Breast scintigraphy for medicine students.ppt

Breast scintigraphy for medicine students
Breast scintigraphy for medicine students
Breast scintigraphy for medicine students Breast scintigraphy for medicine students Breast scintigraphy for medicine students Breast scintigraphy for medicine students Breast scintigraphy for medicine students Breast scintigraphy

1. Breast scintigraphy
Indications: palpable lesions? Cannot detect lesions
<1 cm. Dense breasts.
Pre-requesite: sonomammogramwithin 1m, LMP
precautions: PH of biopsy (after 2-4w), PH of RT or
CTH (after 2-4 m).
Tracers: 20-30 mCiIVI (in contralateralarm) of Tc-
99m SestaMIBI ? or TH 201?. In case of bilateral
breast disease, the IVI is done in dorsum of LL.
Patient is supine with arms above head. Low energy
high resolution collimator is used.

2. 1. Dynamic scan over 10 m from time of injof tracer.
Time-activity curves are plotted (lesion/ background
curves). +-Spectviews using 360o rotating cameras.
2. Static views after 10 m and 2 hr, ant post both
laterals.
Normally, uniform symmetrical uptake of tracer with
a physiological increased uptake at nipple( warmer
uptake), axillaryfolds are linear and uniform and
breast/background activity should be < 1.21

4. Lacrimal scintigraphy
Indications: epiphora, post-op study.
Pt sits 10 cm from naisoninfrontof pin-hole
collimator, immobile, a drop of Tc99m
pertechnetate0.25 mCi+ saline in both eyes.
Dynamic images for 3 min at a rate of one
image/3sec.
Static images every 5 m for 20 m.
Advantage: easy, non-invasive and
physiological.

5. ANATOMY