Liver Spleen Imaging Flashcards
1
Q
RP
Dose
TTI
A
- 5-10 mCi Tc Sulfur Colloid
- Image Immediately - Flow Possible
- Wait 15 minutes for statics
2
Q
Indications
A
- Evaluation of functional liver disease: cirrhosis, hepatitis
- Evaluate size, shape and position of liver/spleen
- Detection of hepatic lesions
- Evaluation of hepatomegaly, splenomegaly, jaundice and liver enzyme abnormalities of uncertain causes
3
Q
Contraindications
A
- Recent iodinated or barium contrast studies.
- Barium in the colon may cause artificial defects
4
Q
Patient Prep
A
- No patient prep required
5
Q
Positioning
A
- Patient supine with FOV over upper abdomen.
- Use xyphoid and costal margin as anatomical markers
6
Q
Target Organ
Critical Organ
Route of excretion
Method of Localization
A
- Target: Liver/Spleen
- Critical: Liver/ Spleen
- Excretion: RES to bowel - not seen during exam
- Localization: Phagocytosis by Kupffer cells
7
Q
Procedure
A
- Flow: Position using point source 1-3 s/f for 1 min
- Blood pool: 1 min or 500K counts
- Statics: Wait 15 min after injection. Patients with liver dysfunction or portal hypertension may have to wait 20-30 min. ANT/POS w/ marker, ANT/POS w/o, LATs.OBLs for 500k-1M counts
- SPECT possible: 360º eliptical, 64-120 stops at 30 sec/stop
8
Q
Acquisition
A
- LEAP or LEHR
- Liver Statics + dynamic for flow
- 128x128
9
Q
Processing
A
- JS: Liver/Spleen - Generic Viewer. AB
- Peg: Liver Planar. LAT labels are backwards. NORM
- Gamma.wustl.edu: Liver Spleen Scintigraphy. NORM
10
Q
Normal
Abnormal
A
- Norm: Even homogenous uptake with liver, spleen
- Norm: Will see some bone marrow
- Norm: Kidney, bladder potential
- AB: visualization of lungs - hepatic disease
- AB: Hot or Cold spots. Hot - focal nodular hyperplasia (benign). Cold - tumors or other lesions
11
Q
Labels
A
- Name
- DOB
- MRN
- Date of exam
- Hospital
- Referring physician
- Dose
- Dose rate
- Frame rate
- Left/ Right
- View ID
- Tech Initials
