Radionuclides

Question 0

In-111 WBC?

Answer 0

l/s, bone, NO kidneys, no GI

Question 1

Octreotide/Somatostatin Scan?

Answer 1

(l/s, kidneys, NO bone)

Can have bowel uptake at 24 hours

Question 2

Which imaging agent is preferred in neutropenia- gallium or WBC?

Answer 2

Gallium- need WBC for accurate WBC scan

Question 3

MIBG scan?

Answer 3

(liver, NO SPLEEN, kidneys, heart, salivary, thyroid, NO bone)

Question 4

What should be given to patient before MIBG?

Answer 4

Lugol’s Solution- potassium iodide

Question 5

F-18?

Answer 5

• F-18 (511 keV, 110 min)

FDG (Brain, cardiac, liver, blood pool), Critical Organ: bladder

Question 6

Gallium-67?

Answer 6

• Ga-6 (93, 184, 296, 393 keV,

Half-life : 78.1 h

– Citrate (gallium scan- liver, lacrimal and salivary, bones, lungs): BOWEL

Question 7

In-111?

Answer 7

• In-111 172, 247 keV

Half-life: 67 h

– DTPA (cisternogram-CSF, kidney bladder): spinal cord
– Labeled WBCs (WBC scan- Spleen, liver, bone marrow): spleen
– Pentetreotide (somatostatin receptor scan- spleen, liver, kidneys, bladder): spleen

Question 8

I-123?

Answer 8

• I-123 (159 keV, 13 h)

– I-123 (thyroid scan and uptake- thyroid, nasopharynx, salivary glands, stomach, bowel, bladder): thyroid

• MIBG: Thyroid, heart, liver, spleen, salivary glands: Critical Organ is bladder

Question 9

I-131?

Answer 9

I-131 ( 364 keV, 8.06 d)

– I-131 (thyroid cancer scan- thyroid, nasopharyn, salivary glands, stomach, bowel, bladder): CO =bladder (imaging after removal/ablation of thyroid tissue)

– MIBG: Thyroid, heart, liver, spleen, salivary glands. CO: LIVER

Question 10

Rb-82?

Answer 10

Rb-82 (511 keV, 1.3 min)

– Rb-82 (myocardial perfusion)

Question 11

St-89 and Sm-153?

Answer 11

• Sm-15 (103 keV, 46 h)

* Sr-89 (pure beta, 50.5 d, 14 days in bone)

Question 12

Tl-201?

Answer 12

keV [75, 135, 170]

T ½ 3 days (73 hour)

CO: Renal Cortex, Kidney

Normal uptake:
 Salivary glands 
 Thyroid 
 Lungs, myocardium 
 Skeletal muscle 
 Liver, spleen, kidneys 
 Bowel, bladder

Question 13

Xe-133?

Answer 13

• Xe-133 (81 keV, 125 hours) Biologic half life- 30 seconds

Xe-133 (lung ventilation scan): lung

Question 14

Tc-99?

Answer 14

Enegry: 140

1/2 life- 6 hours

Question 15

Critical Organ in HIDA?

Answer 15

Gallbladder wall

Normal uptake- Liver, GB, bowel

Question 16

DMSA CO?

Answer 16

Kindey

Question 17

DTPA CO?

Answer 17

Bladder

If ingested for gastric emptying- colon

Question 18

HMPAO and ECD critical organ?

Answer 18

Kidneys

Question 19

RBC critical organ?

Answer 19

Heart

Question 20

MAG3 CO?

MAA CO?

Answer 20

MAG3: Bladder

MAA: Lungs

Question 21

Pertechnetate CO?

Answer 21

For thyroid, testicular, and meckels- stomach

For cystography- urinary bladder

Question 22

Sestamibi CO?

Answer 22

Gallbladder

Question 23

Sulfur colloid CO?

Answer 23

IV or intradermal- spleen

PO- Colon