Bushong worksheets 21 &22
What two factors affect image magnification? - answerSID and OID
What is the magnification factor (MF)? – answer SID (image size) /SOD (object size)
When assessing image quality which of the following would be considered a subject
factor? - answerAtomic Number
Which of the following is most difficult to image because of low object contrast? -
answer Liver-spleen
Regarding image perception and interpretation what is the most important image
descriptor? - answerContrast resolution
When describing image quality all of the following apply except? - answerDigital device
display (DDD)
When the SOD cannot be estimated, the object size can using which expression? -
answerObject size= Image size (SOD/SID)
The term image sharpness is most closely related to the physics term... - answerSpatial
resolution
What is the largest source of radiographic noise? - answerCompton scatter radiation
Considering all the medical imaging modalities, which has best contrast resolution? -
answerMagnetic resonance imaging (MRI).
Which of the following medical imaging modalities is most frequently clinically
employed? - answerDigital radiography
When assessing image quality which of the following would be considered a geometric
factor? - answerImage blur
Use of which of the following is a good way to reduce quantum mottle? - answerHigh
mAs, low kVp
Which of the following is particularly important when considering contrast resolution? -
answerContrast scale, Noise scale
What principal characteristic of medical imaging determines spatial resolution? -
answerPixel size
, We associate a high contrast image with which of the following? - answerSlow image
receptor
When assessing image quality which of the following would be considered an image
receptor factor? - answerPixel size
Which of the following examinations can be performed without consideration of the heel
effect? - answerLateral skull
What is the principal advantage of using an image receptor having large pixel size? -
answerReduced patient radiation dose
What characteristics of radiographic quality is improved by using reduced x-ray
exposure time? - answerMotion Blur
Radiographic contrast is related to the product of what image characteristics? -
answerSubject contrast and image receptor contrast.
Which of the following imaging modalities comes closest to providing a three-
dimensional image? - answerDigital radiographic tomosynthesis (DRT)
What is the result on the image when an anatomic structure is not equally magnified? -
answerDistortion
The radiologic technologist (RT) can minimize bothersome magnification by using a
larger... - answerSource-to-image receptor distance (SID)
What is the principal advantage of digital radiographic image receptors with small pixel
size? - answerBetter spatial resolution
Which of the following radiographic techniques should be engaged for a posterior-
anterior (PA) chest examination? - answerCathode to abdomen side, high kVp, low mAs
Which of the following principally influences contrast resolution? -
answerPostprocessing
Subject contrast affects image contrast through each of the following except? -
answerpostprocessing
What is the approximate pixel size in digital radiography? - answer100 um
How can we best describe the effect of focal spot blur on an image? - answerRelatively
unimportant
Image distortion depends on all the following except... - answerFocal spot size
What two factors affect image magnification? - answerSID and OID
What is the magnification factor (MF)? – answer SID (image size) /SOD (object size)
When assessing image quality which of the following would be considered a subject
factor? - answerAtomic Number
Which of the following is most difficult to image because of low object contrast? -
answer Liver-spleen
Regarding image perception and interpretation what is the most important image
descriptor? - answerContrast resolution
When describing image quality all of the following apply except? - answerDigital device
display (DDD)
When the SOD cannot be estimated, the object size can using which expression? -
answerObject size= Image size (SOD/SID)
The term image sharpness is most closely related to the physics term... - answerSpatial
resolution
What is the largest source of radiographic noise? - answerCompton scatter radiation
Considering all the medical imaging modalities, which has best contrast resolution? -
answerMagnetic resonance imaging (MRI).
Which of the following medical imaging modalities is most frequently clinically
employed? - answerDigital radiography
When assessing image quality which of the following would be considered a geometric
factor? - answerImage blur
Use of which of the following is a good way to reduce quantum mottle? - answerHigh
mAs, low kVp
Which of the following is particularly important when considering contrast resolution? -
answerContrast scale, Noise scale
What principal characteristic of medical imaging determines spatial resolution? -
answerPixel size
, We associate a high contrast image with which of the following? - answerSlow image
receptor
When assessing image quality which of the following would be considered an image
receptor factor? - answerPixel size
Which of the following examinations can be performed without consideration of the heel
effect? - answerLateral skull
What is the principal advantage of using an image receptor having large pixel size? -
answerReduced patient radiation dose
What characteristics of radiographic quality is improved by using reduced x-ray
exposure time? - answerMotion Blur
Radiographic contrast is related to the product of what image characteristics? -
answerSubject contrast and image receptor contrast.
Which of the following imaging modalities comes closest to providing a three-
dimensional image? - answerDigital radiographic tomosynthesis (DRT)
What is the result on the image when an anatomic structure is not equally magnified? -
answerDistortion
The radiologic technologist (RT) can minimize bothersome magnification by using a
larger... - answerSource-to-image receptor distance (SID)
What is the principal advantage of digital radiographic image receptors with small pixel
size? - answerBetter spatial resolution
Which of the following radiographic techniques should be engaged for a posterior-
anterior (PA) chest examination? - answerCathode to abdomen side, high kVp, low mAs
Which of the following principally influences contrast resolution? -
answerPostprocessing
Subject contrast affects image contrast through each of the following except? -
answerpostprocessing
What is the approximate pixel size in digital radiography? - answer100 um
How can we best describe the effect of focal spot blur on an image? - answerRelatively
unimportant
Image distortion depends on all the following except... - answerFocal spot size
