Echocardiographic flow pattern of patent ductus arteriosus: a guide to indomethacin treatment in premature infants

中國醫藥大學機構典藏 China Medical University Repository, Taiwan > 台中附設醫院 > 期刊論文 > Item 310903500/29175

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题名:	Echocardiographic flow pattern of patent ductus arteriosus: a guide to indomethacin treatment in premature infants
作者:	Su, BH;Peng, CT;Tsai, CH
贡献者:	附設醫院兒科部;China Med Coll Hosp, Dept Paediat, Taichung, Taiwan
日期:	1999
上传时间:	2010-09-24 14:25:25 (UTC+8)
出版者:	BRITISH MED JOURNAL PUBL GROUP
摘要:	PURPOSE: To increase the capabilities of ultrasonographic (US) technology for the differential diagnosis of solid breast tumors by using a neural network. MATERIALS AND METHODS: One hundred forty US images of solid breast nodules were evaluated. When a sonogram was obtained, an analog video signal from the VCR output of the scanner was transmitted to a notebook computer. A frame grabber connected to the printer port of the computer was then used to digitize the data. The suspicious tumor region on the digitized US image was manually selected. The texture information of the subimage was extracted, and a neural network classifier with autocorrelation features was used to classify the tumor as benign or malignant. In this experiment, 140 pathologically proved tumors (52 malignant and 88 benign tumors) were sampled with k-fold cross-validation (k = 10) to evaluate the performance with receiver operating characteristic curves. RESULTS: The accuracy of neural networks for classifying malignancies was 95.0% (133 of 140 tumors), the sensitivity was 98% (51 of 52), the specificity was 93% (82 of 88), the positive predictive value was 89% (51 of 57), and the negative predictive value was 99% (82 of 83). CONCLUSION: This system differentiated solid breast nodules with relatively high accuracy and helped inexperienced operators to avoid misdiagnoses. Because the neural network is trainable, it could be optimized if a larger set of tumor images is supplied.
關聯:	ARCHIVES OF DISEASE IN CHILDHOOD 81(3):F197-F200
显示于类别:	[台中附設醫院] 期刊論文

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