CH. 8 AQ

Which part of the radiographic image freely permits the passage of an x-ray beam?

#1

Which parts of the teeth and supporting structures are radiopaque? (Select the three that apply.)

-Bone -Dentin -Enamel

An increase in focal spot size increases the sharpness of the image. Distortion in the dental x-ray image can be decreased by focusing the x-ray beam parallel to the object and the receptor.

Both statements are false.

Radiographic images taken with film emulsions containing larger crystals are sharper, because the crystal size is directly proportional to the sharpness of the image.

Neither the statement nor the reason is correct.

The blurring of the edges of a radiographic image is referred to as

Penumbra

Each of the following is a factor that determines subject contrast except one. Which one is the exception?

Quality of sensor

What do the gray areas indicate in the radiographic image?

Soft tissue

Increasing milliamperage (mA) results in radiographic images with decreased density, because density is directly proportional to milliamperage (mA).

The statement is not correct, but the reason is correct.

The larger the focal spot the sharper the image, because the focal spot size is directly proportional to image sharpness.

The statement is not correct, but the reason is correct.

Which factor does NOT influence the sharpness of a dental x-ray image?

X-ray beam angulation