LEDs: Not so Benign?

Nick Smith

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LEDs: Not so Benign?

机译：LED：不是那么良性吗？

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Led lighting is starting to become commonplace due to the savings which they offer. Now, while I am all in favour of that, I do think that before we travel too far down the line with LEDs, their disposal impacts need to be considered. If I am correct the LED is largely based around gallium arsenide (GaAs) which is made using arsenic.

机译：由于节省了成本，LED照明开始变得司空见惯。现在，尽管我全力支持，但我确实认为，在我们对LED进行深入研究之前，需要考虑它们的处置影响。如果我是正确的话，LED很大程度上基于使用砷制成的砷化镓（GaAs）。

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《The Lighting Journal》 |2012年第2期|p.4|共1页
作者
Nick Smith;
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收录信息美国《工程索引》(EI);
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正文语种 eng
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7. Aim: To investigate the value of ElastPQ measurement for differential diagnosis of benign and malignant focal liver lesions (FLLs) by using histologic results as a reference standard. Material and methods: A total of 154 patients were included. ElastPQ measurement was performed for each lesion in which the shear wave speed (SWS) was measured. The difference in SWS and SWS ratio of FLL to surrounding liver were evaluated, and the cut off value was investigated. Receiver operating characteristic (ROC) curve was plotted to evaluate the diagnostic performance. Histology as a gold standard was obtained by surgery in all patients. Results: A total of 154 lesions including 129 (83.7 ) malignant FLLs and 25 (16.3 ) benign ones were analysed. The SWS of malignant and benign FLLs was significantly different, 2.77±0.68 m/s and 1.57±0.55 m/s (p<0.05). The SWS ratio of each FLL to surrounding liver parenchyma was 2.23±0.49 for malignant and 1.14±0.36 for benign FLLs (p<0.05). The cut off value for differential diagnosis was 2.06 m/s for SWS and 1.67 for SWS ratio. Conclusions: ElastPQ measurement provides reliable quantitative stiffness information of FLLs and may be helpful in the differential diagnosis between malignant and benign FLLs. [O] . Yi Dong, Wen-Ping Wang, Yadan Xu, 2017

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LEDs: Not so Benign?

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