Key result
Helical chest CT evaluation demonstrated a normal mean interatrial fat thickness of 4.6 mm anterior and 3.7 mm posterior to the fossa ovalis.
Why the study?
What is the normal thickness of fat in the interatrial septum as demonstrated by CT?
Cross-Sectional (n=87)
What is the normal thickness of fat in the interatrial septum as demonstrated by CT?
The normal range of interatrial fat thickness on CT is up to 9.6 mm anterior and 9.9 mm posterior to the fossa ovalis, which can help differentiate normal fat from pathological lipomatous hypertrophy.
Answers are grounded in this paper and cite their sources.
CT norms for interatrial septal fat now available; leaves open clinical correlation and outcome studies.
PURPOSE: This study was performed to determine the normal thickness of fat in the interatrial septum as demonstrated by CT. METHOD: Eighty-seven subjects underwent helical chest CT examination as part of a separate protocol to compare the quantification of coronary artery calcification by CT to coronary angiographic findings, using a slice width of 3 mm, reconstructed every 1.5 mm. The thickness of the interatrial fat in both groups was measured anterior and posterior to the fossa ovalis. The mean and standard deviation were calculated. RESULTS: The mean thickness of interatrial fat anterior and posterior to the fossa ovalis was 4.6 (SD = 2.5) and 3.7 (SD = 3.1) mm, respectively. CONCLUSION: The normal range of thickness of the interatrial fat is 0-9.6 mm anterior to and 0-9.9 mm posterior to the fossa (2 SD above the mean).
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Broderick et al. (1996) conducted a cross-sectional in Coronary artery calcification evaluation (n=87). Helical chest CT was evaluated on Thickness of interatrial fat anterior and posterior to the fossa ovalis. Helical chest CT evaluation demonstrated a normal mean interatrial fat thickness of 4.6 mm anterior and 3.7 mm posterior to the fossa ovalis.
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