CTC Charts

Question 1

Energy and Physical Half Life of Tc-99m?

Answer 1

“Low” - 140

6 hours

Question 2

Analog, Energy and Physical Half Life of I-123?

Answer 2

Iodine
“Low” - 159
13 hours

Question 3

Energy and Physical Half Life of Xenon-133?

Answer 3

“Low” - 81

125 hours - biologic t1/2 of 30 sec

Question 4

Analog, Energy and Physical Half Life of Thallium-201?

Answer 4

Potassium
“Low” - 135 (2%), 167 (8%), use 71 201-Hg daughter x-rays
73 hours

Question 5

Energy and Physical Half Life of Indium-111?

Answer 5

“Medium” - 173 (89%), 247 (94%)

67 Hours

Question 6

Analog, Energy and Physical Half Life of Gallium-67?

Answer 6

Iron
Multiple: 93 (40%), 184 (20%), 300 (20%), 393 (5%)
78 hours

Question 7

Analog, Energy and Physical Half Life of I-131?

Answer 7

Iodine
“High” - 365
8 days

Question 8

Analog, Energy and Physical Half Life of F-18?

Answer 8

Sugar
“High” - 511
110 min

Question 9

Half life of Strontium-89?

Answer 9

50.5 days (14 days in bone)

Question 10

Half life of Samarium-153?

Answer 10

46 hours

Question 11

Half life of Y-90?

Answer 11

64 hours

Question 12

Mechanism, Normal Distribution, and Critical Organ of MDP?

Answer 12

Phosphate Analog - Mechanism is “chemisorption”
Bones, kidneys
Renal

Question 13

Mechanism, Normal Distribution, and Critical Organ of Free Xe-133?

Answer 13

Not absorbed (inspired) - can diffuse into fat
Airways
Trachea/airways

Question 14

Mechanism, Normal Distribution, and Critical Organ of MAA?

Answer 14

Albumin - gets stuck in capillary (10-100 microns)
Lungs
Lungs

Question 15

Mechanism, Normal Distribution, and Critical Organ of Sulfur Colloid?

Answer 15

Phagocytized by RES
Liver, Spleen, Bone Marrow
Proximal Colon

Question 16

Mechanism, Normal Distribution, and Critical Organ of HIDA?

Answer 16

Bilirubin analog
Liver, GB, Bowel
GB wall

Question 17

Mechanism, Normal Distribution, and Critical Organ of WBC?

Answer 17

Tagged neutrophil - goes to RES, or area of active inflammation
Spleen, liver, bone marrow
Spleen

Question 18

Mechanism, Normal Distribution, and Critical Organ of RBC?

Answer 18

Tagged RBC - circulated in blood
Blood pool
Heart

Question 19

Mechanism, Normal Distribution, and Critical Organ of MAG3?

Answer 19

Actively secreted
Kidneys, bladder
Bladder

Question 20

Mechanism, Normal Distribution, and Critical Organ of DMSA?

Answer 20

Binds to sulhydryl group in proximal tubule
Kidneys
Kidney

Question 21

Mechanism, Normal Distribution, and Critical Organ of Pertechnetate?

Answer 21

Active transport in the thyroid
Stomach, salivary glands, and thyroid
Stomach

Question 22

Mechanism, Normal Distribution, and Critical Organ of Free Ga-67?

Answer 22

Iron analog, taken up by bacteria and WBC
Liver, lacrimal and salivary glands, bones, minimal lungs
Distal colon

Question 23

Mechanism, Normal Distribution, and Critical Organ of FDG?

Answer 23

Glucose analog
Brain, heart, liver, blood pool
Bladder

Question 24

Mechanism, Normal Distribution, and Critical Organ of Sestamibi?

Answer 24

Active Transport
Salivary glands, GI tract, heart, kidneys, thyroid, parathyroid
Proximal colon

Question 25

Mechanism, Normal Distribution, and Critical Organ of Thallium-201?

Answer 25

Potassium analog active transport (Na/K pump) Heart, kidneys Renal cortex

Question 26

Mechanism, Normal Distribution, and Critical Organ of Pentreotide?

Answer 26

Octreotide Analogue Spleen, liver, kidneys, bladder Spleen

Question 27

Mechanism, Normal Distribution, and Critical Organ of MIBG?

Answer 27

Analog of norepinephrine. Enters neuroendocrine cells by active uptake mechanism via the epinephrine transporter and is stored in the neurosecretory granules Thyroid, heart, liver, spleen, salivary gland Spleen

Question 28

Mechanism, Normal Distribution, and Critical Organ of HMPAO?

Answer 28

Lipophilic, crosses BBB Brain, blood pool Bladder

Question 29

Mechanism, Normal Distribution, and Critical Organ of DTPA (cistern)?

Answer 29

Water soluble CSF, kidney, bladder Spinal cord

Question 30

Mechanism, Normal Distribution, and Critical Organ of Iodine?

Answer 30

Active transport into the thyroid Thyroid, nasopharynx, salivary glands, stomach, bowel, bladder Thyroid