Computed Radiographic Measurement of Limb-Length Discrepancy<sbt aid="1049352">Full-Length Standing Anteroposterior Radiograph Compared with Scanogram</sbt>

• DOI: 10.2106/jbjs.e.01179
• Publication Date: 2006-10-02T17:04:42Z
• Authors: Sanjeev Sabharwal
• Keywords: Adult; Male; Adolescent; Tibia; Posture; Contrast Media; Infant; Reproducibility of Results; Middle Aged; Leg Length Inequality; 03 medical and health sciences; 0302 clinical medicine; Child, Preschool; Humans; Body Weights and Measures; Female; Femur; Child; Tomography, X-Ray Computed; Aged; Retrospective Studies

Although a scanogram is commonly used to measure limb-length discrepancy, there are several potential pitfalls associated with this imaging technique. The purpose of the present study was evaluate results obtained use full-length standing anteroposterior radiograph lower extremities and compare them those scanogram. Both studies were performed using computed radiography.One hundred eleven patients discrepancy had made on same day. included seventy-nine children thirty-two adults in whom secondary trauma (55%), congenital shortening (18%), Blount disease (14%), or another cause (13%). Limb length measured utilizing both studies. agreement between assessed correlation coefficient r, limits two assessed.An average magnification 4.6% (3.3 cm) observed association measurement extremity radiograph. mean difference limb-length-discrepancy measurements techniques 0.5 cm, (that is, plus minus standard deviations) 1.5 cm. When compared that scanogram, r 0.96. A >0.5 cm mechanical axis deviation >2 Remaining variables, including age, gender, etiology, ruler inclination, did not correlate these studies.The very similar especially absence substantial deviation. These findings support as initial for presenting unequal limb lengths. This approach allows more comprehensive radiographic evaluation extremity, deformity analysis, while reducing expense radiation exposure additional assessment discrepancy.