Assessment of micro-dose biplanar radiography in lower limb measurements in children View Full Text


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Article Info

DATE

2018-04

AUTHORS

Héloïse Lerisson, Élisa Amzallag-Bellenger, Aurélie Cebulski-Delebarre, Eric Nectoux, Geoffrey Desmulliez, Alain Duhamel, Elodie Drumez, Bernard Herbaux, Nathalie Boutry

ABSTRACT

OBJECTIVES: To evaluate in children microdose protocol compared with low dose for lower limb alignment (LLA) measurements on biplanar radiography. METHODS: Children 6 years or older were included. Height, weight and hip width were measured prior to imaging. Hip width allowed classifying children into morphotype M1 (width <25 cm), M2 (25-35 cm) or M3 (>35 cm) corresponding to predefined acquisition parameters (kV, mA, tube speed). Micro- and low-dose protocols were used alternately, with simultaneous acquisition of frontal and lateral radiographs. LLA measurements were performed by two independent observers (n = 526). In 15 children per morphotype, a third observer performed measurements twice (n = 180). Intraclass correlation coefficients and the dose (delivered, absorbed) were calculated. RESULTS: 100 girls and 160 boys (mean age = 11.7 years) were investigated: 74 M1 (mean BMI, 15.7kg/m2), 149 M2 (19.8 kg/m2) and 40 M3 (30.2 kg/m2). With microdose, inter- and intra-observer agreement was >0.90 for lengths whatever the morphotype, 0.75-0.90 (M1) and >0.90 (M2, M3) for valgus/varus and flexion/hyperextension deviations. Dose reduction reached a factor of 8.5 and 5.4 for the delivered and absorbed dose respectively. CONCLUSIONS: Microdose could be used for LLA measurements in children and permits a significant dose reduction. KEY POINTS: • Lower limb lengths of children can be evaluated with microdose biplanar radiography. • Valgus/varus deviations also can be evaluated with microdose biplanar radiography. • Microdose biplanar radiography significantly reduces delivered and absorbed dose in children. More... »

PAGES

1-10

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    http://scigraph.springernature.com/pub.10.1007/s00330-017-5144-x

    DOI

    http://dx.doi.org/10.1007/s00330-017-5144-x

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1092851161

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/29164381


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        "description": "OBJECTIVES: To evaluate in children microdose protocol compared with low dose for lower limb alignment (LLA) measurements on biplanar radiography.\nMETHODS: Children 6 years or older were included. Height, weight and hip width were measured prior to imaging. Hip width allowed classifying children into morphotype M1 (width <25 cm), M2 (25-35 cm) or M3 (>35 cm) corresponding to predefined acquisition parameters (kV, mA, tube speed). Micro- and low-dose protocols were used alternately, with simultaneous acquisition of frontal and lateral radiographs. LLA measurements were performed by two independent observers (n = 526). In 15 children per morphotype, a third observer performed measurements twice (n = 180). Intraclass correlation coefficients and the dose (delivered, absorbed) were calculated.\nRESULTS: 100 girls and 160 boys (mean age = 11.7 years) were investigated: 74 M1 (mean BMI, 15.7kg/m2), 149 M2 (19.8 kg/m2) and 40 M3 (30.2 kg/m2). With microdose, inter- and intra-observer agreement was >0.90 for lengths whatever the morphotype, 0.75-0.90 (M1) and >0.90 (M2, M3) for valgus/varus and flexion/hyperextension deviations. Dose reduction reached a factor of 8.5 and 5.4 for the delivered and absorbed dose respectively.\nCONCLUSIONS: Microdose could be used for LLA measurements in children and permits a significant dose reduction.\nKEY POINTS: \u2022 Lower limb lengths of children can be evaluated with microdose biplanar radiography. \u2022 Valgus/varus deviations also can be evaluated with microdose biplanar radiography. \u2022 Microdose biplanar radiography significantly reduces delivered and absorbed dose in children.", 
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