Enter the AP and transverse diameters of a thyroid nodule to calculate its aspect ratio, assess malignancy risk, and help interpret your ultrasound report.
Enter nodule dimensions to calculate.
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When you receive a thyroid ultrasound report and are unsure how to calculate or interpret the nodule's aspect ratio, this tool provides a quick calculation and preliminary assessment. The aspect ratio of a thyroid nodule is the ratio of its anteroposterior (AP) diameter (depth) to its transverse diameter (width). It is a crucial morphological indicator for assessing whether a nodule is benign or malignant. By entering the AP and transverse diameters (in centimeters), this tool calculates the exact aspect ratio and provides a status prompt based on medical standards (an aspect ratio > 1, often referred to as "taller-than-wide," indicates a higher risk of malignancy).
Input values must be positive numbers in centimeters. The calculation results are for preliminary reference only and cannot replace a professional medical diagnosis. For nodules with special morphologies (e.g., cystic-solid, multiple confluent nodules), please consult a specialist.
As an auxiliary tool, these calculation results should be evaluated alongside other ultrasound features (such as margins, calcifications, etc.) for a comprehensive assessment. Example: If a nodule has an AP diameter of 1.2 cm and a transverse diameter of 1.0 cm, the aspect ratio is 1.2, indicating a higher risk of malignancy. However, the final diagnosis must be made by a physician.
