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The phase I clinical trial demonstrated the successful application of microbubble-assisted MR-guided Focused Ultrasound for blood-brain barrier (BBB) opening in the putamen to facilitate biweekly therapeutic drug delivery in patients with Parkinson's disease. BBB permeability within the targeted putamen was elevated successfully in all treatments, as revealed by Gd-enhanced T1-weighted MRI immediately post treatment. No contrast enhancement was observed in the treated putamen on MR imaging scans acquired one day following each treatment session, indicating closure of the BBB. FDG-PET revealed a reduction of glucose metabolism of the treated putamen relative to the contralateral putamen in all patients.
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Huang et al. (2024) studied this question.
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