Deck 15: Additional Equipment

Question 1

During a DXA scan,the anatomy is scanned twice,each time with:

A) different amounts of mAs
B) different levels of kVp
C) different exposure times
D) different SIDs

Answer 1

different levels of kVp

Question 2

This type of dedicated unit is typically used to image the mandible and teeth.

A) chest
B) panorex
C) mammography
D) bone densitometry

Answer 2

panorex

Question 3

This type of radiographic unit is very lightweight and produces a consistent radiation output.

A) battery-powered mobile unit
B) capacitor discharge mobile unit
C) direct-power mobile unit
D) high-frequency mobile unit

Answer 3

high-frequency mobile unit

Question 4

This dedicated unit is used to determine if a patient has osteoporosis.

A) chest
B) panorex
C) mammography
D) bone densitometry

Question 5

When operating mobile C-arm fluoroscopic equipment,it is the _____________ responsibility to monitor and apply radiation safety measures.

A) physician's
B) radiographer's
C) radiologist's
D) none of the above

Question 6

DXA stands for:

A) double x-ray absorption
B) density x-ray attenuation
C) dual energy x-ray absorptiometry
D) double density x-ray attenuation

Question 7

When a panorex examination is being performed,the x-ray tube and image receptor move:

A) from side to side
B) around the patient
C) up and down
D) very little

Question 8

The most common areas scanned for bone densitometry are the:

A) hip and cervical spine
B) lumbar spine and skull
C) shoulder and thoracic spine
D) hip and lumbar spine

Question 9

There are generally _____ sets of locks on mobile C-arm fluoroscopic equipment.

A) 1
B) 2
C) 3
D) 6

Question 10

Unless otherwise required,during C-arm fluoroscopic procedures the image intensifier should be located:

A) beneath the patient
B) to the side of the patient
C) above the patient
D) none of the above

Question 11

Challenges when performing mobile radiographic imaging include:

A) having to use SIDs other than 40 inches or 72 inches
B) difficulty minimizing off-level grid cutoff
C) patient condition
D) all of the above

Question 12

Which of the following individuals do not need to be shielded during mobile radiographic procedures?

A) the patient
B) the nurse who must stay by the patient
C) the student radiographer
D) all should be shielded

Question 13

A common site for mobile fluoroscopy is:

A) in the patient's room
B) in the radiology department
C) in nursing home
D) in the operating room

Question 14

Which of the following radiographic units does not need to be plugged into the wall while producing x-rays?

A) battery-powered mobile unit
B) capacitor discharge mobile unit
C) direct-power mobile unit
D) high-frequency mobile unit

Question 15

Bone densitometry uses x-rays to determine the level of bone density because:

A) different density tissues absorb radiation differently
B) x-rays are very good at imaging the bony anatomy
C) A and B
D) none of the above

Question 16

The radiographer should stand at least _________ away from the patient and x-ray tube when making an exposure using mobile radiographic equipment.

A) 2 feet
B) 4 feet
C) 6 feet
D) 10 feet

Question 17

Breast imaging is done on this type of dedicated radiographic unit.

A) chest
B) panorex
C) mammography
D) bone densitometry

Question 18

Which of the following produces consistent radiation output,similar to a single-phase generator?

A) battery-powered mobile unit
B) capacitor discharge mobile unit
C) direct-power mobile unit
D) high-frequency mobile unit

Question 19

Unless otherwise required,during C-arm fluoroscopic procedures the x-ray tube should be located:

A) beneath the patient
B) to the side of the patient
C) above the patient
D) none of the above

Question 20

The dedicated unit designed to image the thorax in the upright position is the:

A) chest
B) panorex
C) mammography
D) bone densitometry

Question 21

The exposure amplitude is always _______________________ the tomographic amplitude.

A) the same as
B) shorter
C) longer
D) A or B

Question 22

The focal spot size of a dedicated mammography unit is _________ than that of a standard x-ray tube,measuring __________________.

A) smaller;0.1-0.3 mm
B) smaller;1-3 mm
C) larger;0.1-0.3 mm
D) larger;1-3 mm

Question 23

To produce the low kVp photons needed for mammography,the tube anode target is made of:

A) molybdenum
B) tungsten
C) rhodium
D) A and C

Question 24

During linear tomography,the tube and image receptor:

A) move in the same direction along a straight line
B) move in opposite directions along a straight line
C) move in the same direction along a circular path
D) move in opposite directions along a circular path

Question 25

To make the breast tissue a more uniform thickness,the dedicated mammography unit includes a _______________ device.

A) pancake
B) compression
C) flattening
D) magnification

Question 26

The T-score from the DXA data analysis indicates:

A) how large the patient is compared with young,healthy adults
B) how large the patient is compared with adults of the same age and gender
C) fracture risk resulting from osteoporosis compared with young,healthy adults
D) fracture risk resulting from osteoporosis compared with adults the same age and gender

Question 27

The horizontal level that extends through the body that includes the pivot point is the:

A) tomographic amplitude
B) exposure amplitude
C) fulcrum
D) focal plane

Question 28

The arc created by the total movement of the tube during tomography is the:

A) tomographic amplitude
B) exposure amplitude
C) fulcrum
D) focal plane

Question 29

As compared with a standard radiographic grid,the grid used for mammography has a __________ grid ratio and a ____________ grid frequency.

A) lower;lower
B) lower;higher
C) higher;lower
D) higher;higher

Question 30

The radiation dose to the breast ______________________ when magnification techniques are used.

A) is lower
B) is higher
C) remains the same

Question 31

Mammography uses a ___________ exposure.

A) low kVp
B) mid-range kVp
C) high kVp
D) low mAs

Question 32

The film-screen image receptor used in mammography has:

A) a double-emulsion film and two intensifying screens
B) a double-emulsion film and one intensifying screen
C) a single-emulsion film and one intensifying screen
D) a single-emulsion film and two intensifying screens

Question 33

The goal of linear tomography is to:

A) sharpen the anatomic structures above and below the level of interest
B) sharpen the anatomic structures within the level of interest
C) blur the anatomic structures above and below the level of interest
D) blur the anatomic structures within the level of interest

Question 34

In a system with an adjustable fulcrum,:

A) the patient does not move
B) the tube does not move during the exposure
C) the fulcrum layer is moved up or down to the level of interest
D) A and C

Question 35

Breast compression:

A) improves image contrast
B) improves spatial resolution
C) reduces magnification
D) all of the above

Question 36

DXA uses an x-ray tube and a(n):

A) scintillation detector
B) film-screen image receptor
C) image intensifier
D) none of the above

Question 37

The arc created when the x-ray beam is on during tomography is the:

A) tomographic amplitude
B) exposure amplitude
C) fulcrum
D) focal plane

Question 38

The fixed point that is placed at the level of the anatomic structures to be imaged during tomography is the:

A) tomographic amplitude
B) exposure amplitude
C) fulcrum
D) focal plane

Question 39

The kVp is very low because of the breast's:

A) size
B) low subject contrast
C) high subject contrast
D) none of the above

Question 40

The thickness,or width,of the focal plane is called a:

A) level
B) section
C) portion
D) none of the above

Question 41

As compared with standard radiography,patient exposure during tomographic procedures is:

A) lower
B) the same
C) higher
D) it depends on the anatomy being imaged

Question 42

In that the exposure time for a linear tomographic image is long,the mA must be:

A) low
B) mid-range
C) high
D) it depends on the mAs

Question 43

The image of a mandible taken with a panorex unit and one taken with standard radiographic equipment have very similar appearances.

Question 44

A dedicated unit is one that is designed for specific imaging procedures.

Question 45

Linear tomography is used to overcome the limitation that some anatomic areas are difficult to see because they are superimposed by other structures.

Question 46

The radiographer does not need to wear a lead apron while imaging patients using mobile equipment because the exposure is very minimal.

Question 47

Linear tomography is seldom used because the cost of making an x-ray unit have tomographic capabilities is prohibitive.

Question 48

The battery-powered mobile radiographic unit produces consistent radiation output,similar to a single-phase generator.

Question 49

During a linear tomographic study,the exposure time must be the same as the:

A) tomographic amplitude
B) section thickness
C) fulcrum level
D) exposure amplitude

Question 50

The mammography unit's x-ray tube window is made of molybdenum.

Question 51

The primary result of a DXA scan is a detailed radiograph of the hip or lumbar spine.

Question 52

AEC devices are always used for mobile radiographic imaging.

Question 53

A dedicated chest room allows the radiographer to stay in the room while the images are being processed.

Question 54

To produce a thin tomographic section,there needs to be a:

A) low fulcrum level
B) high fulcrum level
C) small tomographic angle
D) large tomographic angle