Abstract:
OBJECTIVE:To evaluate the feasibility of texture analysis on non-contrast-enhanced T1 maps of cardiac magnetic resonance (CMR) imaging for the diagnosis of myocardial injury in acute myocardial infarction (MI). MATERIALS AND METHODS:This study included 68 patients (57 males and 11 females; mean age, 55.7 ± 10.5 years) with acute ST-segment-elevation MI who had undergone 3T CMR after a percutaneous coronary intervention. Forty patients of them also underwent a 6-month follow-up CMR. The CMR protocol included T2-weighted imaging, T1 mapping, rest first-pass perfusion, and late gadolinium enhancement. Radiomics features were extracted from the T1 maps using open-source software. Radiomics signatures were constructed with the selected strongest features to evaluate the myocardial injury severity and predict the recovery of left ventricular (LV) longitudinal systolic myocardial contractility. RESULTS:A total of 1088 segments of the acute CMR images were analyzed; 103 (9.5%) segments showed microvascular obstruction (MVO), and 557 (51.2%) segments showed MI. A total of 640 segments were included in the 6-month follow-up analysis, of which 160 (25.0%) segments showed favorable recovery of LV longitudinal systolic myocardial contractility. Combined radiomics signature and T1 values resulted in a higher diagnostic performance for MVO compared to T1 values alone (area under the curve [AUC] in the training set; 0.88, 0.72, p = 0.031: AUC in the test set; 0.86, 0.71, p002). Combined radiomics signature and T1 values also provided a higher predictive value for LV longitudinal systolic myocardial contractility recovery compared to T1 values (AUC in the training set; 0.76, 0.55, p < 0.001: AUC in the test set; 0.77, 0.60, p < 0.001). CONCLUSION:The combination of radiomics of non-contrast-enhanced T1 mapping and T1 values could provide higher diagnostic accuracy for MVO. Radiomics also provides incremental value in the prediction of LV longitudinal systolic myocardial contractility at six months.
journal_name
Korean J Radioljournal_title
Korean journal of radiologyauthors
Ma Q,Ma Y,Yu T,Sun Z,Hou Ydoi
10.3348/kjr.2019.0969subject
Has Abstractpub_date
2020-11-30 00:00:00eissn
1229-6929issn
2005-8330pii
21.e184pub_type
杂志文章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
doi:10.3348/kjr.2019.0576
更新日期:2020-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the three-phase helical CT features of early hepatocellular carcinomas, based on the new Japanese classification. MATERIALS AND METHODS:Over the course of an eight-year period, we collected 16 pathologically proven early hepatocellular carcinomas from 16 patients having undergone a three-phase he...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2008.9.4.325
更新日期:2008-07-01 00:00:00
abstract::Microvascular ultrasonographic imaging is the most recent and unique Doppler ultrasound technique. It uses an advanced clutter filter that can remove clutter artifacts and preserve the low-velocity microvascular flow signal. The potential advantages of microvascular ultrasonography are its superiority in detection and...
journal_title:Korean journal of radiology
pub_type: 杂志文章,评审
doi:10.3348/kjr.2019.0500
更新日期:2020-02-01 00:00:00
abstract:OBJECTIVE:To evaluate the impact of energy and access methods on extrahepatic tumor spreading and the ablation zone in an ex vivo subcapsular tumor mimic model with a risk of extrahepatic tumor spreading. MATERIALS AND METHODS:Forty-two tumor-mimics were created in bovine liver blocks by injecting a mixture of iodine ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2018.0564
更新日期:2019-04-01 00:00:00
abstract: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...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2016.17.1.83
更新日期:2016-01-01 00:00:00
abstract:OBJECTIVE:To compare various models of diffusion-weighted imaging including monoexponential apparent diffusion coefficient (ADC), biexponential (fast diffusion coefficient [Df], slow diffusion coefficient [Ds], and fraction of fast diffusion), stretched-exponential (distributed diffusion coefficient and anomalous expon...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2018.0474
更新日期:2019-05-01 00:00:00
abstract:OBJECTIVE:To investigate whether there is a relationship between texture analysis parameters of apparent diffusion coefficient (ADC) maps and histopathologic features of MCF-7 and MDA-MB-231 xenograft models. MATERIALS AND METHODS:MCF-7 estradiol (+), MCF-7 estradiol (-), and MDA-MB-231 xenograft models were made with...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2014.15.5.591
更新日期:2014-09-01 00:00:00
abstract:OBJECTIVE:We wanted to introduce a new technique for superselective catheterization of arteries with preshaping of a micro-guide wire into a shepherd's hook form, and this is useful for superselection of small arteries branching at an acute angle from a large parent artery for the treatment of tumors and hemorrhages. ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2007.8.3.225
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVE:The aim of this work was to determine the radiation dose received by infants from radiographic exposure and the contribution from scatter radiation due to radiographic exposure of other infants in the same room. MATERIALS AND METHODS:We retrospectively evaluated the entrance skin doses (ESDs) and effective d...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2008.9.5.416
更新日期:2008-09-01 00:00:00
abstract:OBJECTIVE:To retrospectively evaluate the frequency and risk factors for developing thrombus in a systemic vein such as the infrarenal inferior vena cava or the iliac vein, in which a balloon-occluded retrograde transvenous obliteration (B-RTO) catheter was indwelled. MATERIALS AND METHODS:Forty-nine patients who unde...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2012.13.3.324
更新日期:2012-05-01 00:00:00
abstract:OBJECTIVE:To assess the safety and efficacy of lymphopseudoaneurysm (LPA) glue (n-butyl cyanoacrylate [NBCA]) embolization in the management of chylous ascites after retroperitoneal surgery. MATERIALS AND METHODS:A retrospective analysis from January 2014 to October 2018 was performed in six patients (4 females and 2 ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2020.0056
更新日期:2020-08-28 00:00:00
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
doi:10.3348/kjr.2018.19.4.632
更新日期:2018-07-01 00:00:00
abstract:OBJECTIVE:To compare the effectiveness of radiofrequency ablation (RFA) combined with transcatheter arterial chemoembolization (TACE) with surgical resection in patients with a single hepatocellular carcinoma (HCC) ranging from 2 to 5 cm. MATERIALS AND METHODS:The study participants were enrolled over a period of 29 m...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2013.14.4.626
更新日期:2013-07-01 00:00:00
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
doi:10.3348/kjr.2008.9.1.1
更新日期:2008-01-01 00:00:00
abstract::(11)C-methionine (Met) positron emission tomography (PET) is one of the most commonly used PET tracers for evaluating brain tumors. However, few reports have described tips and pitfalls of (11)C-Met PET for general practitioners. Physiological (11)C-Met uptake, anatomical variations, vascular disorders, non-tumorous l...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2016.17.3.424
更新日期:2016-05-01 00:00:00
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
doi:10.3348/kjr.2018.19.3.425
更新日期:2018-05-01 00:00:00
abstract::A 74-year-old man presented with a progressively worsening pain in sacrum and was diagnosed to have a sacral chordoma by biopsy in May, 2004. Percutaneous intratumoral injection with lipiodol-pingyangmycin suspension (LPS) was carried out under image guidance and repeated when the pain in sacrum recurred and the tumor...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2013.14.5.823
更新日期:2013-09-01 00:00:00
abstract:OBJECTIVE:We wanted to evaluate the effectiveness of intraluminal irradiation with Holmium-166 ((166)Ho) for reducing the pseudointimal hyperplasia (PIH) in the transjugular intrahepatic portosystemic shunt (TIPS) tract in a swine model. MATERIALS AND METHODS:TIPS was performed in 12 domestic pigs, after the creation ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2007.8.2.127
更新日期:2007-03-01 00:00:00
abstract:OBJECTIVE:To evaluate spine magnetic resonance imaging (MRI) inter-reader and intra-reader reliabilities using the thoracolumbar injury classification system and severity score (TLICS) and to analyze the effects of reader experience on reliability and the possible reasons for discordant interpretations. MATERIALS AND ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2015.16.4.889
更新日期:2015-07-01 00:00:00
abstract::The guideline for the management of hepatocellular carcinoma (HCC) was first developed in 2003 and revised in 2009 by the Korean Liver Cancer Study Group and the National Cancer Center, Korea. Since then, many studies on HCC have been carried out in Korea and other countries. In particular, a substantial body of knowl...
journal_title:Korean journal of radiology
pub_type: 杂志文章,实务指引
doi:10.3348/kjr.2015.16.3.465
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVE:The purpose of the study was to non-invasively characterize and discriminate brown adipose tissue (BAT) from white adipose tissue (WAT) in rats using spectral computed tomography (CT) with histological validation. MATERIALS AND METHODS:A lipid-containing phantom (lipid fractions from 0% to 100%) was imaged w...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2019.0111
更新日期:2020-02-01 00:00:00
abstract:OBJECTIVE:To compare conventional sensitivity encoding (SENSE) to compressed sensing plus SENSE (CS) for high-resolution magnetic resonance imaging (HR-MRI) of intracranial and extracranial arteries. MATERIALS AND METHODS:HR-MRI was performed in 14 healthy volunteers. Three-dimensional T1-weighted imaging (T1WI) and p...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2018.0424
更新日期:2019-03-01 00:00:00
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
doi:10.3348/kjr.2018.19.5.905
更新日期:2018-09-01 00:00:00
abstract::A 63-year-old man was found in the street after overrun by a car. Postmortem CT revealed multiple bone fractures, but surprisingly all without any relevant hemorrhage which would have been expected under such circumstances. A round radiopaque formation was found in the duodenum, which was reminiscent of ingested table...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2014.15.2.205
更新日期:2014-03-01 00:00:00
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
doi:10.3348/kjr.2019.0084
更新日期:2019-12-01 00:00:00
abstract:OBJECTIVE:To explore the in-vivo 1H- MR spectral features of adnexal lesions and to characterize the spectral patterns of various pathologic entities. MATERIALS AND METHODS:Thirty-one patients with surgically and histopathologically confirmed adnexal lesions underwent short echo-time STEAM (stimulated echo acquisition...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2002.3.2.105
更新日期:2002-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the interobserver agreement, diagnostic value, and associated clinical factors of automated breast ultrasound (ABUS) coronal features in differentiating breast lesions. MATERIALS AND METHODS:This study enrolled 457 pathologically confirmed lesions in 387 female (age, 46.4 ± 10.3 years), including...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2019.0525
更新日期:2020-05-01 00:00:00
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
doi:10.3348/kjr.2013.14.3.439
更新日期:2013-05-01 00:00:00
abstract:OBJECTIVE:To investigate the predictive value of intraplaque neovascularization (IPN) for cardiovascular outcomes. MATERIALS AND METHODS:We evaluated 217 patients with coronary artery disease (CAD) (158 men; mean age, 68 ± 10 years) with a maximal carotid plaque thickness ≥ 1.5 mm for the presence of IPN using contras...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2019.0550
更新日期:2020-07-01 00:00:00
abstract::CT is increasingly being used for evaluating the cardiovascular structures and airways in the patients with congenital heart disease. Multi-slice CT has traditionally been used for the evaluation of the extracardiac vascular and airway abnormalities because of its inherent high spatial resolution and excellent air-tis...
journal_title:Korean journal of radiology
pub_type: 杂志文章,评审
doi:10.3348/kjr.2010.11.1.4
更新日期:2010-01-01 00:00:00