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This study aimed to compare the accuracy of our novel immobilization method using cylinders with that of bite\u2010block type immobilization methods. Three immobilization methods were compared: bite\u2010block only, bite\u2010block combined with torso immobilization, and immobilization using cylinders. Five beagles with canine teeth underwent CT five times for each of the three immobilization methods. One beagle without canine teeth underwent CT 15 times using each method. Three maxillary landmarks (maxillary incisor, frontal sinus, and occipital bone) and one mandibular landmark (mandibular incisor) were established, and the errors in each immobilization method were measured. For all head landmarks, the error in the immobilization method using cylinders was the most reproducible, with the smallest errors. No significant differences were observed in the time required for immobilization. Although there were limitations (such as the use of dogs from a single breed, a single episode of anesthesia, no disassembly of the immobilization system between scans, and the same person performing the positioning on the same day), we found our new reusable immobilization method using cylinders was the most accurate among the three compared methods. This was a proof\u2010of\u2010principle study to evaluate head immobilization using cylinders, and further investigations are needed to confirm its clinical utility.<\/jats:p>","DOI":"10.1111\/vru.13364","type":"journal-article","created":{"date-parts":[[2024,3,30]],"date-time":"2024-03-30T10:33:40Z","timestamp":1711794820000},"page":"323-333","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Comparison of a new immobilization method using a reusable 3\u2010point fixation cylinder system and bite\u2010block type immobilization methods in veterinary radiotherapy"],"prefix":"10.1111","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-2160-8783","authenticated-orcid":false,"given":"Shinichiro","family":"Yoda","sequence":"first","affiliation":[{"name":"Laboratory of Veterinary Radiology, School of Veterinary Medicine Azabu University  Sagamihara Kanagawa 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