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[A quantitative study of regional cerebral blood flow in childhood using 123I-IMP-SPECT: with emphasis on age-related
A Kobayashi1, M Ito, H Shiraishi
1Department of Pediatrics, Shimane Medical University.
Insights
Regional cerebral blood flow (rCBF) in children aged 0-19 years was analyzed using single photon emission computed tomography (SPECT). rCBF demonstrated significant age-related changes, varying across different brain regions and developmental stages.
Area of Science:
- Neuroscience
- Radiology
- Pediatrics
Background:
- Understanding regional cerebral blood flow (rCBF) is crucial for assessing brain development and function in pediatric populations.
- Age-related changes in rCBF can indicate normal maturation or potential neurological abnormalities.
Purpose of the Study:
- To quantitatively analyze regional cerebral blood flow (rCBF) in individuals aged 0 to 19 years.
- To investigate the age-related patterns and regional variations of rCBF in developing brains.
Main Methods:
- Utilized single photon emission computed tomography (SPECT) for quantitative rCBF analysis.
- Employed N-isopropyl-p-[123I] iodoamphetamine (123I-IMP) as the radiotracer.
- Studied a cohort of 26 individuals ranging from infancy to adolescence.
Main Results:
- Observed significant age-related changes in rCBF, with low flow in early infancy, increasing through childhood, and stabilizing after puberty.
- Demonstrated greater variability in rCBF within the cerebral cortex compared to the thalamus and cerebellum, with closer correlation to age.
- Noted specific regional patterns, such as low frontal and high occipital rCBF at 4 months, and higher cortical than thalamic rCBF in older individuals.
- Highlighted significant inter-individual variance in rCBF during childhood.
Conclusions:
- rCBF undergoes dynamic, age-dependent modifications throughout childhood and adolescence.
- Cerebral cortex rCBF patterns are particularly sensitive to age and developmental stage.
- SPECT imaging with 123I-IMP provides valuable insights into pediatric neurovascular development.
Abstract:
Single photon emission computed tomography (SPECT), using N-isopropyl-p-[123I] iodoamphetamine (123I-IMP) was used for quantitative analysis of regional cerebral blood flow (rCBF) on 26 individuals between 0 and 19 years of age. The rCBF showed age-related changes; it was low in early infancy, increased in late infancy through early childhood, and decreased and remained constant after puberty. The rCBF through cerebral cortex varied more greatly than through thalamus and cerebellum, and seemed to depend more closely on age. In the case of 4 months of age rCBF was very low at the frontal region and was very high at the occipital region. In more older cases, rCBF in the cerebral cortex was higher than in the thalamus. In childhood, rCBF was very inconsistent and showed a great inter-individual variance.