Nuclear Medicine Instrumentation Final UPDATED ACTUAL Questions and
CORRECT Answers
percent energy resolution?
When a Geiger counter is used to measure a radioactive
source and its cover is removed, what types of radiation
are being measured?
A. Neutrons
B. Beta and / or alpha particles
C. Beta/alpha particles and gamma rays
D. Bremsstrahlung radiation
Describe the basic operation of a gas-filled detector by
using the choices to complete the following:
A gas-filled detector takes the form of a 1. , with
an electric field in the gas space between two electrically
charged plates. Radiation interactions in the gas create
2. and 3. ; the former migrate to the 4.
and the latter toward the 5. . The change in charge
on one or both plates is correlated to the amount of
radiation present.
The purpose of the photomultiplier tube in a scintillation
detector is to:
A. count the radiation interactions.
B. cause the scintillation to occur.
C. provide the ground-state and excited-state orbitals at
the activation center.
D. convert the scintillation photons into an electronic sig-
nal.
According to the standard of practice, the percent energy
resolution should fall between 10%-20% for Cs137. True
or False
If the energy spread for Cs137 is 635 KEV to 689 KEV at the
half-maximum, does the instrument have an acceptable
, C. Beta/alpha particles and gamma rays
1. Capacitor, 2. electrons, 3. positive ions, 4. anode, 5.
Cathode
D. convert the scintillation photons into an electronic sig-
nal
False
CORRECT Answers
percent energy resolution?
When a Geiger counter is used to measure a radioactive
source and its cover is removed, what types of radiation
are being measured?
A. Neutrons
B. Beta and / or alpha particles
C. Beta/alpha particles and gamma rays
D. Bremsstrahlung radiation
Describe the basic operation of a gas-filled detector by
using the choices to complete the following:
A gas-filled detector takes the form of a 1. , with
an electric field in the gas space between two electrically
charged plates. Radiation interactions in the gas create
2. and 3. ; the former migrate to the 4.
and the latter toward the 5. . The change in charge
on one or both plates is correlated to the amount of
radiation present.
The purpose of the photomultiplier tube in a scintillation
detector is to:
A. count the radiation interactions.
B. cause the scintillation to occur.
C. provide the ground-state and excited-state orbitals at
the activation center.
D. convert the scintillation photons into an electronic sig-
nal.
According to the standard of practice, the percent energy
resolution should fall between 10%-20% for Cs137. True
or False
If the energy spread for Cs137 is 635 KEV to 689 KEV at the
half-maximum, does the instrument have an acceptable
, C. Beta/alpha particles and gamma rays
1. Capacitor, 2. electrons, 3. positive ions, 4. anode, 5.
Cathode
D. convert the scintillation photons into an electronic sig-
nal
False
