Mosby Book exam 1 wrong answers Flashcards
which of the following is concidered isomolar:
A) iodixanol
B) iopamidol
C) iohexol
D: ioversol
A
Which of the following is considered one of the ionic radiopaque contrast media (RCM)
A) iohexol
b) iohalamate meglumine
c) iopamidol
d) ioversol
B
The radiation dose index calculation that takes into account the variations in absorbtion across the field of view due to beam hardining is termed:
a) CTDIw
b) CDDI100
c) CTDI vol
d) MSAD
A
unit that Expresses total PT dose from a helically aquiered CT exam
mGy-cm
is calculated from measurements made with dosimeters positioned at te center and perifery of a phatom and accounts for varience in dose distribution due to the effects of beam hardining:
CTDIw
Hepatic arterial phase happen at:
25-35s
abdominal bifercatino happens at
L4
on an ECG at what point in the R-R interval is the heart in diastlole:
55-75%
in a rt lateral decubitus, the right isde is:
down on the table
For an exam of the neck what wouould be an appropriate survey:
3-6mm
most common wrist carble bone to have a fracture:
scaphoid
what technique can remove cardiac pussation artifact durring a CTA of the chest fot pulmonary embolism?
retrospective ECG gating,
if the artifact is present it has to be retrospective.
diffuse fatty infiltration of the fatty parechyma:
steatosis
during a ct of the larnx, what is the pourpos of having the pt vocalize:
to evaluate the vocal cords
brpncidis, emphysima,aspestossis, sarcoidosis
intersticial lung disease
abnormal comunication between the bowel and the bladder:
enterovesicle fistula
bowel clense before a CT colongraphy
caharsis
cramping pain in the legs due to poor circulation:
claudation
imiging plane parellel to the foots plantar surface
axial
pituitary glad can best be seen in what plane:
coronal
the adult spinal cord ends at what level:
l1-l2
fibroid tumor of the uterus
leiomyoma
which anatomic organs is located within the peritoneal cavity:
pncreas
kidney
uterus
liver
liver
an exam of the pelvis should be from
the illiac crest to the pubic symphysis
the SFV for the c-spine:
large SFOV 48-50CM LARGE DFOV 10-15CM
to show air trapping in the brocheal tre you would use a MPVR know as:
min-IP
a MDCT has a beam shape of:
cone
a series of aquisitions of one area over a period of time:
cine
the rate at which a quantity of x-radiation emited passes throug a unit area over time:
photon flux
flux=rate
fluence = quantity
a standard CT image reconstructed on a 512x512 matrix has a digital size of:
0.5mb
the relationship between the linnear attenuation coefficent of an object and the calculated CT number:
linearity
the high frequenct generator is locate where:
inside the operators console
3D CT technique that uses all the voxel info with adjustments to opacity
Volume rendering
mathmatical filter to remove blurring:
convolution
used to record flashes of light in a SSD
photodiode
how do you increace average energy:
increase filtartation.
when a pt is too big for the gantry it causes:
out of field artifact: solved by centering
perpendiculare to the original plane of imaging:
orthogonal
