Hand Bone Age Radiography: Comparison Between Slot-scanning and Conventional Techniques

Area of Science:

• Pediatric Radiology
• Skeletal Maturity Assessment
• Medical Imaging Techniques

Background:

• Accurate skeletal maturity assessment is crucial for managing pediatric scoliosis.
• Traditional methods use hand and wrist radiographs, often acquired after spinal imaging.
• Slot-scanning radiography shows promise for hand and wrist imaging, but requires comparison with conventional techniques for image quality and radiation dose.

Purpose of the Study:

• To compare image quality, interpretation reliability, and radiation dose of slot-scanning versus conventional radiography for hand bone age determination in children.
• To evaluate slot-scanning radiography as an adjunct for scoliosis monitoring.

Main Methods:

• Retrospective comparison of slot-scanning and conventional hand radiographs in age- and sex-matched children.
• Radiograph review by 5 blinded readers for image quality and bone age (Greulich and Pyle classification).
• Measurement of Dose Area Product and calculation of inter- and intraobserver reliability using intraclass correlation (ICC).

Main Results:

• 194 children (97 slot-scanning, 97 conventional) were included.
• Slot-scanning showed comparable image quality (1% poor vs 0%) and excellent interpretation reliability (ICC=0.948 interobserver, 0.996 intraobserver).
• Slot-scanning radiography utilized significantly lower radiation doses (lower Dose Area Product).

Conclusions:

• Slot-scanning radiography provides reliable hand bone age determination with high interobserver and intraobserver agreement.
• The technique uses significantly lower radiation doses compared to conventional methods.
• Slot-scanning is a reliable adjunct for pediatric scoliosis monitoring.