We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
MR-based follow-up after brachytherapy and proton beam therapy in uveal melanoma.
- Authors
Tang, Michael C. Y.; Ferreira, Teresa A.; Marinkovic, Marina; Jaarsma-Coes, Myriam G.; Klaassen, Lisa; Vu, T. H. Khanh; Creutzberg, Carien L.; Rodrigues, Myra F.; Horeweg, Nanda; Klaver, Yvonne L. B.; Rasch, Coen R. N.; Luyten, Gre P. M.; Beenakker, Jan-Willem M.
- Abstract
Purpose: MRI is increasingly used in the diagnosis and therapy planning of uveal melanoma (UM). In this prospective cohort study, we assessed the radiological characteristics, in terms of anatomical and functional imaging, of UM after ruthenium-106 plaque brachytherapy or proton beam therapy (PBT) and compared them to conventional ultrasound. Methods: Twenty-six UM patients were evaluated before and 3, 6 and 12 months after brachytherapy (n = 13) or PBT (n = 13). Tumour prominences were compared between ultrasound and MRI. On diffusion-weighted imaging, the apparent diffusion value (ADC), and on perfusion-weighted imaging (PWI), the time-intensity curves (TIC), relative peak intensity and outflow percentages were determined. Values were compared between treatments and with baseline. Results: Pre-treatment prominences were comparable between MRI and ultrasound (mean absolute difference 0.51 mm, p = 0.46), but larger differences were observed post-treatment (e.g. 3 months: 0.9 mm (p = 0.02)). Pre-treatment PWI metrics were comparable between treatment groups. After treatment, brachytherapy patients showed favourable changes on PWI (e.g. 67% outflow reduction at 3 months, p < 0.01). After PBT, significant perfusion changes were observed at a later timepoint (e.g. 38% outflow reduction at 6 months, p = 0.01). No consistent ADC changes were observed after either treatment, e.g. a 0.11 × 10−3mm2/s increase 12 months after treatment (p = 0.15). Conclusion: MR-based follow-up is valuable for PBT-treated patients as favourable perfusion changes, including a reduction in outflow, can be detected before a reduction in size is apparent on ultrasound. For brachytherapy, a follow-up MRI is of less value as already 3 months post-treatment a significant size reduction can be measured on ultrasound.
- Subjects
EYE physiology; OCULAR radiography; EYE anatomy; MELANOMA treatment; PATIENT aftercare; ULTRASONIC imaging; UVEA cancer; MAGNETIC resonance imaging; PRE-tests &; post-tests; COMPARATIVE studies; TREATMENT effectiveness; PROTON therapy; RESEARCH funding; RADIOISOTOPE brachytherapy; LONGITUDINAL method
- Publication
Neuroradiology, 2023, Vol 65, Issue 8, p1271
- ISSN
0028-3940
- Publication type
Article
- DOI
10.1007/s00234-023-03166-1