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Anatomy I > Intro to Medical Imaging > Flashcards

Intro to Medical Imaging Flashcards

1
Q

What are the different modalities of medical imaging?

A

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

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2
Q

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

A

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

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3
Q

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

A

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

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4
Q

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

A

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

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5
Q

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

A) Axial

B) Sagittal

C) Coronal

A

A) Axial

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6
Q

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

A) Axial

B) Sagittal

C) Coronal

A

C) Coronal

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7
Q

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

A) Axial

B) Sagittal

C) Coronal

A

B) Sagittal

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8
Q

What is the difference between Projection and Tomographic images?

A

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

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9
Q

Is this image a Projection image or a Tomographic Image?

A

Tomographic

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

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10
Q

What plane is this Tomographic image of?

A

Axial

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11
Q

What plane is this Tomographic image of?

A

Coronal

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12
Q

What plane is this Tomographic image of?

A

Sagittal

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13
Q

What forms of imaging utilizes Ionizing Radiation?

A

CT and X-Ray

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14
Q

What forms of imaging utilizes Soundwaves?

A

Ultrasound

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15
Q

What forms of imaging utilizes Magnetic Fields/Radiowaves?

A

Magnetic Resonance

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16
Q

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

A

Radiolucent Image

17
Q

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

A

Radiopaque Image

18
Q

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

A

Air

Soft Tissue

Fat

Bone

19
Q

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

A
  • Injection, ingestion, or other placement of opaque material within the body.
  • Improves visualization and tissue separation and it demonstrates functional anatomy and pathology
20
Q

What method of Contrast was used for this image?

A

Oral Barium

21
Q

What method of Contrast was used for this image?

A

Barium Enema/Rectal Barium

22
Q

What method of Contrast was used for this image?

A

Intraarterial Iodine

23
Q

What method of Contrast was used for this image?

A

Intravenous Iodine

24
Q

What provides contrast in an X-Ray Image?

A

Barium

25
Q

What provides contrast in a CT image?

A

Iodine

26
Q

What provides contrast in an MRI image?

A

Hydrogen Protons or mobile protons such as fat and water

27
Q

What produces contrast in ultrasound (US)?

A

Gas-filled microbubbles administered intravenously

28
Q

What imaging modality is appropriate to examine the chest?

A
  • X-ray
  • CT
  • Ultrasound only for the heart
  • MR
29
Q

What imaging modality is appropriate to examine the abdomen?

A
  • CT
  • Ultrasound
  • MR
30
Q

What imaging modality is appropriate to examine the head?

A
  • X-Ray for bone
  • MR
31
Q

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

A

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

32
Q

Identify if the image is T1W contrast or T2W contrast

A

T2W

33
Q

Identify if the image is T1W contrast or T2W contrast

A

T1W

34
Q

What is the purpose of intravascular contrast?

A
  • 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
35
Q

What is the purpose of oral contrast?

A

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

Anatomy I (3 decks)

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