• Journal of radiological science and technology
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• v.27 no.1
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• pp.37-42
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• 2004

2000년 후반부터 국내에 도입된 MDCT는 한번 숨을 참고 검사할 수 있는 volume coverage speed를 향상시킴으로 복부의 검사시간을 단축시켰고 보다 얇은 단면영상획득, isotropic resolution에 의한 reformation의 활용, 다중시기검사, 균일하게 조영된 3차원 혈관영상 획득이 가능해져 미세한 조기 복부암 진단에 주도적 역할을 수행하고 있다. 이에 CT의 기술적 발전과정과 MDCT를 이용한 복부암 진단에 대하여 소개하고자 한다.

• Journal of the Korean Society of Radiology
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• v.13 no.2
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• pp.147-151
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• 2019

In chest and abdomen CT scans, the radiation exposure doses by scattering lines were measured at the eyeball and thyroid. Radiation exposure was investigated by using shielding devices. The chest and abdomen CT scan protocols used in the real examination were applied to measure and compare radiation doses before and after the use of shielding devices at the eyeball and the thyroid. The radiaton doses were measured with OSLD dosimeters. Barium, tungsten sheets, goggles and neck shields were used to protect the scattered X-ray. The chest CT scans showed respectively 3.01 mSv and 6.21 mSv at the eyeball and the thyroid by the scattered X-ray. The abdomen CT scans showed 0.55 mSv and 3.22 mSv for the eyeball and the thyroid respectively. Barium and tungsten sheets had 11% to 13% protection rates at the eyeball and the thyroid for chest CT scan, and 34% to 49% reduction in radiation dose for the abdomen CT scan. Because of the significant radiation dose, which causes cataracts and thyroid cancer by the repeated and continuous radiation exposure, for the chest and the abdomen CT scans, it is required to use shielding devices to reduce radiation dose for examinations.

• Proceedings of the Korea Contents Association Conference
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• 2018.05a
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• pp.59-60
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• 2018

디지털 복부 방사선검사에서 고관전압과 부가필터를 이용한 선량감소가 최근 큰 관심을 받고 있다. 본 연구에서는 복부 방사선 검사에서, 기존 방법(80 kVp without filter)과는 다른 고관전압(92 kVp)과 부가필터(0.1 mm Cu-filter)를 사용하여 적절한 진단학적 영상품질을 유지하면서 상당한 환자 선량을 감소 시켰다. 따라서, 본 연구에 방법을 적절하게 이용하면 진단학적 영상품질을 유지하며 환자선량도 감소하는데 유용하리라 사료된다.

• Journal of radiological science and technology
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• v.28 no.4
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• pp.279-286
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• 2005

Purpose : There are two modalities, those are small bowel series(SBS) and abdominal pelvic computed tomography(CT), for diagnosis of small bowel disease. The aim of this study is to lend radiological technologists who are doing the two modalities assistance in the understanding characteristic of disease by comparing the two results. Meterials and method : 284 patients were examined the two SBS and abdominal pelvic CT together from 1999 to 2003. 250 ml $BaSO_4$ suspension 40 w/v% and 600ml carboxy methyl cellulose 0.5 w/v% were used for SBS. Abdominal Pelvic CT was examined in one hour before taking 450 ml $BaSO_4$ suspension 1.5 w/v%. The CT scan was done in 72 sec after 150 ml contrast media injection. the used protocol was helical mode 5:5 mm pitch 1.375:1, speed 27.50, exposure 120 kv, 240 mA, tube rotation time 0.5 sec. the statistic analysis was conducted with statistical program SPSS 10 version with frequency and crossing analysis. P-value less than 0.05 were considered significant. Results : In the results of SBS, normal findings were 131 patients(46.1%), inflammatory bowel disease(IBD) 64(22.9%), ischemia+ileocolitis+vasculitis 22(7.7%), Obstruction+stricture 21(7.7%) and Others 45(15.9%). In the results of abdominal pelvic CT, normal findings were 103 patients(36.3%), inflammatory bowel disease 65(22.9%), wall thickening+lymphadenopathy 42(14.8%), Fluid collection 17(6%), and Others 57case(20%). The same results of the two were 130patients(45.8%). 30patients(10.6%) of normal finding in SBS were diagnosed as wall thickening+lymphadenopathy and IBD in CT, and 15patients(5.3%) of normal finding in CT were diagnosed as ischemia+ileocolitis+vasculitis, mass and IBD in SBS(p<0.05). Transit time delay was diagnosed in 10patients(3.5%) on only SBS, wall thickening+lymphadenopathy was diagnosed in 20patients(7%) in only CT(p<0.05). Conclusion : We think that proper examination method will be selected in the small bowel disease, if we understand the characteristics of the disease and method.

• Journal of the Korean Society of Radiology
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• v.8 no.7
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• pp.401-408
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• 2014

The purpose of this study is confirmed to usefulness between division exam and combine exam of chest and abdomen according to comparing chest and abdomen radiation dose of division exam and combine exam in CT exam method. This study was conducted on patients who were admitted to the E hospital from July 2013 to March 2014 underwent CT studies for the diagnosis of chest and abdomen disease. In study result, male dose were more higher than female dose according to gender analysis of exposure dose that combine exam effective dose were male $33.10{\pm}2.75mSv$, female $31.66{\pm}3.12mSv$ and chest exam effective dose were male $9.07{\pm}2.62mSv$, female $8.30{\pm}2.18mSv$(p<0.05). And, division exam dose and combine exam dose were similar in gender comparison (p>0.05). And, combine exam effective dose, only chest exam effective dose, only abdomen exam effective dose were more higher than DRL(Diagnostic Reference Level) in comparison of patient exposure dose with DRL (p<0.05). In conclusion, chest-abdomen combine exam dose and division exam dose were similar. The chest-abdomen combine study can be used as follow-up and emergency trauma patients. That study will be reduce exam time and the occurrence risk of side effect of the contrast medium.

• Journal of Veterinary Clinics
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• v.26 no.6
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• pp.655-658
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• 2009

An 11-year-old, female, Maltese dog was presented with abdominal distension and intermittent slight lameness on left hindlimb. Palpable abdominal pain and purulent vaginal discharge were observed on physical examination. Severe leukopenia with toxic change, and azotemia, hyperphosphatemia, and hyponatremia were identified on blood profile. On radiographs and abdominal sonograms, remarkable soft tissue mass containing echogenic material deviating intestines craniodorsally compatible with pyometra. On stifle radiographs, 4-5 fragmented sesamoid bone (fabella) was identified on both stifle joint with medial patella luxation. Immediate ovariohysterectomy was performed and the patient was recovered well with normal blood work. No specific treatment was attempted to the left hindlimb showing minimal and intermittent lameness. No remarkable abnormal gait was reported for 3-month follow-up period. The fragmented lateral fabella is considered congenital multipartite of lateral fabella not related to the lameness.

• Journal of the Korean Society of Radiology
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• v.12 no.7
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• pp.821-826
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• 2018

This study was performed randomly from all the patients who visited the University Hospital in Gyeonggi-do from January 1, 2018 to June 30, 2018 for the abdominal CT scan. We divided the patients into three groups and evaluated the extent of effective dose and image quality according to the area of the abdominal CT image. As a result, the effective dose was 7.34 mSv in the average area group, 8.39 mSv in the average area and 5.89 mSv in the average area. For the analysis of image quality, ROI was plotted in the same three regions according to the abdominal area. As a result, CT values were significantly different in the abdominal area classified into 3 groups (p <0.05). The results of this study can be used as a basic data for the development of a protocol that can be applied in actual clinical practice. It is thought that it can help to reduce the image quality and the radiation dose.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.06a
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• pp.40-43
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• 2017

본 논문은 딥러닝을 이용하여 대장통과시간(Colon Transit Time, CTT) 검사를 위한 단순복부 X-Ray 영상에서 방사선 비투과성 표지자(Radio-opaque Marker)를 자동으로 검출하는 기법을 제시한다. 대장통과시간 검사는 대장의 운동질환을 평가하는데 있어 가장 기본적인 방법으로 특히 만성 변비증 환자의 병태생리에 따른 유형 분류와 치료 계획을 설정하는데 큰 도움을 주고 있으며, 내과적 또는 외과적 치료 후 평가에도 유용한 검사이다. 대장통과시간 검사는 방사선 비투과성 표지자가 내재되어 있는 캡슐을 복용한 뒤 주기적으로 단순복부 X-Ray 촬영을 통해 구간별로 남아있는 표지자의 수를 세고, 이를 통해 구역별 통과시간을 측정한다. 이 과정에서 판독의가 직접 표지자의 위치 및 개수를 세기 때문에 많은 시간이 필요하게 된다. 따라선 본 논문에서는 이러한 단점을 보완하기 위해 딥러닝 기법을 사용하여 X-Ray 영상 내에서 표지자의 위치를 자동 파악하는 기법을 제시한다.

• The Journal of the Korea Contents Association
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• v.11 no.6
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• pp.252-259
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• 2011

This study was to find out the correlation between abdominal surface temperature and abdominal fat areas. CT and MRI methods have been used to assess abdominal fat area. Abdominal surface temperature according to abdominal fat area was also measured by DITI. 20 college students were selected as the subjects for the study. The results, showed that there were statistically different significance in abdominal fats measured by CT and MRI according to weight groups. Abdominal surface temperature gap were measured by DITI and there was a statistically significant difference in only T12 region. temperature gaps between weight groups were over $0.7^{\circ}C$. In conclusion, CT method is the most accurate method to measure abdominal fat. However, weak points are radiation exposure and high cost for study. The correlation between abdominal surface temperature and abdominal fat areas were strong. Therefore, DITI may be considered as useful convenient method to evaluate the abdominal obesity and clinical usefulness.

• Journal of radiological science and technology
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• v.26 no.2
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• pp.43-47
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• 2003

Colorectal cancer produce focal mass or segmental thickening which can be detected with sonography. The purpose of this study was to describe sonographic findings of colorectal cancer. we reviewed sonograms of 51 patients with colorectal cancer in whom sonography was performed before colon study. In 51 patients who had more common coloretal cancer 27cases(53%) had 40 to 50 years of age(60%). Sonographic findings included segmental thickening 42cases, or irregular mass 9 cases. With careful examination, these findings can be detectable, and therefore bowel should be carefully examination in patients with sign and symptoms suggesting carcinoma of the colon and rectum.