Trivia Flashcards
(168 cards)
1
Q
The spleen will be bright for which three radiotracers?
A
In-WBC
Sulfur Colloid
Gallium
2
Q
Which two radiotracers will have a bright heart?
A
MIBI-123 (sestamibi)
MIBG
3
Q
Which analogue of MIBI will be in the heart?
A
MIBG-123
4
Q
Which analogue of MIBI will NOT be in the heart?
A
MIBG-131
5
Q
Other than the heart, which organ will MIBG-131 naturally accumulate?
A
Liver
6
Q
Bright heart and kidneys is what radiotracer?
A
MIBI-123
7
Q
Which radiotracer will have a VERY bright spleen and kidneys?
A
Octreotide
8
Q
Which two radiotracers will accumulate in the bones but NOT the lacrimal glands?
A
sulfur colloid and In-111 WBCs
9
Q
What two radiotracers can be attached to MIBG?
A
I-123
I-131
10
Q
Can the adrenals faintly take up I-123 or I-131?
A
I-123
11
Q
What is added to Free Tc? What will this cause it to bind to? Oxidation or reduction?
A
stannous/tin
reduced
MDP
12
Q
What three organs will free Tc be found in?
A
gastric
salivary
thyroid
13
Q
What is the mechanism of MDP binding to bone?
A
Chemisorption
14
Q
Where in the bone can MDP bind in kids?
A
Epiphyses
15
Q
Marked skull suture uptake can be seen in what condition?
A
renal osteodystrophy
16
Q
Renal cortices being hotter than the adjacent lumbar spine can be indicative of what disease?
A
Hemochromatosis
17
Q
What four conditions can cause LIVER uptake of MDP?
A
too much Aluminum
hepatoma/mets
amyloidosis
liver necrosis
18
Q
Diffusely decreased skeletal uptake can be seen in which two conditions?
A
free Tech
bisphosphanates
19
Q
A bone scan should be obtained WHEN to exclude a fracture in the elderly?
A
One week
20
Q
Muscular uptake of MDP could indicate what?
A
Rhabdo
21
Q
Linear periosteal uptake should make you think what?
A
Hypertrophic Osteoarthropathy
22
Q
Does heterotopic ossification occur outside in or inside out?
A
Outside to In
23
Q
When is AVN hot on bone scan?
A
middle (repairing)
24
Q
WHen is AVN cold on bone scan?
A
early and late
25
What three radiotracers, when in the bone, are almost always indicative of mets?
I-131
MIBG
Octreotide
26
What FIVE benign bone lesions are HOT on bone scan?
Fibrous Dysplasia
Osteoid Osteoma
Osteoblastoma
Giant cell
ABC
27
What is Flare phenomenon?
HOT healing osseus metastatic lesions
28
What are the two imaging modalities of choice for D/O?
MRI
Gallium
29
Sulfur colloid will target which three organs?
Bone
Liver
Spleen
30
What is the critical organ of In-111-WBC scan?
Spleen
31
What is the biologic half life of MAA?
4 hours
32
What is the biological half life of Xe-133?
30 seconds
33
What is the KeV of Xe-133?
81
34
Do MAA or Xenon first? Why?
Xe-133
lower energy
35
MAA in brain means what?
Shunt
36
What is the size of MAA particles?
10-100 micrometers
37
What causes MAA clumping?
blood in syringe
38
Retained Xe-133 in lungs means?
trapping/copd
39
What does Xe-133 in liver mean?
fatty liver
40
Do what to MAA when a shunt is known?
reduce particle #
41
The body treats gallium as if it were what ion?
Iron
42
Can gallium or indium bind dead neutrophils?
gallium
43
What is the half life of gallium?
78 hours
44
What mechanism does gallium decay?
electron capture
45
What is the critical organ for gallium?
The colon
46
Gallium uptake can be indicative of what disease?
sarcoidosis
47
Is kaposi gallium or thallium hot?
Thallium
48
Whats the half life of I-131?
8 days
49
What is Kev of I-131?
364
50
What type of emitter is I131?
beta negative
51
What is half life of I-123?
13 hours
52
What is energy of I-123?
159 kev
53
How does I-123 decay?
electron capture
54
When can Tc-99m resume breastfeeding?
12-24 hours
55
When can I-123 resume breastfeeding?
2-3 days
56
When can I-131 resume breastfeeding?
never
57
What is normal RAIU?
5-15% at 4-6 hours
10-35% at 24 hours
58
What is Plummer disease?
multinodular toxic thyroid goiter
59
Does papillary or medullary not drink I-131?
Medullary
60
Prior use of what drug can cause the thyroid not to drink I-131?
Methimazole
61
Residual thyroid greater than what % can cause a painful ablation?
5%
62
What scans for medullary thyroid?
MIBG or octreotide
63
How much I-131 for thyroid only?
100
64
How much I-131 for thyroid only and nodes?
150
65
How much I-131 for thyroid only and distant?
200
66
What is the actvity to keep an I-131 patient hospitalized? At what distance?
33 mCi of residual activity
1m from chest?
67
What disease can increase risk of salivary gland damage for I131 ablation?
Sjogrens
68
What marker is used for recurrence after I131 ablation?
thyroglobulin
69
What are the two absolute contraindications to I131 ablation?
pregnancy
thyrotoxicosis
70
Where does diasylate go for an I131 ablation patient?
sewer
71
Where does dialysis tubing go for an I131 ablation patient?
storage until cleared
72
What drug for hyperthyroid in pregnancy?
PTU
73
What is the tracer for parathyroid adenoma?
Tc-99m Seatamibi
74
Parathyroid adenomas have a large amount of what two things?
blood flow and mitochondria
75
What are the two radiotracers used for brain parenchymal imaging?
HMPAO
ECD
76
Which brain radiotracer is not extracted?
DTPA
77
Does HMPAO or ECD washout slowly?
ECD
78
Which radiotracer is essentially angiographic?
DTPA
79
What is the timeframe for injection of tracer for seizure?
30 seconds
80
What are the two peaks for thallium?
69 and 81
81
Is toxoplasma thallium positive or negative?
negative
82
Is lymphoma thallium positive or negative?
positive
83
Is kaposi thallium positive or negative?
positive
84
Where does radiotracer for brain death study have to be seen for study to be called adequate?
common carotid
85
What is the radiotracer for CSF imaging?
In-111-DTPA
86
CSF nuke study should have radiotracer over the cerebral ventricles by what time period?
24 hours
87
How is NPH diagnosed on nukes?
tracer in lateral ventricles > 24 hours
88
Pledget ratio greater than what is diagnostic for CSF leak?
1.5
89
Do solids or liquids have a lag phase on gastric emptying?
Solids
90
All prokinetic or anti-kinetic drugs need to be stopped for how many days prior to gastric emptying study?
Two days
91
GI bleeding rates can be detected as low as WHAT on nukes?
0.1 mL/minute
92
Do RBCs need to be reduced or oxidized prior to tagged study? With what?
reduced
tin
93
What is the most common cause of failure of tagging RBCs?
drug interactions
94
What radiotracer is used for a meckel scan? Why?
pertechtenate
binds ectopic gastric cells
95
What two meds are used for a meckel scan?
Pentagastrin
H2 blockers
96
NPO for how many hours prior to HIDA?
FOUR hours
97
Need to have eaten with how long prior to HIDA?
24 hours
97
Need to have eaten with how long prior to HIDA?
24 hours
98
EF below what number for chronic cholecystitis?
30%
99
What is CCK dose?
0.02 microgram/kg over 60 mins
100
What is morphine dose?
0.02-0.04 mg/kg over 30-60 mins
101
What two medications are known to cause cholestatic jaundice?
erythromycin and OCPs
102
What is phenobarb dose for pediatric HIDA?
5 mg/kg x 5 days
103
Pediatric HIDA may need to get delays until what time point?
24 hours
104
is FNH hot or cold on sulfur colloid?
hot
105
What is the size of particles for liver sulfur colloid?
0.1 - 1.0 micro-meter
106
What causes Tc to show up in lungs?
"excess aluminum in colloid"
107
What are the two causes of renal uptake of sulfur colloid?
1. CHF
| 2. Rejection of renal transplant
108
What radiotracer is used to 'prove' a hepatic hemangioma? How big does it need to be?
Tc tagged RBCs
> 1.5 cm
109
Which renal radiotracer is almost exclusively filtered? What does this measure? Slightly under-estimate or over-estimate?
DTPA
GFR
Under
110
Which renal radiotracer is almost exclusively secreted? What does this measure?
MAG 3
ERPF
111
Which renal radiotracer is better with poor kidney function?
MAG3
112
What three pathological conditions will have normal flow on renal nukes?
1. ATN
2. Interstitial nephritis
3. Cyclosporin toxicity
113
Other than poor renal function, what else can cause an abnormal lasix renogram?
dehydration
114
How many days should an ACEi be held prior to nukes RAS study?
3-5 days
115
Will acute rejection have normal or decreased perfusion?
decreased
116
WHat fluid collection is seen in the first two weeks post-op from renal transplant?
Urinoma
117
WHat fluid collection is seen6-8 weeks post-op from renal transplant?
lymphocele
118
What two radiotracers preferentially bind the renal cortex?
Tc-DMSA
Tc-Glucoheptonate
119
Is CARCINOID PET hot or cold?
cold
120
Is prostate PET hot or cold?
cold
121
Are oncocytomas PET hot or cold?
HOT
122
What two benign bone lesions are PET HOT?
1. fibrous dysplasia
| 2. giant cell
123
What are the photopeaks of In-111?
173 and 247
124
What ion does indium behave like?
iron
125
What are the three tumor MIBG binds?
Neuroblastoma
Pheo
paraganglioma
126
What gland needs to be blocked before MIBG use? With what?
thyroid
lugols
127
Other than FDG, what radionuclide can be taken up by brown fat?
I-123 MIBG
128
Does prostascint go to soft tissues or osseus mets?
osseus
129
What radiotracer can incidentally accumulate within breast cancer?
Tc-99 Seatamibi
130
What are the two myocardial radiotracers?
sestamibi
tetrofosmin
131
What type of heart block will make EKG stress testing non-diagnostic?
LBBB
132
What is the classic LBBB false positive artifact on perfusion imaging?
reversible anterolateral septal
133
What two pharm stress test agents for patients with LBBB?
adenosine or dipyridamole
134
What will stunned myocardium have for perfusion and contractility?
normal perfusion
bad contractility
135
What will hibernating myocardium have for perfusion and contractility?
bad perfusion
bad contractility
136
What is the radiotracer for MUGA?
Tc-99 RBCs
137
Rubidium 82 is an analogue of what ion?
potassium
138
What is the only PET radiotracer made in a generator?
rubidium
139
Caffeine effects which two cardiac pharmaceutical agents?
adenosine and dipyridimalole
140
Caffeine effects which three cardiac pharmaceutical agents?
adenosine and dipyridimalole and regadenosine
141
What is MOA of dipyridimole?
inhibits adenosine breakdown
142
What is the antidote for adenosine?
aminophylline
143
A patient CANNOT be on which class of medication for a dobutamine stress test?
beta blocker
144
What is the maximum allowable shunt fraction for use with Y90?
>20%
145
What are the photopeaks of Y90?
175 and 185 KeV
146
What is the half life of Y90?
2.67 days
147
What is the critical organ for pertechtenate?
stomach
148
What is the critical organ for DMSA?
renal cortex
149
What is the critical organ for sestamibi?
proximal colon
150
What is the critical organ for MAG3?
bladder
151
What is the critcal organ for gallium?
distal colon
152
What is the critical organ for thallium?
renal cortex
153
What is the critical organ for I-123 MIBG?
bladder
154
What is the critical organ for I-131 MIBG?
liver
155
What is the critical organ for In-ProstaScint?
Liver
156
What is the critical organ for Octreotide?
Spleen
157
What is the critical organ for In-WBCs?
Spleen
158
What is the energy of Tc-99m?
140 KeV
159
What is the physical half life of Tc-99m?
6 hours
160
What is the energy of I-123?
159 Kev
161
What is the half life of I-123?
13 hours
162
What is the energy of Xe-133?
81 Kev
163
What is the PHYSICAL half life of Xe-133?
125 hours
164
What is KeV of I-131?
365
165
What is half life of F18?
110 mins
166
What is half life of I-131?
8 days
167
What is the half life of Ga-67?
78 hours
