Nuclear Noggin
This quality allows certain tracers to cross the BBB
Lipophilic
what organ realeases norepinephrine and epinephrine into the body?
Adrenal Glands
This is the primary reason for wholebody bone scan
assessing for mets
these 2 tracers are used for brain imaging but do not cross the BBB.
DTPA
TcO4
This exposure rate must be met before a hospitalized radionuclide therapy patient can be released.
What is 7 mR/hr at 1 meter
This is a signature sign of a positive brain death study and appears hawt.
Nose
these are the 4 steps to thryoid processing of iodine into T3 and T4
1. iodine trapping 2. organification, 3. coupling, 4. release and storage
This calcium phosphate crystal is responsible for the uptake of most Tc-99m bone imaging agents
What is hydroxyapatite
This tracer requires a fresh generator eluate.
Tc-99m HMPAO (Ceretec)
After cleaning up an inpatient I-131 therapy room, these must also be performed before the area can be considered safe.
What are wipes and surveys
This study is used to evaluate cerebrovascular reserve in patients.
Diamox challenge
this is the indication if a parathyroid "washes out" the tracer on the 2 hour delay
What is a normal study
hardware in the spine would best be assessed by which scan(s)?
3 phase bone + SPECT
If you answered this tracer for VP shunt imaging on any exam during the semester, you were right. If you answered it on the board review... well, that's another story.
What is DTPA
This is considered an absolute contraindication to I-131 thyroid ablation, even if it is only suspected.
What is pregnancy or possible pregnancy
In seizure focus imaging, this phase occurs during the seizure and demonstrates hyperperfusion and hypermetabolism.
Ictal
this endocrine organ is prominant in pediatric patients but is small in adults
what is the thymus
name 3 of the 7 reasons there would be uptake on the flow, blood pool, and delay images of a three phase bone scan
1. arthritis, 2. full fracture, 3.osteomylitis, 4.cellulitis, 5. RSD/CRPS (first year), 6. primary malignant tumors, 7. prothesis loosening
Although largely replaced by MDP and HDP for skeletal imaging, this "forgotten" bone agent still has a role in amyloid heart imaging.
What is Tc-99m pyrophosphate (PYP)
This organ receives the highest radiation dose after thyroid tissue during I-131 therapy because it is responsible for excreting the radiopharmaceutical.
What is the urinary bladder
This tracer is most commonly used for cisternography?
In-111 DTPA.
Unlike MIBG, this radiopharmaceutical localizes in the adrenal cortex and is used to evaluate cortical adenomas and hyperfunctioning adrenal tissue.
What is NP-59 (I-131 iodomethyl norcholesterol)
areas of normal tracer uptake on a bone marrow scan besides bone marrow
liver and spleen
A mismatch between In-111 labeled WBC uptake and this tracer's bone marrow distribution is highly suggestive of osteomyelitis.
What is Tc-99m sulfur colloid
This medication can be used instead of thyroid hormone withdrawal to elevate TSH before I-131 thyroid ablation, allowing patients to remain on levothyroxine.
What is Thyrogen