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  • 問題数 37 • 6/6/2024

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  • 1

    process whereby some of the x-ray beam is absorbed in the tissue and some passes through the anatomic part and is received by the image receptor.

    Differential Absorption

  • 2

    occurs because of Compton Scattering, Photoelectric Effect, and x-rays transmitted through the patient

    Differential Absorption

  • 3

    devices that receives the radiation leaving the patient to create an image

    Image Receptors

  • 4

    Three important types of x-rays to make a radiograph 1. scattered by ______ _______ 2. Absorbed _________ 3. transmitted through _____ without interaction

    1. scattered by Compton Interaction 2. Absorbed photoelectrically 3. transmitted through patient without interaction

  • 5

    If differential absorption is increased there will be: - ________ kVp - ________ image contrast - ________ patient dose

    - decreased kVp - increased image contrast - increased patient dose

  • 6

    provide information to the image receptor.

    Photoelectric Interactions

  • 7

    Contributes no useful information to the image results to image noise

    Compton Scattered X-rays

  • 8

    comes from the patient and is a cause of occupational radiation

    Scattered radiation

  • 9

    this produce the light areas in the radiograph

    Photoelectric Interactions

  • 10

    does not reach the image receptor as this interaction is absorbed by the body. Represents anatomy with high x-ray absorption characteristics are also called radiopaque (meaning they appear white in the image)

    Photoelectric Interactions

  • 11

    created by passing an x-ray beam through the patient and interacting with an image receptor such as an imaging plate in computed radiography.

    Radiographic image

  • 12

    The variations in absorption and transmission of the _____ _____ structurally REPRESENT the ANATOMIC AREA of interest.

    x-ray beam

  • 13

    3 ways to create a radiograph image by differential absorption

    - Beam Attenuation - Absorption - Transmission

  • 14

    occurs when the incoming x-ray photon has enough energy to remove an inner-shell electron

    Complete Absorption

  • 15

    An ejected electron which also quickly loses energy by interacting with nearby tissues

    Photoelectron

  • 16

    term used when the incoming x-ray photon passes through the anatomic part without any interaction with the anatomic structures

    Transmission

  • 17

    The combination of absorption and transmission creates an image that represents the ________ _______

    Anatomic parts

  • 18

    produces image fog and compromises the image if it strikes the image receptor.

    Scattered radiation

  • 19

    term used for when the attenuated x-ray beam leaves the patient's body also known as REMNNANT RADIATION and is COMPOSED OF both TRANSMITTED and SCATTERED RADIATION

    Exit Radiation

  • 20

    Increasing _______ ________ ________ increases beam attenuation by absorption of scattering

    Anatomic structure thickness

  • 21

    Increased _______ _______ ______ also increases x-ray beam attenuation

    Tissue anatomic number

  • 22

    more likely to occur in tissues with higher anatomic number

    X-ray absorption

  • 23

    Refers to the compactness of the anatomic particles comprising an anatomic part.

    Tissue Density

  • 24

    Increased ______ _______ also increases beam attenuation

    Tissue density

  • 25

    Increased _____ ______ ______ (energy) decreases beam attenuation

    X-ray Beam Quality

  • 26

    The _________ of an x-ray beam affects its interaction with anatomic tissue

    Penetrability

  • 27

    ______ _______ ______ more likely to be transmitted through anatomic tissue without interacting with the tissue's anatomic structures.

    Higher energy xrays

  • 28

    Results from Compton effect (incoming photons in the diagnostic range loses energy during interactions with the atoms comprising the tissue

    Scatter Radiation

  • 29

    Increasing the x-ray energy will result in the decrease of _______ ________ , but increase Compton scattering percentage

    Photon absorption

  • 30

    Reducers of Scatter Radiation on Image

    - Use of Beam Restriction - Use of Grid - Use of Air Gap Technique

  • 31

    what happens when tissue thickness is increased attenuation - absorption - transmission -

    attenuation - increase absorption - increase transmission - decrease

  • 32

    what happens when tissue anatomic number is increased attenuation - absorption - transmission -

    attenuation - increase absorption - increase transmission - decrease

  • 33

    what happens when tissue density is increased attenuation - absorption - transmission -

    attenuation - increase absorption - increase transmission - decrease

  • 34

    what happens when xray beam quality is increased attenuation - absorption - transmission -

    attenuation - decrease absorption - decrease transmission - increase

  • 35

    reduction in the energy or number of photons in the primary beam

    Attenuation

  • 36

    called as the x-ray beam passes through anatomic tissue, it loses some of its energy

    Beam Attenuation

  • 37

    called when some x-ray photons are absorbed as the energy of the primary beam is deposited within the atoms comprising the tissue

    Absorption