Intro to Medical Imaging

Question 1

What are the different modalities of medical imaging?

Answer 1

X-Ray (Radiography) Fluoroscopy (guided procedures) X-Ray Computed Tomogra[hy (CT) Magnetic Resonance Imaging (MRI) Ultrasound (US)

Question 2

How is Transmission Imaging produced and what medical imaging modalities utilize it?

Answer 2

Traverses (travels across) the body, and exits the body to expose a detector. -X-Ray -Fluoroscopy -CT

Question 3

How is Transmission and Reflectance Imaging produced and what medical modalities utilize it?

Answer 3

Traverses the body, reflects off a tissue interface, and returns to the detector (transducer). -Ultrasound

Question 4

How is Emission Imaging produced and what medical modalities utilize it?

Answer 4

The scanning equipment detects particle energies emitted from a body source or detect magnetic energy stimulated in an area of the body. It looks for diseases or structures within the organs and tissues of the body. -MRI

Question 5

This CT scan displays an image of what plane of the body?

A) Axial

B) Sagittal

C) Coronal

Answer 5

A) Axial

Question 6

This CT scan displays an image of what plane of the body?

A) Axial

B) Sagittal

C) Coronal

Answer 6

C) Coronal

Question 7

This CT scan displays an image of what plane of the body?

A) Axial

B) Sagittal

C) Coronal

Answer 7

B) Sagittal

Question 8

What is the difference between Projection and Tomographic images?

Answer 8

Projection images are images of the whole structure versus Tomographic images will only be of sections

Question 9

Is this image a Projection image or a Tomographic Image?

Answer 9

Tomographic

It is only a snapshot of a section, not an entire structure

Question 10

What plane is this Tomographic image of?

Answer 10

Axial

Question 11

What plane is this Tomographic image of?

Answer 11

Coronal

Question 12

What plane is this Tomographic image of?

Answer 12

Sagittal

Question 13

What forms of imaging utilizes Ionizing Radiation?

Answer 13

CT and X-Ray

Question 14

What forms of imaging utilizes Soundwaves?

Answer 14

Ultrasound

Question 15

What forms of imaging utilizes Magnetic Fields/Radiowaves?

Answer 15

Magnetic Resonance

Question 16

As the radiodensity decreases you get a Radiolucent Image or a Radiopaque Image?

Answer 16

Radiolucent Image

Question 17

As the radiodensity increases, you get a Radiolucent Image or a Radiopaque Image?

Answer 17

Radiopaque Image

Question 18

What are the four basic densities of an X-Ray?

Answer 18

Air

Soft Tissue

Fat

Bone

Question 19

What are the methods in which Contrast Radiography is achieved and why is Contrast Radiography used?

Answer 19

• Injection, ingestion, or other placement of opaque material within the body.
• Improves visualization and tissue separation and it demonstrates functional anatomy and pathology

Question 20

What method of Contrast was used for this image?

Answer 20

Oral Barium

Question 21

What method of Contrast was used for this image?

Answer 21

Barium Enema/Rectal Barium

Question 22

What method of Contrast was used for this image?

Answer 22

Intraarterial Iodine

Question 23

What method of Contrast was used for this image?

Answer 23

Intravenous Iodine

Question 24

What provides contrast in an X-Ray Image?

Answer 24

Barium

Question 25

What provides contrast in a CT image?

Answer 25

Iodine

Question 26

What provides contrast in an MRI image?

Answer 26

Hydrogen Protons or mobile protons such as fat and water

Question 27

What produces contrast in ultrasound (US)?

Answer 27

Gas-filled microbubbles administered intravenously

Question 28

What imaging modality is appropriate to examine the **chest**?

Answer 28

- X-ray - CT - Ultrasound only for the heart - MR

Question 29

What imaging modality is appropriate to examine the **abdomen**?

Answer 29

- CT - Ultrasound - MR

Question 30

What imaging modality is appropriate to examine the **head**?

Answer 30

- X-Ray for bone - MR

Question 31

In the basic rule of contrast: T1-weighted (T1W) images: fat is \_\_\_\_\_\_, water is \_\_\_\_\_\_\_\_ T2-weighted (T2W) images: fat is \_\_\_\_\_\_, water is \_\_\_\_\_\_\_\_\_

Answer 31

T1-weighted (T1W) images: fat is **brightest**, water is **darkest** T2-weighted (T2W) images: fat is **darkest,** water is **brightest**

Question 32

Identify if the image is **T1W contrast** or **T2W contrast**

Answer 32

T2W

Question 33

Identify if the image is T1W contrast or T2W contrast

Answer 33

T1W

Question 34

What is the purpose of intravascular contrast?

Answer 34

- with contrast media (iodine) injected intravenously, it makes structures stand out from the background greyscale values - with barium injected intravenously, In the bloodstream, it will outline the vessel and demonstrate anatomy

Question 35

What is the purpose of oral contrast?

Answer 35

it will outline the structure identifying the wall, determine size and patency or obstruction