Radiology Pt.2

What is the size of the narrow anterior film

1

What is the main potential source of infection during dental x-rays?

Saliva and gingival fluid on the film

What are 3 essential things you can do to ensure patient protection?

1.Take X-ray only when needed

2. Only patient in the room

3.Use lead apron and thyroid collar

The central beam that comes from the x-ray tube head is referred to as?

Primary radiation

What x-ray is formed when the primary x-rays strike the patient?

Secondary Radiation

The radiation that is deflected from it's path as it strikes matter is?

Scatter Radiation

The form of radiation that escapes all directions from the tube head is

Leakage radiation

The standard film size for adult bite wings and periapicals

4

What is the target for electrons?

Anode

What are the most radio sensitive tissues in the dental region ?

Lense of the eye, thyroid gland, reproductive area

The effects of radiation is referred to as

Accumulative

The time between the exposure and the development of biological effects is?

Latent

A dosimeter badge should be worn?

Only while exposing radiographs

What determines the amount or quantity of radiation

Milliamperage

The molybdenum focusing cup is on which side of the x-ray tube?

Cathode side

The area on the tungsten target where the electrons hit is the?

Focal spot

Another name for the lead diaphragm is

collimator

A periapical radiogragh shows

Caries, Faulty restorations, & alveolar crest

An occlusal radiogragh shows

Entire arch of maxillary or mandible teeth

The difference between the shades of gray is referred to as

Contrast

The degree of darkness on an X-Ray is referred to as

Density

The cathode is the ____charged end of the x-ray tube.

Negative

The Anode is the ______end of the X-ray tube

Positive

The disk made of aluminum, located at the opening of the open ended cylinder:

Filter

Units below 70 kV use a _______ aluminum filter thickness

1.5mm

units above 70 kV use a _ aluminum filter thickness

2.5mm

The more the kvp increases, the ______ the wavelengths

shorter

The primary influence on an image is

KV's

Fractions of a second or ________ are needed to produce x-rays

Impulses

How many impulses are in 1/6th of second

10

Excess heat generated by the collision is dissipated by a heavy ________ _______ that takes the heat from the tungsten target and cools it in oil in the tube head