• Journal of Electrical Engineering and Technology
• /
• 제12권1호
• /
• pp.436-442
• /
• 2017

A novel method of Skin lesion segmentation based on the combination of Texture and Neural Network is proposed in this paper. This paper combines the textures of different pixels in the skin images in order to increase the performance of lesion segmentation. For segmenting skin lesions, a two-step process is done. First, automatic border detection is performed to separate the lesion from the background skin. This begins by identifying the features that represent the lesion border clearly by the process of Texture analysis. In the second step, the obtained features are given as input towards the Recurrent Echo state neural networks in order to obtain the segmented skin lesion region. The proposed algorithm is trained and tested for 862 skin lesion images in order to evaluate the accuracy of segmentation. Overall accuracy of the proposed method is compared with existing algorithms. An average accuracy of 98.8% for segmenting skin lesion images has been obtained.

• 대한한의학회지
• /
• 제18권2호
• /
• pp.316-325
• /
• 1997

In a 36-month period, 23 selected Patients with Acute Cerebral Infarction were studied utilizing Computerized Tomography, Barthel Index in an attempt to correlate Brain Computerized Tomography findings with 1week, 4weeks rehabilitation and evaluate the influences of the size and location of the lesion. The study suggested that the size of the lesion had impact on 4 weeks rehabilitation. There was significant different between the patients with Middle Cerebral Artery Pial Territory Infarction(I.P.B.M.C.A.) lesion and the patients with Lacunar Infarction(L.I.), Striatocapsular Infarction(S.C.I.), Internal Watershed Infarction(I.W.I.) lesion, but there was no significant difference between the patients with L.I. lesion and the patients with S.C.I. lesion and the patients with I.W.I. lesion. The size and location of the lesion should be considered together in predicting the functional outcomes of Acute Cerebral Infarction.

• 한국동물위생학회지
• /
• 제23권2호
• /
• pp.113-124
• /
• 2000

A total of 500 sera and lungs of slaughtered pigs were examined to investigate antibody titer, prevalence of pulmonary lesion, and interrelation among lung lesion score, type of pulmonary lesion and antibody titers by ELISA. The results obtained were as follows ; 1. The highest distribution of antibody titer was showed at 20 - 80 in M hyopneumoniae, 160-640 in P multocida type A and 160 - 640 in A pleuropneumoniae serotype 2 and 5. 2. The prevalence of pulmonary lesions was 84.0%, mean pulmonary lesion and mean lung score listed as 24.0$\pm$19.8% and 2.5$\pm$1.6, respectively. 3. In the prevalence of type of pulmonary lesion, enzootic pneumonia, pleuropneumonia and pleuritis were 58.2%, 10.0% and 15.8%, respectively. 4. Lung lesion score and type of pulmonary lesion were not interrelated with the distribution of antibody titer to specific pathogens, and causative pathogens of respiratory diseases were complicated with various bacteria.

• 대한관절경학회지
• /
• 제9권2호
• /
• pp.186-193
• /
• 2005

목적: ALPSA(anterior labroligamentous periosteal sleeve avulsion) 병변과 Bankart 병변을 관절경하에서 구별할 수 있는지를 알아보고자 하였으며 ALPSA 병변의 임상적 의의를 알아보고자 하였다. 대상 및 방법: 견관절의 전방 불안정성으로 관절경하에서 Bankart 복원술을 시행한 66예를 대상으로 하였다. 자기 공명 영상의 판독상 Bankart 병변은 56예(85%) ALPSA 병변은 10예(15%)였다. 각 병변의 관절경 소견을 분류하였으며 결과는 평균 22개월 추시하였다. 결과: Bankart 병변 보다 ALPSA 병변의 발생 시기가 보다 젊은 층에서 발생하였다 관절경하에서 ALPSA 병변은 여러 형태를 보였으며 특히 하내측으로 많은 전위를 보인 경우가 5예에서 관찰되었다. Bankart 병변도 심한 전위를 보인 경우가 21예였으며 견갑 경부로부터 뚜렷하게 외측 전위되지 않고 하내측으로 전위된 경우는 관절경하에서 ALPSA 병변과 구별하기 어려웠다. 재발은 ALPSA 군에서는 재탈구는 없었으나 불안감이 2예(20%)에서 있었고 하내측으로 많은 전위를 보인 예에서 나타났으며, Bankart 군에서는 재탈구 1예, 아탈구 1예, 불안감 2예로 총 4예(7.1%)에서 있었다. 결론: 하내측으로 심하게 전위된 Bankart 병변과 ALPSA 병변은 식별이 용이하지 않았으며 전위가 심한 ALPSA 병변에서 재발율이 높았다. 따라서 복원술시 ALPSA 병변을 철저하게 재분리하는데 보다 주의가 요할 것으로 사료된다.

• 치과방사선
• /
• 제29권1호
• /
• pp.309-325
• /
• 1999

Purpose: To find out the effects that different tomographic angles have on the osteophytic lesion detectability of condyle head by comparison the individualized lateral tomographic image with the various tomographic angled images using SCANORA/sup (R)/. Materials & Methods: This study is performed to simulate osteophytic lesions by a series of dentin chips placed at six locations on condyle head. The control angle is 15° and from this angle. tomographic angle were varied with -10°, +10°, +20°. All the images with each sized dentin chip were scored by three dental radiologists with the use of confidence levels for presence or absence of the lesion, each examiner viewed one of the images twice. A rating scale from 0 to 2 (0, lesion definitely not present; 1. uncertain if lesion is present; 2, lesion definitely present). Responses were assessed by Tukey' s multiple comparison method and kappa value. Results: 1. The lesion size of 0.3 mm could not be detected in all the tomographic angles. As the size of the lesion increased the average value of lesion detectability also increased. 2. In the lesion sizes of 0.7 mm there was statistically significant difference between the 15° control angle and the altered tomographic angles (p<0.05). In 1.0 mm lesion there was no significant difference in the ±10° altered angles (p >0.05). but there was significant difference in the altered angle (p<0.05). In the lesion sizes of 0.3 mm and 2.0 mm there was no significant difference between the 15° control angle and all the altered angles (p >0.05). 3. In the anteromedial. anterosuperior, anterolateral area there was no significant difference between the 15° control angle and the ±10° altered angle (p >0.05), but in the comparison with the +20° altered angle there was significant difference (p<0.05). Conclusion: When imaging the lateral tomography of the temporomandibular joint used by SCANORA/sup (R)/, it can be considered that in the osteophytic lesion size of 2 mm and above, the tomographic angle difference within +20° to the horizontal angle of the condyle. has little effect on the lesion detectability. And in the lesion size of 1 mm, the altered angle within ±10° also has little effect on the lesion detectability.

• 한국가금학회지
• /
• 제6권2호
• /
• pp.103-108
• /
• 1979

1 닭의 콕시듐증 병변을 인식하고 확인하는데는 장의 각기 다른 부위에서 발견되는 콕시듐 원충에 달려있다. 병변에 대한 지식과 원충 확인이 lesion scoring에서 요구되고 있지만. 원충을 확인하는 것이 lesion scoring의 기본목적은 아니다. (중략)

• 대한족부족관절학회지
• /
• 제6권1호
• /
• pp.28-34
• /
• 2002

Purpose: The purpose of this study was to evaluate outcome of ankle arthroscopy with high anteromedial and anterolateral portals for osteochondral talar lesion. Materials and Methods: A prospective study was conducted between March 1992 and January 2000 by one surgeon. Total 48 patients who had osteochondral talar lesion were included. Using high anteromedial and anterolateral portals, arthroscopic treatment was performed. A functional evaluation was performed with the Karlsson scoring scale. Results: Of the 48 patients, 28 cases had anterolateral talar lesion and 18 cases had medial talar lesion and 2 cases had central lesion. The 42 cases(87.5 %) had trauma history. On Karlsson scoring scale, anterolateral talar lesion was better than medial talar lesion(p=0.035). Conclusion: Using high portals, we could get better visualization of talar dome and posterior chamber of ankle, and do some limited procedures without additional portals. Osteochondral lesions were treated successfully only when they were traumatically induced and localized without diffuse chondromalacia of talus and tibia.

• 대한치과의사협회지
• /
• 제48권4호
• /
• pp.297-307
• /
• 2010

Noncarious cervical lesions(NCCLs) are characterized as structural defects found on the tooth surface of the cement-enamel junction. Loss of tooth structure through noncarious mechanisms may vary in etiology and clinical presentation for each individual but presently many clinician now classify this as tooth failure of abfraction due to the stress applied in the cervical area of the tooth under oral physiological and pathological loads. In the current study, we investigated the stress distribution of maxillary premolar with NCCL using simulated 3D finite element analysis. The results were as follows: 1. In the sound maxillary premolar, the stresses were highly concentrated at cervical enamel surface of the mesiobuccal line angle, asymmetrically. 2. Once the lesion has been formed, the highest stress concentration was observed around the apex of the wedge shaped lesion. 3. In four types of NCCL, the patterns of stress distribution were similar and the peak stress was observed at mesial corner and also stresses concentrated at lesion apex. 4. Lesion cavity modification of rounding apex, reduced stress of lesion apex. 5. When restoring the notch-shaped lesion, material with high elastic modulus worked well at the lesion apex and material with low elastic modulus worked well at the cervical cavosurface margin.

• 한국식물병리학회지
• /
• 제10권1호
• /
• pp.34-38
• /
• 1994

Effect of temperature, relative humidity (RH) and free water period on anthracnose development by Colletotrichum gloeosporioides was examined on red pepper fruits. Mycelial growth of C. gloeosporioides was best at 28$^{\circ}C$, but greatly retarded at 32$^{\circ}C$. Minimum inoculum density required for lesion development varied with isolates, but was mostly above 1.0$\times$105 conidia/ml. Optimum temperature for lesion development on fruits was 31$^{\circ}C$. Percentage of lesion development was decreased as incubation temperature decreased. similar trend of temperature response was observed for acervulus formation on the developed lesions. Acervuli were not developed on the lesion as low as at 19$^{\circ}C$. Lesion development and acervuli formation tended to increase as increasing RH, but were greatly inhibited at the RH lower than 88%. More than 2 hours of free water period after inoculation were required for lesion development. Lesion development was increased as free water period increased. This study indicates that anthracnose development by C. gloeosporioides favors the conditions of high temperature above 28$^{\circ}C$, high humidity above 90% RH, and requires free water period longer than 2 hours.

• 대한관절경학회지
• /
• 제12권2호
• /
• pp.134-138
• /
• 2008

견관절 상완순 전후방(SLAP: Superior labrum anterior to posterior) 병변은 상부 관절와순 단독 손상으로 발견되기도 하고, 견관절 재발성 탈구 환자에서 전하방 관절와순의 파열, 즉 Bankart 병변의 연장으로 상부 관절와순까지 파열이 진행된 동반 손상으로 발생하기도 하며, 드물게 후방 Bankart 병변을 동반하는 경우도 있다. 여러 가지 병변과 동반된 SLAP 병변이 보고되어 왔으나 그 중 후방 Bankart 병변과 동반하여 발생한 후방 II형 SLAP 병변에 대한 보고는 미미하고 그 병변에 대한 관절경적 복원술 시 봉합 나사(suture anchor)의 삽입과 봉합에 주의할 점이 있다. 저자들은 투구 동작과 같은 흔한 손상 기전이 아닌 팔을 뻗친 상태에서 넘어지면서 발생한 외상으로 야기된 본 증례에 대해 관절경적 복원술을 시행하여 만족할 만한 결과를 얻었기에 보고하는 바이다.