MRI: Axial images  
 

These are thin section (2mm) T1-weighted axial MRI images of the orbit. The image on the left is the most inferior. The image on the right and those on the subequent pages are sequentially more superior. On T1 images, fat is high signal intensity (bright), fluid is low signal intensity (dark), and muscles and nerves are gray.

 
 

Identify the following:

1. inferior rectus

2. medial rectus

3. lateral rectus

4. optic nerve

5. eyeball (globe)

6. orbital fat

 

BONUS

1. ethmoid air cells

 

 
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