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HEAD AND NECK BLOCK 2: CT SERIES, X-RAYS AND SCANS 2011 CT of Head LABELING BY GIRI SURA (JCESOM CLASS 2012) SCOUT VIEW FOR ORIENTATION ORBIT NASAL CAVITY PLANE OF SECTION MEDIAL AND LATERAL PTERYGOID PLATES EXTERNAL AUDITORY MEATUS EXTERNAL AUDITORY MEATUS Nasal septum ? Ramus of mandible Styloid process Mastoid process Maxillary sinus Lateral pterigoid plate Lateral pterigoid m Medial pterigoid plate Spinal card Projections that increase surface area called Nasal Conchae = Turbinates Ramus of mandible Styloid process Mastoid air cells Nasal septum Maxillary sinus Lateral pterigoid plate Lateral pterigoid m Medial pterigoid plate Spinal card Coronoid process Neck of mandible Styloid process Mastoid air cells Nasal septum Maxillary sinus Lateral pterigoid plate Lateral pterigoid m Medial pterigoid plate Vertebral a Foraman magnum Spinal card Coronoid process Neck of mandible Mastoid air cells Nasal septum Maxillary sinus Lateral pterigoid plate Lateral pterigoid m Medial pterigoid plate Vertebral a Foraman magnum Spinal cord Pterygopalatine Fossa Neck of mandible Mastoid air cells Nasal septum Maxillary sinus Lateral pterigoid plate Lateral pterigoid m Medial pterigoid plate Vertebral a Foraman magnum LE FORT FRACTURES OF FACE III II I Each of the Le Fort fractures has at least one unique component that is easily recognizable: I, the anterolateral margin of the nasal fossa II, the inferior orbital rim III, the zygomatic arch. Globe Nasal septum Temporalis m Head of mandible Mastoid air cells Temporomadibular joint External auditory meatus Vertebral a Medulla oblangata Trapezius m Nasal septum Temporalis m Mastoid air cells External auditory meatus Cerebellar hemisphere Medulla oblongata Trapezius m Lens Globe Lacrimal gland Temporalis m Mastoid air cells Sigmoid sinus Auditory tube External auditor meatus Cerebellar hemisphere Medulla oblongata Trapezius m Globe Medial Rectus Temporalis m Mastoid air cells Sigmoid sinus Lacrimal gland Auditory tube Basilar a Cerebellar hemisphere Medulla oblangata Trapezius m Globe Medial Rectus Temporalis m Lacrimal gland Auditory tube Basilar a Mastoid air cells Sigmoid sinus Internal occipital protuberance Trapezius m Cerebellar hemisphere Medulla oblangata Frontal sinus Lacrimal gland Crista galli Medial Rectus Temporalis m Temporal lobe Mastoid air cells Sigmoid sinus Internal occipital protuberance Trapezius m Petrous bone Basillar a Cerebellar hemisphere Medulla oblangata Frontal sinus Lacrimal gland Crista galli Optic nerve Temporalis m Temporal lobe Mastoid air cells Sigmoid sinus Internal occipital protuberance Trapezius m Petrous bone Basillar a Cerebellar hemisphere Medulla oblangata Frontal sinus Lacrimal gland Crista galli Optic nerve Temporalis m Temporal lobe Mastoid air cells Sigmoid sinus Internal occipital protuberance Trapezius m Petrous bone Pons Cerebellar hemisphere Optic nerve Temporalis m Temporal lobe Mastoid air cells Sigmoid sinus Internal occipital protuberance Trapezius m Frontal sinus Lacrimal gland Crista galli Nasal septum Petrous bone Pons Cerebellar hemisphere Frontal sinus Crista galli Temporalis m Temporal lobe Mastoid air cells Sigmoid sinus Internal occipital protuberance Trapezius m Sphenoidal sinus Petrous bone Pons Cerebellar hemisphere Frontal sinus Crista galli Temporalis m Temporal lobe Sphenoidal sinus Dorsum sellae Pons Mastoid air cells Sigmoid sinus Internal occipital protuberance Cerebellar hemisphere Frontal sinus Crista galli Temporalis m Temporal lobe Sella tursica Dorsum sellae Pons Mastoid air cells Sigmoid sinus Internal occipital protuberance Cerebellar hemisphere GROSS ANATOMY/RADIOLOGY LIBRARY: http://musom.marshall.edu/anatomy/radiology/ Many links to excellent websites for learning and studying Images 6 Lateral view of skull 1. Ramus of mandible 2. Styloid process of temporal bone PA VIEW OF SKULL Posteroanterior view of skull 1) Nasal septum 2) Mastoid air cells 3) Lambdoid suture (don't confuse with fracture) AP view of skull Anteroposterior film of skull 1. Transverse process of C2 2. Ramus of mandible 3. Odontoid process (dens) of C2 Lateral View of Neck (Note: 2 and 4 are more apparent on original film in lab) 1. Trachea 2. Thyroid cartilage 3. Hyoid bone 4. Epiglottis 5. Body of C2 6. Dens of C2 7. Anterior arch of atlas 8. Posterior arch of atlas 9. Spines of C2 Lateral View of Skull 1. External auditory meatus 2. Mastoid air cells 3. Auricle 4. Calcified pineal body 5. Sella turcica 6. Inner table of skull bone 7. Outer table of skull bone 8. Internal occipital protuberance 9. Sphenoid air sinus 4 CAROTID ANGIOGRAM 1- Common Carotid Artery 2- Superior Thyroid Artery 3- Lingual Artery 4- Facial Artery 5- Occipital Artery 6- Maxillary Artery 7- Superficial Temporal Artery 8- Carotid Siphon CT HORIZONTAL SECTION OF ORBIT 1- Medial Rectus 2- Lens 3- Lateral Rectus 4- Optic Nerve 5- Temporalis muscle 5 CT Horizontal Pterygoid Plate All CT Horizontal Pterygoid Plate Part 1 6- Lateral Pterygoid Muscle 7- Neck of Mandible 8- Coronoid Process of Mandible CT Horizontal Pterygoid Plate Part 2 1- Nasal Septum 2- Maxillary Sinus 3- Medial Pterygoid Plate 4- Lateral Pterygoid Plate CT Horizontal Pterygoid Plate Part 3 5- Ramus of Mandible CT Horizontal Pterygoid Plate (three preceding slides) 1- Nasal Septum 2- Maxillary Sinus 3- Medial Pterygoid Plate 4- Lateral Pterygoid Plate 5- Ramus of Mandible 6- Lateral Pterygoid Muscle 7- Neck of Mandible 8- Coronoid Process of Mandible MRA - Magnetic Resonance Angiography - Blood Supply to Head Vertebral Artery Common Carotid Artery Vertebral Artery Common Carotid Artery Brachiocephalic Trunk Arch of Aorta MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only Vertebral Artery Common Carotid Artery Arch of Aorta Anterior view MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only Rotate to Right MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only Rotate to Right MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only Rotate to Right MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only Rotate to Right MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only Vertebral Artery Common Carotid Artery Arch of Aorta Rotate to Right Left side only High Mag Occipital Artery Maxillary Artery Facial Artery Internal Carotid Artery Bifurcation Vertebral Artery Lingual Artery External Carotid Artery Common Carotid Artery