90Y Bremsstrahlung Imaging for Absorbed-Dose Assessment in High-Dose Radioimmunotherapy.

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title = "90Y Bremsstrahlung Imaging for Absorbed-Dose Assessment in High-Dose Radioimmunotherapy.",
abstract = "This feasibility study demonstrates (90)Y quantitative bremsstrahlung imaging of patients undergoing high-dose myeloablative (90)Y-ibritumomab treatment. METHODS: The study includes pretherapy (111)In SPECT/CT and planar whole-body (WB) imaging at 7 d and therapy (90)Y SPECT/CT at 6 d and (90)Y WB imaging at 1 d. Time-activity curves and organ-absorbed doses derived from (90)Y SPECT images were compared with pretherapy (111)In estimates. Organ activities derived from (90)Y WB images at the first day were compared with corresponding pretherapy estimates. RESULTS: Pretherapy (111)In images from 3 patients were similar to the (90)Y images. Differences between absorbed-dose estimates from pretherapy (111)In and (90)Y therapy were within 25%, except for the lungs. Corresponding activity differences derived from WB images were within 25%. Differences were ascribed to incomplete compensation methods and real differences in pharmacokinetics between pretherapy and therapy. CONCLUSION: Quantitative bremsstrahlung imaging to estimate organ activities and absorbed doses is feasible.",
keywords = "quantification, activity, radioimmunotherapy, imaging, yttrium, bremsstrahlung",
author = "David Minarik and {Sj{\"o}green Gleisner}, Katarina and Ola Lind{\'e}n and Karin Wing{\aa}rdh and Jan Tennvall and Sven-Erik Strand and Michael Ljungberg",
year = "2010",
doi = "10.2967/jnumed.110.079897",
language = "English",
volume = "51",
pages = "1974--1978",
journal = "Journal of Nuclear Medicine",
issn = "0161-5505",
publisher = "Society of Nuclear Medicine",
number = "12",