VCU Radiology safety certification course 2025(Questions and answers) LATEST UPDATE
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Course
VCU Radiology safety certification course
Institution
VCU Radiology Safety Certification Course
radiosensitivity is determined by 4 factors - ️️metabolic state of the tissue, rate at
which radiation is delivered (protraction), amount of time between
exposures(fractionation), and size of the area expozed.
transmission - ️️photon passes completely through patient and strikes image
r...
VCU Radiology safety certification
course
radiosensitivity is determined by 4 factors - ✔️✔️metabolic state of the tissue, rate at
which radiation is delivered (protraction), amount of time between
exposures(fractionation), and size of the area expozed.
transmission - ✔️✔️photon passes completely through patient and strikes image
receptor, resulting in black(radiolucent) areas on image.
radiation - ✔️✔️a form of electromagnetic energy
production of radiation - ✔️✔️source of electrons, a way to accelerate the electrons, a
way to deaccelerate the electrons very quickly.
main parts of x ray tubes - ✔️✔️cathode, anode, pyrex glass tube
cathode - ✔️✔️source of electrons that are negatively charged and contain a filament
that is heated and spews off electrons
anode - ✔️✔️attracts the electrons at a great speed. the "accelerator"
pyrex glass tube - ✔️✔️surrounds the anode and cathode and maintains a vacuum
which prevents air from interfering with the traveling electrons
scatter - ✔️✔️x-ray hits patient but does not enter tissue. new photon of lower wave
length that travels in a different direction. source of fog on radiograph and source of
useless radiation to patient
absorption - ✔️✔️some/all of x-ray energy absorbed by tissue. removes photons from
beam, results in white areas on image - metallic restorations, cortical bone/enamel.
metabolic state of tissue - ✔️✔️faster cells are dividing in a tissue , the more
radiosensitive that tissue is( law of bergonie and tribondeau)
protraction - ✔️✔️rate at which radiation is delivered
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