Question 1

Sodium iodide and bismuth germinate are newer scintillating materials that have reasonably high detection efficiency.

Accepted Answer

Lutetium oxyorthosilicate and gadolinium oxyorthosilicate are newer scintillating materials that have reasonably high detection efficiency and emit their light much more quickly.

Question 2

Which of the following only looks at the ratio of events acquired with and without the patient in place?

Accepted Answer

The measured attenuation correction looks only at the ratio of the events acquired with and without the patient in place.

Question 3

One approach to reducing scatter includes introducing __________ between detection rings.

Accepted Answer

Placing absorbing septa between detector rings will help reduce scatter.

Question 4

A transmission scan is first acquired without the patient in place, which is called a:

Accepted Answer

This first scan acquired without the patient in place is called a blank scan.

Question 5

The probability of detecting the photons from an annihilation event from one center of an object is less than that for an event on the periphery.

Accepted Answer

The probability of detecting the photons from an annihilation event from one center of an object is less than that for an event on the periphery.

Question 6

A modern positron emission tomography scanner might contain tens of thousands of small scintillating detectors.

Accepted Answer

A modern positron emission tomography scanner might contain tens of thousands of small scintillating detectors.

Question 7

¹⁸F-2- fluoro-2-deoxy-D-glucose (FDG) positron emission tomography has not been useful in the localization of epileptic seizures.

Accepted Answer

FDG positron emission tomography has been useful in the localization of epileptic seizures.

Question 8

The use of contrast media in computed tomography can lead to artifacts in the reconstructed positron emission tomography data.

Accepted Answer

The use of contrast media in computed tomography can lead to artifacts in the reconstructed positron emission tomography data.

Question 9

An atom that has too many protons or too many neutrons or they are configured in such a way so as to render the nucleus unstable, is said to be a(n):

Accepted Answer

In some instances, there may be too many protons or neutrons, or they may be configured in such a way as to make the nucleus unstable. Such atoms are said to be "radioactive."

Question 10

The ring diameter of most clinical positron emission tomography scanners is about:

Accepted Answer

The ring diameter in most positron emission tomography scanners is 1 meter.

Question 11

The crystals in the construction of a positron emission tomography scanner's detectors are:

Accepted Answer

Crystals in the positron emission tomography scanner's detectors are scintillation detectors.

Question 12

Another approach to attenuation correction in positron emission tomography is to use the data from a magnetic resonance imaging scan that are registered to the positron emission tomography data.

Accepted Answer

One approach to attenuation correction in positron emission tomography is to use the data from a computed tomography scan that are registered to the positron emission imaging data; that is, it is the same size and in the same orientation and sliced along the same planes as in the positron emission tomography scan.

Question 13

Radioactive fluorine can be chemically substituted for a: I. hydrogen atom
II. hydroxyl group
III. deoxyglucose

Accepted Answer

Radioactive fluorine can be chemically substituted for a hydrogen atom or a hydroxyl group but not for a deoxyglucose.

Question 14

All of the following are scintillating materials used in PET detectors except:

Accepted Answer

Calcium tungstate has not been used as a material for scintillating detectors.

Question 15

Positron emission tomography with ¹⁸F-2- fluoro-2-deoxy-D-glucose (FDG) is a useful tool in the initial diagnosis, staging, and follow-up of lung cancer.

Accepted Answer

Positron emission tomography with FDG is a useful tool in the initial diagnosis, staging, and follow-up of lung cancer.

Question 16

The availability of interplane septa allows for the acquisition of positron emission tomography data in two-dimensional mode, which substantially reduces the amount of interplane scatter.

Accepted Answer

The availability of interplane septa allows for the acquisition of positron emission tomography data in two-dimensional mode, which substantially reduces the amount of interplane scatter.

Question 17

If the nucleus contains too many protons, it may emit a: 
I. positive beta particle
II. positron
III. proton

Accepted Answer

If the nucleus contains too many protons, the nucleus may transform itself by emitting a positive beta particle, also known as a "positron," or by capturing an orbital electron.

Question 18

Which of the following can reduce noise in the final reconstructed positron emission tomography images? 
I. use of image segmentation
II. use of a single photon rather than a positron-emitting source
III. use a special noise filter

Accepted Answer

Use of image segmentation and a single photon rather than a positron emitting source can reduce noise.

Question 19

A positron has the same mass as an electron but has a positive rather than a negative charge.

Accepted Answer

A positron has the same mass as an electron but has a positive rather than a negative charge.

Question 20

In emission imaging an external, photon emitting source rotates about the patient to acquire a(n):

Accepted Answer

A transmission scan is obtained.

Quiz 16: Positron Emission Tomographycomputed Tomography Scanners

Sodium iodide and bismuth germinate are newer scintillating materials that have reasonably high detection efficiency.

Which of the following only looks at the ratio of events acquired with and without the patient in place?

One approach to reducing scatter includes introducing __________ between detection rings.

A transmission scan is first acquired without the patient in place, which is called a:

The probability of detecting the photons from an annihilation event from one center of an object is less than that for an event on the periphery.

A modern positron emission tomography scanner might contain tens of thousands of small scintillating detectors.

¹⁸F-2- fluoro-2-deoxy-D-glucose (FDG) positron emission tomography has not been useful in the localization of epileptic seizures.

The use of contrast media in computed tomography can lead to artifacts in the reconstructed positron emission tomography data.

An atom that has too many protons or too many neutrons or they are configured in such a way so as to render the nucleus unstable, is said to be a(n) :

The ring diameter of most clinical positron emission tomography scanners is about:

The crystals in the construction of a positron emission tomography scanner's detectors are:

Another approach to attenuation correction in positron emission tomography is to use the data from a magnetic resonance imaging scan that are registered to the positron emission tomography data.

Radioactive fluorine can be chemically substituted for a: I. hydrogen atom II. hydroxyl group III. deoxyglucose

All of the following are scintillating materials used in PET detectors except:

Positron emission tomography with ¹⁸F-2- fluoro-2-deoxy-D-glucose (FDG) is a useful tool in the initial diagnosis, staging, and follow-up of lung cancer.

The availability of interplane septa allows for the acquisition of positron emission tomography data in two-dimensional mode, which substantially reduces the amount of interplane scatter.

If the nucleus contains too many protons, it may emit a: I. positive beta particle II. positron III. proton

Which of the following can reduce noise in the final reconstructed positron emission tomography images? I. use of image segmentation II. use of a single photon rather than a positron-emitting source III. use a special noise filter

A positron has the same mass as an electron but has a positive rather than a negative charge.

In emission imaging an external, photon emitting source rotates about the patient to acquire a(n) :

Quiz 16: Positron Emission Tomographycomputed Tomography Scanners

Sodium iodide and bismuth germinate are newer scintillating materials that have reasonably high detection efficiency.

Which of the following only looks at the ratio of events acquired with and without the patient in place?

One approach to reducing scatter includes introducing __________ between detection rings.

A transmission scan is first acquired without the patient in place, which is called a:

The probability of detecting the photons from an annihilation event from one center of an object is less than that for an event on the periphery.

A modern positron emission tomography scanner might contain tens of thousands of small scintillating detectors.

18F-2- fluoro-2-deoxy-D-glucose (FDG) positron emission tomography has not been useful in the localization of epileptic seizures.

The use of contrast media in computed tomography can lead to artifacts in the reconstructed positron emission tomography data.

An atom that has too many protons or too many neutrons or they are configured in such a way so as to render the nucleus unstable, is said to be a(n) :

The ring diameter of most clinical positron emission tomography scanners is about:

The crystals in the construction of a positron emission tomography scanner's detectors are:

Another approach to attenuation correction in positron emission tomography is to use the data from a magnetic resonance imaging scan that are registered to the positron emission tomography data.

Radioactive fluorine can be chemically substituted for a: I. hydrogen atom II. hydroxyl group III. deoxyglucose

All of the following are scintillating materials used in PET detectors except:

Positron emission tomography with 18F-2- fluoro-2-deoxy-D-glucose (FDG) is a useful tool in the initial diagnosis, staging, and follow-up of lung cancer.

The availability of interplane septa allows for the acquisition of positron emission tomography data in two-dimensional mode, which substantially reduces the amount of interplane scatter.

If the nucleus contains too many protons, it may emit a: I. positive beta particle II. positron III. proton

Which of the following can reduce noise in the final reconstructed positron emission tomography images? I. use of image segmentation II. use of a single photon rather than a positron-emitting source III. use a special noise filter

A positron has the same mass as an electron but has a positive rather than a negative charge.

In emission imaging an external, photon emitting source rotates about the patient to acquire a(n) :

¹⁸F-2- fluoro-2-deoxy-D-glucose (FDG) positron emission tomography has not been useful in the localization of epileptic seizures.

Positron emission tomography with ¹⁸F-2- fluoro-2-deoxy-D-glucose (FDG) is a useful tool in the initial diagnosis, staging, and follow-up of lung cancer.