Frontal horn width to intercaudate distance ratio
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View Frank Gaillard's current disclosuresAt the time the article was last revised Mostafa Elfeky had no financial relationships to ineligible companies to disclose.
View Mostafa Elfeky's current disclosures- Frontal horn width to intercaudate distance ratio (FH/CC)
- FH/CC
Frontal horn width to intercaudate distance ratio (FH/CC) is used in assessing patients with suspected Huntington disease. An alternative measurement is intercaudate distance to inner table width ratio (CC/IT).
Measurement
On the same axial plane obtained on the ACPC (anterior commissure and posterior commissure) line, the ratio between the lateral margins of the frontal horns and the distance between the caudate heads (where they are closest).
Interpretation
The normal mean FH/CC ratio range is 2.2 to 2.6. As the caudate heads reduce in volume the CC distance will approach the FH distance, and the ratio will approach 1.
Quiz questions
References
- 1. Ho VB, Chuang HS, Rovira MJ et-al. Juvenile Huntington disease: CT and MR features. AJNR Am J Neuroradiol. 1995;16 (7): 1405-12. AJNR Am J Neuroradiol (abstract) - Pubmed citation
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