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Flashcards in Radiology Deck (24):
1

types of imaging modalities

FUXCMN
Fluoroscopy
Ultrasound
X-Ray
Computed Tomography
Magnetic Resonance Imagining
Nuclear Medicine Imagining
X-Ray Radiographs
Fluoroscopy
Computed Tomography
Magnetic Resonance Imagining
Ultrasound
Nuclear Medicine Imaging

2

FX-Ray

X-Ray tube from generator to detector
Hot cathode shoots electron beam at a plate of tungsten (in front of an extremely positively charged source or rotating anode) and x-rays are released and fly through collimator

3

denser the object, the more x-rays absorbed, and the fewer x-rays hit the detector, so....

denser objects are whiter

4

because in 2d, x-rays require...

multiple image views

5

Radiography has the highest ....

spatial resolution

6

Pros of radiography...

fast, easy, cheap, highest resolution

7

cons of radiography...

2D, poor soft tissue contract, ionizing radiation

8

2 ways ionization can harm/alter DNA

directly causing a mutation or creating free radicals that indirectly alter DNA

9

To avoid ionization radiation:

ALARA

10

Fluoroscopy is known as:

Dynamic x-raying

11

Fluoroscopy is ______ and is beneficial because___

less harmful, shows real time

12

Fluoroscopy requires the person to drink____

barium

13

double _____ enema

barium drink and air enema

14

digital subtraction angiography DSA

is a type of fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment.

15

Pros of Fluoroscopy:

cheap, dynamic imaging

16

Cons of Fluoroscopy:

poor resolution, poor soft tissue contrast, ionizing radiation

17

Computed Tomography PKA CAT scan

3D reconstruction from a series of cross-sectional images
radiograph images at incremental projection angles (64 slice CT)

18

radiograph images of Computed Tomography are _____ images

axial

19

Hounsfield unit is used in _____ and the units for water and air are_____

Computed Tomography, 0/-1000

20

CT contrast enhanced uses;

iodinated contrast; iohexol

21

Pros of computed tomogrphy:

fairly fast, 3D, separates tissues based on density

22

Cons of Computed Tomography

very high ionizing radiation, pathology that does not change density or enhances is difficult to see contrast reactions

23

Magnetic Resonance Imaging

made of water and fat: hydrogens, H+ has odd number of protons, spins in magnetic field, when field stops, it releases energy

24

what kind of energy is applied to mri protons??

radio waves, gives off radio waves also