1Department of Internal Medicine, Saiseikai Nara Hospital, 2Department of Radiology, Saiseikai Nara Hospital, 3Department of Otorhinolaryngology, Saiseikai Nara Hospital, 4Department of Radiology, Nara Prefectural Mimuro Hospital, 5Department of Oncoradiology, Nara Medical University, 6Second Department of Internal Medicine, Nara Medical University
Color flow imaging, Power mode, Thyroid nodule, Ultrasonography, Velocity mode
We investigated the usefulness of color flow imaging (CFI) in the diagnosis of thyroid nodules by comparing results obtained with velocity mode and power mode imaging. Thirty-three thyroid nodules (7 papillary carcinomas, 3 follicular carcinomas, 16 follicular adenomas, and 7 adenomatous goiters) were examined. We classified color flow pattern of thyroid nodules depicted by CFI into six groups: type Ⅰ, perinodular color flow alone; type Ⅱ, intranodular spotty color flow; type Ⅲ, intranodular short linear color flow; type Ⅳ, intranodular moderate color flow; type Ⅳ-A, branchy color flow; type Ⅳ-B, tortuous color flow; and type Ⅴ, intranodular marked color flow. Color flow patterns observed in powermode, studies of the benign and malignant groups differed significantly. No statistically significant differences were found when velocity mode was used, however. This study suggests that power mode CFI is useful in the diagnosis of thyroid nodules. CFI appears liltely to become more precise and more useful as the technology develops and the body of data obtained with it grows.