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37 Cards in this Set

  • Front
  • Back
swyer james syndrome
pathophys
unilateral or focal post-infectious obliterative bronchiolitis, an acquired hypoplastic lung dz

air enters lungs by a drift phenomenon and becomes trapped because of bronchiolar obx
general imaging findings of swyer james syndrome
focal lung hyperlucency
decreased vascularity
nml-decreased volume of affected lung
air trapping in affected lung
nuclear medicine findings of swyer james
what is another name for swyer james syndrome
unilateral matched v/q defect

acquired hypoplastic lung dz
what bv serves the following in heart:
anterior
inferior
lateral
septal
LAD
RCA/PDA
LCx
LAD, septal perforators
what can help you exclude breast attenuation as a cause of a non-reversible defect on cardiac stress test
breast attenuation spares the apex of the heart
what is transient ischemic dilatation
the cavity gets bigger during contraction
in what scenario would you get an FDG PET MIP on a pt who is s/p total thyroidectomy for thyroid ca
thyroid ca is usually monitored by i131 and tgo lvls
elevate thyroglobulin and a negative i 131 scan
in a de-differentiated thyroid ca, i131 won't be taken up (cold nodule), so you have to use pet.
what % of pts with chronic cholecystitis have a nml hida scan
90%
why shouldn't whole body i131 scintigraphy be performed immediately after administration of dose
isotope won't be in thyroid
why shouldn't whole body i131 scintigraphy be performed immediately after administration of dose
i131 will still be too bright
when is the ideal time to image a pt after whole body i131 scintigraphy
5-7 days
what is the purpose of whole body i131 scintiraphy
to make sure you didn't miss anything after pt has been treated
what would you expect to see if an intra-arteral inection during bone scan was accidentally performed
you would only see the hand.
what would you expect to see if during injection prior to bone scan, there was extravasation of the isotope
you would have visualization of LN (similar to doing a lymphoscintigraphy)
what dzs are adventagous to dx with ga-67
diskitis
malignant otitis externa
pcp
granulomatous dz
sarcoid
fungal infx
what % of diskitis is missed if in-111 is used
75%!
what T score corresponds with osteopenia
-1 - -2.5
what T score is nml
>= -1
what T score corresponds with osteoporosis
<= -2.5, no fx
what T score corresponds to established osteoporosis
<= -2.5, with fx
what test looks for radiochemical purity, free of Tc and Tc colloids
thin layer chromotography
what test looks for pyrogencity
limulus lysate test, which uses horseshoe crab extract to form gel when mixed with endotoxins
what test looks for alumina
colorimetric paper testing
what test looks for Mo-99 breakthrough
lead shield testing that looks at a ratio of Mo-99 to Tc 99m
(dose limit 0.15kBq Mo/1MBq Tc99m)
what would make the dx of diaphragmnatic attenuation more favorable than inferior wall ischemia
diaphragmatic attenuation usually persists at rest and during stress, unless position of pt has drastically changed.
which is more common in women: malignant or benign thyroid disease
benign
is thyroid CA more common in men or women?
women
MOA tc99m sestamibi
distributes into cells with high mitochondrial content and gets taken up because of increased membrane potential
which thyroid ca most often has skeletal mets
follicular
what is the agent used in a pth scan
tc99m labeled sestamibi
which can be visualized with a gamma camera:
quadramet or metastron
quadramet
which is more clinically effective in managing pain from mets:
quadramet or metastron
quadramet
which has more BM toxicity:
quadramet or metastron
which has a faster recovery time
quadramet
quadramet
which primary malignancies give you cold expansile, lytic lesions on bone scan
breast and lung >>> RCC, thyroid CA
what changes on a bone scan would you expect in a pt with severe osteoporosis
decresaed activity in skeletal system with increased activity in the soft tissues
where would you see metastatic calcifications from thyroid CA
increased activities in stomach, lungs, kidney, ST
where would you expect to see free Tc99m and why does it happen? how can you test for it
stomach, thyroid, salivary glands
poor labeling of MDP
check for it with TLC