Abstract
Background: Susceptibility-weighted imaging (SWI) microscopy on a 7.0T system demonstrated the corticomedullary junction (CMJ) to be a high-susceptibility region (HSR) in young normal subjects, suggesting that functional alteration of cortical microcirculation could be assessed with this imaging method. Methods: Focused microscopic studies were performed on the parietal association cortex in 74 normal volunteers (ages 20-79 years; 35 female, 39 male) using a SWI algorithm on a system constructed based on General Electric Signa LX (Waukesha, WI, USA), equipped with a 900-mm clear bore superconducting magnet operating at 7.0T. Results: There was a clear-cut reduction in the thickness of the normal-appearing cortex (cortex, R2= .5290, P < .001) and expansion of CMJ-HSR (R2= .6919, P < .001). The sum of cortex thickness and CMJ-HSR thickness was essentially constant, suggesting that the observed expansion of CMR-HSR with aging likely occurred within the cortical mantle. Conclusion: CMJ-HSR expands significantly as a function of aging. Since CMJ-HSR represents a functionally distinct area with relatively slow venous flow, the observed expansion is believed to reflect alteration in cerebral microcirculation with increased age, providing another clue for pathogenesis of Alzheimer's disease.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 379-383 |
| Number of pages | 5 |
| Journal | Journal of Neuroimaging |
| Volume | 22 |
| Issue number | 4 |
| DOIs | |
| State | Published - Oct 2012 |
| Externally published | Yes |
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Keywords
- 7.0T
- Microscopy
- MRI
- SWI
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Clinical Neurology
Cite this
Expansion of corticomedullary junction high-susceptibility region (cmj-hsr) with aging : A clue in the pathogenesis of alzheimer's Disease? / Nakada, Tsutomu; Matsuzawa, Hitoshi; Igarashi, Hironaka; Kwee, Ingrid.
In: Journal of Neuroimaging, Vol. 22, No. 4, 10.2012, p. 379-383.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Expansion of corticomedullary junction high-susceptibility region (cmj-hsr) with aging
T2 - A clue in the pathogenesis of alzheimer's Disease?
AU - Nakada, Tsutomu
AU - Matsuzawa, Hitoshi
AU - Igarashi, Hironaka
AU - Kwee, Ingrid
PY - 2012/10
Y1 - 2012/10
N2 - Background: Susceptibility-weighted imaging (SWI) microscopy on a 7.0T system demonstrated the corticomedullary junction (CMJ) to be a high-susceptibility region (HSR) in young normal subjects, suggesting that functional alteration of cortical microcirculation could be assessed with this imaging method. Methods: Focused microscopic studies were performed on the parietal association cortex in 74 normal volunteers (ages 20-79 years; 35 female, 39 male) using a SWI algorithm on a system constructed based on General Electric Signa LX (Waukesha, WI, USA), equipped with a 900-mm clear bore superconducting magnet operating at 7.0T. Results: There was a clear-cut reduction in the thickness of the normal-appearing cortex (cortex, R2= .5290, P < .001) and expansion of CMJ-HSR (R2= .6919, P < .001). The sum of cortex thickness and CMJ-HSR thickness was essentially constant, suggesting that the observed expansion of CMR-HSR with aging likely occurred within the cortical mantle. Conclusion: CMJ-HSR expands significantly as a function of aging. Since CMJ-HSR represents a functionally distinct area with relatively slow venous flow, the observed expansion is believed to reflect alteration in cerebral microcirculation with increased age, providing another clue for pathogenesis of Alzheimer's disease.
AB - Background: Susceptibility-weighted imaging (SWI) microscopy on a 7.0T system demonstrated the corticomedullary junction (CMJ) to be a high-susceptibility region (HSR) in young normal subjects, suggesting that functional alteration of cortical microcirculation could be assessed with this imaging method. Methods: Focused microscopic studies were performed on the parietal association cortex in 74 normal volunteers (ages 20-79 years; 35 female, 39 male) using a SWI algorithm on a system constructed based on General Electric Signa LX (Waukesha, WI, USA), equipped with a 900-mm clear bore superconducting magnet operating at 7.0T. Results: There was a clear-cut reduction in the thickness of the normal-appearing cortex (cortex, R2= .5290, P < .001) and expansion of CMJ-HSR (R2= .6919, P < .001). The sum of cortex thickness and CMJ-HSR thickness was essentially constant, suggesting that the observed expansion of CMR-HSR with aging likely occurred within the cortical mantle. Conclusion: CMJ-HSR expands significantly as a function of aging. Since CMJ-HSR represents a functionally distinct area with relatively slow venous flow, the observed expansion is believed to reflect alteration in cerebral microcirculation with increased age, providing another clue for pathogenesis of Alzheimer's disease.
KW - 7.0T
KW - Microscopy
KW - MRI
KW - SWI
UR - http://www.scopus.com/inward/record.url?scp=84868198371&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84868198371&partnerID=8YFLogxK
U2 - 10.1111/j.1552-6569.2011.00607.x
DO - 10.1111/j.1552-6569.2011.00607.x
M3 - Article
C2 - 21699603
AN - SCOPUS:84868198371
VL - 22
SP - 379
EP - 383
JO - Journal of Neuroimaging
JF - Journal of Neuroimaging
SN - 1051-2284
IS - 4
ER -