Difference between revisions of "CT in dementia"
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Evaluation encompasses the absence of presence of the following:<ref name=GraingerAllison>Unless else noted in the list, reference is: {{cite book|title=Grainger & Allison's Diagnostic Radiology|author=Andy Adam, Adrian K. Dixon, Jonathan H Gillard, Cornelia Schaefer-Prokop, Ronald G. Grainger, David J. Allison|edition=6, revised|publisher=Elsevier Health Sciences|year=2014|isbn=9780702061288}}</ref> | Evaluation encompasses the absence of presence of the following:<ref name=GraingerAllison>Unless else noted in the list, reference is: {{cite book|title=Grainger & Allison's Diagnostic Radiology|author=Andy Adam, Adrian K. Dixon, Jonathan H Gillard, Cornelia Schaefer-Prokop, Ronald G. Grainger, David J. Allison|edition=6, revised|publisher=Elsevier Health Sciences|year=2014|isbn=9780702061288}}</ref> | ||
*'''Masses''' | *'''Masses''' | ||
| − | [[File:CT of Evan's index.jpg|thumb|180px]] | + | [[File:CT of Evan's index.jpg|thumb|180px|Evan's index]] |
*'''Hydrocephalus''': Evan's index is the ratio of maximum width of the frontal horns to the maximum width of the inner table of the cranium. An Evan's index more than 0.31 indicates hydrocephalus.<ref name="IshiiKawamata2010">{{cite journal|last1=Ishii|first1=Mitsuaki|last2=Kawamata|first2=Toshio|last3=Akiguchi|first3=Ichiro|last4=Yagi|first4=Hideo|last5=Watanabe|first5=Yuko|last6=Watanabe|first6=Toshiyuki|last7=Mashimo|first7=Hideaki|title=Parkinsonian Symptomatology May Correlate with CT Findings before and after Shunting in Idiopathic Normal Pressure Hydrocephalus|journal=Parkinson's Disease|volume=2010|year=2010|pages=1–7|issn=2042-0080|doi=10.4061/2010/201089}}</ref> | *'''Hydrocephalus''': Evan's index is the ratio of maximum width of the frontal horns to the maximum width of the inner table of the cranium. An Evan's index more than 0.31 indicates hydrocephalus.<ref name="IshiiKawamata2010">{{cite journal|last1=Ishii|first1=Mitsuaki|last2=Kawamata|first2=Toshio|last3=Akiguchi|first3=Ichiro|last4=Yagi|first4=Hideo|last5=Watanabe|first5=Yuko|last6=Watanabe|first6=Toshiyuki|last7=Mashimo|first7=Hideaki|title=Parkinsonian Symptomatology May Correlate with CT Findings before and after Shunting in Idiopathic Normal Pressure Hydrocephalus|journal=Parkinson's Disease|volume=2010|year=2010|pages=1–7|issn=2042-0080|doi=10.4061/2010/201089}}</ref> | ||
*'''Vascular disease''': Territorial infarcts, lacunar strokes, as well as lesions in thalamus or white matter | *'''Vascular disease''': Territorial infarcts, lacunar strokes, as well as lesions in thalamus or white matter | ||
Revision as of 12:35, 24 January 2019
Author:
Mikael Häggström [notes 1]
Contents
Evaluation
Evaluation encompasses the absence of presence of the following:[1]
- Masses
File:CT of Evan's index.jpg
Evan's index
- Hydrocephalus: Evan's index is the ratio of maximum width of the frontal horns to the maximum width of the inner table of the cranium. An Evan's index more than 0.31 indicates hydrocephalus.[2]
- Vascular disease: Territorial infarcts, lacunar strokes, as well as lesions in thalamus or white matter
Lacunar stroke
- Periventricular white matter lesions (annotated).jpg
Periventricular white matter lesions
- Atrophy, at least for the frontal and temporal lobe
File:CT of medial temporal lobe (MTA), posterior atrophy (PA) and frontal cortical atrophy (fGCA).png
Atrophy (seen as decreased size of gyri and secondary increased size of sulci) by different grading systems:[3]
- Medial temporal lobe atrophy (MTA)
- Posterior atrophy (PA)
- Frontal cortical atrophy (fGCA)
- Medial temporal lobe atrophy (MTA)
- Posterior atrophy (PA)
- Frontal cortical atrophy (fGCA)
Reporting
If normal, the report should negate masses, hydrocephalus or signs of vascular disease.
The regions of any atrophy should be specified, but generally do not need to be specified more than mild, moderate or severe, since the important measurements of dementia are clinical and functional.
- See also: General notes on reporting
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ Unless else noted in the list, reference is: Andy Adam, Adrian K. Dixon, Jonathan H Gillard, Cornelia Schaefer-Prokop, Ronald G. Grainger, David J. Allison (2014). Grainger & Allison's Diagnostic Radiology (6, revised ed.). Elsevier Health Sciences. ISBN 9780702061288.
- ↑ Ishii, Mitsuaki; Kawamata, Toshio; Akiguchi, Ichiro; Yagi, Hideo; Watanabe, Yuko; Watanabe, Toshiyuki; Mashimo, Hideaki (2010). "Parkinsonian Symptomatology May Correlate with CT Findings before and after Shunting in Idiopathic Normal Pressure Hydrocephalus ". Parkinson's Disease 2010: 1–7. doi:. ISSN 2042-0080.
- ↑ Velickaite, V.; Giedraitis, V.; Ström, K.; Alafuzoff, I.; Zetterberg, H.; Lannfelt, L.; Kilander, L.; Larsson, E-M.; et al. (2017). "Cognitive function in very old men does not correlate to biomarkers of Alzheimer’s disease ". BMC Geriatrics 17 (1). doi:. ISSN 1471-2318. Creative Commons Attribution 4.0 International License
,_posterior_atrophy_(PA)_and_frontal_cortical_atrophy_(fGCA).png){kind=link}