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Procedures > Findings GW > Flashcards

Findings GW Flashcards

1
Q

Normal thyroid uptake

A

4-6 hours: 6-18%

24 hours: 10-35%%
- hypothyroidism: below 5%
- hyperthyroidism: above 35%

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2
Q

Rim sign

A

Severe, gangrenous, acute cholecystitis

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3
Q

Normal GBEF

A

Over 35%

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4
Q

Abnormal GBEF

A

<35% indicates acalculus cholecystitis

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5
Q

Non visualization of gallbladder after morphine or after delayed imaging (you never see it)

A

Cystic duct obstruction (acute cholecystitis)

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6
Q

Delayed visualization of the gallbladder (you see it later)

A

Chronic cholecystitis

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7
Q

Non visualization of small bowel or delayed biliary to bowel transit time

A

Common bile duct obstruction

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8
Q

Renal uptake on Ga67 infection scan

A

Renal activity visualized within first 24 hours, any visualization after that is indicative of disease

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9
Q

Can increase Ga67 concentration in the skeleton

A

Blood transfusions, chemotherapy, iron therapy

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10
Q

Decreased Ga67 uptake can be caused by

A

MRI gadolinium contrast 24 hours prior to

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11
Q

Normal biodistribution for Ga67

A

Nasopharynx, lacrimal glands, salivary glands, bony thorax (ribs, sternum, clavicle, scapulae), penis, liver, kidneys, colon contents, and pelvis, epiphyses in peds

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12
Q

Platelets tagged along with WBCs will result in a false ____

A

False positive

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13
Q

Normal biodistribution for In111 labeled WBCs

A

Spleen
Liver
Bone marrow

(In order of intensity)

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14
Q

Normal plasma amount

A

3-6 L

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15
Q

Kidneys on HIDA

A

Increased bilirubin levels

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16
Q

Biodistribution % of sulfur colloid

A

85% in liver
10% in spleen
Remainder in bone marrow

17
Q

Single of multiple cold spots on liver

A

Tumors, cysts, abscesses

18
Q

Decreased or uneven uptake throughout the liver

A

Diffuse liver disease - cirrhosis and hepatitis

Severe cases show colloid shift

19
Q

Colloid shift

A

Visualization of bone marrow and spleen more so than liver

20
Q

Non visualization of gallbladder after morphine is given (or never seeing gallbladder in delays)

A

Acute cholecystitis, usually associated with cystic duct obstruction

21
Q

Negative biliary atresia/phenobarbital scan

A

Nonobstructive causes of neonatal jaundice demonstrate excretion of tracer into bowel by 24 hours

22
Q

Positive biliary atresia

A

Tracer will never be excreted into the bowl

23
Q

Normal distribution for HIDA

A

See hepatic ducts and GB by 15-30 minutes
See GB by 45-60 minutes
See small bowel by 30 minutes

24
Q

Abnormal findings on HIDA

A

<35% GBEF = acalculous cholecystitis

No visualization of gallbladder = acute cholecystitis

Delayed visualization of gallbladder = chronic cholecystitis

No visualization of small intestines = common bile duct obstruction

Bile leak

25
Q

Liver hemangioma positive

A

Decreased or normal perfusion on flow, increased uptake on delays

26
Q

What scan is almost 100% accurate

A

Tc99m labeled RBCs liver hemangioma detection

27
Q

Positive Meckels is seen how long after injection

A

10-15 minutes

28
Q

Tc labeled RBC uptake for GI bleed

A

Liver, spleen, abdominal vessels, kidneys, bladder, genital organs, stomach

29
Q

Positive GI bleed with sulfur colloid will be visualized when

A

5 mins after injection

30
Q

Abnormal uptake in salivary gland imaging

A

Metastatic disease - areas of decreased uptake
Warthins tumor - increased uptake
Benign tumors, cysts - cold spots
Sjorgen - asymmetrical arrival tracer or delayed uptake compared to thyroid, suppressed response to lemon

31
Q

Breath test results

A
  • Negative: <50 dpm
  • Interdeterminate: 50-199 dpm
  • Positive: >199 dpm or anything 4x background or greater
32
Q

Retention of Xe after 2-3 or washout may indicate

A

Obstructive lung disease

33
Q

Decreased or absent tracer on aerosol ventilation mean

A

Segments of lungs not ventilated

34
Q

% lung function perfusion of each lung

A

Right lung 55%

Left lung 45%

35
Q

Normal radioiodine uptake outside of thyroid

A

Salivary glands, stomach, bladder

36
Q

Normal hematocrit red cell volume

A

35-48%

Procedures (17 decks)

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