RTBC- Image Production| Exam
Questions with Complete Answers
Which of the following is the outermost component of a computed radiography
(CR) cassette?
• Carbon fibers
• Rare-earth metals
• Photostimulable phosphor (PSP)
• Amorphous selenium (a-Se) - ANSWER Carbon fiber
The distance from the center of one pixel to the center of the adjacent pixel is called:
• Pitch
• Matrix size
• Bit depth
• Dynamic range - ANSWER Pitch
Spatial resolution is synonymous with which of the following terms?
Contrast
Brightness
Detail
Mottle - ANSWER Detail
The phosphor layer in a computed radiography (CR) imaging plate is composed of:
• Barium fluorohalide
,• Amorphous selenium (a-Se)
• Amorphous silicon (a-Si)
• Cesium iodide (Csl) - ANSWER Barium fluorohalide
Source-to-image distance (SID) refers to the distance from the:
• Collimator to the image receptor
• Target to the patient
• Collimator to the patient
• Focal spot target on the x-ray tube to the image receptor - ANSWER Focal spot
target on the x-ray tube to the image receptor
When a multi-focus image intensifier tube is operated in magnification mode:
• A larger area of input phosphor is used
• Patient dose will be lower
• Spatial resolution will be reduced
• Greater voltage is applied to the electrostatic lenses - ANSWER Greater voltage
is applied to the electrostatic lenses
Which of the following will determine the average pixel value?
• Region of interest (ROI)
• Value of interest (VOI)
• Window level (WL)
• Window width (WW) - ANSWER Region of interest (ROI)
Values of interest (VOl) are determined during:
• Histogram analysis
, • Grayscale analysis
• Analog data analysis
• Value analysis - ANSWER Histogram analysis
Elongation is a type of:
• Size distortion
• Shape distortion
• Geometric blur
• Quantum noise - ANSWER Shape distortion
Which of the following anode angles will result in the lowest x-ray beam intensity?
6 degrees
9 degrees
12 degrees
20 degrees - ANSWER 6°
In the context of a digital matrix, 1,024 × 1,024 refers to the:
• Number of pixels in the matrix
• Size of pixels in the matrix
• Number of brightness levels displayed in the matrix
• Physical measurement of the matrix - ANSWER Number of pixels in the matrix
Increasing the field-of-view will have what effect on the pixel size?
• No effect
• Increased pixel size
Questions with Complete Answers
Which of the following is the outermost component of a computed radiography
(CR) cassette?
• Carbon fibers
• Rare-earth metals
• Photostimulable phosphor (PSP)
• Amorphous selenium (a-Se) - ANSWER Carbon fiber
The distance from the center of one pixel to the center of the adjacent pixel is called:
• Pitch
• Matrix size
• Bit depth
• Dynamic range - ANSWER Pitch
Spatial resolution is synonymous with which of the following terms?
Contrast
Brightness
Detail
Mottle - ANSWER Detail
The phosphor layer in a computed radiography (CR) imaging plate is composed of:
• Barium fluorohalide
,• Amorphous selenium (a-Se)
• Amorphous silicon (a-Si)
• Cesium iodide (Csl) - ANSWER Barium fluorohalide
Source-to-image distance (SID) refers to the distance from the:
• Collimator to the image receptor
• Target to the patient
• Collimator to the patient
• Focal spot target on the x-ray tube to the image receptor - ANSWER Focal spot
target on the x-ray tube to the image receptor
When a multi-focus image intensifier tube is operated in magnification mode:
• A larger area of input phosphor is used
• Patient dose will be lower
• Spatial resolution will be reduced
• Greater voltage is applied to the electrostatic lenses - ANSWER Greater voltage
is applied to the electrostatic lenses
Which of the following will determine the average pixel value?
• Region of interest (ROI)
• Value of interest (VOI)
• Window level (WL)
• Window width (WW) - ANSWER Region of interest (ROI)
Values of interest (VOl) are determined during:
• Histogram analysis
, • Grayscale analysis
• Analog data analysis
• Value analysis - ANSWER Histogram analysis
Elongation is a type of:
• Size distortion
• Shape distortion
• Geometric blur
• Quantum noise - ANSWER Shape distortion
Which of the following anode angles will result in the lowest x-ray beam intensity?
6 degrees
9 degrees
12 degrees
20 degrees - ANSWER 6°
In the context of a digital matrix, 1,024 × 1,024 refers to the:
• Number of pixels in the matrix
• Size of pixels in the matrix
• Number of brightness levels displayed in the matrix
• Physical measurement of the matrix - ANSWER Number of pixels in the matrix
Increasing the field-of-view will have what effect on the pixel size?
• No effect
• Increased pixel size
