Which of the following is not a difference between Fluorescein Angiography(FA) & Indocyanine Green(ICG) angiography
ICG is more sensitive to occult CNVM (Choroidal neovascular membranes) not FA. 1. FLUORESCEIN ANGIOGRAPHY 5 ml of 20 % Fluorescein dye is injected in antecubital vein & serial photographs are taken 2. INDOCYANINE GREEN ANGIOGRAPHY (ICG) New angiography technique to diagnose choroidopathies like occult ARMD, Central Serous Retinopathy(CSR) Polypoidal choroidopathy. Choroidal capillaries are better seen in ICG. In ICG, the optic nerve head is hypo-fluorescent. It is hyperfluorescent on FA. FA ICG
Dyes used
Choroidal capillaries are better seen in ICG
FA is more sensitive for occult CNVM
The wavelength used for viewing is different
Diagnosis and Treatment of Retina