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Breast ultrasound is the use of medical ultrasonography to perform imaging of the breast. It can be considered either a diagnostic or a screening procedure. It may be used either with or without a mammogram.〔(【引用サイトリンク】title=Breast ultrasound: MedlinePlus Medical Encyclopedia )〕 It may be useful in younger women, where the denser fibrous tissue of the breast may make mammograms more difficult to interpret.〔(【引用サイトリンク】title=FDA approves first breast ultrasound imaging system for dense breast tissue )〕 Automated whole-breast ultrasound (AWBU) is an ultrasound investigation of the breast that is largely independent of the operator skill and that allows to reconstruct volumetric images of the breast. Using high-frequency ultrasound, a diagnostic evaluation of the lactiferous ducts by means of ultrasound (duct sonography) can be performed. In this manner, dilated ducts and intraductal masses can be made visible. Another technique for visualizing the system of lactiferous ducts is galactography, which allows a wider area of the lactiferous duct system to be visualized. A type of ultrasound examination to measure tissue stiffness, which is used to detect tumours, is elastography. Breast ultrasound is also used to perform fine-needle aspiration biopsy and ultrasound-guided fine-needle aspiration of breast abscesses. == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Breast ultrasound」の詳細全文を読む スポンサード リンク
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