Assessment of micro-dose biplanar radiography in lower limb measurements in children.
Eur Radiol
; 28(4): 1778-1787, 2018 Apr.
Article
en En
| MEDLINE
| ID: mdl-29164381
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.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Extremidad Inferior
Tipo de estudio:
Diagnostic_studies
/
Observational_studies
Límite:
Child
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Eur Radiol
Asunto de la revista:
RADIOLOGIA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Francia