• Korean Journal of Radiology
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• 제1권4호
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• pp.219-222
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• 2000

Renal inflammatory pseudotumor is a very rare benign condition of unknown etiology characterized by proliferative myofibroblasts, fibroblasts, histiocytes, and plasma cells. In the case we report, the lesion appeared on contrast-enhanced power Doppler US images as a well-defined hypoechoic mass with intratumoral vascularity, and on CT as a low-attenuated mass. Differentiation from malignant renal neoplasms was not possible.

• Journal of Trauma and Injury
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• 제34권4호
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• pp.294-298
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• 2021

Extrahepatic biliary tract and gallbladder injuries following blunt abdominal trauma are uncommon. Traumatic cystic duct transection is even rarer, which has frequently caused missed diagnosis and delayed treatment. An 18-year-old female patient with no past medical history was transferred to the Trauma Center of Kyungpook National University Hospital after falling from a height of approximately 20 meters. She became hemodynamically stable after initial resuscitation, and initial contrast-enhanced abdominal computed tomography (CT) showed right kidney traumatic infarction and multiple intrahepatic contusions with minimal fluid collection but no extravasation of the contrast. She was admitted to the intensive care unit. On the second day of hospitalization, her abdomen became distended, with follow-up CT showing a large collection of intra-abdominal fluid. Laparoscopic exploration was then performed, which revealed devascularization of the gallbladder with complete transection of the cystic duct and artery. Laparoscopic cholecystectomy was performed, as well as primary closure of the cystic duct orifice on the common bile duct using a 4-0 Prolene suture. After surgery, no clinical evidence of biliary leakage or common bile duct stricture was observed.

• Journal of Veterinary Science
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• 제24권5호
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• pp.65.1-65.9
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• 2023

Background: Bone subtraction computed tomography angiography (BSCTA) is a useful alternative technique for improving visualization of vessels surrounded by skull bone. However, no studies have compared computed tomography angiography (CTA) and BSCTA for improving the visibility of canine cerebral blood vessels. Objectives: To evaluate the potential benefit of BSCTA for better delineation of brain arteries of the circle of Willis (CoW) in dogs by comparing BSCTA with non-subtraction computed tomography angiography (NSCTA). Methods: Brain CTA was performed for nine healthy beagle dogs using a bolus tracking method with saline flushing. A total dose of 600 mgI/kg of contrast agent with an iodine content of 370 mgI/mL was injected at a rate of 4 ml/s. Bone removal was achieved automatically by subtracting non-enhanced computed tomography (CT) data from contrast CT data. Five main intracranial arteries of the CoW were analyzed and graded on a scale of five for qualitative evaluation. Results: Scores of basilar artery, middle cerebral artery, and rostral cerebral artery in the BSCTA group were significantly higher than those in the NSCTA group (p = 0.001, p = 0.020, and p < 0.0001, respectively). Scores of rostral cerebellar artery (RcA) and caudal cerebral artery (CCA) did not differ significantly between the two groups. However, scores of RcA and CCA in the BSCTA group were higher than those in the NSCTA group. Conclusions: BSCTA improved visualization of intracranial arteries of the CoW with close contact to bone. Thus, it should be recommended as a routine scan method in dogs suspected of having brain vessel disease.

• 한국임상수의학회지
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• 제27권6호
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• pp.686-692
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• 2010

컴퓨터 단층촬영술(computed tomography; CT)은 인의에서 췌장염의 진단 기준으로 이용되고 있으며, Balthazar CT severity index (CTSI)는 CT 영상을 바탕으로 췌장 괴사 부위를 측정하여 췌장염의 심각도를 평가하는 지수이다. 본 연구에서는, 25마리의 비글견을 정상 그룹과 대조군, 자가 담즙 주입을 통해 급성 괴사성 췌장염을 유발한 실험군으로 나누어 Balthazar CTSI 측정 결과와 조직 검사 결과를 비교하였다. 정상 개의 췌장의 Hounsfield unit (HU)은 $52.44{\pm}4.58$ 이었고, 급성 괴사성 췌장염에서는 유의적으로 감소하였다(P < .05). 조영 증강 CT 영상에서 확인한 췌장 실질의 괴사 부위를 찾아 Balthazar CTSI를 계산한 결과 조직 검사 결과와 밀접한 상관 관계를 보였으며, 민감도 100%, 특이도 88.89%로 확인되었다. Balthazar CTSI는 급성 췌장염이 발생한 개에서 심각도 평가에 유용한 방법으로 판단된다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권9호
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• pp.4003-4006
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• 2015

Objecive: To investigate the clinical safety and efficacy of CT-guided $^{125}iodine$ (125I) seed implantation combined with percutaneous intra-tumor injection of chemotherapy emulsion of lobaplatin and lipiodol in treating patients with advanced lung cancer. Materials and Methods: Patients with advanced lung cancer and treated with spiral CT-guided $^{125}I$ seed implantation combined with percutaneous intra-tumor injection of chemotherapy emulsion of lobaplatin and lipiodol were recruited. Results: Of the 36 patients, there were 40 nidi in total. The contrast-enhanced CT evaluation was conducted 60 d after treatment. Response evaluation suggested that 4 patients achieved complete remission (CR), 24 partial remission (PR), 4 stable disease (SD) and 4 progression disease (PD), with a total response rate of 77.8% (28/36). Conclusions: CT-guided $^{125}I$ seed implantation combined with percutaneous intra-tumor injection of chemotherapy emulsion of lobaplatin and lipiodol are safe and effective in treating patients with advanced lung cancer.

• 대한영상의학회지
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• 제81권5호
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• pp.1227-1233
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• 2020

윤활막육종은 주로 사지, 특히 무릎 근처에 발생하는 악성 연부조직 종양으로, 가슴벽에 발생한 경우는 매우 드물다. 저자들은 26세 여성에서 앞가슴벽에 발생한 윤활막육종의 증례를 CT 및 MRI 소견을 중심으로 보고하고자 한다. CT에서 흉막하에 위치한, 경계가 좋으며 석회화를 동반한 작은 종괴로 관찰되어, 처음에는 양성 종양으로 생각하였다. 하지만 갑자기 심한 통증과 함께 종괴의 출혈과 혈흉이 동반되어 악성의 가능성을 고려하였다. MRI에서는 다엽성 종괴 내부에 액체액체층이 보였고, 이는 윤활막육종의 특징적인 영상 소견이다.

• Journal of Trauma and Injury
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• 제20권1호
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• pp.52-56
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• 2007

Marjolin's ulcer is a rare and often-aggressive cutaneous malignancy that arises in previously traumatized or chronically inflamed skin, particularly after burns. We experienced two cases after burns. Case I involved a forty eight year-old man who had suffered from a flame burn at the parietal scalp area, where had been initially described three years earlier as a full-thickness wound including the pericranium. The man consulted us for a persistent ulcerative and infected wound on the burned lesion during the last 24 months, which turned out on the contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI) to be the squamous cell carcinoma with involving the skull and the dura mater. Although the posterior auricular lymph node was enlarged on the ipsilateral side, recent positron emission tomography (PET) CT did not show any metastatic lesion. It was impossible for us to resect the intracranial involvement of the tumor radically, and the postoperative PET CT still showed a focal fluorodeoxyglucose (FDG) uptake around the wall of the superior sagittal sinus. We think that an aggressive combined approach is essential for treatment in early stages for a high success rate, before the intracranial structures are involved because there is no consensus on the treatment for advanced disease, and the results are generally poor. Case 1 also did not involve a radical resection because of the intracranial invasion to the wall of superior sagittal sinus and the possibility of damage to the major cortical veins. He received adjuvant radiotherapy and must be followed periodically. Case 2 involved an eighty six year-old women who suffered from a painful scalp ulcer lesion after flame burns three years earlier. Unlike case 1, neither tumor infiltration into the dura nor lymph node enlargement was observed on the contrast-enhanced computed tomography (CT), magnetic resonance imaging (MRI), or positron emission tomography (PET) CT. We did a radical resection of the tumor, including the involved bone, and a cranioplasty with bone cement.

• Korean Journal of Radiology
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• 제21권12호
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• pp.1355-1366
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• 2020

Objective: We aimed to evaluate the diagnostic value and prognostic relevance of FDG positron emission tomography/computed tomography (PET-CT) in extrahepatic cholangiocarcinoma patients. Materials and Methods: This study included 234 extrahepatic cholangiocarcinoma patients who underwent FDG PET-CT between June 2008 and February 2016. The diagnostic performance of FDG PEG-CT was compared to that of contrast-enhanced multidetector row CT (MDCT) and MRI. Independent prognosticators for poor survival were also assessed. Results: The sensitivity of FDG PET-CT for detecting primary tumor and regional lymph node metastases was lower than that of MDCT or MRI (p < 0.001), whereas the specificity and positive predictive value for detecting regional lymph nodes metastases was significantly better in FDG PET-CT compared to MDCT and MRI (all p < 0.001). There was no significant difference in the diagnostic yield of distant metastases detection among three diagnostic imaging techniques. In a multivariate analysis, maximum standardized uptake values (SUV_max) of the primary tumor (adjusted hazard ratio [HR], 1.75; 95% confidence interval [CI], 1.13-2.69) and of the metastatic lesions ≥ 5 (adjusted HR, 8.10; 95% CI, 1.96-33.5) were independent contributors to poor overall survival in extrahepatic cholangiocarcinoma patients. In a subgroup analysis of 187 patients with periductal infiltrating type of cholangiocarcinoma, an SUV_max of the primary tumor ≥ 5 was associated with an increased risk of regional lymph node (adjusted odds ratio [OR], 1.60; 95% CI, 0.55-4.63) and distant metastases (adjusted OR, 100.57; 95% CI, 3.94-2567.43) at diagnosis as well as with poor overall survival (adjusted HR, 1.81; 95% CI, 1.04-3.15). Conclusion: FDG PET-CT showed lower sensitivity for detecting primary tumor and regional lymph node involvement than MDCT and MRI. However, the SUV_max of primary tumors and metastatic lesions derived from FDG PET-CT could have significant implications for predicting prognoses in extrahepatic cholangiocarcinoma patients.

• 한국임상수의학회지
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• 제32권3호
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• pp.263-267
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• 2015

복부 초음파 영상검사에서 부신 종괴가 확인된 세 마리의 개에서 지연형 조영증강 전산화단층촬영을 적용한 영상검사가 진행되었다. 조영제 주입 전과 주입 직후, 5분의 지연 시간 후에 CT 검사를 하였으며 위치, 조영 전과 후의 양상, 주변 장기와의 관계, washout 정도를 평가하였다. 세 마리 개 모두에서 부신절제술이 실시되었으며 조직병리 검사 결과 골수지방종을 동반한 크롬친화세포종, 부신샘종, 부신암종으로 진단되었다. 부신암종을 가진 한 마리의 개를 제외하고는 수술 후 회복하여 퇴원하였다.

• 한국임상수의학회지
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• 제27권1호
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• pp.42-45
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• 2010

만성의 비강 삼출물 및 비출혈로 내원한 5마리의 개와 2마리의 고양이가 내원하여 일반 방사선 검사 및 컴퓨터단층촬영 (CT), 비강의 세포학적 검사와 미생물학적 검사를 실시하여 비염으로 진단한 증례를 선정하여 이의 CT 영상의 특징을 비교 평가하였다. 비강의 일반 방사선 검사에서 3 증례에서만 비강의 비정상 소견을 확인하였다. CT 검사 결과, 비강 (7증례) 및 전두동 (3 증례), 비인두 (2증례)에서 공동을 갖는 isodense한 병변을 확인하였으며 비중격의 소실 (4 증례), 비갑개의 파괴 (5 증례), 상악 (3 증례) 또는 경구개 (3 증례)의 골융해 소견이 관찰되었다. 병변의 조영증강효과는 5 증례에서 확인하였다. CT는 비강의 질병을 평가하고 특히 병변의 범위를 결정하는데 매우 유용하다.