By Zach London. Goals Identify axial, sagittal, and coronal images Identify the following: –CT head without contrast –CT head with contrast –MRI brain.

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Presentation transcript:

by Zach London

Goals Identify axial, sagittal, and coronal images Identify the following: –CT head without contrast –CT head with contrast –MRI brain Identify the following MRI sequences –T1 –T2 –T2 FLAIR –T1 + contrast –Diffusion Weighted Images

Right Left Nose

Fluid is dark, air is darker Bone is white

Grey matter is light White matter is darker Blood and Calcium are white Fluid is dark, air is darker Bone is white

T1 T2 FLAIR T2 Diffusion T1 + Contrast

CSF if white Grey matter is lighter White matter is darker Most pathology is white or hyperintense

CSF if white Grey matter is lighter White matter is darker Most pathology is white or hyperintense

CSF if black Grey matter is lighter White matter is darker Most pathology is white or hyperintense

CSF if black Grey matter is lighter White matter is darker Most pathology is white or hyperintense

CSF if black Grey matter is darker White matter is lighter

CSF if black Grey matter is darker White matter is lighter Sometimes, pathology can be seen as “black holes”

CSF if black Grey matter is darker White matter is lighter Blood vessels light up

CSF if black Grey matter is darker White matter is lighter Blood vessels light up

Ghostly Ethereal You can’t really see the skull or soft tissues of the head Pathology is white

Ghostly Ethereal You can’t really see the skull or soft tissues of the head Pathology is white

How to Figure it out Fast Big white rim of bone = CT scan.

How to Figure it out Fast If CSF is white, it has to be T2

How to Figure it out Fast If it’s ghostly and ethereal, it has to be Diffusion

How to tell T1 from T1 + Contrast Ahem

How to tell T1 from T2 FLAIR Both have black CSF T1 is smoother T2 is grainier T1 has dark cortex and light white matter T2 has light cortex and dark white matter TR – 500TR – 10,000

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