Digital Imaging

Question 1

Is a process of acquiring images of the body using X-Rays,displaying them digitally,and viewing and storing them on a computer and in computer files

Answer 1

Digital Imaging

Question 2

Stores the latent image of the body part until it is processed:

Answer 2

Photostimulable Phosphor (PSP)

Question 3

Are made of barium fluorhalide with europium:

Answer 3

IP Phosphors

Question 4

Is a two step process in which the X-Ray energy is first converted into light and then converted into an electric signal:

Answer 4

Indirect Conversion

Question 5

Is a type of indirect conversion detector:

Answer 5

The charged coupled device (CCD)

Question 6

Complementary Metal Oxide Semiconductor

Answer 6

CMOS

Question 7

Is a one-step process and convert the X-Ray energy directly to an electric signal through amorphous selenium detectors without the light conversion

Answer 7

Direct Conversion

Question 8

Is a series of thousands of very small boxes or squares

Answer 8

Actual Matrix

Question 9

Squares are known as picture elements or pixels:

Answer 9

Individual matrix squares

Question 10

Are defects in the components,which is a possibility in any imaging system:

Answer 10

Dead Pixels

Question 11

Is the amount of detail or sharpness of an image as seen on the monitor:

Answer 11

Spatial Resolution

Question 12

The larger the matrix and the smaller the pixels:

Answer 12

The greater the spatial resolution

Question 13

Is the ability to distinguish anatomical structures of similar subject contrast:

Answer 13

Contrast Resolution

Question 14

Is the response of the detector to different levels of radiation exposure:

Answer 14

Dynamic Range

Question 15

Describes the ability of the digital system to convert the X-Ray input into electric signal into a useful radiographic image

Answer 15

Signal-to-noise ratio (SNR)

Question 16

Refers to the useful information in the image:

Answer 16

Signal

Question 17

Refers to the amount of information that is not usefu:

Answer 17

Noise

Question 18

Modulation Transfer Function

Answer 18

MTF

Question 19

Used to measure the capacity or accuracy of the digital detector to pass its spatial resolution characteristics to the final image

Answer 19

MTF

Question 20

A graph of the minimum and maximum signals in the image

Answer 20

Histogram

Question 21

A file of stored images for each projection:

Answer 21

Look Up Table (LUT)

Question 22

Controls the density of the image:

Answer 22

Window Level

Question 23

Controls the contrast in the image:

Answer 23

Window Width

Question 24

Allows the limited operator to add text that is useful to have on the image:

Answer 24

Image Annotation

Question 25

Is a processing technique in which images can be made sharper and have greatly increased contrast

Answer 25

Edge Enhancement

Question 26

Digital Imaging and Communication in Medicine:

Answer 26

(DICOM)

Question 27

Is a universally accepted standard for exchanging medical radiographic images:

Answer 27

DICOM

Question 28

Electronic Medical Record

Answer 28

(EMR)

Question 29

Electronic Health Record

Answer 29

(EHR)

Question 30

Radiology Information System

Answer 30

(RIS)

Question 31

Picture Archival and Communication System

Answer 31

(PACS)