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Impact of nodular size on the predictive values of gray-scale,color-Doppler ultrasound,and sonoelastography for assessment of thyroid nodules 被引量:8
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作者 Yu-rong HONG Yu-lian WU +2 位作者 Zhi-yan LUO Ning-bo WU Xue-ming LIU 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2012年第9期707-716,共10页
Objective:To define the roles of gray-scale,color-Doppler ultrasound,and sonoelastography for the assessment of thyroid nodule to determine whether nodule size affects the differential diagnosis of benign and malignan... Objective:To define the roles of gray-scale,color-Doppler ultrasound,and sonoelastography for the assessment of thyroid nodule to determine whether nodule size affects the differential diagnosis of benign and malignant.Methods:A total of 243 consecutive subjects(214 women,29 men) with 329 thyroid nodules were examined by gray-scale,color-Doppler ultrasound,and sonoelastography in this prospective study.All patients underwent surgery and the final diagnosis was obtained from histopathological examination.Results:Three hundred and twenty-nine nodules(208 benign,121 malignant) were divided into small(SNs,5-10 mm,n=137) and large(LNs,>10 mm,n=192) nodules.Microcalcifications were more frequent in malignant LNs than in malignant SNs,but showed no significant difference between benign LNs and SNs.Poorly-circumscribed margins were not significantly different between malignant SNs and LNs,but were less frequent in benign LNs than in benign SNs.Among all nodules,marked intranodular vascularity was more frequent in LNs than in SNs.By comparison,shape ratio of anteroposterior to transverse dimensions(A/T) ≥1 was less frequent in LNs than in SNs.Otherwise,among all nodules,marked hypoechogenicity and elasticity score of 4-6 showed no significant difference between LNs and SNs.Conclusions:The predictive values of microcalcifications,nodular margins,A/T ratio,and marked intranodular vascularity depend on nodule size,but the predictive values of echogenicity and elastography do not. 展开更多
关键词 ULTRASOUND Thyroid nodules SONOELASTOGRAPHY nodule size
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Plasma polymerized acetylene deposition using a return corona enhanced plasma reactor
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作者 Rokibul ISLAM Shuzheng XIE +1 位作者 Karl R ENGLUND Patrick D PEDROW 《Plasma Science and Technology》 SCIE EI CAS CSCD 2017年第8期90-96,共7页
A corona based weakly ionized plasma source was developed to deposit plasma polymerized acetylene coating at atmospheric pressure. The plasma source included a distinctive point-topoint geometry consisting of an array... A corona based weakly ionized plasma source was developed to deposit plasma polymerized acetylene coating at atmospheric pressure. The plasma source included a distinctive point-topoint geometry consisting of an array of high voltage needles and an array of protrusions placed over a grounded screen. The geometry facilitated various corona discharge modes that included return corona to contribute plasma polymerized acetylene deposition downstream from the corona section. Scanning probe techniques were used to investigate deposition on both the leading surface and the trailing surface of substrates. Deposition was initiated as distinct nodules that merged to form a thin plasma polymerized coating. 展开更多
关键词 acetylene corona return nodules downstream initiated weakly nucleation resistive sized
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