for various types of protective apparel commonly used in radiology.
State the location of the fluoroscopic tube and relative tube current these tubes output.
State why technologist often accumulate greater radiation exposure during fluoroscopic procedures than during single exposure radiographic imaging.
State the NCRP and NCR requirements for posting of the universal radiation symbol in radiology departments.
Differentiate between a radiation area and a high radiation area.
State the purpose for having a light source indicator of an energized x-ray tube on the outside of the x-ray room door.
Discuss the mandate of ALARA as a means of radiation protection.
