Training Collections
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
Training Collections
Musculoskeletal Imaging
Emergency Imaging
PET Imaging
Pediatric Imaging
4 topics, 10 min.
10 topics, 19 min.
17 topics, 1 hr. 11 min.
Anterior Globe Rupture with Laterally Dislocated Cataract
4 m.Foreign Body in Globe
4 m.Wood Foreign Body and Ocular Hypotony
2 m.Hemmorhage in Both Chambers, Open Globe
3 m.Staphyloma
4 m.Persistent Hyperplastic Primary Vitreous (PHPV)
5 m.Retinal Detachment
3 m.Retinoblastoma on CT
4 m.Retinoblastoma on MRI
9 m.Bilateral Retinoblastoma
7 m.Ocular Pathology - Review
11 m.Endophthalmitis
3 m.PHPV Review, Coloboma, and Staphyloma
5 m.Phthisis Bulbi, Macrophthalmia, and Microphthalmia
4 m.Ocular Calcification
4 m.Retinoblastoma - Review
5 m.Choroidal Melanoma
3 m.15 topics, 1 hr. 8 min.
Intraconal, Conal and Extraconal Anatomy
1 m.Intraconal Hemangioma
5 m.Venous Vascular Malformation
3 m.Optic Nerve Glioma, NF1
4 m.Optic pathway glioma (pilocytic astrocytoma)
4 m.Optic Neuritis, Multiple Sclerosis
6 m.Optic Neuritis, Multiple Sclerosis (2)
7 m.Neuromyelitis Optica Spectrum Disorder
5 m.Neuromyelitis Optica With Spinal Cord Involvement
3 m.Optic Nerve Sheath Meningioma
5 m.Bilateral Optic Neuritis, Leukemia
6 m.Intraconal Pathology - Review
11 m.Optic Neuritis - Review
5 m.Optic Nerve Glioma - Review
4 m.Optic Nerve Sheath Meningioma - Review
6 m.5 topics, 16 min.
18 topics, 55 min.
Extraconal Pathology - Introduction
1 m.Periorbital Cellulitis & Abscess
4 m.Type 3 Orbital Infection
3 m.Solitary Fibrous Tumor
4 m.Langerhans Cell Histiocytosis
2 m.Juvenile Ossifying Fibroma
2 m.Perineural Spread of Squamous Cell Carcinoma
5 m.Proptosis from Extraosseous Extension of Prostate Metastasis
3 m.Orbital Floor Fracture
5 m.Orbital Floor Fracture with Muscle/Fat Herniation
4 m.Orbital Floor Fracture: Status Post Repair
2 m.Bilateral Orbital Fracture Repair
2 m.Periorbital Cellulitis - Review
5 m.Orbital Pseudotumor - Review
3 m.Orbital Wall Abnormalities - Review
3 m.Orbital Fracture - Review
7 m.Giant Cell Reparative Granuloma
3 m.Granulomatous Sinusitis with IgG4-related Ophthalmic Disease
4 m.6 topics, 19 min.
0:01
The extraconal space is seen on
0:03
both sides of the muscle cone.
0:05
Here, medially, we have the extraconal fat and
0:09
adjacent to it we have the ethmoid sinuses,
0:12
which are most closely opposed to the orbit.
0:15
Between the fat and the ethmoid sinus is the periorbita
0:20
or the periosteum of the ethmoid sinus.
0:23
Laterally, you see the extraconal space which is
0:26
bordered by, in this case, the zygomatic arch
0:29
and the zygoma bone.
0:32
And more posterior laterally,
0:34
one might have the sphenoid sinus or the skull base.
0:39
Anteriorly is another extraconal space
0:42
and that includes the eyelids.
0:44
This is also well seen on the coronal images where
0:48
we have the ethmoid sinuses and medial aspect,
0:50
the extraconal fat, and all of the bone that
0:53
surrounds the orbit as well as the maxillary sinus
0:58
below and the frontal sinus and the brain above.
Interactive Transcript
0:01
The extraconal space is seen on
0:03
both sides of the muscle cone.
0:05
Here, medially, we have the extraconal fat and
0:09
adjacent to it we have the ethmoid sinuses,
0:12
which are most closely opposed to the orbit.
0:15
Between the fat and the ethmoid sinus is the periorbita
0:20
or the periosteum of the ethmoid sinus.
0:23
Laterally, you see the extraconal space which is
0:26
bordered by, in this case, the zygomatic arch
0:29
and the zygoma bone.
0:32
And more posterior laterally,
0:34
one might have the sphenoid sinus or the skull base.
0:39
Anteriorly is another extraconal space
0:42
and that includes the eyelids.
0:44
This is also well seen on the coronal images where
0:48
we have the ethmoid sinuses and medial aspect,
0:50
the extraconal fat, and all of the bone that
0:53
surrounds the orbit as well as the maxillary sinus
0:58
below and the frontal sinus and the brain above.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Orbit
Neuroradiology
Neuro
MRI
Head and Neck
CT
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