DMSA Renal

Question 1

RP

Dose

Answer 1

99mTc DMSA

1-5 mCi

Question 2

Indications

Answer 2

Evaluation of renal cortex
Evaluate renal function
Detect and localize a mass
Structural evaluation of lesions – hot or cold spots
Detection of acute or chronic pyelonephritis

Question 3

Contraindications

Answer 3

On ACE inhibitors

On angiotensin II receptor blockers

Question 4

Patient Prep

Answer 4

None

Question 5

Positioning

Answer 5

Patient supine with camera POS

Already injected so use P-scope to position

Question 6

Target Organ
Critical Organ
Method of Localization
Route of Excretion

Answer 6

Target Organ – Kidneys
Critical Organ – Kidney, bladder
Method of Localization – Compartmentalization
Route of Excretion – Urinary

Question 7

Procedure

Answer 7

Position patient and take immediate statics
POS, LPO, RPO
Delayed images at 1 hr, 4-6 hrs and/or 24 hours
SPECT possible at 2 hours
Elliptical 360°, 64 stops for 30 sec stop

Question 8

Computer Set Up

Answer 8

LEHR
Basic
Statics
500k-1M counts

Question 9

Normal

Answer 9

Both kidneys visualize at the same time
Bilateral smooth uptake
Hepatic uptake

Question 10

Abnormal

Answer 10

Non-visualization of one or both kidneys
Enlarged or decreased activity - pyelonephritis
Asymmetric activity indicative of hydroureteronephritis
Cold spots
Change in renal contour

Question 11

Treatment

Answer 11

Antibiotics