Oncology Flashcards
Organ specific radiopharmaceuticals for thyroid testing are 99m Tc and 123 / 131 I-NaI (T/F)
TRUE
The main indication for scintigraphy of thyroid tissue are benign diseases of the
thyroid gland (T/F)
FALSE
Scintigraphy of the adrenal medulla serves to confirm the diagnosis of
pheochromocytoma and other paragangliomas in patients with biochemically
proven disease (T/F)
TRUE
Positron emission tomography is a modern diagnostic and research visualization
technique (T/F)
TRUE
PET is a non-invasive technique that examines biochemical, metabolic and
receptor processes (T/F)
TRUE
Positron emitters emit gamma radiation (T/F)
FALSE
Of the positron emitters, 11 C is most commonly used in clinical practice (T/F)
FALSE
Positron emitters are short-lived radionuclides (T/F)
TRUE
The most common way to obtain positron emitters is in a nuclear reactor (T/F)
FALSE
Positron emitters are incorporated into numerous biomolecules (T/F)
TRUE
The half-life of 18 F is 120 minutes (T/F)
TRUE
Positron emitters can be obtained in the generator (T/F)
TRUE
Tumor cells have elevated intracellular concentrations of hexokinase, which
phosphorylate glucose and 18 F-FDG thereby trapping them within the cell (T/F)
TRUE
18 F-FDG-mechanism of accumulation in tumors:
a) Elevated levels of energy-dependent transmembrane transport protein (GLUT)
b) Tumor cells have elevated intracellular hexokinase concentration
c) Increased perfusion in tumors
d) All of the above (a, b, c)
D
18 F-FDG accumulates:
a) Only in malignant tumors
b) In malignant tumors and in infectious / inflammatory regions
c) Only in benign tumors
d) All of the above (a, b, c)
B