Abstract:The thyroid nodule ultrasonic characteristic referred to as "Taller-than-Wide" (TtW) is defined as a nodule's anterior-posterior diameter/left-right diameter ratio (i. e. AP/LR ratio) on transverse view. This characteristic is regarded as a major feature suggesting malignancy. On the Amer College of Radiology's TIRADS ("Thyroid Imaging Reporting and Data System") guidelines, TtW status usually indicates the need for an aspiration biopsy (FNA). Given this importance, and the subjective and technical limitations… Show more
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