Films, Sensors and Development

Question 1

What are the two principle components of Film?

Answer 1

1-Emulsion (photo sensitive silver halide)

2-Base (plastic)

Question 2

What are three things sheet films or intensifying screens might be used for?

Answer 2

1-Panographic
2-TMJ
3-Cephalometric

Question 3

The dot on developed film serves as a guid and is raised toward what?

Answer 3

Source of radiation

Question 4

What are the 5 sizes of film?

Answer 4

1-Size 0-Pedo
2-Size 1-Adult anterior
3-Size 2-Adult posterior
4-Size 3-Long posterior
5-Size 4-occlusal

Question 5

The larger the crystals of silver halide the ______ the film speed

Answer 5

Faster

*C is slowest, F is fastest. Smaller crystals need longer exposure but have a crisper image

Question 6

What can be used to reduce scatter and fog on a radiograph?

Answer 6

A Grid

Question 7

What are the 5 steps for developing film?

Answer 7

1-Developer (convert silver halide to metallic silver grains)
2-Wash (30 sec, remove developer)
3-Fixer (remove undeveloped silver halide, harden and shrink emulsion)
4-Wash (remove fixer)
5-Dry

Question 8

Raising the temperature 10 degrees celsius has what affect on developing time?

Answer 8

doubles reaction rate, cutting development time in half

*quality may be compromised

Question 9

When was the first intramural x-ray sensor introduced?

Answer 9

1987

Question 10

Lower patient exposure, faster radiographs and being more ecofriendly are advantages to what type of radiograph?

Answer 10

Digital

Question 11

A sensor that connects directly to a computer and provides immediate images is called what?

Answer 11

Direct digital system

Question 12

A reusable phosphor plate that is scanned in to the computer after exposure is called what?

Answer 12

Indirect digital system

Question 13

What are three types of digital sensors?

Answer 13

1-Photostiumable storage phosphor plate (PSP)
2-Charge-coupled devices (CCD. early sensor)
3-Complentary Metal oxide semiconductor (CMOS)

Question 14

What form are medicinal communications stored as?

Answer 14

DICOM format

Question 15

The ability to distinguish different densities in an image is referred to as?

Answer 15

Contrast

Question 16

The ability to distinguish fine detail is called what?

Answer 16

Spatial resolution

Question 17

The ability to capture a range of exposures is called what?

Answer 17

Sensor latitude

*PSP has greater latitude than other sensors

Question 18

How does a digital sensor work?

Answer 18

X-ray photons are converted to visible light as they hit the Csl Scintillator. The light is then channeled via fiberoptic to the CCD