Radiology module 10

Question 0

Patient exposure to x-rays is — to

— % lower with digital x-rays

Answer 0

50-90%

Question 1

Gray scale resolution is —- with digital film?

It has —– shades of gray compared to normal films —- shades of gray?

Answer 1

Higher
256
16-25

Question 2

Resolution on digital film is

—-lp/mm compared to —- lp/mm on conventional film

Answer 2

10

12-20

Question 3

The two types of digital imaging are?

Answer 3

Direct

Indirect

Question 4

Direct digital is wired to a computer with either a — or—-

Answer 4

CCD charged coupling device

CMOS complementary metal-oxide semiconductor

Question 5

The Two types of indirect digital systems are?

Answer 5

Scanning radiographs

Storage phosphor plate

Question 6

The indirect digital phosphor system uses a — and —- to get images onto a computer

Answer 6

PPP or PSP
(photo-stimulable phosphor plate)
Laser beam scanner

Question 7

Indirect digital (scanning) is —- to direct digital because?

Answer 7

Inferior

It is a “copy” of an original image

Question 8

Indirect phosphor offers – size of film

Answer 8

Different

Question 9

What are the 5 basic elements needed to take a digital x-ray?

Answer 9

X-ray machine
Sensor or detector
Analogue to digital converter
Computer
Monitor

Question 10

Digital sensors are — sensitive to x-rays than conventional film?
(Do you need more/less radiation?)

Answer 10

More

Less

Question 11

An —- image is captured by the digital sensor and then converted into —- that can be stored on the computer

Answer 11

Analog

Electronic pieces of data (digital)

Question 12

Traditional film has — — in the emulsion that produce the image.
Digital sensors have —-

Answer 12

Halide crystals

Pixels

Question 13

The silver halide crystals are arranged in what manner on the emulsion?

Answer 13

Randomly

Question 14

In digital sensors the pixels are arranged how?

Answer 14

Each has a specific spot

Question 15

Each pixel has a — — representing the — penetration of the object!

Answer 15

Gray level

Photon

Question 16

Your eyes can only see — out of the 256 shades of gray on digital images

Answer 16

32

Question 17

Digital imaging requires — impulses vs — impulses for a normal film

Answer 17

3

12

Question 18

Most people feel like digital images do not equal film in regards to — and —

Answer 18

Sharpness

Detail

Question 19

Exposure time for digital is approx. — of conventional film
Ie — impulses

Answer 19

1/2

3 (3/60 or .05 second)

Question 20

A pixel is a — —

Answer 20

Picture element

A specific spot on the sensor

Question 21

When an x-ray photon hits the pixel it is —- —.

Answer 21

Electronically charged

Question 22

When the pixel is electronically charged it is done in proportion to what?

Answer 22

The number of electrons that react with that particular pixel
(electron potential well)

Question 23

Major digital image software manufacturers have a built in — — to signal when an image has been altered

Answer 23

Audit indicator

Question 24

Digital imaging will soon replace traditional films due to its —, —-,
—–, and —–

Answer 24

Speed
Enhancement capabilities
Electronic format
Benefits to patient and communication