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VALIDATION OF AN INDEXED RADIOTHERAPY HEAD POSITIONING DEVICE FOR USE IN DOGS AND CATS.
- Source :
-
Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association [Vet Radiol Ultrasound] 2015 Jul-Aug; Vol. 56 (4), pp. 448-55. Date of Electronic Publication: 2015 Apr 02. - Publication Year :
- 2015
-
Abstract
- Setup variability affects the appropriate delivery of radiation and informs the setup margin required to treat radiation patients. Twenty-four veterinary patients with head and neck cancers were enrolled in this prospective, cross-sectional study to determine the accuracy of an indexed board immobilization device for positioning. Couch position values were defined at the first treatment based on setup films. At subsequent treatments, patients were moved to the previously defined couch location, orthogonal films were acquired, table position was modified, and displacement was recorded. The mean systematic displacement, random displacement, overall displacement, and mean displacement values of the three-dimensional (3D) vector were calculated. Three hundred thirty-two pairs of orthogonal setup films were analyzed for displacement in cranial-caudal, lateral, and dorsal-ventral directions. The mean systematic displacements were 0.5, 0.8, and 0.5 mm, respectively. The mean random displacements were 1.0, 1.1, and 0.7 mm, respectively. The overall displacements were 1.1, 1.4, and 0.9 mm, respectively. The mean 3D vector value was 1.6 mm with a standard deviation of 1.2 mm. Ninety-five percent of the vectors were <3.6 mm. These values were compared to data obtained with a previously used immobilization device. A t-test was used to compare the two devices. The 3D vector, random displacement in all directions, and overall displacement in the cranial-caudal and dorsal-ventral directions were significantly smaller than displacements with the previous device. The precision and accuracy of the indexed board device was superior to the historical head and neck device.<br /> (© 2015 American College of Veterinary Radiology.)
- Subjects :
- Animals
Cats
Cross-Sectional Studies
Dogs
Equipment Design
Head and Neck Neoplasms radiotherapy
Imaging, Three-Dimensional veterinary
Immobilization instrumentation
Immobilization statistics & numerical data
Patient Care Planning statistics & numerical data
Patient Positioning instrumentation
Prospective Studies
Radiotherapy Planning, Computer-Assisted veterinary
Tomography, X-Ray Computed veterinary
Cat Diseases radiotherapy
Dog Diseases radiotherapy
Head and Neck Neoplasms veterinary
Immobilization veterinary
Patient Positioning veterinary
Subjects
Details
- Language :
- English
- ISSN :
- 1740-8261
- Volume :
- 56
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association
- Publication Type :
- Academic Journal
- Accession number :
- 25832454
- Full Text :
- https://doi.org/10.1111/vru.12257