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

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https://www.readbyqxmd.com/read/30386151/re-2017-thyroid-radiofrequency-ablation-guideline-the-korean-society-of-thyroid-radiology
#1
COMMENT
Kai Lun Cheng, Wei-Che Lin
No abstract text is available yet for this article.
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386150/impact-of-model-based-iterative-reconstruction-on-the-correlation-between-computed-tomography-quantification-of-a-low-lung-attenuation-area-and-airway-measurements-and-pulmonary-function-test-results-in-normal-subjects
#2
Da Jung Kim, Cherry Kim, Chol Shin, Seung Ku Lee, Chang Sub Ko, Ki Yeol Lee
Objective: To compare correlations between pulmonary function test (PFT) results and different reconstruction algorithms and to suggest the optimal reconstruction protocol for computed tomography (CT) quantification of low lung attenuation areas and airways in healthy individuals. Materials and Methods: A total of 259 subjects with normal PFT and chest CT results were included. CT scans were reconstructed using filtered back projection, hybrid-iterative reconstruction, and model-based IR (MIR)...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386149/size-specific-dose-estimation-in-the-korean-lung-cancer-screening-project-does-a-32-cm-diameter-phantom-represent-a-standard-sized-patient-in-korean-population
#3
Eun Young Kim, Tae Jung Kim, Jin Mo Goo, Hyae Young Kim, Ji Won Lee, Soojung Lee, Jun-Tae Lim, Yeol Kim
Objective: The purposes of this study were to evaluate size-specific dose estimate (SSDE) of low-dose CT (LDCT) in the Korean Lung Cancer Screening (K-LUCAS) project and to determine whether CT protocols from Western countries are appropriate for lung cancer screening in Korea. Materials and Methods: For participants (n = 256, four institutions) of K-LUCAS pilot study, volume CT dose index (CTDIvol ) using a 32-cm diameter reference phantom was compared with SSDE, which was recalculated from CTDIvol using size-dependent conversion factor (f-size) based on the body size, as described in the American Association of Physicists in Medicine Report 204...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386148/age-of-data-in-contemporary-research-articles-published-in-representative-general-radiology-journals
#4
Ji Hun Kang, Dong Hwan Kim, Seong Ho Park, Jung Hwan Baek
Objective: To analyze and compare the age of data in contemporary research articles published in representative general radiology journals. Materials and Methods: We searched for articles reporting original research studies analyzing patient data that were published in the print issues of the Korean Journal of Radiology (KJR), European Radiology (ER), and Radiology in 2017. Eligible articles were reviewed to extract data collection period (time from first patient recruitment to last patient follow-up) and age of data (time between data collection end and publication)...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386147/diffusion-tensor-derived-properties-of-benign-oligemia-true-at-risk-penumbra-and-infarct-core-during-the-first-three-hours-of-stroke-onset-a-rat-model
#5
Fang-Ying Chiu, Duen-Pang Kuo, Yung-Chieh Chen, Yu-Chieh Kao, Hsiao-Wen Chung, Cheng-Yu Chen
Objective: The aim of this study was to investigate diffusion tensor (DT) imaging-derived properties of benign oligemia, true "at risk" penumbra (TP), and the infarct core (IC) during the first 3 hours of stroke onset. Materials and Methods: The study was approved by the local animal care and use committee. DT imaging data were obtained from 14 rats after permanent middle cerebral artery occlusion (pMCAO) using a 7T magnetic resonance scanner (Bruker) in room air...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386146/imaging-features-of-soft-tissue-calcifications-and-related-diseases-a-systematic-approach
#6
Zhen-An Hwang, Kyung Jin Suh, Dillon Chen, Wing P Chan, Jim S Wu
Soft-tissue calcification refers to a broad category of lesions. Calcifications are frequently identified by radiologists in daily practice. Using a simple algorithm based on the distribution pattern of the lesions and detailed clinical information, these calcified lesions can be systematically evaluated. The distribution pattern of the calcific deposits enables initial division into calcinosis circumscripta and calcinosis universalis. Using laboratory test results (serum calcium and phosphate levels) and clinical history, calcinosis circumscripta can be further categorized into four subtypes: dystrophic, iatrogenic, metastatic, and idiopathic calcification...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386145/spinal-enumeration-by-morphologic-analysis-of-spinal-variants-comparison-to-counting-in-a-cranial-to-caudal-manner
#7
Sam Yun, Sekyoung Park, Jung Gu Park, Jin Do Huh, Young Gyung Shin, Jong Hyouk Yun
Objective: To compare the spinal enumeration methods that establish the first lumbar vertebra in patients with spinal variants. Materials and Methods: Of the 1446 consecutive patients who had undergone computed tomography of the spine from March 2012 to July 2016, 100 patients (62 men, 38 women; mean age, 47.9 years; age range, 19-88 years) with spinal variants were included. Two radiologists (readers 1 and 2) established the first lumbar vertebra through morphologic analysis of the thoracolumbar junction, and labeled the vertebra by counting in a cranial-to-caudal manner...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386144/comparison-of-combined-therapy-using-conventional-chemoembolization-and-radiofrequency-ablation-versus-conventional-chemoembolization-for-ultrasound-invisible-early-stage-hepatocellular-carcinoma-barcelona-clinic-liver-cancer-stage-0-or-a
#8
Hyukjoon Lee, Chang Jin Yoon, Nak Jong Seong, Sook-Hyang Jeong, Jin-Wook Kim
Objective: To compare the therapeutic efficacy between conventional transarterial chemoembolization (cTACE) and combined therapy using cTACE and radiofrequency ablation (RFA) in ultrasound (US)-invisible early stage hepatocellular carcinoma (HCC). Materials and Methods: From January 2008 to June 2016, 167 patients with US-invisible early stage HCCs were treated with cTACE alone (cTACE group; n = 85) or cTACE followed by immediate fluoroscopy-guided RFA targeting intratumoral iodized oil retention (combined group; n = 82)...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386143/low-tube-voltage-ct-urography-using-low-concentration-iodine-contrast-media-and-iterative-reconstruction-a-multi-institutional-randomized-controlled-trial-for-comparison-with-conventional-ct-urography
#9
Sang Youn Kim, Jeong Yeon Cho, Joongyub Lee, Sung Il Hwang, Min Hoan Moon, Eun Ju Lee, Seong Sook Hong, Chan Kyo Kim, Kyeong Ah Kim, Sung Bin Park, Deuk Jae Sung, Yongsoo Kim, You Me Kim, Sung Il Jung, Sung Eun Rha, Dong Won Kim, Hyun Lee, Youngsup Shim, Inpyeong Hwang, Sungmin Woo, Hyuck Jae Choi
Objective: To compare the image quality of low-tube-voltage and low-iodine-concentration-contrast-medium (LVLC) computed tomography urography (CTU) with iterative reconstruction (IR) with that of conventional CTU. Materials and Methods: This prospective, multi-institutional, randomized controlled trial was performed at 16 hospitals using CT scanners from various vendors. Patients were randomly assigned to the following groups: 1) the LVLC-CTU (80 kVp and 240 mgI/mL) with IR group and 2) the conventional CTU (120 kVp and 350 mgI/mL) with filtered-back projection group...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386142/functional-magnetic-resonance-imaging-in-the-diagnosis-of-locally-recurrent-prostate-cancer-are-all-pulse-sequences-helpful
#10
Xiao-Li Liao, Jun-Bao Wei, Yong-Qiang Li, Jian-Hong Zhong, Cheng-Cheng Liao, Chang-Yuan Wei
Objective: To perform a meta-analysis to quantitatively assess functional magnetic resonance imaging (MRI) in the diagnosis of locally recurrent prostate cancer. Materials and Methods: A comprehensive search of the PubMed, Embase, Cochrane Central Register of Controlled Trials, and Cochrane Database of Systematic Reviews was conducted from January 1, 1995 to December 31, 2016. Diagnostic accuracy was quantitatively pooled for all studies by using hierarchical logistic regression modeling, including bivariate modeling and hierarchical summary receiver operating characteristic (HSROC) curves (AUCs)...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386141/no-touch-radiofrequency-ablation-of-vx2-hepatic-tumors-in-vivo-in-rabbits-a-proof-of-concept-study
#11
Tae-Hyung Kim, Hyoung In Choi, Bo Ram Kim, Ji Hee Kang, Ju Gang Nam, Sae Jin Park, Seunghyun Lee, Jeong Hee Yoon, Dong Ho Lee, Ijin Joo, Jeong Min Lee
Objective: In a proof of concept study, we compared no-touch radiofrequency ablation (NtRFA) in bipolar mode with conventional direct tumor puncture (DTP) in terms of local tumor control (LTC), peritoneal seeding, and tumorigenic factors, in the rabbit VX2 subcapsular hepatic tumor model. Materials and Methods: Sixty-two rabbits with VX2 subcapsular hepatic tumors were divided into three groups according to the procedure: DTP-RFA (n = 25); NtRFA (n = 25); and control (n = 12)...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386140/diagnostic-value-of-computed-tomography-in-crohn-s-disease-patients-presenting-with-acute-severe-lower-gastrointestinal-bleeding
#12
Sunyoung Lee, Byong Duk Ye, Seong Ho Park, Kyung Jin Lee, Ah Young Kim, Jong Seok Lee, Hyun Jin Kim, Suk-Kyun Yang
Objective: To investigate the diagnostic yield of contrast-enhanced computed tomography (CT) in Crohn's disease (CD) patients presenting with acute severe lower gastrointestinal bleeding (LGIB), and the role of CT in predicting the risk of rebleeding. Materials and Methods: A consecutive series of 110 CD patients presenting with acute severe LGIB between 2005 and 2016 were analyzed. Among them, 86 patients who had undergone contrast-enhanced CT constituted the study cohort...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386139/iodine-quantification-on-spectral-detector-based-dual-energy-ct-enterography-correlation-with-crohn-s-disease-activity-index-and-external-validation
#13
Yeon Soo Kim, Se Hyung Kim, Hwa Sung Ryu, Joon Koo Han
Objective: To correlate CT parameters on detector-based dual-energy CT enterography (DECTE) with Crohn's disease activity index (CDAI) and externally validate quantitative CT parameters. Materials and Methods: Thirty-nine patients with CD were retrospectively enrolled. Two radiologists reviewed DECTE images by consensus for qualitative and quantitative CT features. CT attenuation and iodine concentration for the diseased bowel were also measured. Univariate statistical tests were used to evaluate whether there was a significant difference in CTE features between remission and active groups, on the basis of the CDAI score...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386138/optimal-phase-of-dynamic-computed-tomography-for-reliable-size-measurement-of-metastatic-neuroendocrine-tumors-of-the-liver-comparison-between-pre-and-post-contrast-phases
#14
Jimi Huh, Jisuk Park, Kyung Won Kim, Hyoung Jung Kim, Jong Seok Lee, Jong Hwa Lee, Yoong Ki Jeong, Atul B Shinagare, Nikhil H Ramaiya
Objective: The reliability of size measurements of liver metastases from neuroendocrine tumors (NETs) on contrast-enhanced computed tomography (CT) phases made by different readers may be hampered due to transient, variable rim enhancement in arterial phase (AP) or portal venous phase (PVP) images. We aimed to assess the reliability of tumor size measurements in pre- and post-contrast scans. Materials and Methods: The study coordinator selected target lesions according to Response Evaluation Criteria in Solid Tumors 1...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386137/prediction-of-local-tumor-progression-after-radiofrequency-ablation-rfa-of-hepatocellular-carcinoma-by-assessment-of-ablative-margin-using-pre-rfa-mri-and-post-rfa-ct-registration
#15
Jeong Hee Yoon, Jeong Min Lee, Ernst Klotz, Hyunsik Woo, Mi Hye Yu, Ijin Joo, Eun Sun Lee, Joon Koo Han
Objective: To evaluate the clinical impact of using registration software for ablative margin assessment on pre-radiofrequency ablation (RFA) magnetic resonance imaging (MRI) and post-RFA computed tomography (CT) compared with the conventional side-by-side MR-CT visual comparison. Materials and Methods: In this Institutional Review Board-approved prospective study, 68 patients with 88 hepatocellulcar carcinomas (HCCs) who had undergone pre-RFA MRI were enrolled...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386136/computed-tomography-based-ventricular-volumes-and-morphometric-parameters-for-deciding-the-treatment-strategy-in-children-with-a-hypoplastic-left-ventricle-preliminary-results
#16
Hyun Woo Goo, Sang-Hyub Park
Objective: To determine the utility of computed tomography (CT) ventricular volumes and morphometric parameters for deciding the treatment strategy in children with a hypoplastic left ventricle (LV). Materials and Methods: Ninety-four consecutive children were included in this study and divided into small LV single ventricle repair (SVR) (n = 28), small LV biventricular repair (BVR) (n = 6), disease-matched control (n = 19), and control (n = 41) groups. The CT-based indexed LV volumes, LV-to-right-ventricular (LV/RV) volume ratio, left-to-right atrioventricular valve (AVV) area ratio, left-to-right AVV diameter ratio, and LV/RV long dimension ratio were compared between groups...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386135/image-quality-and-radiation-dose-of-high-pitch-dual-source-spiral-cardiothoracic-computed-tomography-in-young-children-with-congenital-heart-disease-comparison-of-non-electrocardiography-synchronization-and-prospective-electrocardiography-triggering
#17
Hyun Woo Goo
Objective: To compare image quality and radiation dose of high-pitch dual-source spiral cardiothoracic computed tomography (CT) between non-electrocardiography (ECG)-synchronized and prospectively ECG-triggered data acquisitions in young children with congenital heart disease. Materials and Methods: Eighty-six children (≤ 3 years) with congenital heart disease who underwent high-pitch dual-source spiral cardiothoracic CT were included in this retrospective study...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386134/development-and-validation-of-generalized-linear-regression-models-to-predict-vessel-enhancement-on-coronary-ct-angiography
#18
Takanori Masuda, Takeshi Nakaura, Yoshinori Funama, Tomoyasu Sato, Toru Higaki, Masao Kiguchi, Yoriaki Matsumoto, Yukari Yamashita, Naoyuki Imada, Kazuo Awai
Objective: We evaluated the effect of various patient characteristics and time-density curve (TDC)-factors on the test bolus-affected vessel enhancement on coronary computed tomography angiography (CCTA). We also assessed the value of generalized linear regression models (GLMs) for predicting enhancement on CCTA. Materials and Methods: We performed univariate and multivariate regression analysis to evaluate the effect of patient characteristics and to compare contrast enhancement per gram of iodine on test bolus (ΔHUTEST) and CCTA (ΔHUCCTA)...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30386133/comparison-of-the-diagnostic-accuracies-of-1-5t-and-3t-stress-myocardial-perfusion-cardiovascular-magnetic-resonance-for-detecting-significant-coronary-artery-disease
#19
Jee Young Min, Sung Min Ko, In Young Song, Jung Geun Yi, Hweung Kon Hwang, Je Kyoun Shin
Objective: To compare the diagnostic performance of cardiovascular magnetic resonance (CMR) myocardial perfusion at 1.5- and 3-tesla (T) for detecting significant coronary artery disease (CAD), with invasive coronary angiography (ICA) as the reference method. Materials and Methods: We prospectively enrolled 281 patients (age 62.4 ± 8.3 years, 193 men) with suspected or known CAD who had undergone 1.5T or 3T CMR and ICA. Two independent radiologists interpreted perfusion defects...
November 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174490/columnar-cell-variant-of-papillary-thyroid-carcinoma-ultrasonographic-and-clinical-differentiation-between-the-indolent-and-aggressive-types
#20
Jooyeon Cho, Jung Hee Shin, Soo Yeon Hahn, Young Lyun Oh
Objective: To evaluate the ultrasonography (US) features and clinical characteristics of columnar cell variant of papillary thyroid carcinoma (CCV-PTC) that can predict disease progression. Materials and Methods: Six cases of CCV-PTC were identified via surgical pathology analysis at our institution from 1994 to 2016. The histological, architectural, and cytological features met the diagnostic criteria of CCV-PTC. We reviewed the US features and clinicopathological findings in the six cases...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
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