X-ray Machines

Question 1

What is the major limiting factor of output

Answer 1

Maximum mAs machine capable of producing

Question 2

Variation in output of machines (3)

Answer 2

Portable - limited; req. longer exposure
Mobile - output up to 300mA
Fixed - output up to 1250mA

Question 3

Small animal KV range

Answer 3

50-70

Question 4

Function of line voltage compensator

Answer 4

Compensates for fluctuations in mains supply which may cause inconsistent x-ray output

Question 5

What factors influence quantity of x-rays produced

Answer 5

Current and exposure time

Use of higher current reduces exposure time

Question 6

Exposure button requirement

Answer 6

Must be outside of controlled area

If on cable, must be at least 2m long

Question 7

Define prep stage

Answer 7

Filament heats

Anode rotates

Question 8

Define exposure stage

Answer 8

Voltage applied across tube

Question 9

Reasons for adjustment of voltage

Answer 9

Determines penetrative power of beam

Higher voltage for more dense structures

Question 10

Reasons for adjustment of current

Answer 10

Alters degrees of filament heating

Higher current for finer detail