Coronary Microembolization with Normal Epicardial Coronary Arteries and No Visible Infarcts on Nitrobluetetrazolium Chloride-Stained Specimens: Evaluation with Cardiac Magnetic Resonance Imaging in a Swine Model.


OBJECTIVE:To assess magnetic resonance imaging (MRI) features of coronary microembolization in a swine model induced by small-sized microemboli, which may cause microinfarcts invisible to the naked eye. MATERIALS AND METHODS:Eleven pigs underwent intracoronary injection of small-sized microspheres (42 µm) and catheter coronary angiography was obtained before and after microembolization. Cardiac MRI and measurement of cardiac troponin T (cTnT) were performed at baseline, 6 hours, and 1 week after microembolization. Postmortem evaluation was performed after completion of the imaging studies. RESULTS:Coronary angiography pre- and post-microembolization revealed normal epicardial coronary arteries. Systolic wall thickening of the microembolized regions decreased significantly from 42.6 ± 2.0% at baseline to 20.3 ± 2.3% at 6 hours and 31.5 ± 2.1% at 1 week after coronary microembolization (p < 0.001 for both). First-pass perfusion defect was visualized at 6 hours but the extent was largely decreased at 1 week. Delayed contrast enhancement MRI (DE-MRI) demonstrated hyperenhancement within the target area at 6 hours but not at 1 week. The microinfarcts on gross specimen stained with nitrobluetetrazolium chloride were invisible to the naked eye and only detectable microscopically. Increased cTnT was observed at 6 hours and 1 week after microembolization. CONCLUSION:Coronary microembolization induced by a certain load of small-sized microemboli may result in microinfarcts invisible to the naked eye with normal epicardial coronary arteries. MRI features of myocardial impairment secondary to such microembolization include the decline in left ventricular function and myocardial perfusion at cine and first-pass perfusion imaging, and transient hyperenhancement at DE-MRI.


Korean J Radiol


Jin H,Yun H,Ma J,Chen Z,Chang S,Zeng M




Has Abstract


2016-01-01 00:00:00












  • Metastatic thymoma of the breast.

    abstract::Breast metastasis from nonmammary malignant neoplasms is uncommon, and it accounts for approximately 2% of all breast tumors. Distant metastasis of thymoma is very rare, and especially to extrathorcic areas. We report a female who had a metastatic thymoma in her breast 20 years after undergoing resection for a non-inv...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Kim SM,Ko EY,Han BK,Shin JH,Kang SS,Nam SJ,Cho EY

    更新日期:2008-01-01 00:00:00

  • Rapidly growing bilateral pseudoangiomatous stromal hyperplasia of the breast.

    abstract::A tumoral pseudoangiomatous stromal hyperplasia (PASH) that causes huge breast enlargement is very rare. Only two cases of huge tumoral PASHs have been reported in the English medical literature. We report here on a surgically confirmed case of bilateral huge tumoral PASH in a 47-year-old woman, and we present the ima...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Ryu EM,Whang IY,Chang ED

    更新日期:2010-05-01 00:00:00

  • Histopathologic findings related to the indeterminate or inadequate results of fine-needle aspiration biopsy and correlation with ultrasonographic findings in papillary thyroid carcinomas.

    abstract:OBJECTIVE:To determine histopathologic findings related to the indeterminate or inadequate result of fine-needle aspiration biopsy (FNAB) in papillary thyroid carcinomas (PTCs) and to correlate histopathological findings with ultrasonographic features of tumors. MATERIALS AND METHODS:We retrospectively reviewed the me...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Jung SL,Jung CK,Kim SH,Kang BJ,Ahn KJ,Kim BS,Ahn MI,Im DJ,Bae JS,Chung SK

    更新日期:2010-03-01 00:00:00

  • Nodule detection in a lung region that's segmented with using genetic cellular neural networks and 3D template matching with fuzzy rule based thresholding.

    abstract:OBJECTIVE:The purpose of this study was to develop a new method for automated lung nodule detection in serial section CT images with using the characteristics of the 3D appearance of the nodules that distinguish themselves from the vessels. MATERIALS AND METHODS:Lung nodules were detected in four steps. First, to redu...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Ozekes S,Osman O,Ucan ON

    更新日期:2008-01-01 00:00:00

  • Normal Postoperative Computed Tomography Findings after a Variety of Pancreatic Surgeries.

    abstract::Pancreatic surgery remains the only curative treatment for pancreatic neoplasms, and plays an important role in the management of medically intractable diseases. Since the original Whipple operation in the 20th century, surgical techniques have advanced, resulting in decreased postoperative complications and better cl...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Seo JW,Hwang HK,Lee M,Kim KW,Kang CM,Kim MJ,Chung YE

    更新日期:2017-03-01 00:00:00

  • Middle East Respiratory Syndrome-Coronavirus Infection: A Case Report of Serial Computed Tomographic Findings in a Young Male Patient.

    abstract::Radiologic findings of Middle East respiratory syndrome (MERS), a novel coronavirus infection, have been rarely reported. We report a 30-year-old male presented with fever, abdominal pain, and diarrhea, who was diagnosed with MERS. A chest computed tomographic scan revealed rapidly developed multifocal nodular consoli...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Choi WJ,Lee KN,Kang EJ,Lee H

    更新日期:2016-01-01 00:00:00

  • Radiological spectrum of hepatic mesenchymal hamartoma in children.

    abstract:OBJECTIVE:A hepatic mesenchymal hamartoma is an uncommon benign tumor in children and little is known about the spectrum of its radiological features. The purpose of this study is to describe the spectrum of radiological features of a hepatic mesenchymal hamartoma in children. MATERIALS AND METHODS:Thirteen children w...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Kim SH,Kim WS,Cheon JE,Yoon HK,Kang GH,Kim IO,Yeon KM

    更新日期:2007-11-01 00:00:00

  • Diagnostic Accuracy of Electrocardiogram-Gated Thoracic Computed Tomography Angiography without Heart Rate Control for Detection of Significant Coronary Artery Stenosis in Patients with Acute Ischemic Stroke: A Comparative Study.

    abstract:Objective:To compare the diagnostic performance of electrocardiogram (ECG)-gated thoracic computed tomography angiography (TCTA) without heart rate (HR) control in ischemic stroke patients with coronary CTA (CCTA) in non-stroke patients for detection of significant coronary artery stenosis. Materials and Methods:From ...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Song I,Kang JH,Kim MY,Hwang HK,Kim HY,Ko SM

    更新日期:2018-09-01 00:00:00

  • Myxoid chondrosarcoma of the sinonasal cavity in a child: a case report.

    abstract::Chondrosarcomas are malignant tumors of cartilage that rarely involve the sinonasal region, and myxoid chondrosarcoma is a rare histologic variant of chondrosarcoma that usually occurs in the soft tissue of extremities. Although several case reports and results of small series of chondrosarcomas in the sinonasal regio...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Kim YJ,Im SA,Lim GY,Chun HJ,Park HJ,Kim MS,Choi YJ

    更新日期:2007-09-01 00:00:00

  • Image quality improvement after implementation of a CT accreditation program.

    abstract:OBJECTIVE:The purpose of this study was to evaluate any improvement in the quality of abdominal CTs after the utilization of the nationally based accreditation program. MATERIALS AND METHODS:Approval was obtained from the Institutional Review Board, and informed consent was waived. We retrospectively analyzed 1,011 ou...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Kim YS,Jung SE,Choi BG,Shin YR,Hwang SS,Ku YM,Lim YS,Lee JM

    更新日期:2010-09-01 00:00:00

  • Guidelines for Transrectal Ultrasonography-Guided Prostate Biopsy: Korean Society of Urogenital Radiology Consensus Statement for Patient Preparation, Standard Technique, and Biopsy-Related Pain Management.

    abstract::The Korean Society of Urogenital Radiology (KSUR) aimed to present a consensus statement for patient preparation, standard technique, and pain management in relation to transrectal ultrasound-guided prostate biopsy (TRUS-Bx) to reduce the variability in TRUS-Bx methodologies and suggest a nationwide guideline. The KSU...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章,实务指引,评审


    authors: Lee MS,Moon MH,Kim CK,Park SY,Choi MH,Jung SI,Korean Society of Urogenital Radiology (KSUR).

    更新日期:2020-04-01 00:00:00

  • Role of fully covered self-expandable metal stent for treatment of benign biliary strictures and bile leaks.

    abstract::Endoscopic therapy by balloon dilation and placement of multiple large-bore plastic stents is the treatment of choice for benign biliary stricture. This approach is effective but it typically requires multiple endoscopic sessions given the short duration of stent patency. The endoscopic approach for treatment of bile ...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章,评审


    authors: Pausawasadi N,Soontornmanokul T,Rerknimitr R

    更新日期:2012-01-01 00:00:00

  • MR findings of the osteofibrous dysplasia.

    abstract:OBJECTIVE:The aim of this study was to describe MR findings of osteofibrous dysplasia. MATERIALS AND METHODS:MR images of 24 pathologically proven osteofibrous dysplasia cases were retrospectively analyzed for a signal intensity of the lesion, presence of intralesional fat signal, internal hypointense band, multilocul...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Jung JY,Jee WH,Hong SH,Kang HS,Chung HW,Ryu KN,Kim JY,Im SA,Park JM,Sung MS,Lee YS,Hong SJ,Jung CK,Chung YG

    更新日期:2014-01-01 00:00:00

  • Degenerating Thyroid Nodules: Ultrasound Diagnosis, Clinical Significance, and Management.

    abstract::Degenerating nodules (DNs), which primarily manifest as benign thyroid nodules, are one of the main causes of discordance in ultrasonography (US) and cytological assessments. Intranodular hemorrhage is one of the mechanisms contributing to discordant nodules, and an impaired blood supply may explain further DN shrinka...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章,评审


    authors: Ren J,Baek JH,Chung SR,Choi YJ,Jung CK,Lee JH

    更新日期:2019-06-01 00:00:00

  • Stent Compression in Iliac Vein Compression Syndrome Associated with Acute Ilio-Femoral Deep Vein Thrombosis.

    abstract:OBJECTIVE:This study was conducted to evaluate stent compression in iliac vein compression syndrome (IVCS) and to identify its association with stent patency. MATERIALS AND METHODS:Between May 2005 and June 2014, after stent placement for the treatment of IVCS with acute ilio-femoral deep vein thrombosis, follow-up CT...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Cho H,Kim JW,Hong YS,Lim SH,Won JH

    更新日期:2015-07-01 00:00:00

  • Doppler US and CT Diagnosis of Nutcracker Syndrome.

    abstract::Nutcracker syndrome (NCS) is a syndrome caused by compression of the left renal vein (LRV), between the abdominal aorta and the superior mesenteric artery, resulting in hypertension of the LRV and hematuria. Doppler ultrasonography (US) has been commonly used for the diagnosis of NCS. However, several technical issues...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章,评审


    authors: Kim SH

    更新日期:2019-12-01 00:00:00

  • The value of ultrasound-guided tattooing localization of nonpalpable breast lesions.

    abstract:OBJECTIVE:To investigate the value of ultrasound-guided tattooing localization (US-tattoo) using a charcoal suspension for breast lesions. MATERIALS AND METHODS:One hundred sixty-four nonpalpable breast lesions in 134 patients (mean age 47 years; range 30-74 years) were marked with a charcoal suspension under US guida...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Ko K,Han BK,Jang KM,Choe YH,Shin JH,Yang JH,Nam SJ

    更新日期:2007-07-01 00:00:00

  • Evaluating a thrombosed azygous vein aneurysm combined with pulmonary arterial thromboembolism by ECG-gated multidetector CT: a case report.

    abstract::Azygous vein aneurysm is a rare congenital lesion that needs to be differentiated from mediastinal mass lesions. Although almost of these anomalies are asymptomatic lesions, we experienced an interesting case in which a thrombus within an azygous vein aneurysm in a 75-year-old woman caused pulmonary thromboembolism. T...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Yang JY,Kim DH,Lee JH,Suk EH

    更新日期:2011-11-01 00:00:00

  • Efficacy of barium-based fecal tagging for CT colonography: a comparison between the use of high and low density barium suspensions in a Korean population - a preliminary study.

    abstract:OBJECTIVE:This preliminarily study was designed to determine and to compare the efficacy of two commercially available barium-based fecal tagging agents for CT colonography (CTC) (high-density [40% w/v] and low-density [4.6% w/v] barium suspensions) in a population in Korea. MATERIALS AND METHODS:In a population with ...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Kim MJ,Park SH,Lee SS,Byeon JS,Choi EK,Kim JH,Kim YN,Kim AY,Ha HK

    更新日期:2009-01-01 00:00:00

  • Pattern Analysis of Left Ventricular Remodeling Using Cardiac Computed Tomography in Children with Congenital Heart Disease: Preliminary Results.

    abstract:OBJECTIVE:To assess left ventricular remodeling patterns using cardiac computed tomography (CT) in children with congenital heart disease and correlate these patterns with their clinical course. MATERIALS AND METHODS:Left ventricular volume and myocardial mass were quantified in 17 children with congenital heart disea...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Goo HW,Park SH

    更新日期:2020-06-01 00:00:00

  • Disseminated BCG infection in a patient with severe combined immunodeficiency.

    abstract::Disseminated mycobacterial infection after bacillus Calmette-Guerin (BCG) vaccination is a very rare disorder, occurring mostly in patients with immunologic deficiency. We report a case of disseminated BCG infection in a 16-month-old girl with severe combined immunodeficiency. Plain radiographs showed multiple osteoly...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Han TI,Kim IO,Kim WS,Yeon KM

    更新日期:2000-04-01 00:00:00

  • Aortic dissection presenting with secondary pulmonary hypertension caused by compression of the pulmonary artery by dissecting hematoma: a case report.

    abstract::The rupture of an acute dissection of the ascending aorta into the space surrounding the pulmonary artery is an uncommon occurrence. No previous cases of transient pulmonary hypertension caused by a hematoma surrounding the pulmonary artery have been documented in the literature. Herein, we report a case of acute aort...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Kim DH,Ryu SW,Choi YS,Ahn BH

    更新日期:2004-04-01 00:00:00

  • Portal Vein Stenting for Delayed Jejunal Varix Bleeding Associated with Portal Venous Occlusion after Hepatobiliary and Pancreatic Surgery.

    abstract:OBJECTIVE:The study aimed to describe portal stenting for postoperative portal occlusion with delayed (≥ 3 months) variceal bleeding in the afferent jejunal loop. MATERIALS AND METHODS:Eleven consecutive patients (age range, 2-79 years; eight men and three women) who underwent portal stenting between April 2009 and De...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Hyun D,Park KB,Cho SK,Park HS,Shin SW,Choo SW,Do YS,Choo IW,Choi DW

    更新日期:2017-09-01 00:00:00

  • The role of divided injections of a sclerotic agent over two days in balloon-occluded retrograde transvenous obliteration for large gastric varices.

    abstract:OBJECTIVE:To determine the safety and usefulness of a two-tiered approach to balloon-occluded retrograde transvenous obliteration (B-RTO) as a treatment for large gastric varices after portal hypertension. MATERIALS AND METHODS:50 patients were studied who underwent B-RTO for gastric varices between October 2004 and O...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Yamagami T,Yoshimatsu R,Miura H,Matsumoto T,Hasebe T

    更新日期:2013-05-01 00:00:00

  • Ultrasonographic Findings of Scleredema Adultorum of Buschke Involving the Posterior Neck.

    abstract:Objective:To describe the clinical and ultrasonographic (US) findings in patients with scleredema adultorum of Buschke, who presented with sclerotic skin on their posterior neck. Materials and Methods:After obtaining IRB approval, eight patients with scleredema adultorum of Buschke were enrolled. They underwent US exa...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Ha DH,Lee MJ,Kim SJ

    更新日期:2018-05-01 00:00:00

  • Sclerosing stromal tumor of the ovary: MR-pathologic correlation in three cases.

    abstract::Sclerosing stromal tumor (SST) of the ovary is a very rare sex cord stromal tumor occurring in a younger age group than other types of stromal tumors and most commonly accompanied by menstrual irregularity. Several unique histologic features including pseudolobulation, sclerosis and prominent vascularity are clearly r...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章,评审


    authors: Kim JY,Jung KJ,Chung DS,Kim OD,Lee JH,Youn SK

    更新日期:2003-07-01 00:00:00

  • Post-operative hemorrhage after myomectomy: safety and efficacy of transcatheter uterine artery embolization.

    abstract:OBJECTIVE:To evaluate the safety and clinical efficacy of transcatheter uterine artery embolization (UAE) for post-myomectomy hemorrhage. MATERIALS AND METHODS:We identified eight female patients (age ranged from 29 to 51 years and with a median age of 37) in two regional hospitals who suffered from post-myomectomy he...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Wan AY,Shin JH,Yoon HK,Ko GY,Park S,Seong NJ,Yoon CJ

    更新日期:2014-05-01 00:00:00

  • 2017 Thyroid Radiofrequency Ablation Guideline: Korean Society of Thyroid Radiology.

    abstract::Thermal ablation using radiofrequency is a new, minimally invasive modality employed as an alternative to surgery in patients with benign thyroid nodules and recurrent thyroid cancers. The Task Force Committee of the Korean Society of Thyroid Radiology (KSThR) developed recommendations for the optimal use of radiofreq...

    journal_title:Korean journal of radiology

    pub_type: 指南,杂志文章


    authors: Kim JH,Baek JH,Lim HK,Ahn HS,Baek SM,Choi YJ,Choi YJ,Chung SR,Ha EJ,Hahn SY,Jung SL,Kim DS,Kim SJ,Kim YK,Lee CY,Lee JH,Lee KH,Lee YH,Park JS,Park H,Shin JH,Suh CH,Sung JY,Sim JS,Youn I,Choi M,Na DG,G

    更新日期:2018-07-01 00:00:00

  • 18F-fluorodeoxyglucose PET/CT in a patient with esophageal and genital leiomyomatosis.

    abstract::Diffuse esophageal leiomyomatosis is a rare benign tumor, which can be associated with leiomyoma in female genital tracts involving the uterus, vagina, and vulva. Alport syndrome, an inherited disorder that includes the kidneys, eyes, and sensorineural hearing loss, is also rarely associated with these multiple leiomy...

    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: An YS,Kim DY

    更新日期:2009-11-01 00:00:00

  • Clinical Features and Radiological Findings of Adenovirus Pneumonia Associated with Progression to Acute Respiratory Distress Syndrome: A Single Center Study in 19 Adult Patients.

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    journal_title:Korean journal of radiology

    pub_type: 杂志文章


    authors: Cha MJ,Chung MJ,Lee KS,Kim TJ,Kim TS,Chong S,Han J

    更新日期:2016-11-01 00:00:00