New Approach for B-Mode Ultrasound (US) Evaluation of the Plantar Aponeurosis (PA) Thickness in Healthy Subjects

Abstract

Purpose To compare ultrasound (US) measurements in the sagittal and axial plane of the plantar aponeurosis (PA) in healthy subjects. Materials and MethodsPA thickness was measured in 40 healthy subjects (mean age: 34 years) by two radiologists using US in sagittal, axial medial and axial lateral planes. Subjects were classified according to gender (female and male) and age (18-35 versus 50-75 years). All measurements were compared and the interobserver agreement was calculated. Results The PA was medially significantly thicker than laterally (mean ± std 3.1±0.7mm versus 2.5±0.5mm respectively, P<0.001). A significant difference was found between males and females (3.3±0.7mm versus 2.9±0.6mm medially and 2.7±0.6mm versus 2.3±0.4mm laterally, p<0.05) and between the older and younger age groups (3.8±0.6mm versus 2.8±0.4mm medially and 3.1±0.4mm versus 2.3±0.4mm laterally, p<0.001). Good interobserver agreement was detected (0.74). Conclusion Measurement of central and lateral fascicles of the plantar aponeurosis in both planes (sagittal and axial) is recommended in the daily routine. Key points US examination of the central and lateral fascicles of the PA was feasible. PA thickness measurements showed significant differences based on age and gender. There was good interobserver correlation between both examiners despite the major difference in experience. Scanning of two planes for the PA is recommended in the daily routine. PA thickness measurement by US is a fast and reliable method for junior radiologists. Citation Format Abd Ellah MM, Kremser C, Strobl S etal. New Approach for B-Mode Ultrasound (US) Evaluation of the Plantar Aponeurosis (PA) Thickness in Healthy Subjects.