HEAD AND NECK BLOCK 2: CT SERIES, X-RAYS AND

SCANS2011

CT of Head

LABELING BY GIRI SURA (JCESOM CLASS 2012)

SCOUT VIEW FOR ORIENTATION

ORBIT

NASALCAVITY

PLANE OF SECTION

MEDIAL ANDLATERALPTERYGOIDPLATES

EXTERNALAUDITORYMEATUS

EXTERNALAUDITORYMEATUS

Ramus of mandible

Lateral pterigoid m

Lateral pterigoid plate

Medial pterigoid plate

Maxillary sinus

Nasal septum

Mastoid process Spinal card

Styloid process

?

Projections that increase surface areacalled NasalConchae =Turbinates

Ramus of mandible

Lateral pterigoid m

Lateral pterigoid plate

Medial pterigoid plate

Maxillary sinus

Nasal septum

Mastoid air cells Spinal card

Styloid process

Coronoid process Neck of mandible

Lateral pterigoid m

Lateral pterigoid plate

Medial pterigoid plate

Maxillary sinus

Nasal septum

Mastoid air cellsStyloid process

Spinal card

Foraman magnum

Vertebral a

Coronoid process Neck of mandible

Mastoid air cells

Lateral pterigoid m

Lateral pterigoid plate

Medial pterigoid plate

Maxillary sinus

Nasal septum

Spinal cord

Foraman magnum

Vertebral a

Pterygopalatine FossaNeck of mandible

Lateral pterigoid m

Lateral pterigoid plate

Medial pterigoid plate

Maxillary sinus

Nasal septum

Mastoid air cells

Foraman magnum

Vertebral a

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 rimIII, the zygomatic arch.

LE FORT FRACTURES OF FACE

I

II

III

External auditory meatusMastoid air cells

Medulla oblangata

Nasal septum

Temporalis m

Trapezius m

Head of mandible

Temporo-madibular joint

Globe

Vertebral a

External auditory meatusMastoid air cells

Medulla oblongata

Nasal septum

Temporalis m

Cerebellar hemisphere

Trapezius m

Auditory tube

External auditory meatus

Lacrimal gland

Mastoid air cells

Medulla oblongata

Temporalis m

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Lens

Globe

Auditory tube

Lacrimal gland

Mastoid air cells

Medulla oblangata

Medial Rectus

Temporalis m

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Basilar a

Globe

Auditory tube

Internal occipital protuberance

Lacrimal gland

Mastoid air cells

Medulla oblangata

Medial Rectus

Temporalis m

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Basilar a

Globe

Internal occipital protuberance

Frontal sinus

Lacrimal gland

Mastoid air cells

Medulla oblangata

Petrous bone

Crista galli

Temporalis m Temporal lobe

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Medial Rectus

Basillar a

Internal occipital protuberance

Frontal sinus

Lacrimal gland

Mastoid air cells

Medulla oblangata

Petrous bone

Optic nerve

Crista galli

Temporalis m Temporal lobe

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Basillar a

Internal occipital protuberance

Frontal sinus

Lacrimal gland

PonsMastoid air cells

Petrous bone

Optic nerve

Crista galli

Temporalis m Temporal lobe

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Internal occipital protuberance

Frontal sinus

Lacrimal gland

PonsMastoid air cells

Nasal septum

Petrous bone

Optic nerve

Crista galli

Temporalis m

Temporal lobe

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Crista galli

Internal occipital protuberance

Frontal sinus

PonsMastoid air cells

Petrous bone

Sphenoidal sinusTemporalis m

Temporal lobe

Cerebellar hemisphere

Trapezius m

Sigmoid sinus

Crista galli

Frontal sinus

PonsMastoid air cells

Sphenoidal sinusTemporalis m

Temporal lobe

Cerebellar hemisphere

Sigmoid sinus

Dorsum sellae

Internal occipital protuberance

Crista galli

Frontal sinus

PonsMastoid air cells

Sella tursicaTemporalis m

Temporal lobe

Cerebellar hemisphere

Sigmoid sinus

Dorsum sellae

Internal occipital protuberance

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 mandible2. Styloid process of temporal bone

PA VIEW OFSKULL

Posteroanterior view of skull

1) Nasal septum2) Mastoid air cells3) Lambdoid suture

(don't confuse with fracture)

AP view of skull

Antero-posterior film of skull

1. Transverse process of C22. Ramus of mandible3. Odontoid process (dens) of C2

Lateral View of Neck

(Note: 2 and 4are more apparent onoriginal film in lab)

1. Trachea2. Thyroid cartilage3. Hyoid bone4. Epiglottis5. Body of C26. Dens of C27. Anterior arch of atlas8. Posterior arch of atlas9. Spines of C2

Lateral View of Skull

4

1. External auditory meatus2. Mastoid air cells3. Auricle4. Calcified pineal body5. Sella turcica6. Inner table of skull bone7. Outer table of skull bone8. Internal occipital protuberance9. Sphenoid air sinus

CAROTID ANGIOGRAM

1- Common Carotid Artery2- Superior Thyroid Artery3- Lingual Artery4- Facial Artery5- Occipital Artery6- Maxillary Artery7- Superficial Temporal Artery8- Carotid Siphon

CT HORIZONTAL SECTION OF ORBIT

5

1- Medial Rectus2- Lens3- Lateral Rectus4- Optic Nerve5- Temporalis muscle

CT Horizontal Pterygoid Plate All

CT Horizontal Pterygoid PlatePart 1

6- Lateral Pterygoid Muscle7- Neck of Mandible8- Coronoid Process of Mandible

CT Horizontal Pterygoid PlatePart 2

1- Nasal Septum2- Maxillary Sinus3- Medial Pterygoid Plate4- Lateral Pterygoid Plate

CT Horizontal Pterygoid PlatePart 3

5- Ramus of Mandible

CT Horizontal Pterygoid Plate (three preceding slides)

1- Nasal Septum2- Maxillary Sinus3- Medial Pterygoid Plate4- Lateral Pterygoid Plate5- Ramus of Mandible6- Lateral Pterygoid Muscle7- Neck of Mandible8- Coronoid Process of Mandible

Arch of Aorta

CommonCarotidArtery

BrachiocephalicTrunk

CommonCarotidArtery

VertebralArtery Vertebral

Artery

MRA - Magnetic Resonance Angiography - Blood Supply to Head

MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only

Anteriorview

Arch of Aorta

CommonCarotidArtery

VertebralArtery

RotatetoRight

MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only

RotatetoRight

MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only

RotatetoRight

MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only

RotatetoRight

MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only

RotatetoRight

Arch of Aorta

CommonCarotidArtery

VertebralArtery

MRA - Magnetic Resonance Angiography - Blood Supply to Head - Left side only

Bifurcation

CommonCarotidArtery

VertebralArtery

InternalCarotidArtery

External Carotid Artery

Lingual Artery

Facial Artery

Maxillary ArteryOccipital Artery

Left side onlyHighMag