Random Points

Question 1

Vizualization parts of proximal femur

Answer 1

Femoral head, greater and lesser trochanters.

Question 2

Visualization parts of the proximal humerus?

Answer 2

Greater and lesser tubercle.

Question 3

What are the major bumps on the femur vs the humerus?

Answer 3

Femur is the trochanters, while the tubercles are on the humerus.

Question 4

What are the nubs on the side of the ankle?

Answer 4

Malleolus

Question 5

Nubs on the side of the elbow?

Answer 5

Epicondyles

Question 6

Nubs on the side of the knee?

Answer 6

Epicondyles

Question 7

kVp to size increase technique

Answer 7

2 kVp per centimeter. 2.54 cm per inch so five kVp per inch.

Question 8

No Grid Mutiplication Factor

Answer 8

1

Question 9

5:1 grid multiplication factor

Answer 9

2

Question 10

6:1 grid MF

Answer 10

3

Question 11

8:1 grid MF

Answer 11

4

Question 12

12:1 grid MF

Answer 12

5

Question 13

16:1 grid MF

Answer 13

6

Question 14

Direct Square Law if for what?

Answer 14

SID in relation to mAs used.

Question 15

If you increase the SID, should you increase mAs or kVp to compensate?

Answer 15

mAs using the inverse square law

Question 16

What is the formula to adjust mAs to kVp

Answer 16

Double mAs for 15% kVp decrease and vice versa.

Question 17

Why does screen speed reduce detail?

Answer 17

Faster means thicker and larger crystals, meaning they are faster to create light, a brighter light has more scatter of light, thus reducing the detail.

Question 18

High Contrast means what in relation to Grayscale and Window width.

Answer 18

Grayscale is short - fewer grays in the scale/list.

Window width is narrow. You have more extremes, but fewer overall shades to select from so the window is narrower.

Question 19

Low Conraste means what in relation to Grayscale and Window width.

Answer 19

Grayscal is long - many more grays in the scale/list.

Window width is wide. You have more shades of gray so the window widents to accomodate all the shades.

Question 20

How does high and low window levels impact the darkenss or brightness of the image.

Answer 20

High level darkens, low level lightens

High level moves the center of scale more towards the right so the dark grays on the other end become black.

Low lever moves the center toward the black so the super light grays near the white end become white.

Question 21

How many mrems in a rem

Answer 21

1000

Question 22

How many mSv in a rem?

Answer 22

10mSv

Question 23

5 mSv equals how many rem and mrem?

Answer 23

.5rem and 500mrem

Question 24

What is the umbra vs penumbra

Answer 24

Umbra is the shadow of the anatomy, so the entire white of a bone for example.

Penumbra is the amount of blur in the pixels that are the edge transition from the anatomy to outside the anatomy.

Question 26

Amorphus selenium is used where?

Answer 26

DR - Direct capture

Question 27

Amorphus Silicon is used where?

Answer 27

DR - Indirect Capture

Question 28

Cesium Iodide is used where?

Answer 28

DR - Indirect Capture

Question 29

Eropum Activate Barium Flourohalide

Answer 29

CR - The active layer

Question 30

Photomultiplier tube is part of what system

Answer 30

CR

Question 31

Cesium Iodide scintillation phosphor is part of what system?

Answer 31

DR

Question 32

Thin-film transistor is part of what system?

Answer 32

DR (direct and indirect) - a node in the active matrix, also called TFT

Question 33

Active matrix array is part of what system?

Answer 33

DR - the matrix of TFT

Question 34

x ray wavelength

Answer 34

0.1 and 0.5 angstroms