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Exam 3 Flash Cards

Weeks 9 and 10

QuestionAnswer
A compensating filter is used to create ________ exposure with a body part of _________ thickness. uniform; nonuniform
X-ray beam energy is improved by ____________. increasing filtration
Increasing kVp increases the _________ of an x-ray beam. energy
X-ray intensity is directly proportional to _____. mAs
X-ray quantity is _______ proportional to the ________ of the distance from the source. inversely; square
When SID is increased, ______ must be increased by _____ to maintain constant exposure to the image receptor. mAs; SID to the square.
The main purpose of added filtration is to reduce ____________. patient dose
X-rays transmitted without interaction contribute to ___________________. the radiographic image
Compton interactions, photoelectric absorption, and transmitted x-rays all contribute to _________________. differential absorption
If 5% of an incident beam is transmitted through a body part, then 95% of that beam was ______________. attenuated
Photodisintegration is an interaction that takes place at which energy level? Energies higher than 10 MeV
The photoelectric effect is an interaction between an x-ray and a(n) _________ electron that results in total x-ray absorption. inner-shell
Pair production is an interaction between an x-ray and a(n) _________ that causes the x-ray to disappear and causes two electrons to take its place. nuclear electric field
Compton scattering is an interaction between an x-ray and a(n) _________ electron that results in ionization and loss of energy. outer-shell
High kVp techniques reduce ____________. patient dose
Coherent scattering is an interaction between _______ x-rays and atoms. low-energy
At energies below 40 keV, the predominant x-ray interaction in soft tissue and bone is ______________. photoelectric absorption
The scattered x-ray from a Compton interaction usually retains _____ of the energy of the incident photon. most
Created by: bmairet
 

 



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