Findings GW

Question 1

Normal thyroid uptake

Answer 1

4-6 hours: 6-18%

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

Question 2

Rim sign

Answer 2

Severe, gangrenous, acute cholecystitis

Question 3

Normal GBEF

Answer 3

Over 35%

Question 4

Abnormal GBEF

Answer 4

<35% indicates acalculus cholecystitis

Question 5

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

Answer 5

Cystic duct obstruction (acute cholecystitis)

Question 6

Delayed visualization of the gallbladder (you see it later)

Answer 6

Chronic cholecystitis

Question 7

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

Answer 7

Common bile duct obstruction

Question 8

Renal uptake on Ga67 infection scan

Answer 8

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

Question 9

Can increase Ga67 concentration in the skeleton

Answer 9

Blood transfusions, chemotherapy, iron therapy

Question 10

Decreased Ga67 uptake can be caused by

Answer 10

MRI gadolinium contrast 24 hours prior to

Question 11

Normal biodistribution for Ga67

Answer 11

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

Question 12

Platelets tagged along with WBCs will result in a false ____

Answer 12

False positive

Question 13

Normal biodistribution for In111 labeled WBCs

Answer 13

Spleen
Liver
Bone marrow

(In order of intensity)

Question 14

Normal plasma amount

Answer 14

3-6 L

Question 15

Kidneys on HIDA

Answer 15

Increased bilirubin levels

Question 16

Biodistribution % of sulfur colloid

Answer 16

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

Question 17

Single of multiple cold spots on liver

Answer 17

Tumors, cysts, abscesses

Question 18

Decreased or uneven uptake throughout the liver

Answer 18

Diffuse liver disease - cirrhosis and hepatitis

Severe cases show colloid shift

Question 19

Colloid shift

Answer 19

Visualization of bone marrow and spleen more so than liver

Question 20

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

Answer 20

Acute cholecystitis, usually associated with cystic duct obstruction

Question 21

Negative biliary atresia/phenobarbital scan

Answer 21

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

Question 22

Positive biliary atresia

Answer 22

Tracer will never be excreted into the bowl

Question 23

Normal distribution for HIDA

Answer 23

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

Question 24

Abnormal findings on HIDA

Answer 24

<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

Question 25

Liver hemangioma positive

Answer 25

Decreased or normal perfusion on flow, increased uptake on delays

Question 26

What scan is almost 100% accurate

Answer 26

Tc99m labeled RBCs liver hemangioma detection

Question 27

Positive Meckels is seen how long after injection

Answer 27

10-15 minutes

Question 28

Tc labeled RBC uptake for GI bleed

Answer 28

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

Question 29

Positive GI bleed with sulfur colloid will be visualized when

Answer 29

5 mins after injection

Question 30

Abnormal uptake in salivary gland imaging

Answer 30

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

Question 31

Breath test results

Answer 31

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

Question 32

Retention of Xe after 2-3 or washout may indicate

Answer 32

Obstructive lung disease

Question 33

Decreased or absent tracer on aerosol ventilation mean

Answer 33

Segments of lungs not ventilated

Question 34

% lung function perfusion of each lung

Answer 34

Right lung 55% Left lung 45%

Question 35

Normal radioiodine uptake outside of thyroid

Answer 35

Salivary glands, stomach, bladder

Question 36

Normal hematocrit red cell volume

Answer 36

35-48%