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남경진,추기석 대한영상의학회 2013 대한영상의학회지 Vol.68 No.4
Coronary to bronchial artery fistula is a rare vascular anomaly secondary to enlargement of pre-existing vascular anastomosis between the coronary and bronchial arteries. This occurs when there is a constant disturbance of the pressure equilibrium involving either coronary or broncho-pulmonary disorder. Localized bronchiectasis is the most common related condition in patients with a coronary to bronchial artery fistula. Herein, we report on a case of a large left circumflex coronary artery to right bronchial artery fistula associated with bronchiectasis.
박정환,추기석,전웅배,백승국,김용우,김태언,김창원,정동욱,임수진 대한영상의학회 2014 대한영상의학회지 Vol.71 No.3
Purpose: The objective of this study is to compare image quality and radiation dose of high pitch (3) CT angiography (CTA) with 128-slice dual-source CT in lower extremity arteries with that of low pitch (0.6) CTA. Materials and Methods: A total of 136 patients were divided into two groups; high pitch (3) group included 67 patients and low pitch (0.6) group included 69 patients. For quantitative analysis, we calculated the mean arterial attenuation, mean coefficient variation of arterial attenuations, mean contrast-to-noise ratio, mean figure of merit (FOM), and mean standard deviation of CT density of muscle. In addition, visual scores were used for qualitative evaluation, and radiation doses were reported in the two groups. Results: The mean dose-length product was decreased by 31% at high pitch (409.49 ± 37.71 mGy·cm vs. 592.98 ± 59.69 mGy·cm), and the mean volume CT dose index was also significantly decreased at high pitch (2.91 ± 0.14 mGy vs. 4.70 ± 0.30 mGy). However, other quantitative analysis showed no significant intergroup differences, except in mean FOM. Visual scores showed no significant intergroup difference. Conclusion: Despite changing the pitch from 0.6 to 3, the image quality of CTA was not degraded and radiation dose was reduced by 31%.
김도경,추기석,김성장,배영태,이상협 대한영상의학회 2010 대한영상의학회지 Vol.62 No.5
Purpose: To identify radio-clinico-pathologic factors that result in false negative FDG uptake on 18F-FDG -PET/CT in the diagnosis of breast cancer. Materials and Methods: We retrospectively reviewed a total of 140 breast lesions in 140 patients (mean age: 51.3 years) who underwent PET/CT for the staging of breast cancer from May 2007 to January 2008. All patients were divided as false negative (group 1, n=20) or true positive (group 2, n=120). A retrospective analysis was performed to analyze the statistical differences in clinico-pathologic factors between groups 1 and 2 using the Mann-Whitney U test, as well as the stepwise logistic regression analysis and the Chi-squared or Fisher’s exact test. Results: Estrogen receptor positivity, mass on mammography, carcinoma in situ, and size were significantly different between groups 1 and 2 (p < 0.05). A stepwise logistic regression analysis showed that the estrogen receptor positivity (odds ratio, 5.623; 95% confidence interval: 1.100, 28.746; p = 0.021) and carcinoma in situ (odds ratio, 6.900; 95% confidence interval: 1.151, 41.361; p = 0.026) were significant clinico-pathology variables associated with false negative PET/CT findings. Conclusion: Estrogen receptor positivity and carcinoma in situ may be helpful in the possible explanation of false negative PET/CT results in the diagnosis of breast cancer.
이유진,추기석,배영태,김지연 대한영상의학회 2010 대한영상의학회지 Vol.63 No.6
Sparganosis of the breast is a quite rare parasitic infection of humans and presents as soft tissue masses that mimic breast malignancy or benign tumor, such as fibroadenoma. We present here a case of histologically confirmed breast sparganosis in the upper inner quadrant of the right breast with coexisting breast cancer in the ipsilateral breast upper outer quadrant. Ultrasonography of breast sparganosis showed a well defined, tubular hypoechoic mass with discrete multilayered wall and tubule-in tubule appearance, surrounded by heterogenous hyperechoic areas in the subcutaneous fat layer of the breast. MRI revealed an elongated tubular structure with persistent and progressive enhancement. This is the second report concerned with the MRI and ultrasonographic findings of breast sparganosis and the first report of breast sparganosis in a patient with ipsilateral breast cancer.
임수진,추기석 대한심장학회 2007 Korean Circulation Journal Vol.37 No.5
MDCT has recently been used as a diagnostic tool to evaluate coronary artery stenosis and to detect coronary arteryanomalies. The accuracy of MDCT has improved the assessment of stenosis as the number of detectors has increased.In addition to its excellent role in evaluating coronary artery stenosis, MDCT can provide information regardingthe left ventricular function without having to perform additional scanning, and the myocardial viability of theleft ventricle can be assessed on a delayed scan. MDCT has several disadvantages such as the amount of radiationexposure and the use of an iodine contrast medium, which might cause an adverse reaction, when combined withthe reconstruction of the systolic and diastolic phases and the delayed scan. Yet MDCT may provide the opportunityto evaluate the coronary anatomy, the left ventricular function and the tissue characterization in one singleimaging session that lasts less than 15 minutes. (Korean Circulation J 2007;37:191-195)
비전형적 흉통을 가진 환자를 평가하는데 있어 저선량 흉부 CT를 포함한 CT 관상동맥 조영술의 임상적 유용성: 예비보고서
임수진,추기석,김창원,김건일,정연주,김준홍,이한철,전국진,김준,전웅배 대한영상의학회 2008 대한영상의학회지 Vol.58 No.4
목적: 비전형적 흉통이 있는 환자를 평가하는데 있어 저선량 흉부 CT를 포함한 CT 관상동맥 조영술의 임상적 유용성을 알아보고자 하였다. 대상과 방법: 총 96명의 비전형적 흉통을 호소하는 환자(평균 연령 60.2세, 남자 70명, 여자 26명)를 대상으로 저선량 흉부 CT를 포함한 CT 관상동맥 조영술을 시행하였다. CT 관상동맥 조영술에서 50% 이상의 의미 있는 관상동맥 내경 협착이 있는 경우에는, 고식적 관상동맥 조영술을 시행하였다. 모든 환자들에게 있어서, CT 검사 시행 6개월 후 병력지 및 전화 설문으로 흉통의 지속 여부 및 CT 검사로 밝혀진 흉통의 원인 외에 흉통의 다른 원인이 있는지 알아보았다. 결과: CT 관상동맥 조영술에서 7명의 환자가 의미 있는 관상동맥의 협착이 있었고, 이중 2명의 환자에서 의미 있는 관상동맥의 협착이 고식적 관상동맥 조영술에서 확인되었다. CT 관상동맥 조영술에서 의미 있는 협착이 없던 환자 89명 중 18명(19%)이 이러한 프로토콜에서 폐질환, 흉막질환으로 진단되었다. 결론: 비전형적 흉통이 있는 환자를 평가하는데 있어서, 저선량 흉부 CT를 포함한 CT 관상동맥 조영술은 허혈성 심질환을 비침습적으로 배제할 수 있을 뿐만 아니라 흉통의 원인이 될 수 있는 폐질환 및 흉막질환들을 진단하는데 도움을 줄 수 있다.
백현정,추기석,남경진,황재연,이지원,김진유,정혁재 대한영상의학회 2018 대한영상의학회지 Vol.78 No.4
Purpose: To compare image qualities of 80 kVp CT venography (CTV) and 120 kVp CTV by model-based iterative reconstruction (MBIR) at the same radiation dose. Materials and Methods: Sixty-nine patients that underwent CTV using 80 kVp (36 patients, group 1) or 120 kVp (33 patients, group 2) with MBIR at the same radiation dose were enrolled, and objective and subjective image qualities were assessed independently by two radiologists. Results: Mean vascular enhancement and contrast-to-noise ratio were significantly higher in group 1 than in group 2 for inferior vena cavas, femoral veins, and popliteal veins (p < 0.001), and there was significantly lower objective image noise in group 1 (p < 0.001). Subjective analysis revealed image quality was significantly higher in group 1 and image noise was significantly higher in group 2 (p < 0.001). Mean dose-length products was not significantly lower in group 1 (356.1 ± 153.7 mGy cm) than in group 2 (370.1 ± 77.1 mGy cm) (p = 0.635). Conclusion: CTV at 80 kVp with MBIR is a better protocol than CTV at 120 kVp with MBIR at the same radiation dose.