Effects of Focal Radiation on [
FDG-PET
MRI
stereotactic radiosurgery
Journal
Neuromodulation : journal of the International Neuromodulation Society
ISSN: 1525-1403
Titre abrégé: Neuromodulation
Pays: United States
ID NLM: 9804159
Informations de publication
Date de publication:
Jul 2021
Jul 2021
Historique:
revised:
03
01
2020
received:
10
07
2019
accepted:
26
01
2020
pubmed:
10
4
2020
medline:
19
8
2021
entrez:
10
4
2020
Statut:
ppublish
Résumé
It would be a medically important advance if durable and focal neuromodulation of the brain could be delivered noninvasively and without ablation. This ongoing study seeks to elucidate the effects of precisely delivered ionizing radiation upon focal brain metabolism and the corresponding cellular integrity at that target. We hypothesize that focally delivered ionizing radiation to the brain can yield focal metabolic changes without lesioning the brain in the process. We used stereotactic radiosurgery to deliver doses from 10 Gy to 120 Gy to the left primary motor cortex (M1) of Lee Sung miniature pigs (n = 8). One additional animal served as a nonirradiated control. We used positron emission tomography-computed tomography (PET-CT) to quantify radiation dose-dependent effects by calculating the ratio of standard uptake values (SUV) of 2-deoxy-2-[ We found that the FDG-PET SUV ratio at the targeted M1 was significantly lowered from the pre-radiation baseline measurements for animals receiving 60 Gy or higher, with the effect persisting at nine months after radiosurgery. Only at 120 Gy was a lesion suggesting ablation visible at the M1 target. Animals treated at 60-100 Gy showed a reduced signal in the absence of an identifiable lesion, a result consistent with the occurrence of neuromodulation. Focal, noninvasive, and durable changes in brain activity can be induced without a magnetic resonance imaging (MRI)-visible lesion, a result that may be consistent with the occurrence of neuromodulation. This approach may provide new venues for the investigation of neuromodulatory treatments for disorders involving dysfunctional brain circuits. Postmortem pathological analysis is needed to elucidate whether there have been morphological changes not detected by MRI.
Identifiants
pubmed: 32270579
doi: 10.1111/ner.13147
pii: S1094-7159(21)06187-0
doi:
Substances chimiques
Fluorodeoxyglucose F18
0Z5B2CJX4D
Glucose
IY9XDZ35W2
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
863-869Subventions
Organisme : Zap Medical System Inc.
Organisme : Zap Surgical Systems, Inc.
Informations de copyright
© 2020 International Neuromodulation Society.
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