Development of an electronic navigation system for elimination of examiner-dependent factors in the ultrasound screening for developmental dysplasia of the hip in newborns

Alexander Kolb,Reinhard Windhager,Markus Schreiner,Madeleine Willegger,Gregor Rettl,Catharina Chiari,Stephan Heisinger

doi:10.1038/s41598-020-73536-9

Alexander Kolb, Reinhard Windhager + Show 5 more

Open Access

https://doi.org/10.1038/s41598-020-73536-9

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Journal: Scientific Reports	Publication Date: Oct 2, 2020
Citations: 5	License type: open-access

Affiliation: Medical University of Vienna

Abstract

To develop an electronic navigation system to increase reliability and comparability in the ultrasound screening of developmental dysplasia of the hip (DDH). The impact of the navigation system on transducer positioning and on sonographic measurements according to Graf was analyzed. Twenty hips in newborns were examined sonographically using a new navigation system capable of detecting the transducer and pelvis position in order to calculate the relative tilt in the frontal, axial, and sagittal-plane. In each newborn an ultrasound image was obtained conventionally according to Graf and a second image using the sonographic navigation system. Relative roll and pitch angles and sonographic measurements were analyzed using paired T-tests and Levene-tests. Relative tilt angles in the conventional group ranged from − 8.9° to 14.3° (frontal-plane) and − 23.8° to 14.2° (axial-plane). In the navigation-assisted group ranges from − 3.0° to 3.5° and − 2.8° to 4.5° were observed. Variances were significantly lower in the navigation-assisted group (p < 0.001 and p = 0.004 respectively). The navigation system allowed for a significant reduction of relative tilt angles between the transducer and the newborn pelvis, thus supporting an optimal transducer positioning. This is a promising approach to improve reproducibility and reliability in the ultrasound screening for DDH.

Highlights

To develop an electronic navigation system to increase reliability and comparability in the ultrasound screening of developmental dysplasia of the hip (DDH)
The ultrasound screening according to Graf is broadly accepted as the gold standard for the early detection of developmental dysplasia of the hip (DDH) in n ewborns[1,2]
In the conventional group, where sonographic images were obtained without navigation-assistance, relative tilt angles between transducer and pelvis ranged from − 8.9° to 14.3° and from − 23.8° to 14.2°

Summary

Introduction

To develop an electronic navigation system to increase reliability and comparability in the ultrasound screening of developmental dysplasia of the hip (DDH). The navigation system allowed for a significant reduction of relative tilt angles between the transducer and the newborn pelvis, supporting an optimal transducer positioning This is a promising approach to improve reproducibility and reliability in the ultrasound screening for DDH. The ultrasound screening according to Graf is broadly accepted as the gold standard for the early detection of developmental dysplasia of the hip (DDH) in n ewborns[1,2] This method is based on a high degree of standardization of the sonographic examination to ensure reproducibility of the r esults[3,4]. The effect of relative tilt angles between hip joint and transducer has been analyzed using Graf ’s method, which is as a gold standard performed routinely by 2D ultrasound imaging, based on an optoelectronic motion capture s ystem[9].

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