Deck 16: Advanced Imaging Systems

Question 1

The energy source for CT scans is:

A)beta radiation.
B)radiofrequency.
C)ultrasound.
D)x-radiation.

Answer 1

x-radiation.

Question 2

What is the average absorbed dose from a CBCT scanner?

A)12.0 mSv (millisieverts)
B)15.0 mSv (millisieverts)
C)10.0 mSv (millisieverts)
D)13.0 mSv (millisieverts)

Answer 2

12.0 mSv (millisieverts)

Question 3

All of the following describe wavelengths used in MRI EXCEPT one.Which one is the EXCEPTION?

A)Long
B)Gamma radiation
C)Cannot cause ionization
D)Do not produce a radiation dose to the patient

Answer 3

Gamma radiation

Question 4

Computed Tomography eliminates the superimposition of images of structures superficial or deep to the area in question,but has an increased radiation dose when compared with conventional film.

A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Question 5

The cost to the patient for a CT scan is more expensive compared to a panoramic radiograph.

Question 6

CT images can be transmitted to specialists for consultation.

Question 7

Identify which technique uses organ-specific compounds that are injected into the patient,and are detected and imaged by a sensor called a gamma camera.

A)MRI
B)CBVT
C)CT Scan
D)Nuclear medicine

Question 8

MRI actually measures:

A)proton density.
B)neutron density.
C)electron density.
D)combination of electron,proton,and neutron density.

Question 9

Radionuclide scanning is useful for examining all of the following EXCEPT one.Which one is the EXCEPTION?,bone and salivary gland tissue,as well as for investigating metabolic bone disorders,infection,and bone fractures.

A)Bone fractures
B)Periodontal disease
C)Metabolic bone disorders
D)Bone and salivary gland tissue

Question 10

What does a CT number represent?

A)The light of a particular area that has been penetrated by the x-ray beam.
B)The beam of a particular area that has been penetrated by the x-ray beam.
C)The density of a particular area that has been penetrated by the x-ray beam.
D)The contrast of a particular area that has been penetrated by the x-ray beam.

Question 11

Cone beam computed tomography generate significantly less radiation than do traditional medical CT scanning devices,but deliver poorer diagnostic images.

A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Question 12

Water makes up approximately:

A)1% of human tissue.
B)10% of human tissue.
C)50% of human tissue.
D)70% of human tissue.

Question 13

The same sources of energy are used for CT scanning than for MRI.

Question 14

CBVT (CBCT)imaging may be utilized in dentistry for all of the following conditions EXCEPT:

A)oral pathologies.
B)implant treatment planning.
C)evaluation of impacted teeth.
D)evaluation of interproximal caries.

Question 15

The patient's maxillofacial area that is of interest when taking a CBCT image is known as the field of view (FOV).

A)Target
B)Focal-film distance
C)Field of view (FOV)
D)Object-film distance

Question 16

A CT scan taken in the axial plane can be reformatted to the sagittal and frontal planes.

Question 17

CT images for implant planning should have cross-sectional views.

Question 18

Identify the reason that the technician takes a scout film when taking images with CBCT?

A)To determine is the density is properly adjusted.
B)To determine if the contrast is properly adjusted.
C)To determine if the patient is properly positioned.
D)To determine is the exposure time is properly adjusted.