Preliminary Steps in Radiography Image Analysis Unit 1

The primary controlling factor of contrast in digital radiography is:

bit depth

The ability to visualize very small structures on a radiograph is termed:

recorded detail

Radiographs of the hands, wrist, feet, and toes are routinely displayed on the view box with the digits:

positioned toward the ceiling

The total destruction of microorganisms is accomplished through the use of:

sterilization

Involuntary motion can be caused by which of the following:

1.peristalsis

2.spasm

3.breathing

1 & 2

Voluntary motion resulting from lack of control can be caused by:

1.fear

2.age (children)

3.tremors

1 & 2

Radiographers can control voluntary motion by:

giving clear instruction to the patient

A decrease in technical factors may be required for a patient who has:

emphysema

An increase in technical factors may be required to penetrate a part on a patient that has:

pleural effusion

All radiographs must be identified with which of the following? 1) radiographer's name 2) patient's name or ID number 3) right or left marker

2 & 3

The metric conversion of 40 inches is:

102 cm

The source of radiation in an x-ray tube (the anode) shall not be closer than

12 inches from the patient

Collimation of the x-ray beam prompts which of the following:

1.An increase in radiographic contrast

2.reduction of scatter and secondary radiation

3.reduction in radiation exposure to the patient

All of the above

Federal guidelines require gonad shielding for which of the following:

1.when the gonads lie in the primary beam

2.if the clinical objective of the exam is not compromised

3.when the patient has reasonable reproductive potential

All of the above

T or F: Contrast is defined as the difference between densities on a radiograph?

true

Spatial resolution is defined as:

the ability to visualize very small structures

Distortion is defined as:

the bone being projected longer or shorter than it actually is

Voluntary motion is defined as:

the result of the lack of control caused by fear and age

What radiographic exams gives females the highest gonadal dose

lumbar spine

What radiographic exams gives males the highest gonadal dose

pelvis

Gonads should be shielded when they lie within _________cm of the primary x-ray field

5 cm

When imaging obese patients the following can be affected:

1.image quality

2.transfer ability

3.ability to find positioning landmarks

all of the above

Spatial resolution can be controlled by:

1.OID

2.IR size

3.focal spot size

4.SID

all of the above

Increasing collimation will:

1.reduce radiation exposure to the patient

2.reduce scatter and secondary radiation

3.increase recorded detail

all of the above

T or F: The radiographic table is cleaned after every patient

true

The following disease requires decrease in technical factors except:

1.emphysema

2.pneumothorax

3.atrophy

4.pleural effusion

pleural effusion

The following diseases require an increase in technical factors except:

1.edema

2.Emphysema

3.ascites

4.pleural effusion

emphysema

Who issues recommendation for contact with blood and bodily fluids?

CDC

Who requires the radiology department to write age-specific competencies to meet standards?

The joint commission

What are the roles of an RA or RPA (radiographers with advanced clinical practice)

1.Act as a radiologist extender

2.responsible for making initial image observations

3.perform selected radiologic procedures

all of the above