Ct anatomy of orbit

CT ANATOMY OF ORBIT WITH CORONAL SECTIONS

1. MAAJID MOHI UD DIN MALIK LECTURER COPMS ADESH UNIVERSITY BATHINDA,PUNJAB [email protected] CT ANATOMY OF ORBIT [email protected]

2. INTRODUCTION By definition, the orbit (bony orbit or orbital cavity) is a skeletal cavity comprised of seven bones situated within the skull. The cavity surrounds and provides mechanical protection for the eye and soft tissue structures related to it. [email protected]

3. CONTINUE The bones that make up the orbit contain several foramina and fissures through which important neurovascular structures (such as the optic nerve (CN II)) pass through on their way from the brain to the eye and face and vice versa. [email protected]

4. BONES Maxilla Frontal bone Zygomatic bone Ethmoid bone Lacrimal bone Sphenoid bone Palatine bone NOTE: Mnemonic :   Many Friendly Zebras Enjoy Lazy Summer Picnic [email protected]

5. WALLS Roof (superior):   Orbital part of the frontal bone, lesser wing of the sphenoid bone Medial :   Orbital plate of the ethmoid bone, lacrimal bone, frontal process of the maxilla, greater wing of the sphenoid bone Floor (inferior):   Orbital surface of the maxilla, zygomatic bone, palatine bone Lateral :  Z ygomatic bone, sphenoid bone [email protected]

6. LANDMARKS AND OPENINGS Optic foramen (canal), Lacrimal fossa Lacrimal groove Anterior and posterior ethmoidal foramina Trochlea Superior and inferior orbital fissures [email protected]

7. CONTENT OF THE ORBIT Eyeballs Orbital fascia Orbital fat Extraocular muscles Neurovasculature Lacrimal apparatus [email protected]

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11. CT ANATOMY OF ORBIT AXIAL SECTIONS [email protected]

12. 1. GREATER WING OF SPHENOID 2. ZYGOMATIC BONE  3. FRONTAL BONE . [email protected]

13. 1, OPTIC CANAL 2, GREATER WING OF SPHENOID 3, ZYGOMATIC BONE 4, FRONTAL BONE. [email protected]

14. 1 ,  SELLA TURCICA. 2, SUPERIOR ORBITAL FISSURE. 3, GREATER WING OF SPHENOID. 4, ZYGOMATIC BONE. 5, LAMINA OF THE ETHMOID BONE. 6, ETHMOIDAL CELLS. [email protected]

15. 1, SUPERIOR ORBITAL FISSURE. 2, OPTIC NERVE. 3, MEDIAL RECTUS MUSCLE. 4, LAMINA OF THE ETHMOID BONE . [email protected]

16. 1, SUPERIOR ORBITAL FISSURE. 2, ZYGOMATIC BONE. 3, GLOBE. 4, GREATER WING OF SPHENOID. 5, DORSUM SELLAE. [email protected]

17. 1, SPHENOID BONE. 2, SUPERIOR ORBITAL FISSURE. 3, SPHENOTEMPORAL SUTURE. 4, SPHENOZYGOMATIC SUTURE. 5, LAMINA PAPYRACEA OF THE ETHMOID BONE. 6, SPHENOIDAL SINUS [email protected]

18. 1, SPHENOID BONE. 2, LACRIMAL BONE. 3, NASAL BONE. 4, SUPERIOR ORBITAL FISSURE. [email protected]

19. 1, SPHENOIDAL SINUS. 2, ETHMOIDAL CELLS. 3, CAROTID CANAL. [email protected]

20. 1, FORAMEN ROTUNDEM. 2, ZYGOMATIC BONE. 3, MAXILLARY BONE. 4, NASAL BONE. 5, INFERIOR ORBITAL FISSURE. 6, SPHENOIDAL SINUS. [email protected]

21. CT ANATOMY OF ORBIT CORONAL SECTIONS [email protected]

22. 1, NASOLACRIMAL DUCT. 2, GLOBE. 3, FRONTAL SINUS. 4, FRONTAL BONE. 5, ZYGOMATIC BONE. [email protected]

23. 1, NASOLACRIMAL DUCT. 2, GLOBE. 3, FRONTAL SINUS. 4, LAMINA OF THE ETHMOID BONE. 5, INFRAORBITAL CANAL. [email protected]

24. 1, MAXILLARY SINUS. 2, LAMINA OF THE ETHMOID BONE. 3, CRISTA GALLI. 4, FRONTAL BONE AND SINUS. 5, ZYGOMATIC BONE. [email protected]

25. 1,  MAXILLARY BONE AND SINUS. 2, LAMINA PAPYRACEA OF THE ETHMOID BONE. 3, CRIBRIFORM PLATE (ETHMOID). 4, FRONTAL BONE AND SINUS. 5, ZYGOMATIC BONE. 6, INFERIOR NASAL CONCHA. [email protected]

26. 1, MAXILLARY SINUS. 2, MAXILLARY BONE. 3, ZYGOMATIC BONE. 4, FRONTAL BONE. 5, LAMINA PAPYRACEA OF THE ETHMOID BONE. 6, ZYGOMATIC ARCH. [email protected]

27. 1, ZYGOMATIC ARCH. 2, ZYGOMATIC BONE. 3, FRONTAL BONE.4, INFERIOR ORBITAL FISSURE. [email protected]

28. 1, MAXILLARY SINUS. 2, ZYGOMATIC ARCH. 3, INFERIOR ORBITAL FISSURE. 4, ZYGOMATIC BONE. 5, FRONTAL BONE. 6, LAMINA PAPYRACEA OF THE ETHMOID BONE. 7, MAXILLARY BONE. [email protected]

29. 1, MAXILLARY SINUS. 2, ZYGOMATIC ARCH. 3, ZYGOMATIC BONE. 4, FRONTAL BONE. 5, MANDIBLE. [email protected]

30. ANY QUESTIONS? THANK YOU [email protected]