• Radiation Oncology Journal
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• v.17 no.1
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• pp.84-88
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• 1999

Purpose :To develop a method for verifying a treatment setup in stereotactic radiotherapy by ma- tching portal images to DRRs. Materials and Methods : Four pairs of orthogonal portal images of one patient immobilized by a thermoplastic mask frame for fractionated stereotactic radiotherapy were compared with DRRs. Portal images are obtained in AP (anteriorfposterior) and lateral directions with a target localizer box containing fiducial markers attached to a stereotactic frame. DRRs superimposed over a planned iso-center and fiducial markers are printed out on transparent films. And then, they were overlaid over onhogonal penal images by matching anatomical structures. From three different kind of objects (isgcenter, fiducial markers, anatomical structure) on DRRs and portal images, the displacement error between anatomical structure and isocenters (overall setup error), the displacement error between anatomical structure and fiducial markers (irnrnobiliBation error), and the displacement error between fiducial markers and isocenters (localization error) were measured. Results : Localization error were 1.5$\pm$0.3 mm (AP), 0.9$\pm$0.3 mm (lateral), and immobilization errors were 1.9$\pm$0.5 mm (AP), 1.9$\pm$0.4 mm (lateral). In addition, overall setup errors were 1.0$\pm$0.9 mm (AP), 1.3$\pm$0.4 mm (lateral). From these orthogonal displacement errors, maximum 3D displacement errors($\sqrt{(\DeltaAP)^{2}+(\DeltaLat)^{2}$)) were found to be 1.7$\pm$0.4 mm for localization, 2.0$\pm$0.6 mm for immobilization, and 2.3$\pm$0.7 mm for overall treatment setup. Conclusion : By comparing orthogonal portal images with DRRs, we find out that it is possible to verify treatment setup directly in stereotactic radiotherapy.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.8
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• pp.52-59
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• 2007

In this paper, we analyzed and measured implant isolation characteristics for a 1.25 Gbps monolithic integrated hi-directional (M-BiDi) optoelectronic system-on-a-chip, which is a key component to constitute gigabit passive optical networks (PONs) for a fiber-to-the-home (FTTH). Also, we derived an equivalent circuit of the implant structure under various DC bias conditions. The 1.25 Gbps M-BiDi transmit-receive SoC consists of a laser diode with a monitor photodiode as a transmitter and a digital photodiode as a digital data receiver on the same InP wafer According to IEEE 802.3ah and ITU-T G.983.3 standards, a receiver sensitivity of the digital receiver has to satisfy under -24 dBm @ BER=10-12. Therefore, the electrical crosstalk levels have to maintain less than -86 dB from DC to 3 GHz. From analysed and measured results of the implant structure, the M-BiDi SoC with the implant area of 20 mm width and more than 200 mm distance between the laser diode and monitor photodiode, and between the monitor photodiode and digital photodiode, satisfies the electrical crosstalk level. These implant characteristics can be used for the design and fabrication of an optoelectronic SoC design, and expended to a mixed-mode SoC field.

• Journal of Digital Convergence
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• v.16 no.11
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• pp.633-638
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• 2018

The number of individuals with spinal cord injuries in the most countries is rising each year. However, it is reported that most of them have sexual problem, however lack of research on deal with the issues related to sex identity and maladjustment in rehabilitation counseling setting. The purpose of this article: (a) to possess an adequate knowledge of the sexual problems facing individuals with spinal cord injuries; (b) to review past research on sexuality counseling with people who have spinal cord injuries; and (c) to present for some strategies for people with spinal cord injuries in order to sexuality adjustment, through Cognitive Behavior Therapy. Some suggestions are presented.

• Progress in Medical Physics
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• v.26 no.4
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• pp.280-285
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• 2015

In radiation therapy fields, a brachytherapy is a treatment that kills lesion of cells by inserting a radioisotope that keeps emitting radiation into the body. We currently verify the consistency of radiation treatment plan and dose distribution through film/screen system (F/S system), provide therapy after checking dose. When we check dose distribution, F/S systems have radiation signal distortion because there is low resolution by penumbra depending on the condition of film developed. In this study, We fabricated a $HgI_2$ Semiconductor radiation sensor for base study in order that we verify the real dose distribution weather it's same as plans or not in brachytherapy. Also, we attempt to evaluate the feasibility of QA system by utilizing and evaluating the sensor to brachytherapy source. As shown in the result of detected signal with various source-to-detector distance (SDD), we quantitatively verified the real range of treatment which is also equivalent to treatment plans because only the low signal estimated as scatters was measured beyond the range of treatment. And the result of experiment that we access reproducibility on the same condition of ${\gamma}$-ray, we have made sure that the CV (coefficient of variation) is within 1.5 percent so we consider that the $HgI_2$ sensor is available at QA of brachytherapy based on the result.

• 대한치주과학회:학술대회논문집
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• 2000.11a
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• pp.49-50
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• 2000

• Journal of Digital Convergence
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• v.14 no.2
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• pp.489-499
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• 2016

The purpose of this study is to attempt to analyze factors affecting elderly persons' life-sustaining treatment preferences, focusing on ego integrity trait. This study used data from Elderly Profiles and Welfare Needs of the Elderly Persons(2014). The analysis sample was 10,451 cases. 86.4 percent of the sample responded that they disagree with life-sustaining treatment. Analysis results are as follows: being female(${\beta}=-.045$, p<.001), the younger(${\beta}=-.024$, p<.05), having more education years(${\beta}=.027$, p<.05), higher satisfaction of life(${\beta}=.022$, p<.05), responding that they had thought about their own funeral(${\beta}=.032$, p<.01), responding that they had used senior centers over the last one year(${\beta}=-.038$, p<.01) are related to disapproval of life sustaining treatment. This research shows that ego integrity trait such as satisfaction of life, or accepting and preparing one's own death, is related to disapproval of life-sustaining treatment.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.501-508
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• 2014

Purpose: The purpose of this study was to examine the effect of a laughter therapy on depression, of elderly. Methods: A quasi-experimental, nonequivalent control group pretest posttest design was used. Participants (n=38) included elders. Data were collected from October 1 to 22, 2013. Experimental group (n=19) participated in laughter therapy four times, once a week for 50 min per session. Questionnaires were used to measure pretest and posttest levels of depression. Results: At the end of four-week intervention, depression score (z=-2.59, p= .017) was significantly decreased in the experimental group compared to control group. Conclusion: The study results suggest that the laughter therapy is an effective intervention to reduce the depression. It seems that this program can widely be utilized as one of nursing intervention programs for the elderly.

• Journal of Digital Convergence
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• v.15 no.6
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• pp.197-206
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• 2017

The purpose of this study is to verify the effect of positive psychology-based literacy therapy program on elementary school students' happiness by constructing a literature therapy program based on positive psychology. In order to evaluate the effectiveness of the program, the experiment group and the control group were subjected to the pre - test. The same test as that carried out in the test was conducted. The pre - and post - scores of experimental group and control group were compared and analyzed by independent sample t-test. The results of this study were as follows. First, literature therapy programs based on positive psychology were found to be effective in improving elementary school students' happiness (t = 10.175, p <.001). Second, the effects of positive psychology - based literacy therapy programs on self - esteem, optimism, friendship, and family environment were found to affect all four factors (t = 5.720, p <.001). Therefore, the children tend to equate themselves with the person in the book, so that the short and concise sentence of the poem can convey emotion and emotion to the child.

• Journal of Digital Convergence
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• v.13 no.6
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• pp.205-212
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• 2015

The purpose of this study was to find out the effect that muscle activity of upper extremity and functional test in the case of the stroke patient by using the feedback mirror therapy. Sixteen subjects were recruited and randomly divided into two groups. one group was trained feedback mirror therapy and other group was action observation training. This process was carried out five times a week for eight weeks. To upper extremity test was used to MFT, FMA and in order to test UT, DM, BB, FCR, ECRL used to muscle activity. After the training, exclude FCR an upper extremity motor function of target showed significant difference between two groups and especially an experimental group showed significant muscle activity and MFT, FMA score improvement of UT, DM, BB, ECRL. Therefore, feedback mirror therapy is more upper extremity motor function and muscle activity improvement effect than action observation training.

• Journal of Digital Convergence
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• v.14 no.2
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• pp.415-426
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• 2016

The purpose of this study is to explore the effects of ACT on smartphone addiction level, self-control, and anxiety of college students with smartphone addiction. 320 college students who lived in Chonbuk completed SAPS-A. 42 students who gained more than 40 points score by SAPS-A completed SCRS, STAI, and AAQ-16 as pre-treatment. Final 18 participants were randomly assigned to 9 in the ACT group and 9 in control group. ACT program was administered for 8 sessions, follow-up study was conducted at the end of treatment and at 4 weeks follow-up periods. The results of this study were as follows: Smartphone addiction and anxiety levels of ACT group were significantly reduced and maintained until the follow-up. Self-control and Acceptance-action levels were significantly increased and maintained until the follow-up. It has been confirmed that ACT had an effect on smartphone addiction treatment, anxiety decrease and self-control ability improving, therefore, based on this result, further research will be needed to apply the ACT on smartphone addiction treatment in families, school, local community, etc.