0:01

Hi. My name is Dave Yousem,

0:03

and I am a professor of Neuroradiology at the

0:05

Johns Hopkins University School of Medicine.

0:08

If you've been following along with the mastery courses,

0:10

you know that we've previously looked at the external

0:13

ear and the external auditory canal as one course.

0:17

We did a second course on the middle ear anatomy and

0:20

pathology, and we've come to the final temporal bone

0:24

and session, and that is on the inner ear.

0:28

So let's dive right in. With inner ear imaging,

0:32

we have dominated with CT scanning for

0:37

the pathology of the inner ear.

0:39

MRI is usually complementary to CT in identifying

0:44

the membranous labyrinth,

0:46

the nerves themselves, and the various pathology

0:51

associated with the internal auditory canal.

0:53

Now, the internal auditory canal has

0:55

already been addressed by

0:57

Dr. Mukherjee, so we will just be dealing with

0:59

the inner ear proper in this course.

1:02

The techniques that we use are

1:05

high-resolution CT scanning.

1:07

The CT scanning is typically done in the axial plane

1:11

with submillimeter-thin slices that are then

1:15

reconstructed with multiplanar reconstructions

1:18

in the coronal and sagittal planes. That said,

1:22

you can do reconstructions with the 3D dataset in any

1:25

plane, and those are employed in particular when looking

1:29

for superior semicircular canal dehiscence syndrome,

1:34

in which case, we have spiral reconstructions

1:37

around the superior semicircular canal.

Inner Ear – Introduction

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