• Journal of the Korean Society of Radiology
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• v.82 no.5
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• pp.1163-1185
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• 2021

Sudden cardiac death is an unexpected death originating from the heart that occurs within an hour of the onset of symptoms. The main cause of sudden cardiac death is arrhythmia; however, diagnosing underlying structural heart disease significantly contributes to predicting the long-term risk. Cardiovascular CT and MR provide important information for diagnosing and evaluating structural heart disease, enabling the prediction and preparation of the risk of sudden cardiac death. Therefore, we would like to focus on the various structural heart diseases that increase the risk of clinically-important sudden cardiac death and the importance of imaging findings.

• Journal of Cardiovascular Imaging
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• v.30 no.2
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• pp.149-150
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• 2022

• The Korean Journal of Nuclear Medicine
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• v.39 no.2
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• pp.107-113
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• 2005

Pharmacologic stress testing for myocardial perfusion imaging is a widely used noninvasive method for the evaluation of known or suspected coronary artery disease. The use of exercise for cardiac stress has been practiced for over 60 years and clinicians are familial with its using. However, there are inevitabe situations in which exorcise stress is inappropriate. A large number of patients with cardiac problems are unable to exercise to their full potential due to comorbidity such as osteoarthritis, vascular disease and pulmonary disease and a standard exercise stress test for myocardial perfusion imaging is suboptimal means for assessment of coronary artery disease. This problem has led to the development of the pharmacologic stress test and to a great increase in its popularity. All of the currently used pharmacologic agents have well-documented diagnostic value. This review deals the physiological actions, clinical protocols, safety, nuclear imaging applications of currently available stress agents and future development of new vasodilating agents.

• Investigative Magnetic Resonance Imaging
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• v.19 no.1
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• pp.19-30
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• 2015

Purpose: A new compressed sensing technique by iterative truncation of small transformed coefficients (ITSC) is proposed for fast cardiac CINE MRI. Materials and Methods: The proposed reconstruction is composed of two processes: truncation of the small transformed coefficients in the r-f domain, and restoration of the measured data in the k-t domain. The two processes are sequentially applied iteratively until the reconstructed images converge, with the assumption that the cardiac CINE images are inherently sparse in the r-f domain. A novel sampling strategy to reduce the normalized mean square error of the reconstructed images is proposed. Results: The technique shows the least normalized mean square error among the four methods under comparison (zero filling, view sharing, k-t FOCUSS, and ITSC). Application of ITSC for multi-slice cardiac CINE imaging was tested with the number of slices of 2 to 8 in a single breath-hold, to demonstrate the clinical usefulness of the technique. Conclusion: Reconstructed images with the compression factors of 3-4 appear very close to the images without compression. Furthermore the proposed algorithm is computationally efficient and is stable without using matrix inversion during the reconstruction.

• Journal of Chest Surgery
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• v.43 no.1
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• pp.25-32
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• 2010

Background: Patients with vascular diseases commonly have coronary artery disease and associated cardiac problems. Therefore, their underlying heart diseases may be induced or exacerbated after vascular surgery. The effectiveness of SPECT imaging, which is a relatively simple and non-invasive imaging modality, for assessing these underlying heart diseases is still controversial. This study was performed to evaluate the clinical effect of tests and treatment based on SPECT imaging prior to vascular surgery on the development of post-operation cardiac complications. Material and Method: Sixty three patients who were treated at Inje University Pusan Paik Hospital between April 2004 and September 2007 and who underwent adenosine infusion technetium-99m (Tc-99m) tetrofosmin SPECT imaging prior to vascular surgery were selected for this study and we retrospectively reviewed their records. Result: The sensitivity and specificity of detecting a perfusion defect on SPECT to predict the development of cardiac complications was relatively low at 41.2% and 52.2%, respectively. However when coronary angiographies were done on the patients with abnormal SPECT and this was followed by aggressive treatment such as coronary artery intervention and coronary artery bypass grafting based on the angiography results, there was a tendency for lower cardiac complication rates. Conclusion: SPECT imaging shows low effectiveness as a screening test for predicting cardiac complications after vascular surgery.

• Proceedings of the KSMRM Conference
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• 2001.11a
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• pp.20-24
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• 2001

• 대한핵의학회:학술대회논문집
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• 2006.05a
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• pp.37-41
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• 2006

• Korean Journal of Veterinary Research
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• v.48 no.2
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• pp.209-213
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• 2008

A four-month-old intact femlae Abyssinian cat was present for routine health evaluation, because her littermate was recently died of ventricular septal defect. Diagnostic imaging studies showed a large caudal paracardiac mass in thoracic radiography and homogenous mass adjacent to heart in the echocardiography. Further echographic study revealed that the mass was liver and the diaphragmatic line was intact. The positive contrast celiogram revealed that no extravasation of the contrast media across the diaphragm and the prolapse of diaphragm into the pleural cavity. Based on our diagnostic imaging studies, the case was diagnosed as diaphragmatic deformity in a cat mimicking a cardiac mass.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.2
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• pp.133-137
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• 2010

In this study, The imaging of 128 channels cardiac activation signal is implemented. It is performed within one minutes and very useful in open-heart operation with analysis in a short time. Especially the keeping of data and the moving of system is facility because it was implemented with being based on PC. The cardiologist can call data and analysis them anytime after a surgery.

• Journal of Cardiovascular Imaging
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• v.31 no.3
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• pp.155-157
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• 2023