Tentamen Imaging Techniques and Radiology
Introduction class
1. In the figure on the right, a cross-‐section is
shown. What plane is indicated with the green
arrow?
A. Axial
B. Coronal
C. Sagital
D. None of the above
2. The first x-‐ray exposure of a hand in 1896 was about 150 mSv. What is the
typical dose of a similar exposure on a modern x-‐ray machine?
A. 1µSv
B. 0.1 mSv
C. 10 mSv
D. 100 mSv
3. What is roughly the rotation time of CT scanners today?
A. Shorter than 0.5 seconds
B. Between 0.5 and 1 second
C. Between 1 and 5 minutes
D. Longer than 5 minutes
4. In the figure on the right, two images are shown acquired with two different
imaging modalities. What image was acquired using which modality?
A. Left = CT, Right = conventional x-‐ray
B. Left = conventional x-‐ray Right = CT
C. Left = conventional x-‐ray
Right = x-‐ray angiography
D. Left = x-‐ray angiography
Right= conventional x-‐ray
, X-‐ray interaction and production
5. The linear energy transfer (LET) is defined at the amount of energy deposited
by a charged particle per unit path length in tissue. If the charge of the particle
is Q and the kinetic energy of the particle is E, which particle has the highest
LET?
A. Proton (Q=1) with E = 1 MeV
B. Proton (Q=1) with E = 100 keV
C. Electron (Q=1) with E = 1 MeV
D. Electron (Q=1) with E = 100 keV
6. In an x-‐ray tube, a large part of the x-‐ray spectrum consists of
Bremsstrahlung. The probability of Bremsstrahlung production is proportional to
Z2/m2. The bombardment of which particles on which anode material produces
the highest intensity of Bremsstrahlung?
A. Protons (Z=1, m=1) on tungsten (Z=74, m=183)
B. Protons (Z=1, m=1) on molybdenum (Z=42, m=96)
C. Electrons (Z=1, m=1) on tungsten (Z=74, m=183)
D. Electrons (Z=1, m=1) on molybdenum (Z=42, m=96)
7. In x-‐ray imaging at a tube voltage of 100kV, the following statement is true
for soft tissue: Why????????
A. Compton scattering is dominant and a coherent process
B. Compton scattering is dominant and a incoherent process
C. Photoelectric absorption is dominant and a coherent process
D. Photoelectric absorption is dominant and an incoherent process
8. Which statement is true?
A. Compton scattering is more important than Rayleigh scattering in soft tissue
B. Photoelectric absorption is more important than Compton scattering ins oft
tissue
Introduction class
1. In the figure on the right, a cross-‐section is
shown. What plane is indicated with the green
arrow?
A. Axial
B. Coronal
C. Sagital
D. None of the above
2. The first x-‐ray exposure of a hand in 1896 was about 150 mSv. What is the
typical dose of a similar exposure on a modern x-‐ray machine?
A. 1µSv
B. 0.1 mSv
C. 10 mSv
D. 100 mSv
3. What is roughly the rotation time of CT scanners today?
A. Shorter than 0.5 seconds
B. Between 0.5 and 1 second
C. Between 1 and 5 minutes
D. Longer than 5 minutes
4. In the figure on the right, two images are shown acquired with two different
imaging modalities. What image was acquired using which modality?
A. Left = CT, Right = conventional x-‐ray
B. Left = conventional x-‐ray Right = CT
C. Left = conventional x-‐ray
Right = x-‐ray angiography
D. Left = x-‐ray angiography
Right= conventional x-‐ray
, X-‐ray interaction and production
5. The linear energy transfer (LET) is defined at the amount of energy deposited
by a charged particle per unit path length in tissue. If the charge of the particle
is Q and the kinetic energy of the particle is E, which particle has the highest
LET?
A. Proton (Q=1) with E = 1 MeV
B. Proton (Q=1) with E = 100 keV
C. Electron (Q=1) with E = 1 MeV
D. Electron (Q=1) with E = 100 keV
6. In an x-‐ray tube, a large part of the x-‐ray spectrum consists of
Bremsstrahlung. The probability of Bremsstrahlung production is proportional to
Z2/m2. The bombardment of which particles on which anode material produces
the highest intensity of Bremsstrahlung?
A. Protons (Z=1, m=1) on tungsten (Z=74, m=183)
B. Protons (Z=1, m=1) on molybdenum (Z=42, m=96)
C. Electrons (Z=1, m=1) on tungsten (Z=74, m=183)
D. Electrons (Z=1, m=1) on molybdenum (Z=42, m=96)
7. In x-‐ray imaging at a tube voltage of 100kV, the following statement is true
for soft tissue: Why????????
A. Compton scattering is dominant and a coherent process
B. Compton scattering is dominant and a incoherent process
C. Photoelectric absorption is dominant and a coherent process
D. Photoelectric absorption is dominant and an incoherent process
8. Which statement is true?
A. Compton scattering is more important than Rayleigh scattering in soft tissue
B. Photoelectric absorption is more important than Compton scattering ins oft
tissue
