방사선과 학생의 임상실습 만족도에 관한 연구

김학성(Hark Sung Kim) 대한방사선과학회(구 대한방사선기술학회) 2004 방사선기술과학 Vol.27 No.4

방사선과 학생의 임상실습 만족도에 관한 조사연구 목적은 임상실습을 더욱 효율적으로 시행하기 위해 기초조사 자료를 제공하는데 있다. 수도권에 소재한 대학에 재학 중인 방사선과 학생 227명을 조사 대상으로 2004년 1월부터 2월까지 임상실습 만족에 관한 항목을 8개 항목으로 나누어 설문조사하여 SPSS/PC+ 통계프로그램으로 분석하였다. 1. 설문조사 8개 항목의 평균점수는 3.64이고, 임상실습 내용에 대한 만족도는 4.00, 임상실습 분야별 만족도는 3.64, 임상실습시간에 대한 만족도는 3.69, 임상실습 후 만족도는 3.88, 임상실습 후 대인 관계에 대한 만족도는 3.72, 임상실습평가에 대한 만족도는 3.21, 임상실습지도에 대한 만족도는 3.37, 임상실습 환경에 대한 만족도는 3.57로 나타났다. 2. 임상실습 시기는 대부분 3학년 1학기, 3학년 여름방학 또는 3학년 2학기에 시행하고 있으며, 학생들의 의견은 3학년 1학기 또는 2학년 겨올방학을 선호한 것으로 나타나 대학의 교과과정에 따라 차이가 있을 수 있기에 합리적인 임상실습 시기를 선택해야겠다. 3. 실습평가에 있어서 보다 객관적이고 타당성 있는 평가기준과 폭넓게 활용할 수 있는 표준화될 실습교재 개발이 시급히 필요하며, 대학교수는 병원횟수를 좀 더 늘려 학생들의 임상실습에 관심을 가져야겠다. The objective of till study is to find out the factors affecting the satisfaction of the students at the department of radiotechnology of health college for their clinical practice and provide the basic data necessary for the better planning of the curriculum for the clinical practice. The questions were distributed to and collected from 227 junior college students in Seoul and Kyeonggido from January to February, 2004 All statistical analyses were carried out using SPSS/PC+ The general characteristics of students and the current clinical practice conditions were presented in real numbers and percentages. The responding scores for the degree of satisfaction vary from 1 to 5, where is thc worst score and 5 the best The degree of satisfaction for clinical practice was presented as the average score and the standard deviation for each item shown. 1 The degree of satisfaction for the clinical practice was assessed in total eight aspects and the overall average score was 3 64°. The degree of satisfaction for practice period was scored 3 69, which was higher than the average. Environmental aspect was scored 3.57, suggesting relatively low satisfaction The degree of satisfaction for parts, evaluation method of clinical practice, education, practice contents, achievement after clinical practice, and personal relationship in practice were presented 3.64, 3.21, 3.37, 4.00, 3.88, and 3.72 respectively. The degree of evaluation method of clinical practice was the lowest among them. 2 The students favored the clinical practice course offered in the second semester of their third year and a total of 8 weeks for the period 3 The major complaints or the students during the clinical practice were simple works, insufficient rest place and conflict with practice teachers. As mentioned above, the degree of satisfaction for the achievement after clinical practice and item necessary for clinical practice showed relatively high scores. It turns out that the students think of their clinical practice as very positive in answering the questionnaire.

A Study on Establishment of Essential Performance Evaluation Criteria for C-arm Computed Tomography

김은혜(Eun-Hye Kim),박혜민(Hye-Min Park),김정민(Jung-Min Kim) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

In order to overcome the image quality limitations of the conventional C-arm, a flat panel detector (FPD) is used to enhance spatial resolution, detective quantum efficiency, frame rate, and dynamic range. Three-dimensional (3D) visualized information can be obtained from C-arm computed tomography (CT) equipped with an FPD, which can reduce patient discomfort and provide various medical information to health care providers by conducting procedures in the interventional procedure room without moving the patient to the CT scan room. Unlike a conventional C-arm device, a C-arm CT requires different basic safety and essential performance evaluation criteria; therefore, in this study, basic safety and essential performance evaluation criteria to protect patients, medical staff, and radiologists were derived based on International Electrotechnical Commission (IEC) standards, the Ministry of Food and Drug Safety (MFDS) standards in Korea, and the rules on the installation and operation of special medical equipment in Korea. As a result of the study, six basic safety evaluation criteria related to electrical and mechanical radiation safety (leakage current, collision protection, emergency stopping device, overheating, recovery management, and ingress of water or particulate matter into medical electrical (ME) equipment and ME systems: footswitches) and 14 essential performance evaluation criteria (accuracy of tube voltage, accuracy of tube current, accuracy of loading time, accuracy of current time product, reproducibility of radiation output, linearity and consistency in radiography, half layer value in X-ray equipment, focal size and collimator, relationship between X-ray field and image reception area, consistency of light irradiation versus X-ray irradiation, performance of the mechanical device, focal spot to skin distance accuracy, image quality evaluation, and technical characteristic of cone-beam computed tomography) were selected for a total of 20 criteria.

레이저 투과 선량에 따른 황색포도상구균의 광역학적 비활성화

구본열(Bon-Yeoul Koo),김지원(Ji-Won Kim) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

Staphylococcus aureus is a major pathogen that causes clinical infections in humans and can also cause massively colonized in lesion skin, particularly in atopic dermatitis patients. This study investigated the effects of photodynamic inactivation with radachlorin and diode laser irradiation on the viability of S. aureus in vitro and assessed the effects of the dose of laser transmission. In the PDI group, 5 μL of S. aureus suspension and 5 μL of radachlorin were inoculated in a 55 mm petri dish (63.6 cm2). The samples were placed in a 37° incubator for 30 min and then irradiated with light (660 nm diode laser). After laser irradiation, the cells were stored for 24 h at 37° in an incubator with 5% CO2, and the number of colonies was counted. All CFU/mL of S. aureus were reduced by diode laser in the presence of radachlorin, with a killing rate of 87.9% at an energy dose of 9 J/cm2. This study contribute to treat colonized with S. aureus in atopic dermatitis patients and wound infections by providing information on the optimal dose of laser transmission using PDI to eliminate S. aureus.

척추 신경 차단술 환자 특성이 주사시술의 공포감과 방사선의 위험 인식에 미치는 영향

차진영(Jin-Young Cha),성열훈(Youl-Hun Seoung) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

The purpose of this study was to investigate the effect of the characteristics of patients who underwent spinal nerve block on the fear of injection and the risk of radiation. Subjects were 137 patients (67 males, 70 females) who visited the Department of Anesthesiology and Pain Medicine in Cheongju. The method was conducted as a research study using a total of 28 questionnaires consisting of patient characteristics, experience characteristics of nerve block surgery, nerve block fear scale, and radiation risk perception scale. The reliability of the questionnaire response was secured with a Cronbach s alpha coefficient of 0.6 or higher. For statistical analysis, correlation was tested by descriptive statistics, frequency analysis, independent sample T-test, and Pearson and Spearman correlation coefficients by measurement scale and factor. As a result, the fear scale of nerve block was significantly higher in women than in men (p<0.05). The fear scale of nerve block injection was significantly higher in the first-visit patients than in the second-visited patients (p<0.05). However, there was no significant difference among all variables in radiation risk perception. In conclusion, patients undergoing spinal nerve block were more aware of the fear of injection than the risk of radiation exposure during the procedure.

유방엑스선검사에서의 변형된 ACR 팬텀 제작을 통한 모조병소의 위치와 두께 변화에 따른 영상의 품질 평가

엄현자(Hyon-Ja Uhm),박찬록(Chanrok Park) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

To maintain improved image quality in mammography, the quality control process is performed using the ACR (American college of radiology) phantom. In addition, many studied were performed by fabricating the customized breast phantom to provide more information in mammography. Thus, the purpose of this study was to evaluate the image quality by designing the modified ACR phantoms. The five modified acrlylic ACR phantoms were designed by considering insert position and phantom thickness. The phantoms were consisted of 4.5, 3.0, and 1.5 cm in terms of phantom thickness, and 3.0, 2.0, and 0.5 cm in terms of insert position, respectively. The acquired images were evaluated by PSNR (peak signal to noise ratio), RMSE (root mean square error), CC (correlation coefficient), CNR (contrast to noise ratio), and COV (coefficient of variation). Based on the similarity analysis, the result is suitable between conventional and new designed phantoms. In addition, the CNR and COV results in terms of insert position showed that image quality for 0.5 cm was 2.3 and 27.4% improved compared with 2 and 3 cm, respectively. According to phantom thickness results, the CNR result for 1.5 cm and COV result for 4.5 cm were 50.1 and 62.7% improved compared with that those conditions. In conclusion, we confirmed that the image quality depends on the breast size and thickness through modified ACR phantom study.

게이트심장혈액풀검사에서 딥러닝 기반 좌심실 영역 분할방법의 유용성 평가

오주영(Joo-Young Oh),정의환(Eui-Hwan Jeong),이주영(Joo-Young Lee),박훈희(Hoon-Hee Park) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

The Cardiac Gated Blood Pool (GBP) scintigram, a nuclear medicine imaging, calculates the left ventricular Ejection Fraction (EF) by segmenting the left ventricle from the heart. However, in order to accurately segment the substructure of the heart, specialized knowledge of cardiac anatomy is required, and depending on the expert s processing, there may be a problem in which the left ventricular EF is calculated differently. In this study, using the DeepLabV3 architecture, GBP images were trained on 93 training data with a ResNet-50 backbone. Afterwards, the trained model was applied to 23 separate test sets of GBP to evaluate the reproducibility of the region of interest and left ventricular EF. Pixel accuracy, dice coefficient, and IoU for the region of interest were 99.32±0.20, 94.65±1.45, 89.89±2.62(%) at the diastolic phase, and 99.26±0.34, 90.16±4.19, and 82.33±6.69(%) at the systolic phase, respectively. Left ventricular EF was calculated to be an average of 60.37±7.32% in the ROI set by humans and 58.68±7.22% in the ROI set by the deep learning segmentation model. (p<0.05) The automated segmentation method using deep learning presented in this study similarly predicts the average human-set ROI and left ventricular EF when a random GBP image is an input. If the automatic segmentation method is developed and applied to the functional examination method that needs to set ROI in the field of cardiac scintigram in nuclear medicine in the future, it is expected to greatly contribute to improving the efficiency and accuracy of processing and analysis by nuclear medicine specialists.

Analysis on Optimal Approach of Blind Deconvolution Algorithm in Chest CT Imaging

이영준(Young-Jun Lee),민정환(Jung-Whan Min) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

The main purpose of this work was to restore the blurry chest CT images by applying a blind deconvolution algorithm. In general, image restoration is the procedure of improving the degraded image to get the true or original image. In this regard, we focused on a blind deblurring approach with chest CT imaging by using digital image processing in MATLAB, which the blind deconvolution technique performed without any whole knowledge or information as to the fundamental point spread function (PSF). For our approach, we acquired 30 chest CT images from the public source and applied three type’s PSFs for finding the true image and the original PSF. The observed image might be convolved with an isotropic gaussian PSF or motion blurring PSF and the original image. The PSFs are assumed as a black box, hence restoring the image is called blind deconvolution. For the 30 iteration times, we analyzed diverse sizes of the PSF and tried to approximate the true PSF and the original image. For improving the ringing effect, we employed the weighted function by using the sobel filter. The results was compared with the three criteria including mean squared error (MSE), root mean squared error (RMSE) and peak signal-to-noise ratio (PSNR), which all values of the optimal-sized image outperformed those that the other reconstructed two-sized images. Therefore, we improved the blurring chest CT image by using the blind deconvolutin algorithm for optimal approach.

원자력안전법에 대한 방사선학과 학생들의 학습권 보장에 관한 연구

이보우(Bo-Woo Lee) 대한방사선과학회(구 대한방사선기술학회) 2022 방사선기술과학 Vol.45 No.2

The study developed a radiation dose measurement program in the radiology laboratory to measure how much exposure the students are exposed to during the radiology class, to request for the improvement and the revision of the current Nuclear Safety Act. The experimental program is shown in the following figure, and experiments were conducted to determine the degree of radiation exposure in the control room with a lead gown at a distance of 1 m, 2 m, and 1 m, and in a control room with a radiographic lead glass wall. The duration of the experiment was 3 months from April to June, when radiation imaging practice classes were conducted, and 128 hours of imaging practice per month were conducted. In order to find out the dose of radiation dose during radiology imaging practice class, the experiment was carried out from April to June for 3 months, and according to the program, the results of exposure dose were 0.34 mSv at 1 m distance, 0.01 mSv at shielding of lead gown at 1 m distance, 0.16 mSv at 2 m distance, and 0.01 mSv at control room with radiation lead glass wall. The exposure dose from the test results was much below the annual general public limit dose of 1 mSv. The restriction on the operation of the radiation equipment in the practice of the students is a regulation that infringes the right of students to learn, and amendments or exemptions of Nuclear Safety Act should be enacted to ensure that it does not violate the fundamental right to learn for students in radiology.

방사선과 대학생의 감성지능이 자아존중감에 미치는 영향

김형태(Hyeong-Tae Kim) 대한방사선과학회(구 대한방사선기술학회) 2011 방사선기술과학 Vol.34 No.3

복잡한 사회의 정보와 혼란 속에 청소년들의 자기인식과 자기실현을 위하여 중요한 심리, 성격적 요인이라고 할 수 있는 요인 중 하나가 자아존중감(Self-Esteem)이다. 이에 본 연구는 전국의 방사선과 대학생들을 편의추출하여 방사선과 대학생들의 일반적 특성 중 자아존중감에 미치는 요인을 찾아보고 또 감성지능이 자아존 중감에 미치는 요인을 찾아봄으로써, 방사선과 학생을 지도하고 가르치는 환경과 방향을 제언하고자 한다. 연구결과 일반특성에서는 연령은 전반적 자아존중감에, 성별과 성적은 사회적 자아존중감에, 건강은 전반적 자아존중감, 사회적 자아존중감, 가정에서 자아존중감에 유의한 영향을 미치는 것으로 나타났다. 감성지능은 타인감성이해가 전반적 자아존중감에 미치는 영향을 제외하고 모두 유의하게 영향을 미치는 것으로 나타났다. In informational confusion of complicated society, self-esteem is considered as important psychological and temperamental factors for self-recognition and self-realization of youths. In this study, we found factors that affect self-esteem by investigating general characteristics and emotional intelligence of college student majoring in Radiological Science. The results showed that, in terms of general characteristics, age affects overall self-esteem, sex and school record affect a social self-esteem, and health affects self-esteem within the family as well as overall and social self-esteem.

방사선과 보건의료서비스에 대한 방사선사와 환자의 인식차이 및 개선방향 - 인천지역을 중심으로

안성민(Sung-Min An),김성철(Sung-Chul Kim) 대한방사선과학회(구 대한방사선기술학회) 2006 방사선기술과학 Vol.29 No.2

  방사선과의 의료 서비스에 대한 환자의 만족도 평가 및 방사선사와 환자간의 인식차를 평가하여 방사선과 의료 서비스의 개선방향에 대해 알아보았다.<BR>  그 결과 대부분의 설문결과에“보통이다”이상의 답변을 하였으며, 부족한 부분으로는“접수수속의 복잡함, 검사 대기시간이 긴 점 및 환자 보호자의 방사선차폐 미실시”를 들었다. 또한 이 항목들은 환자뿐 아니라 방사선사들도 인식을 하고 있는 부분으로 환자에 대한 적극적인 배려가 필요하다고 사료된다. 그리고 방사선사와 환자의 인식차를 줄이기 위해서는 서비스를 제공하는 방사선사의 노력이 가장 필요하며, 이를 위해서는 정기적으로 환자관점에서의 의료서비스 만족도 조사를 통해 환자가 느끼는 서비스의 품질수준을 평가하고 만족도가 낮은 사항에 대해서는 만족도를 높이기 위한 개선책 마련에 힘써야 할 것이다.   Satisfaction of the patient against the medical service in department of radiology and it evaluated the different recognition of radiological technologist and patient. and investigates it"s improvement direction.<BR>  It sent the reply the above the which is a usual result in question result of the most that, the receipt process it was complicated in the portion which is insufficient,“The receipt process is complicated”, “waiting time is long”and “don"t radiation protection for patient and guardian”.<BR>  Also these a facts was recognizing patients and radiological technologist all.<BR>  And the effort of the radiological technologist is necessary with the method which reduces a recognition difference.<BR>  The periodical medical service satisfaction investigates and must endeavor in reform measure preparation.