Cranial Bone Density and Scalp Perfusion in Positional Plagiocephaly: Quantitative Assessment Using Low-Dose Computed...

Area of Science:

• Pediatric Radiology
• Craniofacial Development
• Medical Imaging

Background:

• Positional plagiocephaly is a common infant condition.
• Quantitative assessment of cranial bone characteristics in plagiocephaly is limited.
• Understanding bone density and scalp perfusion is crucial for treatment evaluation.

Purpose of the Study:

• To assess cranial bone density and scalp perfusion in infants with positional plagiocephaly.
• To evaluate the changes in bone density and perfusion after helmet therapy.
• To determine the utility of low-dose computed tomography (CT) in evaluating these parameters.

Main Methods:

• Retrospective analysis of 61 infants with moderate to severe positional plagiocephaly undergoing low-dose CT.
• Quantification of cranial bone density using Hounsfield units.
• Measurement of scalp perfusion using laser Doppler flowmetry in a subset of patients post-helmet therapy.

Main Results:

• Infants with positional plagiocephaly showed significantly lower bone density on the flattened side compared to the contralateral side (P<0.001).
• Reduced scalp perfusion was observed on the flattened side (P<0.01).
• Helmet therapy led to significant improvements in both bone density and scalp perfusion.

Conclusions:

• Positional plagiocephaly is associated with localized reductions in cranial bone density and scalp perfusion.
• These deficits appear to be reversible with helmet therapy.
• Low-dose CT is a practical tool for diagnosing and quantitatively evaluating cranial deformities in infants.