Final Flashcards
every 5 degrees of tube tilt you have to move the tube
forward 1 inch
CR for AP thoracic is directed where
T6
“ten day rule”
during 10 after onset of menstration
CR for a vertex
film tilt 25-35*
C1
center
max energy of a photon in xray
kvp
most to least radioopaque
metal, bone, water, fat, air
maintain constant radiographic density on film with
inc 15% kvp
dec mAs 1/2
intensifying screen is in the
cassette
what does not protect against radiation
grid
scatter increases when what increases
kvp
function of filter
remove soft xray
radiographic contrast
tonal relationship between one density and another
type of radiation major constituent emitted from target
bremsstrahlung
sacrum and coccyx AP view different why
different angles
electrostatic law
electron repel another electron
OID decrease
image magnification directly decreases
interaction between xray photons and matter most significant to patient dose
photoelectric effect
what kind of pelvic angle does and male have
acute
thorasic vert on pt with sig scoliosis best seen how
convexity closest to the film
collimnation is important to
increase contrast
decrease pt exposure
CR L5/S1 sacrum coccyx AP projection
perpendicular to plane of object to be radiographed
lat sacrum veiw tube tilt
zero*
rule out spondlyo using what view
lat L5/S1 spot
mAs control what in the beam
photon
z joint on cervical spine best visualized on what view
lateral cervical
angle of the jaw is at what level
C3
vertebral prominence is at what level
C7
episternal notch is at what level
T2-T3
umbilicus is at what level
L3-L4
thyroid cartilage is at what level
L5
PSIS is at what level
S2
inferior angle of the scapula is at what level
T6
major advantage of the AP lumbopelvic view taken PA on large patient
more uniform rad density compensation
swimmers view visualizes
C6-T2
flex/ext projection same SID as lateral b/c
better comparison structure size from film to film
principle factor control xray pnentration
kilovolts
increse image quality decrease rad dose=
fixed kvp variable mAs and constant density
lat cerv f/e view taken when
lig stability damage
IVF of lumbar spine best seen how
lat view
best tech factors for xray projection to avoid blur
high ma with shortest time
CR lat cervical f/e
C4 72in SI
pt exhale and hold why on lateral cerviacl
get the shoulder out of the way
