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

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https://www.readbyqxmd.com/read/30174490/columnar-cell-variant-of-papillary-thyroid-carcinoma-ultrasonographic-and-clinical-differentiation-between-the-indolent-and-aggressive-types
#1
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
https://www.readbyqxmd.com/read/30174489/complementary-role-of-elastography-using-carotid-artery-pulsation-in-the-ultrasonographic-assessment-of-thyroid-nodules-a-prospective-study
#2
Soo Yeon Hahn, Jung Hee Shin, Eun Young Ko, Jung Min Bae, Ji Soo Choi, Ko Woon Park
Objective: The aim of this study was to evaluate the diagnostic performance of gray-scale ultrasonography (US), Doppler scan, and elastography using carotid artery pulsation in the diagnosis of thyroid nodules and to find a complementary role of elastography. Materials and Methods: A total 197 thyroid nodules with 91 malignant and 106 benign pathologic results from 187 patients (41 males and 146 females; age range, 20-83 years; mean age, 49.4 years) were included in this prospective study...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174488/breast-lesions-in-children-and-adolescents-diagnosis-and-management
#3
Eun Ji Lee, Yun-Woo Chang, Jung Hee Oh, Jiyoung Hwang, Seong Sook Hong, Hyun-Joo Kim
Pediatric breast disease is uncommon, and primary breast carcinoma in children is extremely rare. Therefore, the approach used to address breast lesions in pediatric patients differs from that in adults in many ways. Knowledge of the normal imaging features at various stages of development and the characteristics of breast disease in the pediatric population can help the radiologist to make confident diagnoses and manage patients appropriately. Most breast diseases in children are benign or associated with breast development, suggesting a need for conservative treatment...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174487/the-imaging-of-localization-related-symptomatic-epilepsies-the-value-of-arterial-spin-labelling-based-magnetic-resonance-perfusion
#4
Chinmay Nagesh, Savith Kumar, Ramshekhar Menon, Bejoy Thomas, Ashalatha Radhakrishnan, Chandrasekharan Kesavadas
Accurate identification of the epileptogenic zone is an important prerequisite in presurgical evaluation of refractory epilepsy since it affects seizure-free outcomes. Apart from structural magnetic resonance imaging (sMRI), delineation has been traditionally done with electroencephalography and nuclear imaging modalities. Arterial spin labelling (ASL) sequence is a non-contrast magnetic resonance perfusion technique capable of providing similar information. Similar to single-photon emission computed tomography, its utility in epilepsy is based on alterations in perfusion linked to seizure activity by neurovascular coupling...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174486/contrast-enhanced-ct-with-knowledge-based-iterative-model-reconstruction-for-the-evaluation-of-parotid-gland-tumors-a-feasibility-study
#5
Chae Jung Park, Ki Wook Kim, Ho-Joon Lee, Myeong-Jin Kim, Jinna Kim
Objective: The purpose of this study was to determine the diagnostic utility of low-dose CT with knowledge-based iterative model reconstruction (IMR) for the evaluation of parotid gland tumors. Materials and Methods: This prospective study included 42 consecutive patients who had undergone low-dose contrast-enhanced CT for the evaluation of suspected parotid gland tumors. Prior or subsequent non-low-dose CT scans within 12 months were available in 10 of the participants...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174485/effect-of-poly-lactide-co-glycolide-nanoparticles-on-local-retention-of-fluorescent-material-an-experimental-study-in-mice
#6
Yeonah Kang, Eugene Lee, Joon Woo Lee, Sung Rae Kim, Myung Joo Kang, Young Wook Choi, Joong Mo Ahn, Yusuhn Kang, Heung Sik Kang
Objective: Poly(lactide-co-glycolide) (PLGA) nanoparticles are promising materials for the development of new drug-releasing systems. The purpose of this study was to evaluate the in vivo retention time of materials loaded in nanoparticles as compared with that of the material alone by in vivo imaging in nude mice. Materials and Methods: Mice (n = 20) were injected with 0.1 mL fluorescent material 1,1'-dioctadecyl-3,3,3',3' tetramethylindotricarbocyanine iodide (DiR)-loaded PLGA nanoparticles (200 nm) into the right paraspinal muscle, and the same volume of pure DiR solution was injected into the left paraspinal muscle...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174484/efficacy-and-safety-of-microwave-ablation-for-malignant-renal-tumors-an-updated-systematic-review-and-meta-analysis-of-the-literature-since-2012
#7
Sang Hyun Choi, Jong Woo Kim, Jin Hyoung Kim, Kyung Won Kim
Objective: To systematically determine the treatment outcomes of percutaneous microwave ablation (MWA) in patients with malignant renal tumor. Materials and Methods: Original studies that reported the clinical outcomes of MWA in patients with malignant renal tumors were identified in MEDLINE and EMBASE from 2012 to June 30, 2017. Inverse variance and random-effects models were used to evaluate and acquire meta-analytic summary estimates of various clinical outcomes, including technical outcomes (technical success rate [TSR] and technical efficacy rate [TER]), oncologic outcomes (local tumor recurrence rate [LRR], cancer-specific survival rate [CSSR], and overall survival rate [OSR]), and complications...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174483/role-of-ct-in-differentiating-malignant-focal-splenic-lesions
#8
Siwon Jang, Jung Hoon Kim, Bo Yun Hur, Su Joa Ahn, Ijin Joo, Min Ju Kim, Joon Koo Han
Objective: The purpose of this study was to asses the CT findings and clinical features differentiating malignant from benign focal splenic lesions. Materials and Methods: Among 673 patients with splenectomy, we included 114 patients with pathologically confirmed focal splenic lesions (malignant = 66, benign = 48). Two radiologists retrospectively assessed CT findings including: size, number, solid component, margin, wall, calcification, contrast-enhancement, lymph node (LN) enlargement and possible malignancy...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174482/correlation-between-non-alcoholic-fatty-liver-disease-and-visceral-adipose-tissue-in-non-obese-chinese-adults-a-ct-evaluation
#9
Ai-Hong Yu, Yang-Yang Duan-Mu, Yong Zhang, Ling Wang, Zhe Guo, Yong-Qiang Yu, Yu-Sheng Wang, Xiao-Guang Cheng
Objective: To investigate the correlation between non-alcoholic fatty liver disease and visceral adipose tissue in non-obese Chinese adults using computed tomography (CT). Materials and Methods: The study included 454 subjects undergoing abdominal CT scan. Degree of CT attenuation in liver and spleen, and the degree of fat infiltration in liver were evaluated according to three indices: the attenuation value of liver parenchyma (CTLP ), the attenuation ratio of liver and spleen (LSratio ) and the attenuation difference between liver and spleen (LSdif )...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174481/histogram-analysis-of-diffusion-kurtosis-magnetic-resonance-imaging-for-diagnosis-of-hepatic-fibrosis
#10
Ruo-Fan Sheng, Kai-Pu Jin, Li Yang, He-Qing Wang, Hao Liu, Yuan Ji, Cai-Xia Fu, Meng-Su Zeng
Objective: To investigate the diagnostic value of diffusion kurtosis imaging (DKI) histogram analysis in hepatic fibrosis staging. Materials and Methods: Thirty-six rats were divided into carbon tetrachloride-induced fibrosis groups (6 rats per group for 2, 4, 6, and 8 weeks) and a control group (n = 12). MRI was performed using a 3T scanner. Histograms of DKI were obtained for corrected apparent diffusion (D), kurtosis (K) and apparent diffusion coefficient (ADC)...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174480/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
#11
Inyoung Song, Ji Hun Kang, Mi Young Kim, Hweung Kon Hwang, Han Young Kim, Sung Min Ko
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 September 2009 through August 2014, we retrospectively enrolled 138 consecutive patients diagnosed with acute ischemic stroke who had undergone ECG-gated TCTA and conventional coronary angiography (CCA)...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174479/identification-of-preoperative-magnetic-resonance-imaging-features-associated-with-positive-resection-margins-in-breast-cancer-a-retrospective-study
#12
Jung-Hyun Kang, Ji Hyun Youk, Jeong-Ah Kim, Hye Mi Gweon, Na Lae Eun, Kyung Hee Ko, Eun Ju Son
Objective: To determine which preoperative breast magnetic resonance imaging (MRI) findings and clinicopathologic features are associated with positive resection margins at the time of breast-conserving surgery (BCS) in patients with breast cancer. Materials and Methods: We reviewed preoperative breast MRI and clinicopathologic features of 120 patients (mean age, 53.3 years; age range, 27-79 years) with breast cancer who had undergone BCS in 2015. Tumor size on MRI, multifocality, patterns of enhancing lesions (mass without non-mass enhancement [NME] vs...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174478/effect-of-hybrid-kernel-and-iterative-reconstruction-on-objective-and-subjective-analysis-of-lung-nodule-calcification-in-low-dose-chest-ct
#13
Seul Gi Hong, Eun-Ju Kang, Jae Hyung Park, Won Jin Choi, Ki-Nam Lee, Hee Jin Kwon, Dong-Ho Ha, Dong Won Kim, Sang Hyeon Kim, Jeong-Hyun Jo, Jongmin Lee
Objective: To evaluate the differences in subjective calcification detection rates and objective calcium volumes in lung nodules according to different reconstruction methods using hybrid kernel (FC13-H) and iterative reconstruction (IR). Materials and Methods: Overall, 35 patients with small (< 4 mm) calcified pulmonary nodules on chest CT were included. Raw data were reconstructed using filtered back projection (FBP) or IR algorithm (AIDR-3D; Canon Medical Systems Corporation), with three types of reconstruction kernel: conventional lung kernel (FC55), FC13-H and conventional soft tissue kernel (FC13)...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174477/open-bronchus-sign-on-ct-a-risk-factor-for-hemoptysis-after-percutaneous-transthoracic-biopsy
#14
Hyungjin Kim, Chang Min Park, Soon Ho Yoon, Eui Jin Hwang, Jong Hyuk Lee, Su Yeon Ahn, Jin Mo Goo
Objective: We hypothesized that open bronchi within target pulmonary lesions are associated with percutaneous transthoracic needle biopsy (PTNB)-related hemoptysis. We sought to analyze and compare patient characteristics and target features as well as biopsy-related factors between patients with and without PTNB-related hemoptysis. Materials and Methods: We retrospectively analyzed 1484 patients (870 males and 614 females; median age, 66 years) who had undergone 1569 cone-beam CT (CBCT)-guided PTNBs...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174476/cone-beam-ct-virtual-navigation-guided-percutaneous-needle-biopsy-of-suspicious-pleural-metastasis-a-pilot-study
#15
Hyun-Ju Lim, Chang Min Park, Soon Ho Yoon, Jae Seok Bae, Jin Mo Goo
Objective: To evaluate the diagnostic performance of cone-beam computed tomography (CBCT) virtual navigation-guided percutaneous pleural biopsy for suspected malignant pleural disease. Materials and Methods: This study enrolled 59 patients (31 males and 28 females; mean age, 63.4 years) with suspected malignant pleural disease diagnosed with CBCT from December 2010 to December 2016. Sixty-three CBCT-guided biopsies were performed using a coaxial system with 18- or 20-gauge cutting needles...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174475/2018-korean-clinical-imaging-guideline-for-hemoptysis
#16
REVIEW
Mi-Jin Kang, Jin Hwan Kim, Yoon Kyung Kim, Hyun Joo Lee, Kyung Min Shin, Jung Im Kim, Hyun Ju Lee, Kyung Hyun Do, Hwan Seok Yong, Sol Ji Choi, Miyoung Choi, Jung Im Jung
In 2014, the American College of Radiology (ACR) announced the guideline for the appropriate diagnostic approach and treatment of patients according to the severity of hemoptysis and risk for lung cancer. However, the application of the ACR guideline in Korea may not be appropriate, because many patients in Korea have active tuberculosis or pulmonary fibrosis due to previous tuberculosis. The Korean Society of Radiology and Korean Society of Thoracic Radiology have proposed a new guideline suitable for Korean practice...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174474/tree-in-bud-pattern-of-pulmonary-tuberculosis-on-thin-section-ct-pathological-implications
#17
REVIEW
Jung-Gi Im, Harumi Itoh
The "tree-in-bud-pattern" of images on thin-section lung CT is defined by centrilobular branching structures that resemble a budding tree. We investigated the pathological basis of the tree-in-bud lesion by reviewing the pathological specimens of bronchograms of normal lungs and contract radiographs of the post-mortem lungs manifesting active pulmonary tuberculosis. The tree portion corresponds to the intralobular inflammatory bronchiole, while the bud portion represents filling of inflammatory substances within alveolar ducts, which are larger than the corresponding bronchioles...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174473/intracranial-mirror-aneurysms-anatomic-characteristics-and-treatment-options
#18
Hyun Ho Choi, Young Dae Cho, Dong Hyun Yoo, Jeongjun Lee, Jong Hyeon Mun, Sang Joon An, Hyun-Seung Kang, Won-Sang Cho, Jeong Eun Kim, Moon Hee Han
Objective: Mirror aneurysms are generally considered as a subset of multiple aneurysms, defined as aneurysms occurring bilaterally and symmetrically on the same-named vessels. Although not infrequent, the characteristics of mirror aneurysms are not well studied. This investigation was conducted to elucidate the anatomic features of such lesions and examine treatment options. Materials and Methods: A retrospective review was conducted, aimed at 172 patients treated for 344 mirror aneurysms between January 2007 and December 2015...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174472/consensus-statements-by-korean-society-of-interventional-neuroradiology-and-korean-stroke-society-hyperacute-endovascular-treatment-workflow-to-reduce-door-to-reperfusion-time
#19
REVIEW
Dae-Hyun Kim, Byungjun Kim, Cheolkyu Jung, Hyo Suk Nam, Jin Soo Lee, Jin Woo Kim, Woong Jae Lee, Woo-Keun Seo, Ji-Hoe Heo, Seung Kug Baik, Byung Moon Kim, Joung-Ho Rha
Recent clinical trials demonstrated the clinical benefit of endovascular treatment (EVT) in patients with acute ischemic stroke due to large vessel occlusion. These trials confirmed that good outcome after EVT depends on the time interval from symptom onset to reperfusion and that in-hospital delay leads to poor clinical outcome. However, there has been no universally accepted in-hospital workflow and performance benchmark for rapid reperfusion. Additionally, wide variety in workflow for EVT is present between each stroke centers...
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/30174471/computed-diffusion-weighted-imaging-in-prostate-cancer-basics-advantages-cautions-and-future-prospects
#20
REVIEW
Yoshiko R Ueno, Tsutomu Tamada, Satoru Takahashi, Utaru Tanaka, Keitaro Sofue, Tomonori Kanda, Munenobu Nogami, Yoshiharu Ohno, Nobuyuki Hinata, Masato Fujisawa, Takamichi Murakami
Computed diffusion-weighted MRI is a recently proposed post-processing technique that produces b-value images from diffusion-weighted imaging (DWI), acquired using at least two different b-values. This article presents an argument for computed DWI for prostate cancer by viewing four aspects of DWI: fundamentals, image quality and diagnostic performance, computing procedures, and future uses.
September 2018: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
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