• Journal of the Korean Society of Radiology
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• v.8 no.7
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• pp.467-477
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• 2014

The purpose of this study is to offer data base for establishment of dental training x-ray generator based safety usage through surveying real radiation safety management state of radiation worker's in plan of operations that have dental training x-ray generators and use it. For it, comprehensive references were surveyed referring reports of current state of regulation technique development and domestic radiation safety evaluation and nuclear related legislation regarding radiation safety management of dental training x-ray generators. On the basis of it, questionnaires were filled in about respondent's general characteristic radiation safety manager's status current state of radiation safety management and the level of knowledge & consciousness. For the study, the survey was conducted to 224 people of radiation safety managers and university graduates training assistants and full-time professors who can treat dental training x-ray generators in education center. through this survey 95 questionnaires were used as analysis materials except the insufficient and omitted responses. As a method of analysis, the frequency and percentage were figured out with the general characteristics and safety manager's status. Chi-square test for frequency and correlation per question analysis and Pearson correlation analysis for crosslevel correlation were done with current state of radiation safety management and knowledge & consciousness level. As a result, running dental training x-ray generators was dealt with by 20's to 40's who have high education level over post undergraduate degree and major in dental hygienic. In addition, female have higher consciousness level for radiation safety management than male. It shows significal linear relation statistically(${\chi}^2$ >5, 0.1${\chi}^2$ >5, 0.3${\chi}^2$ >5, 0.3

• Journal of Veterinary Clinics
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• v.24 no.3
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• pp.331-336
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• 2007

Mammary gland tumors are the most common neoplasms occurring in female dogs. The treatments of mammary gland tumors are surgery, chemotherapy, hormonal therapy and radiational therapy, but surgical removal remains widely accepted treatment option for mammary gland tumors. The purpose of this study is to evaluate clinical outcomes of dogs which are performed surgical excision. Medical records were reviewed for dogs(79 cases) with mammary gland tumors treated surgically at Veterinary Medical Teaching Hospital in Seoul National University from 2001 to 2005. While 49 cases(62.0%) were benign, 30 cases(38.0%) were malignant tumors. The mean age of these dogs was 10.4 years old(range $1{\sim}16$ years). The maximal diameter of malignant tumors were various, whereas most of the benign tumors were smaller than 3cm(36 cases, 73.5%). In 12 cases(15.2%), regional lymph nodes were enlarged and lymph nodes of 3 cases had resected surgically. The performed techniques were total mastectomy, regional mastectomy, simple mastectomy, lumpectomy and unilateral mastectomy in order. Twenty-eight cases(35.4%) had postoperative complications consisted of recurrence of tumors, necrosis, dehiscence, delayed healing and edema of limbs. The recurrence rates of benign and malignant mammary gland tumors were 8 cases(16.3%) and 6 cases(20.0%). Metastasis rate was 7 cases(8.9%). Although postoperative complications were no remarkable difference in recurrence rates among surgical techniques in this study, other complications such as edema of limbs, necrosis, dehiscence and delayed healing were remarkable difference as surgical techniques. Therefore, this result suggest that choice of appropriate surgical techniques should be determined according to each patient's physical status and characteristics of tumors.