Week1 Lesson 1- Principles And Terminology

Question 1

What are the principles of radiographic?

Answer 1

aid diagnosis - radiation close
Plan treatments surgery - clinical reports, lead to other imaging

Question 2

what does phalanges mean

Answer 2

fingers, digits

Question 3

What are the 4 body habitual

Answer 3

Hypersthenic
•Wide, short thorax and broad peritoneal cavity with a high diaphragm – large adult

•Sthenic
•Less broad than hypersthenic – average adult, athletic build

•Hyposthenic
•Longer thorax with lower diaphragms – slim adult

•Asthenic
•Slim thorax with a low diaphragm – smaller and slimmer than average adult

Question 4

What is radiation

Answer 4

Energy
Electromagnetic spectrum of different types of radiation

Question 5

Describe what are X-rays

Answer 5

. High energy, short wave length,. Can penetrate matter- damage human cells

Question 6

What is the ALARP principle s how can this be done

Answer 6

As low as reasonably practicable

Get radiation dose correct , position of body right and the right body part correct the first time

Optimise radiation dose

Question 7

What is kVp

Answer 7

Is the amount of energy you have, you need more energy for larger parts

Affects contrast of the image

Question 8

What is mAs

Answer 8

Amount of X-rays photons
Affect density of the image

Question 9

What is contrast

Answer 9

The difference between components m an image

Question 10

What is contrast

Answer 10

The difference between components in an image

Kvp

Question 11

What is density

Answer 11

The amount of X-ray s , overall darkness of image,
MAs

Question 12

What is scatter

Answer 12

When X-ray irradiation hits s an object scatters in multiple direction which creates a washed out, pixilated ( called high noise image)

Question 13

What is attunatian

Answer 13

Is the energy lost due to interaction in its path

Metal and bones have high attrition as they stop x rats from going through

Low attenuation: air and lungs

Question 14

What is attunatian

Answer 14

Is the energy lost due to interaction in its path

Metal and bones have high attrition as they stop x rats from going through

Low attenuation: air and lungs

Question 15

What is SID

Answer 15

The distance from X-ray tubes to the imaging detector

Chest x-ray=180cm
Most is100-110

Question 16

How does source object distance effect image quality

Answer 16

Of there’s a small sod it creates an unsharp image

Means the closer the object to the source the more the unsharpness the image isq

Question 17

What is a grid a Bucky mechanism used for

Answer 17

Used for large body areas
Placed between and detector
Reduces scatter → improves image quality, however need higher dose of radiation

Question 18

What 1s the automatic exposure chamber

Answer 18

Located between patient and detector
It works out exposure for places that have different densities at a given KVp
The radiation cuts off when , a certain density has been given

Question 19

What is the light beam diaphragm

Answer 19

The middle G X-ray beam
Cross light

Question 20

What is Collimation

Answer 20

The size of feild you are irradiating
You want to limit this find to improve image quality and reduce scatter

Question 21

What are anatomical side markers

Answer 21

Lead

Indicate left or right side in images - image can be flipped

Radiographer identification - number or initial