X-Ray and CT Scan

Question 1

What is an X-ray?

Answer 1

It creates images using x-rays, magnetic fields, sonar and radioactivity that allow doctor’s to make a diagnosis of a patient’s disease or injury.

Question 2

What is an ‘x-ray’?

Answer 2

a photon (bundle of energy) which is essentially without mass and has no charge.

Question 3

Is an x-ray a natural form of radiation?

Answer 3

No

Question 4

Is an x-ray invasive or non-invasive?

Answer 4

non-invasive

Question 5

How is an x-ray produced?

Answer 5

accelerating electrons toward a target.

Question 6

What does CT stand for?

Answer 6

Computed Tomography

Question 7

How does a CT work?

Answer 7

uses x-radiation to create higher resolution emages than a simple x-ray machine can produce alone.

Question 8

What is a wave?

Answer 8

a vibration tha tis propagated through a medium such as air.

Question 9

What is an electromagnetic wave?

Answer 9

is a vibration produced by the acceleration of an electric charnge.

Question 10

List the steps of an x-ray.

Answer 10

step 1: elecrons are exposed to a potential difference in an x-ray generators. Electrons gain NRG so becomes kinetic energy.
step 2: electrons move quickly. causes release of x-rays.
step 3: x-rays pass through body. Image recorded digitally. Called radiograph.

Question 11

What is an x-ray image called?

Answer 11

radiograph

Question 12

For X-ray:
Light sections =
Dark sectons -

Answer 12

light sectins = dense sections; few x-rays pass through

dark sections = lesser density; more x-rays pass through

Question 13

X-rays can show clear images of ____ but are ____ in their ability to see____.

Answer 13

• bone
• limited
• soft tissues

Question 14

In general, more dense_____will be seen by____areas.

Answer 14

• tissue

- darker

Question 15

For tissue:
dark spots =
light spots =

Answer 15

dark spots = dense

light spots = not dense

Question 16

For CT scan:
Do you have to have a contrast agent?
Do you have to fast?

Answer 16

• yes

- yes (12 hours)

Question 17

Is a CT scan invasive or non-invasive. What makes it such?

Answer 17

invasive because of the contrast agent

Question 18

How does a CT scan work? What does it produce?

Answer 18

• lie on narrow table that slides into the center of the scanner.
• scanner rotates around patient and produces one cross section upon a full rotation

Question 19

For CT scan:

You will be asked to hold your____and hold____.

Answer 19

• breath

- still

Question 20

For CT scan:

YOu will be asked to remove_____ and _____.

Answer 20

• street clothing

- jewlery

Question 21

For CT scan:

Can put multiple____together to create a ____image of the area being studied.

Answer 21

• tomographs

- 3D

Question 22

What are CT scans helpful in determing the presence of?

Answer 22

cancer

Question 23

What are CT scans highly sensitive to?

Answer 23

abnormalities in soft tissue

Question 24

CT scans can see even the tiniest of ______.

Answer 24

-bone fragments

Question 25

CT scans can help determine_____.

Answer 25

-bone mineral density

Question 26

Which is 3D and which is 2D?

x-ray and CT scan

Answer 26

3D=CT scan

2D=x-ray

Question 27

What does the patient do during an x-ray?

Answer 27

radiologic technologies positions the patient using alight source and a series of landmarks obrained by pressing various body parts to find reference points

Question 28

When do you have to hold your breath during an x-ray?

Answer 28

• if examing the chest or abdomin

- not required for legs, arms, or head

Question 29

For X-ray:

You may be asked to hold a_____position for a short period of time.

Answer 29

-akward

Question 30

For X-ray:

____and ____must be removed.

Answer 30

• street clothes

- jewlery

Question 31

X-rays are a type of _______?

Answer 31

-ionixing radiation

Question 32

What two risks come with ionizing radiation?

Answer 32

1) liverate an electron from an atom making it an ion

2) low doses can increase risk of long term effects such as cancer

Question 33

What does ALARA stand for?

Answer 33

As Low As Reasonably Achievable

Question 34

True or False:

X-rays are used to diagnose many types of medical issues not otherwise visible to the human eye.

Answer 34

True