Radioiodine (RAI) treatment (RAIT) is considered the gold standard for treatment of feline hyperthyroidism. This study aimed to assess owners' motivation, concerns and satisfaction with RAIT and health-related quality of life (HRQoL) changes in RAI-treated cats. Two surveys (before and six months post-RAIT) were sent to owners of cats scheduled for RAIT between April 2023 and March 2024. The owners of 78 and 68 cats completed the first and the second surveys, respectively. The main reasons for choosing RAIT were that RAIT was considered the gold standard treatment (n = 27/78; 35%) and difficulties administering antithyroid drugs (n = 18/78; 23%). The primary care veterinarian (n = 50/78; 64%) and the internet (n = 33/78; 42%) were the main information sources about RAIT at the referral clinic. Owners were mostly concerned about the anaesthetic risk and hospitalisation, with the cat missing the owner and vice versa being the main worries. Most owners were satisfied with the outcome and their decision for RAIT. The HRQoL score improved within the first six months after RAIT (p < 0.01), with no difference between euthyroid and hypothyroid cats (p = 0.609). This study emphasises the role of the primary care veterinarian and the internet as primary sources of information regarding RAIT. The findings help to better understand owner concerns, improve owner counselling, and educate primary care veterinarians about RAIT.

Keywords: hyperthyroidism; owner motivation; quality of life; radioiodine treatment.

放射性碘（RAI）治疗（RAIT）被认为是治疗猫甲状腺功能亢进的金标准。本研究旨在评估主人对RAIT的动机、担忧以及接受RAIT后猫的生活质量变化。在2023年4月至2024年3月期间，向计划进行RAIT的猫咪的主人发送了两次调查问卷（首次和治疗后六个月）。共有78名和68名主人完成了第一次和第二次调查。选择RAIT的主要原因认为它是金标准治疗(n = 27/78；35%)和难以给药抗甲状腺药物(n = 18/78；23%)。主要的信息来源是初级保健兽医（n = 50/78；64%）以及互联网（n = 33/78；42%）。主人的主要担忧是麻醉风险和住院期间猫与主人的分离问题。大多数主人对治疗结果和他们的决定表示满意。在RAIT后的前六个月，生活质量评分有所提高(p p = 0.609)。本研究强调了初级保健兽医和互联网作为关于RAIT信息的主要来源的作用。这些发现有助于更好地理解主人的担忧，改善对主人的咨询，并教育初级护理兽医有关RAIT的知识。

关键词： 甲状腺功能亢进；主人动机；生活质量；放射性碘治疗。