Deck 13: Screen-Film Radiographic Technique

Question 1

What are the four primary exposure factors?

A) kVp, mAs, filtration, and voltage ripple
B) mA, time, distance, and filtration
C) kVp, mAs, time, and SID
D) mA, time, kVp controls, and focal spot size

Answer 1

kVp, mAs, time, and SID

Question 2

Beam quantity is improved when the __________ is increased, but __________ has no effect on beam quantity.

A) kilovoltage, filtration
B) kilovoltage, milliamperage
C) milliamperage, kilovoltage
D) milliamperage, filtration

Answer 2

kilovoltage, milliamperage

Question 3

At least a _____% change in mAs is necessary to produce a visible change in optical density.

A) 10
B) 15
C) 30
D) 50

Answer 3

30

Question 4

A _____% increase in kVp has the same effect on optical density as doubling the mAs.

A) 5
B) 15
C) 30
D) 50

Question 5

A radiograph is taken using 75 kVp @ 20 mAs. Which change in technique would increase contrast but maintain the same density?

A) 85 kVp @ 10 mAs
B) 85 kVp @ 40 mAs
C) 65 kVp @ 20 mAs
D) 65 kVp @ 40 mAs

Question 6

An increase in mAs causes ______________ in beam quality and ___________ in beam quantity.

A) an increase, a decrease
B) an increase, no change
C) an increase, an increase
D) no change, an increase

Question 7

Beam penetrability is increased if ________ is/are increased.

A) mAs
B) SID
C) kVp
D) All of the above

Question 8

List the following tissues in order from the most radiolucent to the most radiopaque. I. muscle
II) fat
III) lung
IV) bone

A) IV, I, II, III
B) III, I, II, IV
C) III, II, I, IV
D) II, III, I, IV

Question 9

When only the optical density needs to be changed, only the _______ should be adjusted.

A) mAs
B) kVp
C) SID
D) filtration

Question 10

Patient thickness should be measured with the _______.

A) caliper
B) eyes
C) hands
D) SID tape

Question 11

Which medical condition may require a lower technique?

A) Atelectasis
B) Emphysema
C) Pneumonia
D) Pleural effusion

Question 12

There is a direct relationship between the quantity of x-rays and the _______________.

A) milliamperage
B) kilovolt peak
C) filter thickness
D) voltage ripple

Question 13

Changes in kVp affect _____________.

A) optical density
B) image contrast
C) image noise
D) All of the above

Question 14

If mAs is increased from 20 mAs to 40 mAs, the patient dose will _____________.

A) not be affected
B) increase slightly
C) be halved
D) be doubled

Question 15

The small focal spot will provide a _______. I. higher quality x-rays beam
II) greater quantity of x-rays
III) finer detail of image

A) I only
B) I and III
C) III only
D) I, II, and III

Question 16

Added filtration has the effect of __________ the beam quality and ________ patient dose.

A) reducing, increasing
B) reducing, reducing
C) increasing, reducing
D) increasing, increasing

Question 17

Both beam quality and beam quantity are increased by ______________.

A) increasing kVp
B) using 3-phase voltage
C) increasing mAs
D) Both A and B

Question 18

A radiograph with a long scale of contrast will have ________ latitude and ________ contrast.

A) narrow, low
B) narrow, high
C) wide, low
D) wide, high

Question 19

A radiograph taken using 65 kVp @ 10 mAs is too light. Which technique would double the optical density while producing a wider scale of contrast?

A) 75 kVp @ 10 mAs
B) 75 kVp @ 20 mAs
C) 55 kVp @ 20 mAs
D) 55 kVp @ 40 mAs

Question 20

Which technique would give the highest patient dose?

A) 90 kVp/200 mA @ 0.02 sec
B) 87 kVp/400 mA @ 0.02 sec
C) 74 kVp/400 mA @ 0.04 sec
D) 65 kVp/300 mA @ 0.1 sec

Question 21

With automatic exposure control the exposure is terminated when the optimum _____ is reached.

A) OD
B) time
C) mAs
D) kVp

Question 22

In a variable kVp technique chart, the optimal mAs is set for each body part and there is a _____ kVp increase for each cm of thickness.

A) 6
B) 4
C) 2
D) 1

Question 23

Foreshortening is caused by a(n) _________________________________.

A) angled beam when the body part is parallel the image receptor
B) angled body part when the beam is perpendicular to the image receptor
C) angled beam that is perpendicular to the body part
D) perpendicular beam and the body part parallel to the image receptor

Question 24

Sharpness of detail can be improved by increasing _________.

A) SID
B) OID
C) focal spot size
D) All of the above

Question 25

A variable mAs technique chart has a set kVp and specific mAs settings for ________________.

A) small, medium, and large parts
B) every 2 cm of thickness
C) every 6 cm of thickness
D) either A or B