Abstract:
OBJECTIVE:Using a pulsating coronary artery phantom at high heart rate settings, we investigated the efficacy of a motion correction algorithm (MCA) to improve the image quality in dual-energy spectral coronary CT angiography (CCTA). MATERIALS AND METHODS:Coronary flow phantoms were scanned at heart rates of 60-100 beats/min at 10-beats/min increments, using dual-energy spectral CT mode. Virtual monochromatic images were reconstructed from 50 to 90 keV at 10-keV increments. Two blinded observers assessed image quality using a 4-point Likert Scale (1 = non-diagnostic, 4 = excellent) and the fraction of interpretable segments using MCA versus conventional algorithm (CA). Comparison of variables was performed with the Wilcoxon rank sum test and McNemar test. RESULTS:At heart rates of 70, 80, 90, and 100 beats/min, images with MCA were rated as higher image scores compared to those with CA on monochromatic levels of 50, 60, and 70 keV (each p < 0.05). Meanwhile, at a heart rate of 90 beats/min, image interpretability was improved by MCA at a monochromatic level of 60 keV (p < 0.05) and 70 keV (p < 0.05). At a heart rate of 100 beats/min, image interpretability was improved by MCA at monochromatic levels of 50 keV (from 69.4% to 86.1%, p < 0.05), 60 keV (from 55.6% to 83.3%, p < 0.05) and 70 keV (from 33.3% to 69.3%, p < 0.05). CONCLUSION:Low-keV monochromatic images combined with MCA improves image quality and image interpretability in CCTAs at high heart rates.
journal_name
Korean J Radioljournal_title
Korean journal of radiologyauthors
Xing Y,Zhao Y,Guo N,Pan CX,Azati G,Wang YW,Liu WYdoi
10.3348/kjr.2017.18.6.881subject
Has Abstractpub_date
2017-11-01 00:00:00pages
881-887issue
6eissn
1229-6929issn
2005-8330journal_volume
18pub_type
杂志文章abstract::We report two cases of paratracheal air cyst discovered incidentally at neck ultrasonography and confirmed at CT. The cysts were located at the inferoposterior aspect of the right lobe of the thyroid. Ultrasonography revealed an ill-defined hypoechoic mass containing hyperechoic foci which mimicked calcifications. Nec...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2003.4.2.136
更新日期:2003-04-01 00:00:00
abstract:Objective:To investigate the technical safety and clinical efficacy of a double-stent system with long duodenal extension in patients with malignant extrahepatic biliary obstruction. Materials and Methods:This prospective study enrolled 48 consecutive patients (31 men, 17 women; mean age, 61 years; age range, 31-77 ye...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2018.19.2.230
更新日期:2018-03-01 00:00:00
abstract:OBJECTIVE:To evaluate the findings of brain MRI in patients with carbon disulfide poisoning. MATERIALS AND METHODS:Ninety-one patients who had suffered carbon disulfide poisoning [male:female=87:4; age, 32-74 (mean 53.3) years] were included in this study. To determine the extent of white matter hyperintensity (Grade ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2002.3.3.158
更新日期:2002-07-01 00:00:00
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
doi:10.3348/kjr.2010.11.3.355
更新日期:2010-05-01 00:00:00
abstract::Papillary tumor of the bile duct is characterized by the presence of an intraductal tumor with a papillary surface comprising innumerable frondlike infoldings of proliferated columnar epithelial cells surrounding slender fibrovascular stalks. There may be multiple tumors along the bile ducts (papillomatosis or papilla...
journal_title:Korean journal of radiology
pub_type: 杂志文章,评审
doi:10.3348/kjr.2002.3.1.57
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the feasibility of CT fluoroscopy (CTF)-guided percutaneous transhepatic biliary drainage (PTBD) in emergency patients with acute obstructive cholangitis. MATERIALS AND METHODS:The study included 28 patients admitted to the emergency center due to obstructive jaundice and found to require urgent ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2009.10.2.144
更新日期:2009-03-01 00:00:00
abstract:OBJECTIVE:To investigate the diagnostic performance of contrast-enhanced ultrasound (CEUS) and its role as a second-line imaging modality after gadoxetate-enhanced MRI (Gd-EOB-MRI) in the diagnosis of hepatocellular carcinoma (HCC) among at risk observations. MATERIALS AND METHODS:We prospectively enrolled participant...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2020.0973
更新日期:2020-11-03 00:00:00
abstract::A malignant tumor is generally believed to be very unlikely to metastasize to the thymus. Only three cases of thymic metastases have been reported so far in the medical literature. We report here a rare case of metastatic breast cancer to the thymus, which was detected by CT and PET scanning, and the metastasis was al...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2007.8.4.360
更新日期:2007-07-01 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 assess the technical feasibility of a newly designed stent-like electrode in rabbits. MATERIALS AND METHODS:A stent-like electrode was knitted from a single thread of nitinol wire and interconnected to a generator using similar wire. In order to gauge the extent of radiofrequency ablation (RFA), we measur...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2003.4.1.19
更新日期:2003-01-01 00:00:00
abstract:OBJECTIVE:To determine whether the appearance of a spiculated mass on a mammogram is associated with luminal A subtype breast cancer and the factors that may influence the presence or absence of the spiculated mass. MATERIALS AND METHODS:Three hundred seventeen (317) patients who underwent image-guided or surgical bio...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2016.17.6.846
更新日期:2016-11-01 00:00:00
abstract::Recent advances in computer technology have generated a new area of research known as radiomics. Radiomics is defined as the high throughput extraction and analysis of quantitative features from imaging data. Radiomic features provide information on the gray-scale patterns, inter-pixel relationships, as well as shape ...
journal_title:Korean journal of radiology
pub_type: 杂志文章,评审
doi:10.3348/kjr.2019.0855
更新日期:2020-07-01 00:00:00
abstract::Breast capillary hemangioma is a type of benign vascular tumor which is rarely seen. Little is known about its presentation on dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI). Here, we describe a case of suspicious breast lesion detected by DCE-MRI and pathologically confirmed as capillary hemangioma. O...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2013.14.6.869
更新日期:2013-11-01 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::Immunoglobulin G4 (IgG4)-related sclerosing disease is a systemic disease characterized by extensive IgG4-positive plasma cells and T-lymphocyte infiltration in various organs. We described the imaging findings of an IgG4-related inflammatory pseudotumor in the urethra. The urethral mass showed isoattenuation on unenh...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2012.13.6.803
更新日期:2012-11-01 00:00:00
abstract::In stenosis of a segmental branch or among multiple renal arteries, Doppler sampling of intrarenal arteries in the upper, mid and lower poles demonstrates strikingly different waveform patterns that might otherwise be overlooked. We report a case of segmental branch renal artery stenosis in which a pulsus parvus et ta...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2001.2.1.57
更新日期:2001-01-01 00:00:00
abstract:Objective:To evaluate the effectiveness, safety, and feasibility of intraoperative radiofrequency ablation (IORFA) under ultrasound guidance for the treatment of liver metastases from gastrointestinal stromal tumors (GISTs). Materials and Methods:From August 2009 to February 2017, 24 patients with liver metastases of ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2018.19.1.54
更新日期:2018-01-01 00:00:00
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
doi:10.3348/kjr.2017.18.2.299
更新日期:2017-03-01 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:OBJECTIVE:To evaluate the upgrade rate and delayed false-negative results of percutaneous vacuum-assisted removal (VAR) and surgical excision in women with imaging-histologic discordance during ultrasound (US)-guided automated core needle biopsy (CNB) of the breast and to validate the role of VAR as a rebiopsy method f...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2014.15.6.697
更新日期:2014-11-01 00:00:00
abstract::This paper reports on issues relating to the optimal use of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid magnetic resonance imaging (Gd-EOB-DTPA MR imaging) together with the generation of consensus statements from a working group meeting, which was held in Seoul, Korea (2010). Gd-EOB-DTPA has been show...
journal_title:Korean journal of radiology
pub_type: 杂志文章,评审
doi:10.3348/kjr.2011.12.4.403
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVE:To assess diffusion tensor imaging (DTI) parameters of the hepatic parenchyma for the differentiation of biliary atresia (BA) from Alagille syndrome (ALGS). MATERIALS AND METHODS:This study included 32 infants with BA and 12 infants with ALGS groups who had undergone DTI. Fractional anisotropy (FA) and mean ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2019.0824
更新日期:2020-12-01 00:00:00
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
doi:10.3348/kjr.2009.10.6.632
更新日期:2009-11-01 00:00:00
abstract::Percutaneous interventional procedures under image guidance, such as biopsy, ethanol injection therapy, and radiofrequency ablation play important roles in the management of hepatocellular carcinomas. Although uncommon, the procedures may result in tumor implantation along the needle tract, which is a major delayed co...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2008.9.3.268
更新日期:2008-05-01 00:00:00
abstract:OBJECTIVE:We investigated low dose digital tomosynthesis (DT) for the evaluation of the paranasal sinus (PNS), and compared its diagnostic accuracy with a PNS radiography series (XR). MATERIALS AND METHODS:We enrolled 43 patients for whom XR, PNS DT, and OMU CT were performed. We measured effective doses (EDs) of XR, ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2012.13.2.136
更新日期:2012-03-01 00:00:00
abstract::A 36-year-old man was diagnosed with a right temporal lobe grade II cerebral arteriovenous malformation (cAVM) and was treated with radiosurgery. At nine months after the cAVM radiosurgery, the patient began to develop bilateral focal narrowing at the M1 segments of the bilateral middle cerebral arteries. The narrowin...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2008.9.s.s65
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:To retrospectively compare treatment of hepatocellular carcinoma (HCC) with transarterial chemoembolization (TACE) using gelatin sponges or microspheres plus lipiodol-doxorubicin vs. doxorubicin-loaded drug-eluting beads (DEB). MATERIALS AND METHODS:A total of 158 patients with HCC received TACE from Novembe...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2015.16.1.125
更新日期:2015-01-01 00:00:00
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
doi:10.3348/kjr.2014.15.1.114
更新日期:2014-01-01 00:00:00
abstract::A 64-year-old male patient with liver cirrhosis underwent a CT study for hepatocellular carcinoma surveillance, which demonstrated a 1.4-cm hypervascular subcapsular tumor in the liver. On gadoxetic acid-enhanced MRI, the tumor showed brisk arterial enhancement and persistent hyperenhancement in the portal phase, but ...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2013.14.5.769
更新日期:2013-09-01 00:00:00
abstract:OBJECTIVE:1) To evaluate the mid-term efficacy and safety of a permanent nitinol inferior vena cava (IVC) filter; 2) to evaluate filter effectiveness, filter stability and caval occlusion. MATERIALS AND METHODS:A prospective evaluation of the TrapEase IVC filter was performed on 42 patients (eight men, 34 women) rangi...
journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2005.6.2.110
更新日期:2005-04-01 00:00:00