Lec 2 Main Features and Requirements of an X-Ray Tube

Question 1

Is the cathode (+) or (-)?

Answer 1

Negative (-)

Question 2

Is the anode (+) or (-)?

Answer 2

Positive (+)

Question 3

Consists of a heated filament of tungsten that provides the source of electrons.

Answer 3

Cathode

Question 4

Consists of a target (a small piece of tungsten) set into the angled face of a large copper block to allow efficient removal of heat.

Answer 4

Anode

Question 5

Aims the stream of electrons at the focal spot on the target.

Answer 5

Focusing device

Question 6

Connected between the cathode and anode; accelerates the electrons from the negative filament to the positive target.

Answer 6

High-voltage (kV)

Question 7

High-voltage (kV) is sometimes referred to as _______?

Answer 7

kVp or kilovoltage peak

Question 8

• Flows from the cathode to the anode.
• This is a measure of the quantity of electrons being accelerated.

Answer 8

Current (milliamperage)

Question 9

Absorbs unwanted X-rays as a radiation protection measure because X-rays are emitted in all directions

Answer 9

Surrounding lead casing

Question 10

Facilitates the removal of heat.

Answer 10

Surrounding oil