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Diagnostic and Dosimetry Features of [64Cu]CuCl2 in High-Grade Paediatric Infiltrative Gliomas.
- Source :
- Molecular Imaging & Biology; Apr2023, Vol. 25 Issue 2, p391-400, 10p
- Publication Year :
- 2023
-
Abstract
- Purpose of the Report: Paediatric diffuse high-grade gliomas (PDHGG) are rare central nervous system neoplasms lacking effective therapeutic options. Molecular imaging of tumour metabolism might identify novel diagnostic/therapeutic targets. In this study, we evaluated the distribution and the dosimetry aspects of [<superscript>64</superscript>Cu]CuCl<subscript>2</subscript> in PDHGG subjects, as copper is a key element in cellular metabolism whose turnover may be increased in tumour cells. Material and Methods: Paediatric patients with PDHGG were prospectively recruited. [<superscript>64</superscript>Cu]CuCl<subscript>2</subscript> PET/CT was performed 1 h after tracer injection; if the scan was positive, it was repeated 24 and 72 h later. Lesion standardised uptake value (SUV) and target-to-background ratio (TBR) were calculated. Tumour and organ dosimetry were computed using the MIRD algorithm. Each patient underwent an MRI scan, including FLAIR, T2-weighted and post-contrast T1-weighted imaging. Results: Ten patients were enrolled (median age 9, range 6–16 years, 6 females). Diagnoses were diffuse midline gliomas (n = 8, 5 of which with H3K27 alterations) and diffuse hemispheric gliomas (n = 2). Six patients had visible tracer uptake (SUV: 1.0 ± 0.6 TBR: 5 ± 3.1). [<superscript>64</superscript>Cu]CuCl<subscript>2</subscript> accumulation was always concordant with MRI contrast enhancement and was higher in the presence of radiological signs of necrosis. SUV and TBR progressively increased on the 24- and 72-h acquisitions (p < 0.05 and p < 0.01, respectively). The liver and the abdominal organs received the highest non-target dose. Conclusions: [<superscript>64</superscript>Cu]CuCl<subscript>2</subscript> is a well-tolerated radiotracer with reasonably favourable dosimetric properties, showing selective uptake in tumour areas with visible contrast enhancement and necrosis, thus suggesting that blood–brain barrier damage is a pre-requisite for its distribution to the intracranial structures. Moreover, tracer uptake showed an accumulating trend over time. These characteristics could deserve further analysis, to determine whether this radiopharmaceutical might have a possible therapeutic role as well. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15361632
- Volume :
- 25
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Molecular Imaging & Biology
- Publication Type :
- Academic Journal
- Accession number :
- 162358135
- Full Text :
- https://doi.org/10.1007/s11307-022-01769-3