Deck 37: Tomography and Digital Tomosynthesis

Question 1

When explaining tomography to a patient, it would be advisable to

A)explain the process as slicing bread.
B)indicate that you will taking cuts of their kidneys.
C)explain to the patient that superimposed anatomical structures will viewed in sections.
D)explain that the process is similar to CT technology.

Answer 1

explain to the patient that superimposed anatomical structures will viewed in sections.

Question 2

The fulcrum

A)is the pivot point.
B)determines the focal plane.
C)controls the section level.
D)all of the above

Answer 2

all of the above

Question 3

The distance between fulcrum levels is the

A)tomographic angle.
B)exposure amplitude.
C)section interval.
D)section thickness.

Answer 3

section interval.

Question 4

During tomography, the object to be examined is placed at the

A)tomographic arc.
B)fulcrum.
C)exposure arc.
D)image receptor level.

Question 5

The exposure time during tomography must at least match the

A)fulcrum height.
B)section thickness.
C)length of time required for the x-ray tube to complete the tomographic amplitude.
D)interrogation time of the AEC.

Question 6

The object tomographed at the area located at the fulcrum is

A)minified.
B)blurred.
C)streaked.
D)sharp.

Question 7

Common mA stations found on dedicated tomographic machines may include all of the following EXCEPT

A)10
B)30
C)40
D)100

Question 8

Tomographic images are

A)inherently high contrast due to the thickness of the cut.
B)inherently low contrast.
C)primarily taken of the sagittal plane of the patient.
D)commonly taken of the head.

Question 9

The greater the distance from the fulcrum, the greater the

A)blurring.
B)patient dosage.
C)sharpness.
D)exposure amplitude.

Question 10

Tomography causes the blurring of nearly all recorded detail of objects outside the

A)area above the fulcrum.
B)area below the fulcrum.
C)focal plane.
D)amplitude.

Question 11

Which tomographic motion produces the thinnest section?

A)8 degrees
B)12 degrees
C)25 degrees
D)40 degrees

Question 12

As exposure amplitude increases,

A)section thickness increases.
B)tomographic amplitude decreases.
C)slice thickness decreases.
D)the exposure angle decreases.

Question 13

Terms used to refer to the tomographic image include

A)cut.
B)section.
C)slice.
D)all of the above

Question 14

The tomographic ____ is the total distance traveled by the tube.

A)arc
B)wavelength
C)blur
D)increment

Question 15

Nearly all contemporary tomography currently is

A)linear.
B)polytomography.
C)multidirectional.
D)stratotomography.

Question 16

Phantoms most commonly occur when the tube motion is ____ to the long axis of the structure.

A)parallel
B)perpendicular
C)tangential
D)all of the above

Question 17

How many exposures are required for an adequate image base during digital tomosynthesis?

A)10
B)20
C)30
D)40

Question 18

The greater the distance from the fulcrum, the ____ the blurring.

A)lesser
B)greater
C)thinner
D)thicker

Question 19

When the movement of the tube and the image receptor are along a straight line, the tomographic motion is classified as

A)linear.
B)circular.
C)elliptical.
D)trispiral.

Question 20

The major quality problem of linear tomography is changing

A)SID.
B)OID.
C)SOD.
D)all of the above

Question 21

Match the following selections with the statements that correlate.
thin tomographic slice thickness

A)zonogram
B)panoramic tomography
C)40 degrees
D)focal plane
E)exposure amplitude
F)10 degrees or more
G)section interval
H)maximum blur

Question 22

Match the following selections with the statements that correlate.
uses slit scan radiography

A)zonogram
B)panoramic tomography
C)40 degrees
D)focal plane
E)exposure amplitude
F)10 degrees or more
G)section interval
H)maximum blur

Question 23

Match the following selections with the statements that correlate.
farther from the image receptor

A)zonogram
B)panoramic tomography
C)40 degrees
D)focal plane
E)exposure amplitude
F)10 degrees or more
G)section interval
H)maximum blur

Question 24

The diagnostic modality of choice for an acoustic neuroma located in the inner ear is

A)wide angle tomography.
B)thin cut linear tomography.
C)CT scanning.
D)linear zonography.

Question 25

Match the following selections with the statements that correlate.
higher tomographic contrast with poor resolution

A)zonogram
B)panoramic tomography
C)40 degrees
D)focal plane
E)exposure amplitude
F)10 degrees or more
G)section interval
H)maximum blur

Question 26

Match the following selections with the statements that correlate.
can be less than tube travel distance

A)zonogram
B)panoramic tomography
C)40 degrees
D)focal plane
E)exposure amplitude
F)10 degrees or more
G)section interval
H)maximum blur

Question 27

Match the following selections with the statements that correlate.
should not exceed the section thickness

A)zonogram
B)panoramic tomography
C)40 degrees
D)focal plane
E)exposure amplitude
F)10 degrees or more
G)section interval
H)maximum blur

Question 28

Typically, tomographic sections of the kidneys during IVU consist of

A)zonograms.
B)thin slices.
C)elliptical tube motions to match the shape of the kidney.
D)sections in the transverse plane.

Question 29

All of the following are true of digital tomosynthesis EXCEPT:

A)Multiple views are taken of the anatomy.
B)Flat panel detectors are essential to this technology.
C)The images taken are dynamic and real-time.
D)The software to reconstruct the images is different from the algorithms of CT.

Question 30

Digital tomosynthesis is similar to CT imaging in that

A)both modalities use computers for the post-processing of images.
B)both modalities take multiple views of the anatomy.
C)both modalities require the x-ray tube and detector assembly to encircle the patient during acquisition.
D)both a and b

Question 31

Digital tomosynthesis has its greatest application currently with _________ studies.

A)chest
B)mammographic
C)renal
D)liver