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Korean Journal of Radiology: Official Journal of the Korean Radiological Society

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https://www.readbyqxmd.com/read/29354016/re-novel-application-of-quantitative-single-photon-emission-computed-tomography-computed-tomography-to-predict-early-response-to-methimazole-in-graves-disease
#1
Wei Zhang, Zhuo-Qun Huang, Wei-Long Lin, Shi-Hong Yang
No abstract text is available yet for this article.
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354015/quality-of-life-in-patients-treated-with-percutaneous-laser-ablation-for-non-functioning-benign-thyroid-nodules-a-prospective-single-center-study
#2
Silvia Oddo, Edineia Felix, Michele Mussap, Massimo Giusti
Objective: While many studies have reported that laser ablation (LA) for benign non-fuctioning thyroid nodules is efficacious in reducing nodular volume and neck symptoms, none have described changes in quality of life (QoL). The purpose of this study was to report post-LA changes in QoL in our cohort of patients. Materials and Methods: Fourteen patients with benign thyroid nodules were involved in a prospective, single-center study and underwent a single session of LA...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354014/efficacy-and-safety-of-radiofrequency-ablation-for-benign-thyroid-nodules-a-prospective-multicenter-study
#3
So Lyung Jung, Jung Hwan Baek, Jeong Hyun Lee, Young Kee Shong, Jin Yong Sung, Kyu Sun Kim, Ducky Lee, Ji-Hoon Kim, Seon Mi Baek, Jung Suk Sim, Dong Gyu Na
Objective: To assess the efficacy and safety of thyroid radiofrequency (RF) ablation for benign thyroid nodules by trained radiologists according to a unified protocol in a multi-center study. Materials and Methods: From 2010 to 2011, 345 nodules from 345 patients (M:F = 43:302; mean age ± SD = 46.0 ± 12.7 years, range = 15-79) who met eligibility criteria were enrolled from five institutions. At pre-ablation, the mean volume was 14.2 ± 13.2 mL (1.1-80.8 mL)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354013/ultrasonographic-interval-changes-in-solid-thyroid-nodules-after-ultrasonography-guided-fine-needle-aspiration
#4
Ik Jung Hwang, Dong Wook Kim, Yoo Jin Lee, Hye Jung Choo, Soo Jin Jung, Hye Jin Baek
Objective: None of the previous studies have investigated the interval change in ultrasonography (US) features of solid thyroid nodules (STNs) after US-guided fine-needle aspiration (US-FNA). This study aimed to assess the prevalence and characteristics of US interval changes in STNs after US-FNA. Materials and Methods: This study included 257 STNs in 257 patients in whom thyroid US and initial US-FNA had been performed by two radiologists from January 2015 to June 2015...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354012/in-vivo-visualization-of-iron-oxide-enhancement-in-focal-pulmonary-inflammatory-lesions-using-a-three-dimensional-radial-gradient-echo-based-ultrashort-echo-time-sequence-a-preliminary-study
#5
Soon Ho Yoon, Chanhee Lee, Jinil Park, Jin Mo Goo, Jang-Yeon Park
Objective: To preliminarily evaluate technical feasibility of a dual-echo ultrashort echo time (UTE) subtraction MR imaging by using concurrent dephasing and excitation (CODE) sequence for visualization of iron-oxide enhancement in focal inflammatory pulmonary lesions. Materials and Methods: A UTE pulmonary MR imaging before and after the injection of clinically usable superparamagnetic iron-oxide nanoparticles, ferumoxytol, was conducted using CODE sequence with dual echo times of 0...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354011/application-of-deconvolution-algorithm-of-point-spread-function-in-improving-image-quality-an-observer-preference-study-on-chest-radiography
#6
Kum Ju Chae, Jin Mo Goo, Su Yeon Ahn, Jin Young Yoo, Soon Ho Yoon
Objective: To evaluate the preference of observers for image quality of chest radiography using the deconvolution algorithm of point spread function (PSF) (TRUVIEW ART algorithm, DRTECH Corp.) compared with that of original chest radiography for visualization of anatomic regions of the chest. Materials and Methods: Prospectively enrolled 50 pairs of posteroanterior chest radiographs collected with standard protocol and with additional TRUVIEW ART algorithm were compared by four chest radiologists...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354010/significance-of-low-attenuation-cluster-analysis-on-quantitative-ct-in-the-evaluation-of-chronic-obstructive-pulmonary-disease
#7
Atsushi Nambu, Jordan Zach, Song Soo Kim, Gongyoung Jin, Joyce Schroeder, Yu-Il Kim, Russell Bowler, David A Lynch
Objective: To assess clinical feasibility of low-attenuation cluster analysis in evaluation of chronic obstructive pulmonary disease (COPD). Materials and Methods: Subjects were 199 current and former cigarette smokers that underwent CT for quantification of COPD and had physiological measurements. Quantitative CT (QCT) measurements included low-attenuation area percent (LAA%) (voxels ≤ -950 Hounsfield unit [HU]), and two-dimensional (2D) and three-dimensional D values of cluster analysis at three different thresholds of CT value (-856, -910, and -950 HU)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354009/assessing-the-blood-supply-status-of-the-focal-ground-glass-opacity-in-lungs-using-spectral-computed-tomography
#8
Guanfu Liu, Mengying Li, Guosheng Li, Zhiyong Li, Ailian Liu, Renwang Pu, Huizhi Cao, Yijun Liu
Objective: To exploit material decomposition analysis in dual-energy spectral computed tomography (CT) to assess the blood supply status of the ground-glass opacity (GGO) in lungs. Materials and Methods: This retrospective study included 48 patients with lung adenocarcinoma, who underwent a contrast-enhanced dual-energy spectral CT scan before treatment (53 GGOs in total). The iodine concentration (IC) and water content (WC) of the GGO, the contralateral and ipsilateral normal lung tissues were measured in the arterial phase (AP) and their differences were analyzed...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354008/quantitative-image-quality-and-histogram-based-evaluations-of-an-iterative-reconstruction-algorithm-at-low-to-ultralow-radiation-dose-levels-a-phantom-study-in-chest-ct
#9
Ki Baek Lee, Hyun Woo Goo
Objective: To describe the quantitative image quality and histogram-based evaluation of an iterative reconstruction (IR) algorithm in chest computed tomography (CT) scans at low-to-ultralow CT radiation dose levels. Materials and Methods: In an adult anthropomorphic phantom, chest CT scans were performed with 128-section dual-source CT at 70, 80, 100, 120, and 140 kVp, and the reference (3.4 mGy in volume CT Dose Index [CTDIvol]), 30%-, 60%-, and 90%-reduced radiation dose levels (2...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354007/four-dimensional-ct-of-the-diaphragm-in-children-initial-experience
#10
Hyun Woo Goo
Objective: To evaluate the technical feasibility of four-dimensional (4D) CT for the functional evaluation of the pediatric diaphragm. Materials and Methods: In 22 consecutive children (median age 3.5 months, age range 3 days-3 years), 4D CT was performed to assess diaphragm motion. Diaphragm abnormalities were qualitatively evaluated and diaphragm motion was quantitatively measured on 4D CT. Lung density changes between peak inspiration and expiration were measured in the basal lung parenchyma...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354006/findings-of-single-photon-emission-computed-tomography-and-its-relation-with-quantitative-coronary-angiography-in-patients-with-significant-stenosis-of-the-left-main-coronary-artery
#11
Hack-Lyoung Kim, So Won Oh, Hyunjong Lee, Hee Jun Kim, You Nui Kim, Woo-Hyun Lim, Jae-Bin Seo, Sang-Hyun Kim, Myung-A Kim, Joo-Hee Zo
Objective: Unrecognized left main coronary artery disease (LMCD) is often fatal; however, accuracy of non-invasive tests for diagnosing LMCD is still unsatisfactory. This study was performed to elucidate single-photon emission computed tomography (SPECT) detection of LMCD using quantitative coronary angiography (QCA) data. Materials and Methods: Fifty-five patients (39 men; mean age, 68.1 ± 10.9 years) diagnosed with significant left main (LM) stenosis (≥ 50%) by invasive coronary angiography (ICA) were retrospectively reviewed...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354005/in-vivo-assessment-of-neurodegeneration-in-type-c-niemann-pick-disease-by-ideal-iq
#12
Ruo-Mi Guo, Qing-Ling Li, Zhong-Xing Luo, Wen Tang, Ju Jiao, Jin Wang, Zhuang Kang, Shao-Qiong Chen, Yong Zhang
Objective: To noninvasively assess the neurodegenerative changes in the brain of patients with Niemann-Pick type C (NPC) disease by measuring the lesion tissue with the iterative decomposition of water and fat with echo asymmetry and least square estimation-iron quantification (IDEAL-IQ). Materials and Methods: Routine brain MRI, IDEAL-IQ and 1H-proton magnetic resonance spectroscopy (1H-MRS, served as control) were performed on 12 patients with type C Niemann-Pick disease (4 males and 8 females; age range, 15-61 years; mean age, 36 years) and 20 healthy subjects (10 males and 10 females; age range, 20-65 years; mean age, 38 years)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354004/magnetic-resonance-image-texture-analysis-of-the-periaqueductal-gray-matter-in-episodic-migraine-patients-without-t2-visible-lesions
#13
Zhiye Chen, Xiaoyan Chen, Mengqi Liu, Shuangfeng Liu, Shengyuan Yu, Lin Ma
Objective: The periaqueductal gray matter (PAG), a small midbrain structure, presents dysfunction in migraine. However, the precise neurological mechanism is still not well understood. Herein, the aim of this study was to investigate the texture characteristics of altered PAG in episodic migraine (EM) patients based on high resolution brain structural magnetic resonance (MR) images. Materials and Methods: The brain structural MR images were obtained from 18 normal controls (NC), 18 EM patients and 16 chronic migraine (CM) patients using a 3T MR system...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354003/diffusion-weighted-mr-imaging-of-unicystic-odontogenic-tumors-for-differentiation-of-unicystic-ameloblastomas-from-keratocystic-odontogenic-tumors
#14
Yifeng Han, Xindong Fan, Lixin Su, Zhenfeng Wang
Objective: Differentiating unicystic ameloblastomas from keratocystic odontogenic tumors (KCOT) is necessary for the planning of different treatment strategies; however, it is difficult based on conventional CT and MR sequences alone. The purpose of this study was to investigate the utility of diffusion-weighted imaging (DWI) and apparent diffusion coefficients (ADCs) in the differentiation of the two tumors. Materials and Methods: We prospectively studied 40 patients with odontogenic cysts and tumors of the maxillomandibular region using conventional MR imaging and DWI...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354002/cerebrospinal-fluid-dynamics-in-patients-with-multiple-sclerosis-the-role-of-phase-contrast-mri-in-the-differential-diagnosis-of-active-and-chronic-disease
#15
Serkan Öner, Ayşegül Sağır Kahraman, Cemal Özcan, Zeynep Maraş Özdemir, Serkan Ünlü, Özden Kamışlı, Zülal Öner
Objective: Multiple sclerosis (MS) is an inflammatory disease characterized by demyelinating plaques in the white matter. Chronic cerebrospinal venous insufficiency (CCSVI) has been proposed as a new hypothesis for the etiopathogenesis of MS disease. MS-CCSVI includes a significant decrease of cerebrospinal fluid (CSF) flow through the cerebral aqueduct secondary to an impaired venous outflow from the central nervous system. This study aimed to determine whether CSF flow dynamics are affected in MS patients and the contributions to differential diagnosis in active and chronic disease using phase-contrast magnetic resonance imaging (PC-MRI)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354001/the-association-between-the-magnetic-resonance-imaging-findings-of-adhesive-capsulitis-and-shoulder-muscle-fat-quantification-using-a-multi-echo-dixon-method
#16
Min A Yoon, Suk-Joo Hong, Sun Hong, Chang Ho Kang, Baek Hyun Kim, In Seong Kim
Objective: To investigate the association between the magnetic resonance imaging (MRI) findings of adhesive capsulitis and shoulder muscle fat percentages using a multi-echo Dixon method. Materials and Methods: Twenty-four patients with clinical diagnoses of adhesive capsulitis and either intact rotator cuffs or Ellman grade 1 partial tears as indicated by MRI scans were included. Two radiologists independently evaluated MRI scans of adhesive capsulitis as follows: presence or absence of axillary recess capsular and extracapsular hyperintensities; thickness of the coracohumeral ligament; thickness of abnormal rotator interval soft tissue; and thickness of glenoidal/humeral axillary recess capsules...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29354000/ultrasound-guided-intraoperative-radiofrequency-ablation-and-surgical-resection-for-liver-metastasis-from-malignant-gastrointestinal-stromal-tumors
#17
In Sun Yoon, Ji Hoon Shin, Kichang Han, Pyo Nyun Kim, Ki Hun Kim, Yoon-Koo Kang, Heung Kyu Ko
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 GISTs underwent IORFA, 14 underwent concurrent IORFA and primary GIST resection, and 10 underwent IORFA to treat hepatic recurrence after previous primary GIST resection...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29353999/impact-of-pedal-arch-patency-on-tissue-loss-and-time-to-healing-in-diabetic-patients-with-foot-wounds-undergoing-infrainguinal-endovascular-revascularization
#18
Nicola Troisi, Filippo Turini, Emiliano Chisci, Leonardo Ercolini, Pierfrancesco Frosini, Renzo Lombardi, Francesca Falciani, Cristiana Baggiore, Roberto Anichini, Stefano Michelagnoli
Objective: To retrospectively evaluate the impact of pedal arch quality on tissue loss and time to healing in diabetic patients with foot wounds undergoing infrainguinal endovascular revascularization. Materials and Methods: Between January 2014 and June 2015, 137 consecutive diabetic patients with foot wounds underwent infrainguinal endovascular revascularization (femoro-popliteal or below-the-knee, arteries). Postprocedural angiography of the foot was used to divide the patients into the following three groups according to the pedal arch status: complete pedal arch (CPA), incomplete pedal arch (IPA), and absent pedal arch (APA)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29353998/diffusion-weighted-mri-for-the-initial-viability-evaluation-of-parasites-in-hepatic-alveolar-echinococcosis-comparison-with-positron-emission-tomography
#19
Jianjun Zheng, Jing Wang, Jianqing Zhao, Xianyun Meng
Objective: More than 70% of hepatic alveolar echinococcosis (HAE) are inoperable. Thus, long-term, or even life-long, pharmacological treatment with benzimidazoles is necessary. For effective treatment, it is of great importance to employ imaging techniques to detect and monitor the non-resectable parasitic viability. Therefore, this study aimed to evaluate diffusion-weighted imaging (DWI) in assessing the viability of HAE in comparison to 18-fluoro-deoxyglucose (18F-FDG) positron emission tomography, combined with computed tomography (PET/CT)...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/29353997/left-gastric-vein-visualization-with-hepatopetal-flow-information-in-healthy-subjects-using-non-contrast-enhanced-magnetic-resonance-angiography-with-balanced-steady-state-free-precession-sequence-and-time-spatial-labeling-inversion-pulse
#20
Akihiro Furuta, Hiroyoshi Isoda, Tsuyoshi Ohno, Ayako Ono, Rikiya Yamashita, Shigeki Arizono, Aki Kido, Naotaka Sakashita, Kaori Togashi
Objective: To selectively visualize the left gastric vein (LGV) with hepatopetal flow information by non-contrast-enhanced magnetic resonance angiography under a hypothesis that change in the LGV flow direction can predict the development of esophageal varices; and to optimize the acquisition protocol in healthy subjects. Materials and Methods: Respiratory-gated three-dimensional balanced steady-state free-precession scans were conducted on 31 healthy subjects using two methods (A and B) for visualizing the LGV with hepatopetal flow...
January 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
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