• Journal of Veterinary Clinics
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• v.31 no.6
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• pp.495-501
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• 2014

The objective of this study was to evaluate the differences and reproducibility of Hounsfield unit (HU) value and volume measurements on different computed tomography (CT) scanner types and different collimations by using a gelatin phantom. The phantom consisting of five synthetic simulated calculus spanning diameters from 3.0 mm to 12.0 mm with 100 HU was scanned using a two-channel multi-detector row CT (MDCT) scanner, a four-channel MDCT scanner, and two 64-channel MDCT scanners. For all different scanner types, the thinnest possible collimation and the second thinnest collimation was used. The HU values and volumes of the synthetic simulated calculus were independently measured three times with minimum intervals of 2 weeks and by three experienced veterinary radiologists. ANOVA and Scheff$\acute{e}$ test for the multiple comparison were performed for statistical comparison of the HU values and volumes of the synthetic simulated calculus according to different CT scanner types and different collimations. The reproducibility of the HU value and volume measurements was determined by calculating Cohen's k. The reproducibility of HU value and volume measurements was very good. HU value varied between different CT scanner types, among different beam collimations. However, there was not statistically significant difference. The percent error (PE) decreased as the collimation thickness decreased, but the decrease was statistically insignificant. In addition, no statistically significant difference in the PEs of the different CT scanner types was found. It can be concluded that the CT scanner type insignificantly affects HU value and the volumetric measurement, but that a thinner collimation tends to be more useful for accurate volumetric measurement.

• Korean Journal of Digital Imaging in Medicine
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• v.9 no.1
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• pp.21-30
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• 2007

Our objective was to evaluate the CT attenuation coefficient and noise of spatial domain filtering as an alternative to additional image reconstruction using different kernels in abdominal CT. Derived from thin collimated source images was generated using abdomen B10 (very smooth), B20 (smooth), B30 (medium smooth), B40 (medium), B50 (medium sharp), B60 (sharp), B70 (very sharp) and B80 (ultra sharp) kernels. Quantitative CT coefficient and noise measurements provided comparable HU (hounsfield) units in this respect. CT attenuation coefficient (mean HU) values in the abdominal were 60.4$\sim$62.2 HU and noise (7.6$\sim$63.8 HU) in the liver parenchyma. In the stomach a mean (CT attenuation coefficient) of -2.2$\sim$0.8 HU and noise (10.1$\sim$82.4 HU) was measured. Image reconstructed with a convolution kernel led to an increase in noise, whereas the results for CT attenuation coefficient were comparable. Image medications of image sharpness and noise eliminate the need for reconstruction using different kernels in the future. CT images increase the diagnostic accuracy may be controlled by adjusting CT various kernels, which should be adjusted to take into account the kernels of the CT undergoing the examination.

• Proceedings of the Korea Society of Poultry Science Conference
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• 2004.11a
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• pp.35-36
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• 2004

A total of 1.200 eggs obtained from 312-day-old Hy-line Brown layer breeder hens and 319-day-old Hy-line Brown commercial layer hens (600 eggs obtained from each ones) were used to investigate the effects of storage period, storage temperature, and insemination of hens on the change of albumen height, Haugh unit (HU), albumen pH, shell strength, and yolk color. Eggs were stored up to 14 days after lay at $3\;^{\circ}C\;or\;10\;^{\circ}C$ and sampled one day after stored and then 24 hours interval. Longer periods of storage resulted in lower albumen height and HU at both storage temperatures, but in higher albumen pH. The eggs stored at $3\;^{\circ}C$ were generally higher in HU and lower in albumen pH than the ones stored at $10\;^{\circ}C$. There was no statistically difference although the eggs obtained from the non-inseminated-hens were slightly higher in albumen height and HU than the eggs obtained from the inseminated-hens. Whereas, the eggs obtained from the non-inseminated-hens in the albumen pH of eggs stored at $3\;^{\circ}C$ was significantly (P<0.05) higher than the ones obtained from the inseminated-hens, but the albumen pH of eggs stored at $10\;^{\circ}C$ did not differ each other. The mean shell strength of the eggs obtained from the inseminated-hens was significantly (P<0.05) stronger than that of the eggs obtained from the non-inseminated-hens at both storage temperatures. Albumen height and albumen pH were negatively correlated(P<0.01~0.001) in both inseminated and non-inseminated-hen's egg groups. The degree of yolk colors were not significantly changed overall of the experimental periods in both storage temperatures. The study suggests that the change of egg freshness such as albumen height and HU are relatively more associated with storage period and storage temperature than insemination or non-insemination of hens.

• The Journal of Korean Philosophical History
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• no.42
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• pp.233-258
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• 2014

This article investigates the concept of the xing(性) used by Hu Hong. Hu Hong's philosophical system considered to top priority for xing is called xingbunlun(性本論), and he suggested the characteristics of xing as follows. First, Hu Hong regarded xing as the fundamental of whole world and related to the specific individual things, so he constructed the concept of xing in the perspective of ontology. Namely while xing is ti(體) the root of all the world, it is the realization of the uniqueness of the individual things. Also he considered xing which of the ontological aspect developed various psychological aspect contained xin (心), qing(情), yu(欲), etc. Seond, As Hu Hong regulated that wei fa(未發) is xing and yi fa(已發) is xin, he defined the ideal relation between xing and xin as xingtixinyong(性體心用). And he considered that the sage and the ordinary peoples are equal in the xing's aspect of wei fa, but they are not equal in ability of the xin in the aspect of wei fa. Hu Hong thought that the only sage realized the ideal relation between xing and xin in this world, because he keep his mind silent. So Hu Hong suggested the possibility of moral cultivation to the ordinary peoples, expressing that human nature realized the function of the mind(成性), in order that they realized ideal relation by following ren(仁). Third, unlike the traditional notion, Hu Hong understood the meaning of xing in the aspect of ontology. He interpreted the shan(善) of xingshan(性善) as the meaning of exclamation, which implied that "the innate goodness of human nature(性善)" meant "Human nature is good." Because Hu Hong thought that the meaning of xing transcended the relative concept of good and evil, and accepted the whole world affirmatively. In the opinion of Hu Hong, as the concept of xing had two ways of intentionality; likes and dislikes(好惡), things formed relationship with other in this world. Then the concept of good and evil of the ethical value judgement occurred.

• The Journal of Korean Medical History
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• v.23 no.2
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• pp.1-13
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• 2010

The early Joseon era was a period when various medical systems were established and many medical literatures were published. Hwang Ja-hu(黃子厚) was a civil minister and medical professional who worked hard for maintaining government administrative system and medical regime during the Taejong and Sejong reign. Hwang Ja-hu followed his father and made MiReukWon(彌勒院) prosperous for the homeless people around Chungcheong-do Hoedeok. Hwang Ja-hu was talented in policy development as a government official. He was also learned in medicine, thus always doubled as head of JeonUiGam(典醫監). Hwang Ja-hu reformed the irrationalities in medical regime. He legalized JeonUiGam duties such as the presenting of the medicine or the preparation of the medicine and had the doctors take charge. He also suggested training acupuncture specialists(鍼灸專門醫). Hwang Ja-hu played a leading role in spreading HyangYak(鄕藥) throughout the country and reissuing [HyangYakGuGeupBang(鄕藥救急方)] due to personal philanthropism and service. He tried to defeat illnesses by letting the common people understand the symptoms and use medicine accordingly. Also he intended [HyangYakGuGeupBang(鄕藥救急方)] which was written focused on 'easiness book'(簡易方), 'experience book'(經驗方) to be used for the common people because [HyangYakJipSungBang(鄕藥集成方)] was made up a huge volume andused for training medical professionals and for accumulating knowledge. Hwang Ja-hu pursed subdivision of medical systems and specialization of medicine but also promoted medical rights. We should continue to discover and introduce medical figures who understood medicine and improved the medical systems.

• Journal of Haehwa Medicine
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• v.14 no.2
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• pp.159-169
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• 2005

Objectives and methods: We investigated 17 books to study symptoms, pathology and acupuncture & moxibustion treatment of Hu-Ro(fatigue). Results and Conclusions: 1. The symptoms of Hu-Ro are the deafness, the amblyopia, the mass of sweat, the stiff joint, etc. There are also symptoms such as the fever of palm and legs, avoiding cold temperature in the afternoon, the fever during night time, the stomach fullness and diarrhea, the powerlessness of limbs, red colored urine. 3. The representing pathological mechanisms of Hu-Ro are Yang-deficiency(陽虛), Yin-deficiency(陰虛), Energy(Qi)-deficiency(氣虛), Blood(Hyul)-deficiency(血虛). The other pathological mechanisms are deficiency of Liver, Heart, Spleen, Lung, Kidney and the basic Energy. 4. The fundamental treatment of Hu-Ro is "warming on worned ones(勞者溫之), supplying on damaged ones(損者益之), strengthening the weakened ones(虛卽補之)" as basis and also supplying blood with fostering spleen(養血建脾) and droping fever with clearing the clogged(降火淸鬱). 5. The meridians that could be used in acupuncture and moxibustion treatment application of Hu-Ro are the urinary bladder meridian, the conception vessel meridian(任脈), governor channel meridian(督脈), kidney meridian(腎經), liver meridian, heart meridian, spleen meridian, lung meridian, stomach meridian, small intestine meridian, gall bladder meridian, pericardium meridian and triple-warmer meridian in order of frequently refered. 6. The meridian points that could be used in acupuncture and moxibustion treatment application of Hu-Ro are Joksamni (足三里:25times), Sinsu(腎兪:20回), Bisu(脾兪:19回), Pyesu(肺兪:18回), Qihye(氣海:17回), Gohwang(膏肓:15回), Kwanwon(關元:14回), Sameumgyo(三陰交:13回), Eumgeuk(陰郄:12回), Daechu(大樞:12回), Sinmun(神門:11回), Simsu(心兪:11回), Nyegwan(內關:10回), Jungwan(中脘:10回) in order of frequently refered.

• Progress in Medical Physics
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• v.30 no.4
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• pp.160-166
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• 2019

This study examined the clinical use of two newly installed computed tomography (CT) simulators in the Department of Radiation Oncology. The accreditation procedure was performed by the Korean Institute for Accreditation of Medical Imaging. An Xi R/F dosimeter was used to measure the CT dose index for each plug of the CT dose index phantom. Image qualities such as the Hounsfield unit (HU) value of water, noise level, homogeneity, existence of artifacts, spatial resolution, contrast, and slice thickness were evaluated by scanning a CT performance phantom. All test items were evaluated as to whether they were within the required tolerance level. CT calibration curves-the relationship between CT number and relative electron density-were obtained for dose calculations in the treatment planning system. The positional accuracy of the lasers was also evaluated. The volume CT dose indices for the head phantom were 22.26 mGy and 23.70 mGy, and those for body phantom were 12.30 mGy and 12.99 mGy for the first and second CT simulators, respectively. HU accuracy, noise, and homogeneity for the first CT simulator were -0.2 HU, 4.9 HU, and 0.69 HU, respectively, while those for second CT simulator were 1.9 HU, 4.9 HU, and 0.70 HU, respectively. Five air-filled holes with a diameter of 1.00 mm were used for assessment of spatial resolution and a low contrast object with a diameter of 6.4 mm was clearly discernible by both CT scanners. Both CT simulators exhibited comparable performance and are acceptable for clinical use.

• Clinics in Shoulder and Elbow
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• v.18 no.2
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• pp.86-90
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• 2015

Background: Although there are several methods for evaluating bone quality, Hounsfield units (HU), a standardized computed tomography (CT) attenuation coefficient, provide a useful tool for estimating focal bone mineral density (BMD). The aim of this study is to investigate the HU for evaluating the degree of osteoporosis in greater tuberosity with regard to anchor positioning. Methods: Forty patients diagnosed as normal on shoulder CT were included and categorized according to age and gender. Axially sectioned CT images were processed to 3-dimensional models containing information about bone quality using Mimics (14.11 platform v14.1.1.1 Materialise). Three-dimensional anchors were simulated and positioned according to 6 regions of interest (ROI) in the greater tuberosity classified using Tingart's system. Mean HU of intra-anchor volumes in the 6 regions was measured. Results: A significant decrease in HU was observed with increasing age (p=0.0001) and menopause (p<0.001). A significant difference in HU was found between male and female groups with males showing the higher values (p=0.0001). HU of proximal areas of ROI was higher than those of distal areas (p<0.005). However, although mean HU of distal posterior ROI showed the lowest values, no statistically significant difference was found between anterior, middle, and posterior regions (p=0.087). Conclusions: Mean HU of ROIs provides a tool for preoperative assessment of focal BMD, which is a factor of suture anchor stability and can be used to aid decision-making regarding secure anchor positioning for rotator cuff repair. Our data support that the most secure point is the proximal regions of ROI.

• Journal of the Korea Society of Computer and Information
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• v.15 no.3
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• pp.91-97
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• 2010

Recently Hu-Niu-Yang proposed the user authentication scheme to improve Liu et al's scheme. But the Hu-Niu-Yang's scheme has not been satisfied security requirements considering in the user authentication scheme using the password based smart card. In this paper, we proved that Hu-Niu-Yang's scheme is vulnerable to the off-line password guessing attack in case that the attacker steals the user's smart card and extracts the information in the smart card. Also, the improved user authentication scheme solving the security vulnerability was introduced, thus preventing the attacks, such as password guessing attack, forgery attack impersonation attack, and replay attack. For preventing those attacks, the our proposed scheme need more hash functions and exclusive-OR operations than Hu-Niu-Yang's scheme.

• Toxicological Research
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• v.21 no.3
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• pp.209-218
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• 2005

We investigated effects of recombinant human erythropoietin (rHuEPO) on profiles of mRNA transcripts in 6 male cynomolgus (M. fascicularis) monkey's spleen for 4 weeks. Six monkeys, composed of control and treatment group (Control : M1, M2, M3: Treatment : M4, M5, M6) were intravenously administered 3 times per week without or with a dose of rHuEPO 2730 IU/0.1 ml/kg. After 4 weeks rHuEPO treatment, spleen was removed for RNA isolation. Splenic gene expression was assessed using Affymetrix U133A 2.0 arrays containing 18,400 transcripts and variants, including 14,500 well-characterized human genes. Gene expression pattern was very different between individuals even in same treatment. In rHuEPO treated groups showed number of genes were up- or down-regulated (M4: 79: M5: 48; M6: 73 genes). Six genes (epidermal growth factor receptor, calgranulin A, estrogen receptor binding site associated antigen, matrix metalloproteinase 19, zinc finger and BTB domain containing 16, progestin and adipoQ receptor) were commonly expressed in rHuEPO treated group. The different individual response could be major considering factor in monkey experiment. Further study is needed to clarify the different individual response to rHuEPO in molecular level. This study will be valuable in the fundamental understanding and validation of molecular toxicology for bio-generic drugs including rHuEPO in cynomolgus monkey.