耳下腺腫瘍の音響特性--摘出標本の減衰値測定

概要

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The purpose of this study is to investigate the ultrasonic attenuation coefficient in parotid tumor to deduce its histo-pathological features. By means of the pulsetransmission technique at 2MHz frequency, attenuation coefficient in 28 freshly excised parotid tumors was measured and compared wito their histological features.The results were summarized as follows: 1) Attenuation coefficient (dB/cm) was widely spread from 0.8 to 4.1, reflecting various histopathological features of parotid tumors. 2) Pleomorphic adenomas with high attenuation were found to consist of chondroid components sometimes with rich collagen fibers. 3) Similar results were obtained in malignant parotid tumors. 4) The measurement of over-all attenuation coefficient might warrant the speculation of the dominant component of tumors of the parotid gland.
一般社団法人日本耳鼻咽喉科学会の論文