introduction

Question 1

there are two main types of radiology

Answer 1

1. diagnostic radiology
2. interventional radiology

Question 2

types of imaging modalities

Answer 2

ionized
1. X-ray
2. fluoroscopy/angiography
3. CT
4. radionuclide imaging
nonionized
US & MRI

Question 3

types of contrast

Answer 3

natural
air, fat, bone
added
barium sulfate
gadolinium (IV)
idinated (water soluble)

Question 4

lingo of imaging modalites

Answer 4

X-ray
* radio opaque/dense
* radio lucent

CT
* density

MRI
* intensity

US
* echogenicity / echoic

Nuclic medicine
* high intake low intake

Question 5

Who:

1. Stated that “multiple 2D images can create a 3D image”?
2. Developed modern CT technology?

Answer 5

1. Johann Radon
2. Godfrey Hounsfeild

Question 6

when the Contrast is not used in CT

Answer 6

1. risk of anaphylaxis or allergy
2. poor renal function

Question 7

colors of doppler

Answer 7

red –> to the probe
blue –> away from the probe

Question 8

what is the meaning of

silhouette sign

Answer 8

loss of normal borders between structures (like the heart and lungs)

Question 9

What does ALARA mean

Answer 9

As low as reasonably achievable

Question 10

Factor affecting radiation exposure

Answer 10

Time, distance, shielding

and type of modality

Question 11

when we use AP or PA

Answer 11

AP
Whenever possible.
PA
emergency and very ill patient

PA used only if AP is not possible