RADT 241 TEST REVIEW EXAM
QUESTIONS AND ANSWERS
the maximum exposure received by the patient is at the - Answer-(ESE) entrance skin
exposure
the radiation intensity from a diagnostic x-ray unit will vary in a direct relationship with? -
Answer--mAs
-kvp^2
*inverse relationship w/ the square of the distance
which anatomical part will deliver the lowest (ESE)? - Answer--hip *lot of tissue
-pelvis
-l-spine
-elbow
answer: ELBOW *smallest technical factors
a radiographer can reduce pt dose by at least how much % in most examinations by
choosing correct exposure factors? - Answer-50%
to reduce pt exposure the ***** consistent with the image quality should be selected? -
Answer--highest mAs
-shortest distance
-highest kVp
answer: highest kVp
pt ESE decreases as SID increases? - Answer-TRUE
*distance -they have a inverse relationship
when the primary beam field size decreases what happens to pt exposure? - Answer-
decreases
the 3 types of gonad shields? - Answer-1. shape contact
2. flat contact
3. shadow contact
when using a radiographic grid will it decrease or increase pt exposure? - Answer-
increase *have to shoot more mAs when using grids for quality
entrance skin exposure (ESE) is considered what type of exposure? - Answer-
MAXIMUM
, why Is skull radiography PA projection preferred over AP? - Answer--less exposure to
eyes
when pt SID or SOD increases pt (ESE) does what? - Answer-decreases
*inversely proportional
when comparing (ESE) and actual dose to area of interest the actual dose is? - Answer-
lower than (ESE)
*you always want to overestimate w/ ESE
the recommended SID for routine radiography ? - Answer-44"-48"
what should be used in an effort to minimize pt dose? - Answer-longer SODS'S
minimize pt dose
how is (ESE) calculated ? - Answer-at the min SOD
what are the 2 classes of digital radiographic systems? - Answer-1. direct
2. indirect
computers operate using what type of language? - Answer-binary
each binary # is called a? - Answer-bit
an 8 bit word is called a? - Answer-byte
what are the 2 steps to analog digital conversion? - Answer-1. quantification
2. sampling
what posses a third dimension? - Answer-a voxel
a graphical analysis of signal values from min to max values in a data set is termed a ? -
Answer-histogram
the shape and distribution of values on a x-ray exposure histogram is specific to
selected anatomy; the exposure used for the exam? - Answer-T
in that histogram the data is analyzed to identify the? - Answer-values of interest
window level? - Answer-brightness
window width? - Answer-contrast
spatial resolution is controlled by? - Answer-pixel size
QUESTIONS AND ANSWERS
the maximum exposure received by the patient is at the - Answer-(ESE) entrance skin
exposure
the radiation intensity from a diagnostic x-ray unit will vary in a direct relationship with? -
Answer--mAs
-kvp^2
*inverse relationship w/ the square of the distance
which anatomical part will deliver the lowest (ESE)? - Answer--hip *lot of tissue
-pelvis
-l-spine
-elbow
answer: ELBOW *smallest technical factors
a radiographer can reduce pt dose by at least how much % in most examinations by
choosing correct exposure factors? - Answer-50%
to reduce pt exposure the ***** consistent with the image quality should be selected? -
Answer--highest mAs
-shortest distance
-highest kVp
answer: highest kVp
pt ESE decreases as SID increases? - Answer-TRUE
*distance -they have a inverse relationship
when the primary beam field size decreases what happens to pt exposure? - Answer-
decreases
the 3 types of gonad shields? - Answer-1. shape contact
2. flat contact
3. shadow contact
when using a radiographic grid will it decrease or increase pt exposure? - Answer-
increase *have to shoot more mAs when using grids for quality
entrance skin exposure (ESE) is considered what type of exposure? - Answer-
MAXIMUM
, why Is skull radiography PA projection preferred over AP? - Answer--less exposure to
eyes
when pt SID or SOD increases pt (ESE) does what? - Answer-decreases
*inversely proportional
when comparing (ESE) and actual dose to area of interest the actual dose is? - Answer-
lower than (ESE)
*you always want to overestimate w/ ESE
the recommended SID for routine radiography ? - Answer-44"-48"
what should be used in an effort to minimize pt dose? - Answer-longer SODS'S
minimize pt dose
how is (ESE) calculated ? - Answer-at the min SOD
what are the 2 classes of digital radiographic systems? - Answer-1. direct
2. indirect
computers operate using what type of language? - Answer-binary
each binary # is called a? - Answer-bit
an 8 bit word is called a? - Answer-byte
what are the 2 steps to analog digital conversion? - Answer-1. quantification
2. sampling
what posses a third dimension? - Answer-a voxel
a graphical analysis of signal values from min to max values in a data set is termed a ? -
Answer-histogram
the shape and distribution of values on a x-ray exposure histogram is specific to
selected anatomy; the exposure used for the exam? - Answer-T
in that histogram the data is analyzed to identify the? - Answer-values of interest
window level? - Answer-brightness
window width? - Answer-contrast
spatial resolution is controlled by? - Answer-pixel size
