High-intensity signals in Alzheimer's disease without cerebrovascular risk factors: a magnetic resonance imaging evaluation

1992 ◽  
Vol 149 (2) ◽  
pp. 248-250 ◽  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Risk Factors ◽  
Alzheimer’S Disease ◽  
Magnetic Resonance ◽  
High Intensity ◽  
Resonance Imaging ◽  
Imaging Evaluation ◽  
Magnetic Resonance Imaging Evaluation ◽  
Cerebrovascular Risk Factors ◽  
Cerebrovascular Risk

Cerebrovascular Risk-Factors of Prevalent and Incident Brain Infarcts in the General Population: The AGES-Reykjavik Study

Stroke ◽  
2021 ◽  
Author(s):  
Sigurdur Sigurdsson ◽  
Thor Aspelund ◽  
Olafur Kjartansson ◽  
Elias Gudmundsson ◽  
Palmi V. Jonsson ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Risk Factors ◽  
Blood Pressure ◽  
Magnetic Resonance ◽  
Disease Risk ◽  
Resonance Imaging ◽  
Carotid Plaques ◽  
Brain Infarcts ◽  
Cerebrovascular Risk Factors ◽  
Cerebrovascular Risk

Background and Purpose: Studies on the association of cerebrovascular risk factors to magnetic resonance imaging detected brain infarcts have been inconsistent, partly reflecting limits of assessment to infarcts anywhere in the brain, as opposed to specific brain regions. We hypothesized that risk-factors may differ depending on where the infarct is located in subcortical-, cortical-, and cerebellar regions. Methods: Participants (n=2662, mean age 74.6±4.8) from the longitudinal population-based AGES (Age, Gene/Environment Susceptibility)-Reykjavik Study underwent brain magnetic resonance imaging at baseline and on average 5.2 years later. We assessed the number and location of brain infarcts (prevalent versus incident). We estimated the risk-ratios of prevalent (PRR) and incident (IRR) infarcts by baseline cerebrovascular risk-factors using Poisson regression. Results: Thirty-one percent of the study participants had prevalent brain infarcts and 21% developed new infarcts over 5 years. Prevalent subcortical infarcts were associated with hypertension (PRR, 2.7 [95% CI, 1.1–6.8]), systolic blood pressure (PRR, 1.2 [95% CI, 1.1–1.4]), and diabetes (PRR, 2.8 [95% CI, 1.9–4.1]); incident subcortical infarcts were associated with systolic (IRR, 1.2 [95% CI, 1.0–1.4]) and diastolic (IRR, 1.3 [95% CI, 1.0–1.6]) blood pressure. Prevalent and incident cortical infarcts were associated with carotid plaques (PRR, 1.8 [95% CI, 1.3–2.5] and IRR, 1.9 [95% CI, 1.3–2.9], respectively), and atrial fibrillation was significantly associated with prevalent cortical infarcts (PRR, 1.8 [95% CI, 1.2–2.7]). Risk-factors for prevalent cerebellar infarcts included hypertension (PRR, 2.45 [95% CI, 1.5–4.0]), carotid plaques (PRR, 1.45 [95% CI, 1.2–1.8]), and migraine with aura (PRR, 1.6 [95% CI, 1.1–2.2]). Incident cerebellar infarcts were only associated with any migraine (IRR, 1.4 [95% CI, 1.0–2.0]). Conclusions: The risk for subcortical infarcts tends to increase with small vessel disease risk-factors such as hypertension and diabetes. Risk for cortical infarcts tends to increase with atherosclerotic/coronary processes and risk for cerebellar infarcts with a more mixed profile of factors. Assessment of risk-factors by location of asymptomatic infarcts found on magnetic resonance imaging may improve the ability to target and optimize preventive therapeutic approaches to prevent stroke.

scholarly journals Magnetic Resonance Imaging Evaluation of Perianal Fistulas

2013 ◽  
Vol 44 (4) ◽  
pp. 747-754 ◽  
Author(s):  
Hoda Salah Darwish ◽  
Hossam Abdelhafiz Zaytoun ◽  
Hanaa Ahmed Kamel ◽  
Sadia Raheez Qamar
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Imaging Evaluation ◽  
Magnetic Resonance Imaging Evaluation ◽  
Perianal Fistulas

Magnetic Resonance Imaging Evaluation of Neonates With Retinal Hemorrhages

PEDIATRICS ◽  
1992 ◽  
Vol 89 (2) ◽  
pp. 332-333
Author(s):  
WILBUR L. SMITH ◽  
RANDELL C. ALEXANDER ◽  
G. FRANK JUDISCH ◽  
YUTAKA SATO ◽  
SIMON C. S. KAO
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Abusive Head Trauma ◽  
Full Term ◽  
Resonance Imaging ◽  
Retinal Hemorrhages ◽  
Imaging Evaluation ◽  
Term Neonates ◽  
Magnetic Resonance Imaging Evaluation ◽  
A Prospective Study

Retinal hemorrhages occur frequently in association with abusive head trauma.1 The injuries are venous [See table in the PDF] in origin and, as such, are similar to the retinal hemorrhages which frequently occur in full-term neonates after vaginal delivery. Because retinal hemorrhages in child abuse frequently are associated with intracranial bleeding, we questioned the possibility of a relationship between parturitional retinal hemorrhages and concurrent intracranial injuries. To answer this question we designed a prospective study in which we performed magnetic resonance imaging on 10 randomly selected full-term neonates in whom the presence of retinal hemorrhages was confirmed on fundascopic examination by a pediatric ophthalmologist.

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