Training Collections
Course Contents
Lesson
Orbital Imaging Protocols
4 topics, 10 min.
Lesson
Orbit Anatomy
10 topics, 19 min.
Lesson
Case Review - Ocular Pathology
17 topics, 1 hr. 11 min.
Anterior Globe Rupture with Laterally Dislocated Cataract
4Â m.Foreign Body in Globe
4Â m.Wood Foreign Body and Ocular Hypotony
2Â m.Hemmorhage in Both Chambers, Open Globe
3Â m.Staphyloma
4Â m.Persistent Hyperplastic Primary Vitreous (PHPV)
5Â m.Retinal Detachment
3Â m.Retinoblastoma on CT
4Â m.Retinoblastoma on MRI
9Â m.Bilateral Retinoblastoma
7Â m.Ocular Pathology - Review
11Â m.Endophthalmitis
3Â m.PHPV Review, Coloboma, and Staphyloma
5Â m.Phthisis Bulbi, Macrophthalmia, and Microphthalmia
4Â m.Ocular Calcification
4Â m.Retinoblastoma - Review
5Â m.Choroidal Melanoma
3Â m.Lesson
Case Review - Intraconal Pathology
15 topics, 1 hr. 8 min.
Intraconal, Conal and Extraconal Anatomy
1Â m.Intraconal Hemangioma
5Â m.Venous Vascular Malformation
3Â m.Optic Nerve Glioma, NF1
4Â m.Optic pathway glioma (pilocytic astrocytoma)
4Â m.Optic Neuritis, Multiple Sclerosis
6Â m.Optic Neuritis, Multiple Sclerosis (2)
7Â m.Neuromyelitis Optica Spectrum Disorder
5Â m.Neuromyelitis Optica With Spinal Cord Involvement
3Â m.Optic Nerve Sheath Meningioma
5Â m.Bilateral Optic Neuritis, Leukemia
6Â m.Intraconal Pathology - Review
11Â m.Optic Neuritis - Review
5Â m.Optic Nerve Glioma - Review
4Â m.Optic Nerve Sheath Meningioma - Review
6Â m.Lesson
Case Review - Conal Lesions
5 topics, 16 min.
Lesson
Case Review - Extraconal Injuries and Abnormalities
18 topics, 55 min.
Extraconal Pathology - Introduction
1Â m.Periorbital Cellulitis & Abscess
4Â m.Type 3 Orbital Infection
3Â m.Solitary Fibrous Tumor
4Â m.Langerhans Cell Histiocytosis
2Â m.Juvenile Ossifying Fibroma
2Â m.Perineural Spread of Squamous Cell Carcinoma
5Â m.Proptosis from Extraosseous Extension of Prostate Metastasis
3Â m.Orbital Floor Fracture
5Â m.Orbital Floor Fracture with Muscle/Fat Herniation
4Â m.Orbital Floor Fracture: Status Post Repair
2Â m.Bilateral Orbital Fracture Repair
2Â m.Periorbital Cellulitis - Review
5Â m.Orbital Pseudotumor - Review
3Â m.Orbital Wall Abnormalities - Review
3Â m.Orbital Fracture - Review
7Â m.Giant Cell Reparative Granuloma
3Â m.Granulomatous Sinusitis with IgG4-related Ophthalmic Disease
4Â m.Lesson
Case Review - Orbital Appendage Pathology
6 topics, 19 min.
0:00
A quick word about artifacts,
0:02
both for CT and MRI.
0:04
On CT, the artifact that causes the most difficulty is dental
0:09
amalgam artifact or dental appliances that can lead to a
0:13
lot of spray artifact interfering with
0:15
the quality of your imaging.
0:17
With MRI, the metal artifact of dental amalgam
0:20
is less of an issue.
0:22
However, you have to be careful to make sure that
0:24
the patient is not wearing eye makeup,
0:26
because much of the eye makeup has in it cobalt and
0:30
that will lead to artifacts obscuring the eyelids.
0:33
Similarly, if patients have tattoos around their eyes,
0:37
you may have issues with artifacts which can be reduced,
0:40
once again, by reducing the TE,
0:42
the time to echo of the MR sequence.
Imaging Artifacts in MRI and CT
HIDEInteractive Transcript
0:00
A quick word about artifacts,
0:02
both for CT and MRI.
0:04
On CT, the artifact that causes the most difficulty is dental
0:09
amalgam artifact or dental appliances that can lead to a
0:13
lot of spray artifact interfering with
0:15
the quality of your imaging.
0:17
With MRI, the metal artifact of dental amalgam
0:20
is less of an issue.
0:22
However, you have to be careful to make sure that
0:24
the patient is not wearing eye makeup,
0:26
because much of the eye makeup has in it cobalt and
0:30
that will lead to artifacts obscuring the eyelids.
0:33
Similarly, if patients have tattoos around their eyes,
0:37
you may have issues with artifacts which can be reduced,
0:40
once again, by reducing the TE,
0:42
the time to echo of the MR sequence.
Report
Description
Faculty
David M Yousem, MD, MBA
Professor of Radiology, Vice Chairman and Associate Dean
Johns Hopkins University
Tags
Physics and Basic Science
Orbit
Neuroradiology
Neuro
MRI
Head and Neck
CT
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