Three External Structures of the X-Ray Tube

Question 1

What are the Three External Structures of the X-Ray Tube?

Answer 1

i. Support Structure
ii. Protective Housing
iii. Glass Envelope

Question 2

What are six common types of support structures?

Answer 2

1. Ceiling Support
2. Floor-to-Ceiling Support
3. Floor Mount System
4. Fluoroscopy
5. Portable or Mobile Machine
6. C-Arm

Question 3

Consist of two rails mounted to the ceiling directly over the radiographic table.

Answer 3

Ceiling Support

Question 4

Most frequenly used support system

Answer 4

Ceiling Support

Question 5

Has a single column with rollers attached to each end, one on ceiling mounted rail and other end on the floor mounted rail.

Answer 5

Floor-to-Ceiling Support

Question 6

Alternative to column mount

Answer 6

Floor Mount System

Question 7

Mounted underneath the radiographic table and is energize only during fluoroscopy where the image tower is locked into place

Answer 7

Fluoroscopy

Question 8

Used in hospitals to perform radiography on patients who are in such critical condition that they cannot easily be transported to the radiology department (Non-ambulatory Patients)

Answer 8

Portable or Mobile Machine

Question 9

Preferably for Chest x-ray

Has Small kVp, thus it cannot be used for abdominal xrays

Answer 9

Portable or Mobile Machine

Question 10

Used as an x-ray for operating rooms

Heaviest x-ray machine

Answer 10

C-Arm

Question 11

Design to protect the radtech against accidental electric shock

Answer 11

PROTECTIVE HOUSING

Question 12

Material of Protective Housing

Answer 12

Lead or (Aluminum) Steel

Question 13

Also provide MECHANICAL SUPPORT for x-ray tube.

Answer 13

PROTECTIVE HOUSING

Question 14

Purpose of Oil around the X-Ray Tube

Answer 14

ELECTRICAL INSULATOR and THERMAL CUSHION

Question 15

X-rays that escape through the protective housing

Answer 15

LEAKAGE RADIATION

Question 16

They contribute nothing in a way of diagnostic information and result to unnecessary exposure to the patient and radiographer.

Answer 16

Leakage Radiation or Scattered Radiation

Question 17

STANDARD LEAKAGE RADIATION

Answer 17

100mR/hr at 1 meter or 1 mGy/hr
at 1 meter

Question 18

x-rays emitted through the window or port

Answer 18

Useful or Primary Beam

Question 19

When x-rays are produced, they are emitted ———?

Answer 19

emitted isotropically - equal intensity in all directions

Question 20

portion of the tube envelope which is thinner than the rest of the structure to allow X-ray output from the tube, minimising radiation absorption.

Answer 20

Window

Question 21

material of Glass or Metal Envelope

Answer 21

PYREX GLASS

Question 22

material that is able to withstand the tremendous heat

Answer 22

PYREX GLASS

Question 23

Allows for more effecient x-ray production and longer tube life.

Answer 23

GLASS OR METAL ENVELOPE