Cranial Technologies

If you are a parent or healthcare professional dealing with infant head shape concerns, you may have come across the DSI Report. This powerful tool, used by Cranial Technologies, helps analyze and quantify head shape deformities using precise measurements. Understanding these numbers is the first step toward effective treatment with cranial shaping orthoses.

Here is a breakdown of the key Proportionality and Asymmetry measurements found in a DSI Report.

Proportionality Measurements help determine if brachycephaly (a broad, flattened head shape) or scaphocephaly (A long, narrow head shape) is present. These measurements evaluate the balance between the head's length and width.

The Cephalic Index (CI) is a ratio that compares the width to the length of the head. It is calculated by dividing the cranial width by the length and multiplying by 100.

75–90 is considered mild (the typical range). 90–95 is considered moderate and indicates a broader head shape. >95 is severe and indicates a significantly broader head shape.

Asymmetry Measurements help determine if plagiocephaly (a flattening on one side of the head, giving the head a parallelogram shape) is present. These measure how much the infant's head deviates from symmetrical.

Cranial Vault Asymmetry (CVA) is the difference, measured in millimeters (mm), between the longest and shortest diagonal measurements of the cranium.

5–6 mm usually indicates a mild deformity. 6–12 mm indicates a moderate deformity and >12 mm usually indicates a severe deformity.

Cranial Vault Asymmetry Index (CVAI) provides the proportionality of asymmetry. Because it is a ratio (CVA divided by the shorter diagonal measurement), it remains proportional as the infant's head grows and is independent of age.

Note: A CVAI of 6.26 is often classified as a moderate deformity, and 8.76 is often classified as severe.

If you have concerns about an infant's head shape, you can schedule a no-cost evaluation to get a detailed DSI Report and discuss treatment options.

Remember, plagiocephaly is common. Many parents have questions regarding their babies head shapes and there are many resources available. Always discuss any concerns with your pediatrician. Cranial Technologies offers head shape assessments at no cost to you. You will leave your assessment with a recommendation from our expert team, and a comprehensive report to discuss with your pediatrician.