m-1 radiology head and neck. objectives skull, sinus and orbit anatomy vascular anatomy neck anatomy...
TRANSCRIPT
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M-1
RADIOLOGY Head and Neck
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OBJECTIVES
• Skull, Sinus and Orbit anatomy
• Vascular anatomy
• Neck anatomy
• Clinical cases
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SKULL ANATOMY
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SINUSES PA view
1. Nasal Septum
2. Frontal Sinus
3. Maxillary Sinus
4. Ethmoid Sinus
5. Inferior Turbinate
6. Superior orbital fissure
2
1
4
3
5
6
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1- Superior orbital fissure
2- Inferior orbital foramen
3- Mental foramen
1
2
3
1
2
3
Fissures and foramen havenerves that show on labpracticals.
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OPTIC CANAL
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SINUSES1. Frontal sinus
2. Zygomatic-Frontal Suture
3. Maxillary Sinus
4. Inferior orbital margin
1
3
4
2
AP WATERS VIEW
This view is angled to project the maxillary sinuses free of the petrous ridge.
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Note the opacified right maxillary sinus with fluid layering dependently indicating sinusitis
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• Superior
• Inferior
• Medial
• Lateral
WHAT RECTUS MUSCLE CAN BE INJURED
BY EYE TRAUMA?
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ORBITAL FLOOR FRACTURE
Arrow points to bone fragment displaced into orbit. The inferior
rectus muscle can become entrapped in fracture
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CORONAL SCANCT FACIAL
CT scans redemonstrate fracture and edema at site.
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1. Frontal Sinus
2. Maxillary Sinus
3. Ethmoid Sinus
4. Sphenoid Sinus
1
2
3
4
LATERAL SINUS & SKULL
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Middle meningeal artery
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FRACTUREEPIDURAL
HEMATOMA
Cause: Laceration of the meningeal artery adjacent to
inner table.
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Normal skull
Sella
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CT SKULL BASE
CAROTID CANAL
JUGULAR FORAMEN
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CT SKULL BASE
MANDIBULAR
CONDYLE
MASTOID AIR CELLS
PINNA
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SKULL BASE FRACTURE
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“RACCOON EYES” Periorbital ecchymosis is a sign of a basal skull fracture. Blood tracks along the periosteum and can collect in soft tissues of the orbital lid.
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CT SKULL BASE
ZYGOMATIC ARCH
EXTERNAL
AUDITORY CANAL
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CT SKULL BASE
FORAMEN OVALE
FORAMEN
SPINOSUM
PETROUS CAROTID CANAL
CLIVUS
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CT SKULL BASE
IACINTERNAL AUDITORY CANAL
CAROTID CANAL
OSSICLES
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Acoustic neuroma is a slow growing tumor that develops on the 8th cranial nerve. Symptoms include unilateral loss of hearing, Tinnitus-ringing in ears. dizziness and vertigo.
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SINUS AND ORBIT ANATOMY
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SINUSES
PA view
1. Frontal Sinus
2. Maxillary Sinus
3. Ethmoid Sinus
1
3
2
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SINUSES
1. Frontal sinus
2. Zygomatic-Frontal Suture
3. Maxillary sinus
4. Inferior orbital margin
1
3
4
2
AP WATERS VIEW
This view is angled to project the maxillary sinuses free of the petrous ridge.
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1. Frontal Sinus
2. Maxillary Sinus
3. Ethmoid Sinus
4. Sphenoid Sinus
5. Sella Turcica
1
2
3
4
5
LATERAL SINUS & SKULL
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1
1. Frontal Sinus
CT- SINUSAXIAL VIEW
Scans start superiorly and are shown going inferiorly
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CT SINUSAXIAL SCAN
normal
Note the destroyed posterior wall of the left frontal sinus due to bacterial invasion.
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1. Ethmoid sinus
2. Sphenoid sinus
3. Carotid canal
1
2
3
CT- SINUSAXIAL VIEW
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1. Maxillary sinus
2. Med. & Lat. Pterygoid plate
3. Nasopharynx
4. Nasal septum
5. Inferior turbinate
1
23
4
5
CT- SINUSAXIAL VIEW
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1. Fronto-nasal suture
2. Frontal sinus
3. Nasal bones
1
2
3
CT- SINUSCoronal sections extending from
anterior to posterior
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1. Ethmoid sinus
2. Maxillary sinus
3. Middle turbinate
1
3
CT- SINUSCORONAL VIEW
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CT- SINUSCORONAL VIEW
Maxillary sinus
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1. Sphenoid sinus
2. Hard palette
3. Anterior clinoid
1
CT- SINUSCORONAL VIEW
2
3
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1. Retro orbital fat
2. Medial rectus
3. Lens
4. Lateral rectus
5. Optic nerve5
1 32 4
CT ORBITAXIAL SCAN
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CORONAL SCAN
AXIAL SCAN
MR SCAN
Chiasm
Opticnerves
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In Biblical liturature who showed
a knowledge of cranial nerve
anatomy?
• Moses
• Noah
• David
• Goliath
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Normal
Sella Mass
Compare the normal with the enlarged pituitary adenoma. The mass impinges on the optic chiasm to create the visual disturbance.
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NECK ANATOMY
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LATERAL NECK
1. Hard palate
2. Soft palate
3. Nasopharynx
4. Oropharynx
5. Epiglottis
12
3
4
5
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1
2
3
4
AIRWAY1. Calcified tracheal
cartilage rings
2. Hyoid bone
3. Epiglottis
4. Thyroid cartilage
5. Cricoid cartilage
5
LATERAL VIEW OF NECK
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1
2
3
4
AIRWAY
1. Calcified tracheal cartilage rings
2. Hyoid bone
3. Epiglottis
4. Thyroid cartilage
5. Cricoid cartilage
5
LATERAL VIEW OF NECK
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Where do you insert the tube at an emergency tracheostomy?
Cricothyroid membrane
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LATERAL VIEW OF NECK
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SCAN LEVELMAXILLARY SINUSES
ZYGOMA
ZYGOMA
SPHENOIDSINUS
LT
Sections from the skull base extending inferiorly through the
neck.
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MASTOIDS
NASOPHARYNX
MAXILLA LT
EXTERNALAUDITORYMEATUS
MANDIBULAR CONDYLE
SCAN LEVEL
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SCAN LEVEL
MANDIBLE
PAROTIDGLAND
MASSETER MUSCLE
MASSETER MUSCLE
PTERYGOIDMUSCLES
LT
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SCAN LEVEL
SUBCUTANEOUS FAT
SUBMANDIBULARGLAND
EPIGLOTTIS
STERNOCLEIDOMASTOIDMUSCLE
LT
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SCAN LEVELHYOID BONE
JUGULARVEIN
JUGULARVEIN
COMMON CAROTID ARTERIES
LT
VALLECULA
PYRIFORM SINUS
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SCAN LEVELTHYROID CARTILAGE
VOCAL CORD
STERNOCLEIDOMASTOID
MUSCLE
LT
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SCAN LEVELTHYROID CARTILAGE
CRICOID CARTILAGE
JUGULARVEIN
COMMON CAROTIDARTERY
LT
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SCAN LEVEL
CLAVICLECLAVICLE
THYROID GLAND
FAT FAT
LT
TRACHEA ESOPHAGUS
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SWALLOWING STUDY
1 2
3 4
Note hyoid bone moves anteriorly and superiorly with swallowing.
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THYROID SCAN
Nuclear Medicine
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THYROID SCAN
SAGITTAL
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SAGITTAL SCANS
LEFT LOBE RIGHT LOBE
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NUCLEAR MEDICINE
Normal Hypo-functional
THYROID SCAN
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PATIENT PRESENTS WITH WHEEZING AND NECK MASS IN MIDLINE AT
STERNAL NOTCH
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THYROIDSCAN
Nuclear Medicine
Chest x-ray showing superior Mediastinal mass with displacement of the trachea to the right. Nuclear Medicine I123 thyroid scan shows lobular mass extending inferiorly from the thyroid indicating a thyroid goiter accounting for displacement on chest x-ray.
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CORONAL CT SCANS SHOWS THYROID LESION.
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5
2
3
6
4
ARTERIOGRAM
1. Internal carotid artery
2. Intracranial carotid
3. Maxillary artery
4. Occipital artery
5. External carotid artery
6. Common carotid artery
7. Facial artery
17
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WHAT VESSEL HAS TO BE LIGATED OR EMBOLIZED TO CONTROL EPISTAXIS IF PACKING NOSE FAILS?
• Maxillary
• Facial
• Lingual
• Superficial temporal
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Here injection into the external carotid shows extravasation of blood from a branch of the maxillary artery compared with the normal.
Maxillary artery
normal
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EMBOLIZATION
Radiologist has directed a coil through the catheter to occlude vessels that were bleeding.
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ASYMPTOMATIC BRUIT ON
PHYSICAL EXAM
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Abnormal
Normal
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Normal
Ultrasound and arteriogram show high grade narrowing of internal carotid artery due to atherosclerosis.
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HOARSENESS
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NORMAL
ASPIRATION
A small amount of barium has spilled anteriorly with aspiration into the airway.
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Hiatal hernia and reflux.
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Here two patients with masses in their chest have involvement of the recurrent laryngeal nerve causing hoarseness due to vocal cord paralysis .
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LARGE THORACIC ANEURYSM
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LUNG MALIGNANCY
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Amoebic meningitis can be contracted in southern states from swimming in warm lake water in summer by what
route?
• Ear infection
• Aspiration into airway
• Mosquito bite
• Ethmoid transmission
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