chapter 9: patient prep and imaging in oncology Flashcards
FDG is an analog of
A-glucose
B-glucose
C-glucose
D-glucose
D-glucose
what is the pediatric dosing for fdg?
0.1 mci/kg
0.01 mci/kg
0.2 mci/kg
0.02 mci/kg
0.1 mci/kg
TPN therapy should be discontinued at least…prior to fdg administration
6 hours
12 hours
18 hours
24 hours
48 hours
24 hours
T/F: patients who use rapid-acting or short-acting insulin must discontinue use at least 4 hours prior to fdg administration
false. they may inject rapid-acting or short-acting and begin fdg administration 2-3 hours later as they are absorbed quickly
the major transporter used for glucose uptake in muscle is
GLUT2
GLUT4
GLUT6
GLUT8
GLUT4
a patient is getting a pet/ct scan for lesions in the bladder wall. when should diuretics be administered to reduce bladder activity?
10-15 mins after fdg administration
10-15 mins before fdg administration
20-30 mins after fdg administration
20-30 mins before fdg administration
10-15 mins before fdg administration
patients with…may benefit from a longer localization time of fdg
brain cancer
lymphoma
leukemia
hepatocellular carcinoma
liver mets
both hepatocellular carcinoma and liver mets
both hepatocellular carcinoma and liver mets
what is the specific enzyme in the liver that cleaves the glucose-phosphate bond?
glucose-6-phosphonate
glucose-4-phosphatase
glucose-6-phophatase
glucose-4-phosphonate
glucose-6-phosphatase
after hexokinase converts FDG to FDG-6-phosphate, the FDG
undergoes further phosphorylation and metabolism via the glycolytic pathway
does not undergo further phosphorylation and metabolism, becomes metabolically trapped in the cell
does not undergo further phosphorylation and metabolism, becomes metabolically trapped in the cell
T/F: there is more fdg uptake in white matter than gray matter
false. there is more fdg uptake in gray matter than white matter
T/F: the heart uses glucose in the fed state
true - the heart uses fatty acids in the fasting state
the thymus appears as…on fdg images
inverted C shape
inverted U shape
V shape
inverted V shape
inverted V shape
brown fat is most prevalent in
pediatrics
adolescents
adults
geriatrics
both pediatrics and adolescents
both adolescents and adults
pediatrics
T/F: normal glucose is primarily excreted through the kidneys and bladder
false. this is true for f18 fdg.normal glucose is reabsorbed in the proximal tubules
a transmission scan is typically
1-5 mins long
2-4 mins long
3-6 mins long
10 mins long
2-4 mins long
