Bone age assessment methods: a critical review.

Area of Science:

• Pediatric radiology
• Skeletal maturity assessment
• Medical imaging techniques

Background:

• Bone age assessment provides a more accurate measure of biological and structural maturity than chronological age.
• Hand and wrist radiography is the standard method for bone age calculation.
• Automated radiographic analysis aims to reduce variability compared to manual methods.

Purpose of the Study:

• To review current methods for bone age estimation.
• To highlight the limitations of existing techniques, especially for older individuals and specific ethnicities.
• To emphasize the need for studies comparing different bone age assessment modalities in Pakistani children.

Main Methods:

• Review of recent literature (2004-2013) from PubMed and Google Scholar.
• Analysis of various bone age determination techniques including radiography, ultrasonography, CT, MRI, and dental age.
• Consideration of anatomical sites used for assessment (hand/wrist, clavicle, iliac bone, femoral head).

Main Results:

• Hand and wrist radiography is common, with automated methods improving accuracy.
• Non-radiation methods like ultrasonography are less accurate.
• For individuals aged 18-22, medial clavicle assessment (CT, MRI) is used, but CT involves high radiation.
• Dental age, iliac bone, and femoral head methods lack standardization.

Conclusions:

• Different bone age estimation methods yield varying results and have different ethnic applicability.
• Comparative studies are necessary to identify the optimal bone age assessment method for Pakistani children.
• Further research is needed for non-radiation-based and standardized techniques.