Intraobserver and interobserver repeatability of ocular biometric measurements obtained by means of B-mode ultrasonography in dogs.
OBJECTIVE
To assess intra- and interobserver repeatability of ocular biometric measurements obtained by means of high-resolution B-mode ultrasonography in dogs. Animals-6 Beagles without ocular abnormalities.


METHODS
B-mode ultrasonography was performed bilaterally with a 10.5-MHz broadband compact linear array transducer. All measurements were made on 2 different occasions by 2 observers. The Bland-Altman method was used to assess agreement between measurements obtained by the 2 observers and between the 2 sets of measurements obtained by each observer.


RESULTS
Intra- and interobserver repeatability was highest for larger measurements, such as depth of the eye and depth of the anterior chamber. When repeatability was examined, bias was significantly different from 0 for only a few measurements, but the percentage difference between observations was as high as 180% for some measurements.


CONCLUSIONS
Results suggest that most measurements of intraocular distances and structures obtained by means of high-resolution B-mode ultrasonography have acceptable intra- and interobserver repeatability. However, the percentage difference between observations can be high for smaller measurements.
Boroffka
Susanne A E B
SA
Division of Diagnostic Imaging, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 10, 3508 TD Utrecht, The Netherlands.
Voorhout
George
G
Verbruggen
Anne-Marie
AM
Teske
Erik
E
D000818:Animals; D001699:Biometry; D004285:Dogs / Q000033:anatomy & histology*; D005123:Eye / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D005260:Female; D008297:Male; D015588:Observer Variation; D015203:Reproducibility of Results; D014463:Ultrasonography