Test 4

Question 0

Gated imaging is

Answer 0

another technique for improving image quality in areas of the body in which involuntary patient motion is a problem such as breathing and heart beat

Question 1

Magnetic field strength is measured in

Answer 1

Tesla (T) or Gauss (G)

Question 2

In superconducting magnets, the wire loops are

Answer 2

cooled to a very low temperature with liquid helium to reduce amount of resistance in the wire

Question 3

To generage MR image, technologist selects a group of scanning parameters know as a

Answer 3

Pulse sequence

Question 4

One way to identify if a patient has had an MRI scan or a CT scan is to

Answer 4

ask was it very noisy

Question 5

The system used to convert mathematical data into images is called

Answer 5

Fourier Transform

Question 6

MRI is especially useful in the study of

Answer 6

spinal cord disease

Question 7

Objects containing magnetic metal may be attracted to the imaging magnet with

Answer 7

sufficient force to injure patients or personnel working with MRI

Question 8

Hydrogen is used for imaging in MRI because

Answer 8

it is the most common element in the body

Question 9

One advantage of MRI imaging over computed tomography (CT) is

Answer 9

no ionizing radiation is used for the test

Question 10

In MRI, the element that we scan for most frequently within the body is

Answer 10

Hydrogen

Question 11

The MRI signal is generated in the receiving antenna by

Answer 11

Faraday’s law of induction

Question 12

There are a variety of magnet types that can be used for MRI.

Answer 12

Yup

Question 13

Resistive and superconductive magnets are both electromagnets

Answer 13

Yup

Question 14

The most common type of magnet used in MRI imaging is

Answer 14

Superconducting

Question 15

There ARE contraindications for patients to receive an

Answer 15

MRI Scan

Question 16

Gating techniques are used to organize the signal so that

Answer 16

only the signal received during a specific part of the cardiac or respiratory cycle is used for image production

Question 17

Generally MRI is considered safe; however, there are some hazards, which would include

Answer 17

local burns from wires on a patient

Question 18

Gadolinium is a contrast agent used for MRI because it has paramagnetic properties. Compared with iodine contrast,

Answer 18

it is less toxic and has fewer side effects

Question 19

MRI has been useful for imaging many areas of the body, particularly

Answer 19

the brain, due to differentiation of gray matter from white matter

Question 20

The specialty using sound waves in the diagnosis of disease is

Answer 20

diagnostic medical sonography

Question 21

The term used to describe an ultrasound echo pattern that is similar throughout a structure or mass is

Answer 21

homogeneous

Question 22

MRI uses the motion of the atoms of the element it is looking at to

Answer 22

create the images we see

Question 23

Sometimes examinations in the abdominal cavity are difficult to perform due to

Answer 23

air or gas in the GI Tract

Question 24

The dampening material in a transducer

Answer 24

absorbs the unwanted waves and limits the number of pulses in the wave

Question 25

Some transducers are shaped for

Answer 25

organ systems they examine and each has a range of frequencies for the best possible image

Question 26

Ultrasound utilizes two planes,

Answer 26

longitudinal and transverse, when scanning a patient

Question 27

advantages of using Ultrasound over other imaging modalities is that

Answer 27

it is less expensive, it uses non-ionizing radiation, and it’s mobility

Question 28

The term acoustic impedance refers to

Answer 28

the amount of interference (acoustic pressure) in relation to the ultrasound beam

Question 29

Each transducer has built into it

Answer 29

markings that designate orientation

Question 30

The frequency for diagnostic ultrasound is in the range of

Answer 30

1 to 10 MHz

Question 31

The principle on which the ultrasound transducer operates is the

Answer 31

piezoelectric effect

Question 32

An acoustic wave refers to

Answer 32

the mechanical vibration that translates through a medium

Question 33

A sound wave requires particles to

Answer 33

interact with in order to travel. If particles are not present, such as in a vacuum, there will be no sound

Question 34

Diagnostic Ultrasound uses

Answer 34

nonionizing, high frequency sound waves to generate an image of a particular soft tissue structure in the body

Question 35

Sonography can be enhanced with Doppler measurements, which employ the

Answer 35

Doppler effect to assess whether structures (usually blood) are moving towards or away from the probe, and its relative velocity

Question 36

The Law of Conservation of Energy states that

Answer 36

energy can neither be created nor destroyed, only converted to another form of energy

Question 37

Sonography will most likely be involved in imaging

Answer 37

the pregnant abdomen

Question 38

Changing the frequency during ultrasound scanning will result in

Answer 38

images appearing darker or lighter

Question 39

Doppler ultrasound refers to

Answer 39

visualizing frequency change when turbulent flow is detected within a vascular structure

Question 40

An ultrasound of the breast may be performed to evaluate

Answer 40

a lump in the breast or a specific area of tenderness or pain and is also very useful in guiding the needle during a follow-up biopsy

Question 41

Ultrasound exams used to measure fetal age and to evaluate fetal anatomy are best done

Answer 41

16 - 24 weeks after conception

Question 42

The device that the technologist uses to send and receive the sound waves that create an

Answer 42

image is called a transducer

Question 43

The movement of a sound wave that travels forward is known as

Answer 43

compression

Question 44

Sonography is most often used for

Answer 44

soft tissue imaging

Question 45

one way to obtain a pediatrics cooperation is to

Answer 45

talk to the child at their eye level

Question 46

In communicating with the adolescent patient it is important to assess

Answer 46

their maturity level

Question 47

One of the greatest dangers facing a premature infant is

Answer 47

hypothermia

Question 48

Whenever possible a premature infant should be examined within

Answer 48

the isolette or infant warmer

Question 49

Pediatric patients with a myelomeningocele must be examined in the

Answer 49

prone position

Question 50

Omphalocele is a congenital anomaly that resembles

Answer 50

an enormous umbilical hernia

Question 51

The peak incidence of epiglottitis is

Answer 51

ages 3-6 years

Question 52

Epiglottiitis requires that

Answer 52

a physician accompany the patient during imaging procedures

Question 53

A characteristic of osteogenesis imperfecta is

Answer 53

increased susceptibility to fractures

Question 54

Suspected child abuse the radiographers first course of action is to

Answer 54

consult with a radiologist or other attending physician

Question 55

Classic indicators of physical abuse of a child include

Answer 55

posterior rib fractures, "bucket-handle" limb fractures, and corner fractures

Question 56

One of the most commonly used immobilizers for pediatric chest/abdomen X-ray is the

Answer 56

Pigg-O-Stat

Question 57

2 people are required or safely immobilize a pediatric patient using a

Answer 57

Pigg-O-Stat

Question 58

The most reliable method to detect inspiration for chest radiography on patients from birth to age 3 years is to

Answer 58

wait for the end of a cry

Question 59

"Bunny" wrap is immobilization recommended for

Answer 59

skull radiography of pediatric patients 3 years or younger

Question 60

Limb radiography of preschool age children is recommended

Answer 60

sitting on a parents lap

Question 61

Examination of the contra lateral limb is often required for

Answer 61

limb X-ray on a pediatric patient

Question 62

Salter-Harris fractures occur through the

Answer 62

epiphysis

Question 63

Hip exams on children are often ordered to assess for

Answer 63

Legg-Calve Perthes disease

Question 64

During hip and pelvic radiography female patients can be shielded

Answer 64

after the initial exam has ruled out sacral problems

Question 65

Left hand/wrist and left knees may be imaged for

Answer 65

bone age studies

Question 66

Octagonal infant immobilizers can be

Answer 66

more uncomfortable and appear more traumatic

Question 67

Routine protocol when imaging a pediatric patient for suspected aspirated foreign body is

Answer 67

PA chest on inspiration, PA chest on expiration and lateral chest

Question 68

An aspirated foreign body is more likely to lodge in the

Answer 68

right primary bronchus

Question 69

The primary hindrance for the use of MRI on pediatric patients is

Answer 69

the length and nature of the exam requires general anesthesia to avoid patient motion thus increasing the risk