Download - Intro to Head CT
![Page 1: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/1.jpg)
Intro to Head CT
Renee B. Van Stavern, MD
Neurology
![Page 2: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/2.jpg)
Normal head CT
Back
Front
Slice
thickness
Bone
Muscle
Hemorrhage
Contrast
Brain
Grey matter
White matter
Edema
CSF
Fat
Air
Attenuation
![Page 3: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/3.jpg)
CT bone windows
![Page 4: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/4.jpg)
CT Contrast
![Page 5: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/5.jpg)
CT Contrast
Kindergarten Kop – It’s NOT a tuma. B. Mendelson
![Page 6: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/6.jpg)
CT Advantages
Fast
Available
(Relatively) inexpensive
Sensitive for intracranial hemorrhage
![Page 7: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/7.jpg)
CT Limitations
There is radiation
Bone artifact obscures visualization, especially
posterior fossa and spinal cord
Not very sensitive to intraparenchymal lesions or
brain edema
Noncontrast CT misses many abnormalities
Risk of allergic reaction to iodinated contrast media
![Page 8: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/8.jpg)
http://www.radiology.wisc.edu/Med_Students/neuroradiology/NeuroRad/NeuroRad.htm
Cingulate gyrus
Brain Anatomy Review
The anatomic origin of the foot fetish. K. Clark
![Page 9: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/9.jpg)
Major brainstem divisions 1 2 3
4
5
6
![Page 10: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/10.jpg)
Diencephalon
http://www9.biostr.washington.edu/
1 2
3 4 5
![Page 11: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/11.jpg)
http://www9.biostr.washington.edu/
Ventricular system
1 2 3
4
5
6 7 8
![Page 12: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/12.jpg)
http://www9.biostr.washington.edu/
1 2 3 4
5
![Page 13: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/13.jpg)
http://www.radiology.wisc.edu/Med_Students/neuroradiology/NeuroRad/NeuroRad.htm
![Page 14: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/14.jpg)
Normal anatomy
1
2
![Page 15: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/15.jpg)
2
4
3
1
![Page 16: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/16.jpg)
Note Brainstem Orientation!
CT Neuroanatomy Class
WU Neuroscience Tutorial
http://thalamus.wustl.edu/course/
Dorsal
Ventral
Ventral
Dorsal
![Page 17: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/17.jpg)
http://medstat.med.utah.edu/kw/brain_atlas/brsc 1
2
3
4
![Page 18: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/18.jpg)
1
2
3
4
5
6
7
![Page 19: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/19.jpg)
1
2
3
4
5
6
7
![Page 20: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/20.jpg)
http://medstat.med.utah.edu/kw/brain_atlas/brsc/index.htm
1 2 3 4 5
6
7
8 9
![Page 21: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/21.jpg)
1
2
3
4
5
6
7 8
![Page 22: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/22.jpg)
1
2
4
3
Creepy two eyes and a smiling face – C. Sumey
![Page 23: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/23.jpg)
http://medstat.med.utah.edu/kw/brain_atlas/brsc/index.htm
1
2
3
4 5 6
7
8
![Page 24: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/24.jpg)
1
2
3 4
5
6
7
![Page 25: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/25.jpg)
1
2
4
5
3
6
7
8
9
10
![Page 26: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/26.jpg)
1
2
3
A calcified, ciliated, CSF-producing mucosal structure. C. Hou
![Page 27: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/27.jpg)
![Page 28: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/28.jpg)
1
2
3
4
7
5
6
![Page 29: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/29.jpg)
Arteries
![Page 30: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/30.jpg)
1 2 3 4 5 6
7 8 9 10 11
![Page 31: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/31.jpg)
Abnormal head CT
![Page 32: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/32.jpg)
An order for reading scans
Patient, type of scan, indication, level
Quality of scan
Cranial and extracranial structures
(White spaces)
Ventricles, cisterns, and sulci
(Black spaces)
Brain parenchyma
Hemorrhage
Lesions
![Page 33: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/33.jpg)
Describe lesions
Location
Density
Margins
Effects
Associated findings
Temporal progression
Differential diagnosis
![Page 34: Intro to Head CT](https://reader035.vdocuments.us/reader035/viewer/2022062221/55cf8cb35503462b138f03a6/html5/thumbnails/34.jpg)
Increased CT brain
attenuation
Hemorrhage (acute)
Calcium
Contrast
Metal
Decreased CT brain
attenuation
Ischemia
Infection
Neoplasm
Trauma
Edema
Hemorrhage (old)