• 제목/요약/키워드: Cardiothoracic CT

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Pediatric Cardiothoracic CT Guideline Provided by the Asian Society of Cardiovascular Imaging Congenital Heart Disease Study Group: Part 2. Contemporary Clinical Applications

  • Hyun Woo Goo;Suvipaporn Siripornpitak;Shyh-Jye Chen;Oktavia Lilyasari;Yu-Min Zhong;Haifa Abdul Latiff;Eriko Maeda;Young Jin Kim;I-Chen Tsai;Dong Man Seo
    • Korean Journal of Radiology
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    • 제22권8호
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    • pp.1397-1415
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    • 2021
  • The use of pediatric cardiothoracic CT for congenital heart disease (CHD) was traditionally limited to the morphologic evaluation of the extracardiac thoracic vessels, lungs, and airways. Currently, the applications of CT have increased, owing to technological advancements in hardware and software as well as several dose-reduction measures. In the previously published part 1 of the guideline by the Asian Society of Cardiovascular Imaging Congenital Heart Disease Study Group, we reviewed the prerequisite technical knowledge for clinical applications in a user-friendly and vendor-specific manner. Herein, we present the second part of our guideline on contemporary clinical applications of pediatric cardiothoracic CT for CHD based on the consensus of experts from the Asian Society of Cardiovascular Imaging CHD Study Group. This guideline describes up-to-date clinical applications effectively in a systematic fashion.

Image Quality and Radiation Dose of High-Pitch Dual-Source Spiral Cardiothoracic Computed Tomography in Young Children with Congenital Heart Disease: Comparison of Non-Electrocardiography Synchronization and Prospective Electrocardiography Triggering

  • Goo, Hyun Woo
    • Korean Journal of Radiology
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    • 제19권6호
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    • pp.1031-1041
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    • 2018
  • Objective: To compare image quality and radiation dose of high-pitch dual-source spiral cardiothoracic computed tomography (CT) between non-electrocardiography (ECG)-synchronized and prospectively ECG-triggered data acquisitions in young children with congenital heart disease. Materials and Methods: Eighty-six children (${\leq}3$ years) with congenital heart disease who underwent high-pitch dual-source spiral cardiothoracic CT were included in this retrospective study. They were divided into two groups (n = 43 for each; group 1 with non-ECG-synchronization and group 2 with prospective ECG triggering). Patient-related parameters, radiation dose, and image quality were compared between the two groups. Results: There were no significant differences in patient-related parameters including age, cross-sectional area, body density, and water-equivalent area between the two groups (p > 0.05). Regarding radiation dose parameters, only volume CT dose index values were significantly different between group 1 ($1.13{\pm}0.09mGy$) and group 2 ($1.07{\pm}0.12mGy$, p < 0.02). Among image quality parameters, significantly higher image noise ($3.8{\pm}0.7$ Hounsfield units [HU] vs. $3.3{\pm}0.6HU$, p < 0.001), significantly lower signal-to-noise ratio ($105.0{\pm}28.9$ vs. $134.1{\pm}44.4$, p = 0.001) and contrast-to-noise ratio ($84.5{\pm}27.2$ vs. $110.1{\pm}43.2$, p = 0.002), and significantly less diaphragm motion artifacts ($3.8{\pm}0.5$ vs. $3.7{\pm}0.4$, p < 0.04) were found in group 1 compared with group 2. Image quality grades of cardiac structures, coronary arteries, ascending aorta, pulmonary trunk, lung markings, and chest wall showed no significant difference between groups (p > 0.05). Conclusion: In high-pitch dual-source spiral pediatric cardiothoracic CT, additional ECG triggering does not substantially reduce motion artifacts in young children with congenital heart disease.

Extra-Gastrointestinal Stromal Tumor Presenting as an Anterior Chest Wall Mass

  • Lim, Junghyeon;Cho, Sung Woo;Lee, Hee Sung;Kim, Hyoung Soo;Kim, Yong Han;Park, Bong Suk
    • Journal of Chest Surgery
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    • 제50권4호
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    • pp.308-311
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    • 2017
  • A 71-year-old man was referred for an anterior chest wall mass. Chest computed tomography (CT) and positron emission tomography-CT suggested a malignant tumor. Surgical biopsy through a vertical subxiphoid incision revealed an extra-gastrointestinal stromal tumor (EGIST). En bloc resection of the tumor, including partial resection of the sternum, costal cartilage, pericardium, diaphragm, and peritoneum, was performed. Pathologic evaluation revealed a negative resection margin and confirmed the tumor as an EGIST. On postoperative day 17, the patient was discharged without any complications. At the 2-week follow-up, the patient was doing well and was asymptomatic.

Unusual Presentation of a Penetrating Aortic Arch Injury

  • Vural, Fikret Sami;Patel, Atul Kumar;Mustafa, Kashif
    • Journal of Chest Surgery
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    • 제50권4호
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    • pp.295-297
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    • 2017
  • A 27-year-old man was admitted with a penetrating injury at the mid-manubrium. Computed tomographic (CT) angiography showed a f illing def ect in the aortic arch. This was evaluated as a sign of injury and the patient underwent an emergency operation. No active bleeding or clot was f ound in the mediastinum during the operation. The laceration point was between the innominate and the left carotid artery posteriorly. The injury was approached using hypothermic circulatory arrest. Aortotomy and exploration showed a 2-cm-long full-thickness aortic injury with an overlying clot. A filling defect on angiography as a sign of a penetrating arch injury has never been reported previously, but was the main pathological finding on CT angiography in our case. The aorta is a high-pressure system and injuries to it should be treated aggressively.

소아에서 천식과 연하곤란으로 진단된 종격동 기관지 낭종 - 1예 보고 - (Mediastinal Bronchogenic Cyst Misdiagnosed as Asthma and Dysphagia in a Child - One Case Report -)

  • 이석열;전철우;이승진;이철세;이길노
    • Advances in pediatric surgery
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    • 제14권1호
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    • pp.94-97
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    • 2008
  • A 19-month-old boy suffered from stridor and dysphagia. He was taking asthma medication for a few months, but symptoms did not improve. After admission, a chest CT showed a posterior mediastinal mass, which compressed the trachea and esophagus. The removed mass via open thoracotomy was a bronchogenic cyst on histopathology. Postoperatively, stridor and dysphagia disappeared. In case of persistent and refractory stridor or dysphagia in children, congenital lesions including bronchogenic cyst need to be ruled out.

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흉강경적 후종격동 종양 절제 후 발생한 뇌공기증 - 1예 보고 - (Pneumocephalus after Thoracoscopic Excision of Posterior Mediastinal Mass -A case report-)

  • 이향림;박국양;박철현;전양빈;최창휴;이재익
    • Journal of Chest Surgery
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    • 제40권12호
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    • pp.878-881
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    • 2007
  • 흉강경적 종격동 종양 절제 후 발생하는 뇌공기증은 매우 드문 합병증으로, 척수근 주위 경막의 손상으로 인해 발생한 거미막하강-흉강 누공이 그 원인이다. 후종격동 종양으로 흉강경적 종양 절제술을 시행 받은 60세 환자가 수술 직후부터 지속적인 오심과 두통을 호소하여 시행한 뇌 전산화 단층 촬영에서 뇌공기증이 진단되었고, 보존적 치료로 호전되었기에 이를 보고하는 바이다.

Optimal Attenuation Threshold for Quantifying CT Pulmonary Vascular Volume Ratio

  • Hyun Woo Goo;Sang Hyub Park
    • Korean Journal of Radiology
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    • 제21권6호
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    • pp.756-763
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    • 2020
  • Objective: To evaluate the effects of attenuation threshold on CT pulmonary vascular volume ratios in children and young adults with congenital heart disease, and to suggest an optimal attenuation threshold. Materials and Methods: CT percentages of right pulmonary vascular volume were compared and correlated with percentages calculated from nuclear medicine right lung perfusion in 52 patients with congenital heart disease. The selected patients had undergone electrocardiography-synchronized cardiothoracic CT and lung perfusion scintigraphy within a 1-year interval, but not interim surgical or transcatheter intervention. The percentages of CT right pulmonary vascular volumes were calculated with fixed (80-600 Hounsfield units [HU]) and adaptive thresholds (average pulmonary artery enhancement [PAavg] divided by 2.50, 2.00, 1.75, 1.63, 1.50, and 1.25). The optimal threshold exhibited the smallest mean difference, the lowest p-value in statistically significant paired comparisons, and the highest Pearson correlation coefficient. Results: The PAavg value was 529.5 ± 164.8 HU (range, 250.1-956.6 HU). Results showed that fixed thresholds in the range of 320-400 HU, and adaptive thresholds of PAavg/1.75-1.50 were optimal for quantifying CT pulmonary vascular volume ratios. The optimal thresholds demonstrated a small mean difference of ≤ 5%, no significant difference (> 0.2 for fixed thresholds, and > 0.5 for adaptive thresholds), and a high correlation coefficient (0.93 for fixed thresholds, and 0.91 for adaptive thresholds). Conclusion: The optimal fixed and adaptive thresholds for quantifying CT pulmonary vascular volume ratios appeared equally useful. However, when considering a wide range of PAavg, application of optimal adaptive thresholds may be more suitable than fixed thresholds in actual clinical practice.

폐 랑게르한스 조직구 증식증의 비전형적 영상 소견: 2예에 대한 보고 (Early and Atypical Radiologic Presentations of Pulmonary Langerhans Cell Histiocytosis: A Report of Two Cases)

  • 유경화;남보다;황정화;김동원;박영우;오홍철;박수빈
    • 대한영상의학회지
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    • 제82권3호
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    • pp.756-763
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    • 2021
  • 폐의 랑게르한스 조직구 증식증은 드문 질환으로 주로 흡연력이 있는 젊은 성인 남성에서 발생한다. 이번 증례 보고는 폐 랑게르한스 조직구 증식증 2예에 대한 보고이며 이들은 모두 초기 검사에서 비전형적인 영상 소견을 보였다. 흉부 전산화단층촬영에서 폐 랑게르한스 조직구 증식증은 질환의 침범 정도와 시기에 따라 다양한 소견을 보일 수 있으며, 때로 악성 질환을 포함한 다른 중요 폐 질환들과 감별이 필요하고 영상 진단에 어려움을 줄 수 있다. 따라서, 이번 증례 보고를 통하여 폐 랑게르한스 조직구 증식증의 초기 및 비전형적인 영상 소견을 숙지함으로써 정확한 영상 진단에 도움을 주고 불필요하고 침습적인 검사를 줄일 수 있을 것으로 생각된다.

Three-Dimensional Printing of Congenital Heart Disease Models for Cardiac Surgery Simulation: Evaluation of Surgical Skill Improvement among Inexperienced Cardiothoracic Surgeons

  • Ju Gang Nam;Whal Lee;Baren Jeong;Eun-Ah Park;Ji Yeon Lim;Yujin Kwak;Hong-Gook Lim
    • Korean Journal of Radiology
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    • 제22권5호
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    • pp.706-713
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    • 2021
  • Objective: To evaluate the impact of surgical simulation training using a three-dimensional (3D)-printed model of tetralogy of Fallot (TOF) on surgical skill development. Materials and Methods: A life-size congenital heart disease model was printed using a Stratasys Object500 Connex2 printer from preoperative electrocardiography-gated CT scans of a 6-month-old patient with TOF with complex pulmonary stenosis. Eleven cardiothoracic surgeons independently evaluated the suitability of four 3D-printed models using composite Tango 27, 40, 50, and 60 in terms of palpation, resistance, extensibility, gap, cut-through ability, and reusability of. Among these, Tango 27 was selected as the final model. Six attendees (two junior cardiothoracic surgery residents, two senior residents, and two clinical fellows) independently performed simulation surgeries three times each. Surgical proficiency was evaluated by an experienced cardiothoracic surgeon on a 1-10 scale for each of the 10 surgical procedures. The times required for each surgical procedure were also measured. Results: In the simulation surgeries, six surgeons required a median of 34.4 (range 32.5-43.5) and 21.4 (17.9-192.7) minutes to apply the ventricular septal defect (VSD) and right ventricular outflow tract (RVOT) patches, respectively, on their first simulation surgery. These times had significantly reduced to 17.3 (16.2-29.5) and 13.6 (10.3-30.0) minutes, respectively, in the third simulation surgery (p = 0.03 and p = 0.01, respectively). The decreases in the median patch appliance time among the six surgeons were 16.2 (range 13.6-17.7) and 8.0 (1.8-170.3) minutes for the VSD and RVOT patches, respectively. Summing the scores for the 10 procedures showed that the attendees scored an average of 28.58 ± 7.89 points on the first simulation surgery and improved their average score to 67.33 ± 15.10 on the third simulation surgery (p = 0.008). Conclusion: Inexperienced cardiothoracic surgeons improved their performance in terms of surgical proficiency and operation time during the experience of three simulation surgeries using a 3D-printed TOF model using Tango 27 composite.

승모판막 수술에 따른 심전도 변화 (The Study on Electrocardiographic Changes after Mitral Valvular Replacement)

  • 여승동;임승평
    • Journal of Chest Surgery
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    • 제24권4호
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    • pp.421-427
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    • 1991
  • Atrial fibrillation[Af] is closely related to thrombus in left atrium, systemic embolism, and loss of the contribution of atrial contraction to cardiac output. Therefore maintenance of sinus rhythm[SR] is undoubtedly hemodynamically superior to Af in the clinical course of mitral valvular disease especially in the unstable period immediately after surgery. In this article, the conversion rate and the factors influencing the conversion of Af to SR after surgery were studied. Ninety-three patients with mitral valvular replacement at Chungnam National University Hospital were analysed with electrocardiography before and after surgery during the period from June 1985 to June 1990. Eighty patients presented Af before surgery. Twenty-four[30Yo] of the patients were converted to SR[A group] and fifty six presented continuous Af after surgery[B group]. The duration of preoperative Af, preoperative left atrial dimension[LAD], preoperative functional status[NYHA classification] and cardiothoracic[CT] ratio were factors influencing the conversion of Af to SR after surgery. The mean preoperative duration of Af was 3.5$\pm$2.6yr in group A and 7.6$\pm$4.9yr in group B. The mean preoperative LAD was 53. 7$\pm$9.4mm in group A and 62.5$\pm$11.2mm in group B. Before surgery, eleven patients[46%] were belong to NYHA class I, II in group A and eight[14%] in group B. The preoperative CT ratio was 62$\pm$6% in group A and 69$\pm$8% in group B.

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