• 펄프종이기술
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• 제34권4호
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• pp.30-36
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• 2002

This research was conducted to investigate the feasibility of using deinked pulp of white ledger(DIP) for the manufacture of high quality premium tissue. The three types of tissues were prepared using the softener treated bleached DIP, softener treated mixed pulp of unbleached DIP and virgin pulp, and untreated mixed pulp of bleached DIP and virgin pulp, respectively, and their tensile index. softness, and brightness were measured and compared. The bulk and surface softness increased only slightly by the addition of softener(0.2% mineral oil) into the bleached DIP. The tensile index was decreased by 15∼30%, and the brightness was the range of 86% to 87% ISO. The softener(0.2∼0.8% mineral oil or dialkyl imidazoline) treatment of mixed pulp of unbleached DIP and virgin pulp Improved the bulk and surface of tissue considerably. However, the brightness was low as 85% ISO or below. Although the softness of the tissue made from bleached DIP blended with virgin pulp was the lowest among three types of tissues evaluated, its tensile index was the highest and brightness was 87∼88% ISO. Based on the results, it may be predicted that the bleached DIP blended with virgin pulp is the best raw material for the manufacture of high quality premium tissue if softener treatment is applied to mixed pulp, because the softness can be improved by the addition of softener. In general, the softness of tissue was improved with the increase in the amount of softener: However, the tensile index inversely proportional to the amount of softener added. Dialkyl imidazoline was more effective than mineral oil with respect to the improvement in softness, even though the loss in tensile index was severe with the treatment of dialkyl imidazoline.

• 디지털융복합연구
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• 제13권9호
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• pp.489-495
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• 2015

BI-RADS의 구분에 따라 Algorithm의 변화로 영상의 질을 개선하는 기법을 이용하여 시각적 가시화의 차이를 일치도와 민감도로 평가하였다. 유방촬영을 시행한 172명을 대상으로 유방촬영의 판독소견과 자료 체계의 신뢰도를 평가하였다. Category 5단계(C0,C1,C2,C3,C4), 유방 실질 함유량 4단계(Fatty, Fibroglandular, Heterogeneous nodular, Diffuse dense), 병변 3종류(석회화, 결절, 종괴)로 분류하여 TE와 PV의 신뢰도를 평가하고, 민감도와 진단의 일치도, 정확도를 평가함으로 다방면의 융복합적 분석을 하였다. TE보다 PV가 병변의 신뢰도와 민감도와 정확도가 높았다. 유방 실질 함유량에 따른 평가에서 정확도는 PV가 높았다. TE에서는 Fatty는 모두에서, Fibroglandular는 종괴와 석회화가, Diffuse dense는 결절과 석회화가 구별이 용이하였다. PV에서는 Fatty는 모두에서, Fibroglandular는 결절, Heterogeneous nodular은 결절과 종괴, Diffuse dense는 결절과 석회화가 구별이 용이하였다. 민감도는 결절은 Fatty, Fibroglandular, Heterogeneous nodular에서 TE가 더 민감했고, 종괴에서는 Heterogeneous nodular, Diffuse dense에서 TE가 더 민감했으며, 석회화에서는 모두에서 TE가 더 민감하였다. 이에 Algorithm 기법을 적절히 변화시켜 활용한다면 진단과 판독에 정확성을 높일 것이라 사료된다.