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    T2 -weighted, Midglobe. This image demonstrates why T2-weighted images of the orbit are not frequently used in clinical practice. Without the bright signal produced by the orbital fat in Tl-weighted images, it becomes more difficult to differentiate the orbital muscles and vessels. The time required to obtain T2-weighted scans is greater than that required for Tl-weighted scans and is long enough to allow for motion artifact because patients move their eyes during scanning. ES = Ethmoid Sinus, IR = Inferior Rectus Muscle, G = Globe, LP = Levator Palpebrae Superioris, MR = Medial Rectus Muscle, MS = Maxillary Sinus, SoN = Supraorbital Notch, SR = Superior Rectus Muscle.