Ch. 10 X-ray Imaging

33 Questions | By Rufio | Last updated: Mar 21, 2022 | Total Attempts: 1505

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Compton, photeletric integration, KeV, K-shell, incident photons

Questions and Answers

1.

List the five (4) basic x-ray interactions with matter: 3. through the photoelectric effect
2.

The higher the xray energy the __________________ the wavelength
- A.
  
  Longer
- B.
  
  Shorter
- C.
  
  Higher
- D.
  
  Bigger
3.

Low-energy x-rays (Thompson) tend to interact with the _____________
- A.
  
  Z#
- B.
  
  High-energy x-rays
- C.
  
  Photoelectrons
- D.
  
  Targer atom
4.

A change in the direction of the x-ray w/out a change in it's energy is called:
- A.
  
  Coherent scattering
- B.
  
  Photodisintegration
- C.
  
  Compton effect
5.

X-rays with 5 kev of energy are most likely to undergo _______________ scattering
- A.
  
  Coherent
- B.
  
  Compton
- C.
  
  Backscatter
- D.
  
  Electron
6.

What produces a uniform density of the radiograph called image noise?
- A.
  
  Image fog
- B.
  
  Filter
- C.
  
  Photidisintegration
- D.
  
  Coherent scattering
7.

____________ characterized by no energy transfer therefore no ionization
- A.
  
  Scattered x-ray
- B.
  
  Fluoroscopy
- C.
  
  Compton interaction
- D.
  
  Pair production
8.

Compton effect: most of the incident photon energy is retained by the___________________
- A.
  
  Photoelectron
- B.
  
  Scattered x-ray
- C.
  
  X-ray
- D.
  
  K-shell
9.

The formula Ei : E, + (Eu + Ers) represents the_______________
- A.
  
  Photoelectron
- B.
  
  Compton effect
- C.
  
  Thompson
- D.
  
  Pair production
10.

is responsible for the cassette-hinge sometimes seen on a radiographic image.
- A.
  
  Scattered x-ray
- B.
  
  Image fog
- C.
  
  Image noise
- D.
  
  Backscatter
11.

After a Compton interaction, the Compton secondary electron drops into a______________- in an electron shell previously created by some other ___________________ event
- A.
  
  Vacancy, ionizing
- B.
  
  Another shell, ionizing
- C.
  
  Outer shell, photoelectric
- D.
  
  L-shell, photoelectric
12.

The probability that an x-ray will undergo a photoelectricinteractionisapproximately__________times greater in bone than in soft tissue.
- A.
  
  10
- B.
  
  4
- C.
  
  7
- D.
  
  2
13.

The source of most of the occupational exposure to radiation comes from the_________ during ________________
- A.
  
  Diagnostic x-ray, an exam
- B.
  
  Light, x-ray
- C.
  
  Patient, an exam
- D.
  
  Patient, fluroscopy
14.

The two types of interaction that are of primary importance due to the levels of energy in diagnostic radiology are____________ and ________________
15.

The probability of a Compton interaction is _____________of the atomic number of the atom involved.
- A.
  
  Proportional
- B.
  
  Independent
- C.
  
  Inversely proportional
- D.
  
  Depending
16.

In a Compton interaction, at a deflection of zero (0) degrees from the incident photon,________________ energy is transferred.
- A.
  
  100%
- B.
  
  50%
- C.
  
  0
- D.
  
  35%
17.

An x-ray undergoes an ionizing interaction with an inner-shell electron and is totally absorbed best describes the --
- A.
  
  Photoelectric effect
- B.
  
  Compton effect
- C.
  
  Butterfly iffect
- D.
  
  Pair production
18.

During Compton scattering, photon interaction is more likely to occur with ________________ electrons
- A.
  
  Low energy
- B.
  
  Scattered
- C.
  
  High energy
19.

The formula Er.: Ki- Ku may be used to calculate the energy of the electron emitted during a _________________ interaction
20.

The type radiation emitted when an electron drops from an outer-shell to an inner-shell is _________________________
- A.
  
  Scattered
- B.
  
  K-shell
- C.
  
  Characteristic
- D.
  
  Photoelectric
21.

Dwingphotoelectric effect interactions, (electron transition) the vacancy in the last shell is filled by a
- A.
  
  L-shell
- B.
  
  Inner shell
- C.
  
  Outer shell
- D.
  
  Electron
22.

The probability of photoelectric interaction is _______________proportional to the_________ power of the atomic number of the absorbing material.
23.

Aphotoelectric interaction cannot occur unless the incident x-ray has energy equal to or greater than the _____________________________
- A.
  
  Outer shell
- B.
  
  K-shell
- C.
  
  Target atom
- D.
  
  Electron binding energy
24.

____________ scattering is most likely to reduce contrast in a diagnostic x-ray image
- A.
  
  Coherent
- B.
  
  Covalent
- C.
  
  Compton
- D.
  
  Characteristic
25.

The ____________________ effect results in the light areas on a radiograph (low optical density), such those corresponding to bone
- A.
  
  Photoelectric
- B.
  
  Image noise
- C.
  
  Compton