M. Suárez-Piñera , L. Rodriguez-Bel , M. Alemany , A. Pons-Escoda , M. Pudis , A. Coello , G. Reynes , N. Vidal , M. Cortes-Romera , M. Macia
{"title":"对疑似肿瘤复发与放射性坏死的脑肿瘤患者进行 6-[18F]FDOPA PET/CT 的可视化和半定量分析","authors":"M. Suárez-Piñera , L. Rodriguez-Bel , M. Alemany , A. Pons-Escoda , M. Pudis , A. Coello , G. Reynes , N. Vidal , M. Cortes-Romera , M. Macia","doi":"10.1016/j.remn.2023.08.004","DOIUrl":null,"url":null,"abstract":"<div><h3>Introduction</h3><p>Amino acid PET is a tool recommended by the main neuroimaging societies in the differential diagnosis between radionecrosis (RNC) and tumour recurrence (TR) in brain tumours, but its use in our country is still limited. The aim of this work is to present our experience with 6-[<sup>18</sup>F]FDOPA PET/CT (FDOPA) in brain tumours (primary and M1), comparing these results with other published results.</p></div><div><h3>Material and methods</h3><p>Retrospective study of 62 patients with suspected tumour recurrence (TR): 42 brain metastases (M1) and 20 primary, who underwent FDOPA. Images were analysed visually and semi-quantitatively, obtaining SUV<sub>max</sub> and SUV<sub>max</sub>lesion/SUV<sub>max</sub>striatum (L/S) and SUV<sub>max</sub>lesion/SUV<sub>max</sub>cortex (L/C) ratios. The diagnostic validity of PET was analysed and the best performing cut-off points were calculated. PET results were compared with clinical-radiological follow-up and/or histopathology.</p></div><div><h3>Results</h3><p>TR was identified in 49% of M1 and 76% of brain primaries. The best performing FDOPA interpretation was visual and semi-quantitative, with a sensitivity and specificity in primaries of 94% and 80% and in M1s of 96% and 72% respectively. The cut-off points with the best diagnostic performance were L/C1.44 in M1 and L/C1.55 in primaries. There are discrepant results with other published results.</p></div><div><h3>Conclusion</h3><p>FDOPA PET/CT is a useful tool in the differential diagnosis between recurrence and RNC in brain tumours. It is needed a standardization to contribute to homogenise FDOPA results a inter-centre level.</p></div>","PeriodicalId":48986,"journal":{"name":"Revista Espanola De Medicina Nuclear E Imagen Molecular","volume":"43 1","pages":"Pages 6-13"},"PeriodicalIF":1.6000,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Análisis visual y semicuantitativo del 6-[18F]FDOPA PET/TC en pacientes con tumores cerebrales ante la sospecha de recurrencia tumoral versus radionecrosis\",\"authors\":\"M. Suárez-Piñera , L. Rodriguez-Bel , M. Alemany , A. Pons-Escoda , M. Pudis , A. Coello , G. Reynes , N. Vidal , M. Cortes-Romera , M. Macia\",\"doi\":\"10.1016/j.remn.2023.08.004\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Introduction</h3><p>Amino acid PET is a tool recommended by the main neuroimaging societies in the differential diagnosis between radionecrosis (RNC) and tumour recurrence (TR) in brain tumours, but its use in our country is still limited. The aim of this work is to present our experience with 6-[<sup>18</sup>F]FDOPA PET/CT (FDOPA) in brain tumours (primary and M1), comparing these results with other published results.</p></div><div><h3>Material and methods</h3><p>Retrospective study of 62 patients with suspected tumour recurrence (TR): 42 brain metastases (M1) and 20 primary, who underwent FDOPA. Images were analysed visually and semi-quantitatively, obtaining SUV<sub>max</sub> and SUV<sub>max</sub>lesion/SUV<sub>max</sub>striatum (L/S) and SUV<sub>max</sub>lesion/SUV<sub>max</sub>cortex (L/C) ratios. The diagnostic validity of PET was analysed and the best performing cut-off points were calculated. PET results were compared with clinical-radiological follow-up and/or histopathology.</p></div><div><h3>Results</h3><p>TR was identified in 49% of M1 and 76% of brain primaries. The best performing FDOPA interpretation was visual and semi-quantitative, with a sensitivity and specificity in primaries of 94% and 80% and in M1s of 96% and 72% respectively. The cut-off points with the best diagnostic performance were L/C1.44 in M1 and L/C1.55 in primaries. There are discrepant results with other published results.</p></div><div><h3>Conclusion</h3><p>FDOPA PET/CT is a useful tool in the differential diagnosis between recurrence and RNC in brain tumours. 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Análisis visual y semicuantitativo del 6-[18F]FDOPA PET/TC en pacientes con tumores cerebrales ante la sospecha de recurrencia tumoral versus radionecrosis
Introduction
Amino acid PET is a tool recommended by the main neuroimaging societies in the differential diagnosis between radionecrosis (RNC) and tumour recurrence (TR) in brain tumours, but its use in our country is still limited. The aim of this work is to present our experience with 6-[18F]FDOPA PET/CT (FDOPA) in brain tumours (primary and M1), comparing these results with other published results.
Material and methods
Retrospective study of 62 patients with suspected tumour recurrence (TR): 42 brain metastases (M1) and 20 primary, who underwent FDOPA. Images were analysed visually and semi-quantitatively, obtaining SUVmax and SUVmaxlesion/SUVmaxstriatum (L/S) and SUVmaxlesion/SUVmaxcortex (L/C) ratios. The diagnostic validity of PET was analysed and the best performing cut-off points were calculated. PET results were compared with clinical-radiological follow-up and/or histopathology.
Results
TR was identified in 49% of M1 and 76% of brain primaries. The best performing FDOPA interpretation was visual and semi-quantitative, with a sensitivity and specificity in primaries of 94% and 80% and in M1s of 96% and 72% respectively. The cut-off points with the best diagnostic performance were L/C1.44 in M1 and L/C1.55 in primaries. There are discrepant results with other published results.
Conclusion
FDOPA PET/CT is a useful tool in the differential diagnosis between recurrence and RNC in brain tumours. It is needed a standardization to contribute to homogenise FDOPA results a inter-centre level.
期刊介绍：
The Revista Española de Medicina Nuclear e Imagen Molecular (Spanish Journal of Nuclear Medicine and Molecular Imaging), was founded in 1982, and is the official journal of the Spanish Society of Nuclear Medicine and Molecular Imaging, which has more than 700 members.
The Journal, which publishes 6 regular issues per year, has the promotion of research and continuing education in all fields of Nuclear Medicine as its main aim. For this, its principal sections are Originals, Clinical Notes, Images of Interest, and Special Collaboration articles.
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