Rad Flashcards
Digital images are a numeric representation of the x-ray intensities that are transmitted through the patient?
T
Digital imaging systems have a narrow dynamic range?
F
Digital processing involve the systematic application of highly complex mathematical formulas called?
Algorithms
The range or level of image contrast in the digital image is primarily controlled by?
Digital processing
Exposure latitude with the digital imaging is more wider or narrow when compared with analog imaging?
Wider
List the six image quality factors to you evaluate digital image
Brightness, distortion, contrast, exposure indicator, spatial resolution, noise,.
Individual Imogene the term what replaces density as applied in analog film based imaging?
Brightness
Changes in MAs do not have a primary controlling effect on digital image brightness?
True
Brightness cannot be altered in the digital image once it has been processed?
F
A digital imaging systems ability to distinguish between similar tissues is termed
Contrast resolution
Radiographic contrast in the digital image is primarily affected by
Application of processing algorithms
The greater the bit death of a digital imaging system the greater the
Contrast resolution
List the term describing the two pixel size is used in digital imaging
Acquisition pixel size and display pixel size
Which one of the two pixel sizes is most critical in maintaining high-resolution digital imaging
Acquisition pixel
Focal spot size has no impact on the resolution of the digital image
False
The current range of spatial resolution for digital radiographic imaging systems is between
2.5 LP/millimeters 5.0 lp/millimeters
In addition to acquisition pixel size spatial resolution in the digital image is controlled by?
Display matrix
The factors that affect image distortion for the digital image are different from those that affect filmscreen systems?
F
A numeric value that is representative of the exposure the digital image receptor receives is termed the?
Exposure indicator
List The four factors that affect the exposure indicator in the digital image?
MAs, KV, total detector area irradiated, objects exposed.
If the recommended exposure indicator range for I will expose images between 150 and 250, a value of 350 would indicate what?
Under exposure
If the recommended exposure indicator ranges between 2.0 and 2.4, then a value of 1.2 indicates?
Under exposure
Very find the exposure indicator for each exposure is essential in producing quality digital images with the?
Least possible dose to patient
A random disturbance that obscures or reduces clarity is the definition of?
Noise
SNR is the acronym for?
Signal to noise ratio
When insufficient MAs is applied in the production of a digital image it produces a what?
Low image
Another term for image noise is
Mottle
Changing or enhancing the electronic image to improve its diagnostic quality is called?
Post processing
Identify the top of postprocessing described by listing the correct term for the following definition. Adding text to images means?
Annotation
Increasing brightness along the margins of structures to increase the visibility of the edges?
Edge enhancement
Reversing the dark and light pixel values of an image is
Image Reversal
Enlarging all or part of an image is
Magnification
The application of specific image processing to reduce the display of noise in an image
Smoothing
Removing background anatomy to allow visualization of contrast media field structures?
Subjection
List the three components of a Photos stimulable storage phosphor plate system (PSP-CR)?
Image plates, IP reader, technologist or workstation.
A PSP based digital imaging system may be cassette based or cassette less?
True
The term describing the image being transmitted to digital archive for viewing in reading by the referring physician or radiologist is?
Image archiving
When using a PSP image plate, patient data can be linked to the image by use of AN?
Barcode reader
What’s the PSP image plate has had an image recorded on it, it must be discarded?
F
The Latent image on a PSP image plate is read by a lazer within the CR reader?
T
The greater the exposure to the plate, the greater the intensity of the light emitted from the plate during the reading process?
T
Any residue latent image is he erased on the PSP image plate by applying?
Bright light
The process of transferring the digital image to a storage device is what?
Archiving
Which one of the following technical factors does not apply to digital imaging?
A minimum of 72 inches is required for all projections
50% of the IP must be exposed to produce a correct reading of the image?
F
The use of grades is optional with PSP because the IP is not as sensitive to a scatter radiation as analog radiography
F
Which of the following Imogene component is not required with direct digital radiography?
IP and Image Reader
Patient those may be lower with if FPD- TFT as compared with analog radiography?
T
When using FPD-TFT for most non-grid procedures one reason the grid is generally not removed is it’s fragile construction?
F
FPD-TFT and PS P-based systems does not provide the ability to view a previous image to evaluate for positioning errors and confirm the exposure indicator?
F
In addition to FPD-TFT and PS PBase systems a third type of system is used to acquire radiographic images digitally which is?
CCD based systems
24 x 30 cm is?
10 x 12”
18 x 24 cm is?
8 x 10”
35 x 43 cm?
14 x 17”
30 x 35 cm?
11 x 14”
24 x 24 cm?
9 x 9”
18 x 43 cm?
7 x 17”
The size of the image receptor used is dependent primarily on the size of the body part examined?
T
Define the acronym PACS?
Picture archiving communication system
DICOM?
Digital imaging and communication in medicine
RIS?
Radiology info system
HIS?
Hospital info system
HL7?
Health level 7
The electronic transmission of diagnostic imaging studies is termed?
Teleradiography
What receptor is made with amorphis selenium or amorphis silicon?
FPD-TFT
Series of boxes that gives form to the image?
Display matrix
Range of exposure intensities that produce an acceptable image?
Exposure latitude
The user adjusting the window level and window width?
Windowing
Unsharp edges of the projected image?
Penumbra
Numeric value that is representative of the exposure the image receptor received in digital radiography?
Exposure indicator
Representative of the number of shades of gray that can be demonstrated by each pixel?
Bit depth
Misrepresentation of objects size or shape as projected onto radiographic recording media?
Distortion
Controls the energy of the x-ray beam?
KV
Random disturbance that obscures or reduces clarity?
Noise
The recorded sharpness of structures on the image?
Spatial resolution
Changing or enhancing the electronic image to view it from a different perspective or improve its diagnostic quality?
Post processing
RIS?
Radiology info system
IR?
Image receptor
OID?
Object image receptor distance
DR?
Digital radiography
AEC?
Automatic exposure control
HIS?
Hospital info system
Term used by certain equipment many factors to imply exposure indicators?
Exposure level
Range of exposure intensities that will produce an acceptable image?
Exposure latitude
Random disturbance that obscures or reduces slightly?
Noise
The point of least distortion of the projected image?
Central Ray
the user adjusting the window level and window width?
Windowing
Series of boxes that give form to the image?
Display matrix
Representative of the number of shades of gray that can be demonstrated by each pixel?
Bit-depth
Digital imaging requires the images be chemically processed?
F
