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https://www.readbyqxmd.com/read/28926610/image-similarity-evaluation-of-the-bulk-density-assigned-synthetic-ct-derived-from-mri-of-intracranial-regions-for-radiation-treatment
#1
Shin-Wook Kim, Hun-Joo Shin, Jin-Ho Hwang, Jin-Sol Shin, Sung-Kwang Park, Jin-Young Kim, Ki-Jun Kim, Chul-Seung Kay, Young-Nam Kang
OBJECTIVE: Various methods for radiation-dose calculation have been investigated over previous decades, focusing on the use of magnetic resonance imaging (MRI) only. The bulk-density-assignment method based on manual segmentation has exhibited promising results compared to dose-calculation with computed tomography (CT). However, this method cannot be easily implemented in clinical practice due to its time-consuming nature. Therefore, we investigated an automatic anatomy segmentation method with the intention of providing the proper methodology to evaluate synthetic CT images for a radiation-dose calculation based on MR images...
2017: PloS One
https://www.readbyqxmd.com/read/28921596/single-cocaine-exposure-does-not-alter-striatal-presynaptic-dopamine-function-in-mice-an-18-f-fdopa-pet-study
#2
D R Bonsall, M Kokkinou, M Veronese, C Coello, L A Wells, O D Howes
Cocaine is a recreational drug of abuse that binds to the dopamine transporter (DAT), preventing reuptake of dopamine into presynaptic terminals. The increased presence of synaptic dopamine results in stimulation of both pre- and postsynaptic dopamine receptors, considered an important mechanism by which cocaine elicits its reinforcing properties. However, the effects of acute cocaine administration on presynaptic dopamine function remain unclear. Non-invasive imaging techniques such as positron emission tomography (PET) have revealed impaired presynaptic dopamine function in chronic cocaine users...
September 18, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28920003/cd226-natural-killer-cells-fail-to-establish-stable-contacts-with-cancer-cells-and-show-impaired-control-of-tumor-metastasis-in-vivo
#3
Ji Sung Kim, Bo Ram Shin, Hong Kyung Lee, Jae Hee Lee, Ki Hun Kim, Jeong Eun Choi, A Young Ji, Jin Tae Hong, Youngsoo Kim, Sang-Bae Han
CD226 is an activating receptor expressed on natural killer (NK) cells, CD8(+) T cells, and other immune cells. Upon binding to its ligands expressed on target cells, CD226 activates intracellular signaling that triggers cytokine production and degranulation in NK cells. However, the role of CD226 in contact dynamics between NK and cancer cells has remained unclear. Our time-lapse images showed that individual wild-type CD226(+) NK cells contacted B16F10 melanoma cells for 23.7 min, but Cd226(-/-) NK cells only for 12...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28919126/low-dose-ct-for-the-diagnosis-of-appendicitis-in-adolescents-and-young-adults-locat-a-pragmatic-multicentre-randomised-controlled-non-inferiority-trial
#4
Hyuk Jung Kim, Byeong Geon Jeon, Chong Kun Hong, Kye Won Kwon, Seung Bong Han, Soya Paik, Suk Ki Jang, Young Rock Ha, Young Sik Kim, Min Hee Lee, Boem Ha Yi, Eung Jin Shin, Hae Kyung Lee, Hee Kyung Kim, Ho Jung Kim, Jae Hyung Choi, Young Soon Cho, Min-Jeong Kim, Dong Kyu Kim, Ji-Young Choe, Kyueng-Whan Min, Man Sup Lim, Sang Ook Ha, Sang Woo Lim, Youdong Sohn, Young Hwan Lee, Ji Hoon Park, Bon Seung Gu, Hye Seung Lee, Jae Hyuk Lee, Ji Ye Sim, Joonghee Kim, Kyoung Ho Lee, Kyuseok Kim, Soyeon Ahn, Sung-Bum Kang, Yoon Jin Lee, You Hwan Jo, Young Hoon Kim, Yousun Ko, Seung Joon Choi, Bohyung Song, Byung Ho Goh, Chaesuk Lim, Chang Rae Kim, Cho Rong Seo, Eunbaeck Kim, Gio Han, Jae-Hyug Woo, Jinhyun Kim, Kyoungjin Min, Min-A Lee, Min Ju Jeong, Min Kyoung Lee, Yong Su Lim, Young Sup Shim, Sung Bin Park, Chan Woong Kim, Dong Hoon Lee, Seung Eun Lee, Sung Eun Kim, Yoo Shin Choi, Sung Eun Rha, Eun Sun Jung, Gun Hyung Na, Han Joon Kim, Han Mo Yoo, Hye Kyung Chang, Joon Il Choi, Kyu Nam Park, Michael Yong Park, Moon Hyung Choi, Sang Hoon Oh, Seung Eun Jung, Sohee Lee, Soo Ah Im, Soo Hyun Kim, Soon Nam Oh, Tae Ho Hong, Won-Kyung Kang, Young Joon Lee, Young Hwan Lee, Dong Baek Kang, Hyun Soo Han, Jeong Woo Choi, Ki-Jung Yoon, Yong Hwang, Seong Sook Hong, Eui Sung Hwang, Heajin Chung, Hye Young Jang, Jiyoung Hwang, Jun Bum Park, Kyung Yul Hur, Yoon Mi Jeen, Young Joo Lee, Young Shin Cho, Han Jin Cho, Inyoung Choi, Jong Hak Park, Jooyeong Kim, Suk Keu Yeom, Sung Woo Moon, Young Sik Kim, Mi Sung Kim, Dong Hyuk Shin, Heon-Ju Kwon, Pil Cho Choi, Sang Kuk Han, Ji Young Woo, Gu Hyun Kang, Han Myun Kim, Hyun Young Choi, Ik Yang, Jae Ho Jang, Jeong Won Kim, Sang Nam Yoon, Won Hee Kim, Yong Soo Jang, Mi-Suk Park, In Cheol Park, Jae Gil Lee, Min Joung Kim, Yong Eun Chung, Jongmee Lee, Baek-Hui Kim, Chang Hee Lee, Jung-Youn Kim, Sanghee Kang, Sung-Hyuk Choi, Yang Shin Park, Seong Whi Cho, Chan Woo Park, Gi Bong Chae, Taek Guen Ohk, Yong-Hwan Jeon, Nurhee Hong, Dae Han Wi, Jun Hee Lee, Jung Nam Kwon, Seok Youn Lee, Weon-Cheol Han, Young Cheol Song, Mi Jeong Kim, Jung Hyeok Kwon, Seoung Kyu Beak, Sung Jin Kim, Woo Ik Choi, Yu Na Kang, Cheong-Il Shin, Dong Ho Lee, Gyeong Hoon Kang, Ijin Joo, Jeong Hee Yoon, Ji Won Park, Kyu Joo Park, Sang Do Shin, Seung-Bum Ryoo, Seung-Yong Jeong, Su Joa Ahn, Tae Han Kim, Won Chang, Yoon-Hye Kwon, Sang Soo Shin, Hee Joon Kim, Ho Goon Kim, Yong Soo Cho, Yoo Duk Choi, Bong Soo Kim, Chang Lim Hyun, Guk Myung Choi, In Ho Jeong, Kyeong Won Kang, Seung Hyoung Kim, Woo Jeong Kim, Young Joon Kang, Kwang Pyo Kim
BACKGROUND: CT radiation is arguably carcinogenic. Results from single-centre studies, mostly retrospective, have advocated lowering the CT radiation dose for the diagnosis of appendicitis. However, adoption of low-dose CT has been slow. We aimed to assess the effectiveness of low-dose CT compared with standard-dose CT in the diagnosis of appendicitis in adolescents and young adults. METHODS: We did this pragmatic, multicentre, randomised controlled non-inferiority trial at 20 South Korean teaching hospitals with little experience with low-dose CT...
September 11, 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28915443/cerebral-white-matter-hyperintensity-is-associated-with-intracranial-atherosclerosis-in-a-healthy-population
#5
Ki-Woong Nam, Hyung-Min Kwon, Han-Yeong Jeong, Jin-Ho Park, Sang Hyuck Kim, Su-Min Jeong, Tae Gon Yoo, Shinhye Kim
BACKGROUND AND AIMS: Cerebral white matter hyperintensity (WMH) is commonly found in ischemic stroke patients, especially when accompanied by intracranial atherosclerosis (ICAS). However, the relationship between WMH and ICAS in a healthy population has not been evaluated. METHODS: A total of 3159 healthy subjects who underwent health checkups, including brain magnetic resonance imaging and angiography, were enrolled. ICAS was defined as an occlusion or more than 50% stenosis of intracranial vessels on magnetic resonance angiography...
September 7, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28914751/magnetic-resonance-imaging-based-prostate-specific-antigen-density-for-prediction-of-gleason-score-upgrade-in-patients-with-low-risk-prostate-cancer-on-initial-biopsy
#6
Ki Choon Sim, Deuk Jae Sung, Kun Woo Kang, Kyung Sook Yang, Na Yeon Han, Beom Jin Park, Min Ju Kim, Sung Bum Cho
OBJECTIVE: The aim of this study was to assess the utility of prostate-specific antigen density (PSAD) calculated using magnetic resonance imaging for predicting Gleason score (GS) upgrade in patients with low-risk prostate cancer on biopsy. METHODS: Seventy-three patients were divided into 2 groups according to the concordance between biopsy and prostatectomy GS: group 1 (6/6) and group 2 (6/≥7). Magnetic resonance imaging-based PSAD, prostate volume, prostate-specific antigen (PSA), and age were compared between the 2 groups...
September 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28906310/endometrial-stromal-sarcoma-of-the-uterus-magnetic-resonance-imaging-findings-including-apparent-diffusion-coefficient-value-and-its-correlation-with-ki-67-expression
#7
Hai Ming Li, Jia Liu, Jin Wei Qiang, Wei Yong Gu, Guo Fu Zhang, Feng Hua Ma
OBJECTIVE: This study aimed to investigate the conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI) features of endometrial stromal sarcoma (ESS) including a preliminary investigation of the correlation between the apparent diffusion coefficient (ADC) value and Ki-67 expression. METHODS: The clinical and MRI data of 15 patients with ESS confirmed by surgery and pathology were analyzed retrospectively. The conventional MR morphological features, signal intensity on DWI, ADC value (n = 14), and clinicopathological marker Ki-67 (n = 13) were evaluated...
September 13, 2017: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/28903552/impact-of-body-mass-index-on-the-quality-of-life-after-total-gastrectomy-for-gastric-cancer
#8
Ki Bum Park, Ji Yeon Park, Seung Soo Lee, Oh Kyoung Kwon, Ho Young Chung, Wansik Yu
Purpose: We evaluated the impact of postoperative body mass index (BMI) shifts on the quality of life (QoL) following total gastrectomy in patients with gastric cancer. Methods and Methods: QoL data collected from the European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 and QLQ-STO22 questionnaires were obtained from 417 patients preoperatively and 1 year after surgery. Patients were divided into two groups based on changes in BMI: group 1 comprised patients whose BMI range category dropped, and group 2 included patients who maintained or rose to a higher category compared to their preoperative BMI category...
September 13, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28903358/mri-based-radiotherapy-planning-method-using-rigid-image-registration-technique-combined-with-outer-body-correction-scheme-a-feasibility-study
#9
Ki Mun Kang, Hoon Sik Choi, Bae Kwon Jeong, Jin Ho Song, In-Bong Ha, Yun Hee Lee, Chul Hang Kim, Hojin Jeong
An alternative pseudo CT generation method for magnetic resonance image (MRI)-based radiotherapy planning was investigated in the work. A pseudo CT was initially generated using the rigid image registration between the planning MRI and previously acquired diagnostic CT scan. The pseudo CT generated was then refined to have the same morphology with that of the referenced planning image scan by applying the outer body correction scheme. This method was applied to some sample of brain image data and the feasibility of the method was assessed by comparing dosimetry results with those from the current gold standard CT-based calculations...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28902791/initial-features-of-hepatic-metastases-from-pancreatic-cancer-histological-and-radiolographical-appraisal-of-hepatic-micrometastases-detected-by-real-time-fluorescent-imaging
#10
Tomohiro Katada, Hideki Hashidate, Naoyuki Yokoyama, Natsuru Sudo, Koko Mitsuma, Tetsuya Otani
OBJECTIVE: The pathophysiology of primary-stage hepatic metastases from gastrointestinal cancers may provide clues to their formation. We investigated initial features of hepatic metastases from pancreatic cancer by examining the histologies of radiographically occult hepatic micrometastases. METHODS: We examined 133 consecutive pancreatic cancer patients with no evident hepatic metastases on preoperative imaging. An indocyanine green near-infrared camera system was used to detect hepatic metastases during surgery; preoperatively acquired images of patients were then retrospectively reviewed...
October 2017: Pancreas
https://www.readbyqxmd.com/read/28902780/is-multifocality-an-indicator-of-aggressive-behavior-in-small-bowel-neuroendocrine-tumors
#11
Allen B Choi, Jessica E Maxwell, Kendall J Keck, Andrew J Bellizzi, Joseph S Dillon, Thomas M OʼDorisio, James R Howe
OBJECTIVES: Many patients with small bowel neuroendocrine tumors (SBNETs) have multifocal tumors (MFTs), but the frequency of MFTs has varied widely across SBNET studies. It is also unclear whether patients with MFTs have more advanced disease or worse clinical course than do those with unifocal SBNETs. We set out to determine the frequency of multifocal and unifocal SBNETs and compare clinicopathologic factors, somatostatin receptor 2 expression, and survival. METHODS: Clinicopathologic variables from 179 patients with surgically managed SBNETs were collected...
October 2017: Pancreas
https://www.readbyqxmd.com/read/28900220/diffusion-kurtosis-imaging-evaluating-epithelial-mesenchymal-transition-in-colorectal-carcinoma-xenografts-model-a-preliminary-study
#12
Huanhuan Liu, Wenbin Shen, Caiyuan Zhang, Yanfen Cui, Jinning Li, Tingting Zhang, Weibo Chen, Dengbin Wang
Epithelial-mesenchymal transition (EMT) plays an important role in aggravating invasiveness and metastatic behavior of colorectal cancer (CRC). Identification of EMT is important for structuring treatment strategy, but has not yet been studied by using noninvasive imaging modality. Diffusion kurtosis imaging (DKI) is an advanced diffusion weighted model that could reflect tissue microstructural changes in vivo. In this study, EMT was induced in CRC cells (HCT116) by overexpressing Snail1 gene. We aimed to investigate the value of DKI in identifying EMT in CRC and decipher the correlations between DKI-derived parameters and EMT biomarker E-cadherin and cell proliferative index Ki-67 expression...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899758/chronic-global-analysis-of-vascular-permeability-and-cerebral-blood-flow-after-bone-marrow-stromal-cell-treatment-of-traumatic-brain-injury-in-the-rat-a-long-term-mri-study
#13
Lian Li, Michael Chopp, Guangliang Ding, Qingjiang Li, Asim Mahmood, Quan Jiang
Vascular permeability and hemodynamic alteration in response to the transplantation of human bone marrow stromal cells (hMSCs) after traumatic brain injury (TBI) were longitudinally investigated in non directly injured and normal-appearing cerebral tissue using magnetic resonance imaging (MRI). Male Wistar rats (300-350g, n=30) subjected to controlled cortical impact TBI were intravenously injected with 1 ml of saline (at 6-hours or 1-week post-injury, n=5/group) or with hMSCs in suspension (∼3x10(6) hMSCs, at 6-hours or 1-week post-injury, n=10/group)...
September 9, 2017: Brain Research
https://www.readbyqxmd.com/read/28898048/dielectric-meta-holograms-enabled-with-dual-magnetic-resonances-in-visible-light
#14
Zile Li, Inki Kim, Lei Zhang, Muhammad Q Mehmood, Muhammad S Anwar, Murtaza Saleem, Dasol Lee, Ki Tae Nam, Shuang Zhang, Boris Luk'yanchuk, Yu Wang, Guoxing Zheng, Junsuk Rho, Cheng-Wei Qiu
Efficient transmission-type meta-holograms have been demonstrated using high-index dielectric nanostructures based on Huygens' principle. It is crucial that the geometry size of building blocks be judiciously optimized individually for spectral overlap of electric and magnetic dipoles. In contrast, reflection-type meta-holograms using the metal/insulator/metal scheme and geometric phase can be readily achieved with high efficiency and small thickness. Here, we demonstrate a general platform for design of dual magnetic resonance based meta-holograms based on the geometric phase using silicon nanostructures that are quarter wavelength thick for visible light...
September 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28895097/combination-therapies-for-primary-hepatic-neuroendocrine-carcinoma-a-case-report
#15
Richi Nakatake, Morihiko Ishizaki, Kosuke Matui, Hiroaki Yanagimoto, Kentaro Inoue, Masaki Kaibori, Yusai Kawaguchi, Masanori Kon
BACKGROUND: Primary hepatic neuroendocrine carcinomas are extremely rare. Because of the rarity of PHNEC, its clinical features and treatment outcomes are not well understood. A proper diagnosis and the correct therapeutic approach therefore remain clinically challenging. CASE PRESENTATION: A 67-year-old man was admitted to our department because of a liver tumor. Computed tomography revealed a single liver tumor 50 mm in diameter and located in the S3 region. Biopsy and imaging findings resulted in a diagnosis of primary hepatic neuroendocrine carcinoma...
September 11, 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28895082/clinical-manifestations-and-treatment-outcomes-of-parvovirus-b19-encephalitis-in-immunocompetent-adults
#16
Jin-Sun Jun, Jangsup Moon, Jung-Ick Byun, Jun-Sang Sunwoo, Jung-Ah Lim, Soon-Tae Lee, Keun-Hwa Jung, Kyung-Il Park, Ki-Young Jung, Manho Kim, Sang Kun Lee, Kon Chu
Parvovirus B19 (PVB19) has rarely been identified as a cause of encephalitis in immunocompetent adults, in whom clinical information regarding PVB19 encephalitis has remained unclear. Herein, we report the clinical presentations, laboratory and imaging findings, and treatment outcomes of five immunocompetent adults with PVB19 encephalitis. Although none of the patients showed any distinctive features of PVB19 infection, they showed various clinical manifestations, including one instance of brainstem involvement...
September 11, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28894897/peptide-receptor-radionuclide-therapy-prrt-in-european-neuroendocrine-tumour-society-enets-grade-3-g3-neuroendocrine-neoplasia-nen-a-single-institution-retrospective-analysis
#17
Sue Ping Thang, Mei Sim Lung, Grace Kong, Michael S Hofman, Jason Callahan, Michael Michael, Rodney J Hicks
PURPOSE: Grade 3 NENs are aggressive tumours with poor prognosis. PRRT+/- radiosensitising chemotherapy is a potential treatment for disease with high somatostatin receptor (SSTR) expression without spatially discordant FDG-avid disease. We retrospectively evaluated the efficacy of PRRT in G3 NEN. METHODS: Kaplan-Meier estimation was used to determine progression-free survival (PFS) and overall survival (OS) defined from start of PRRT. Subgroup analysis was performed for patients with Ki-67 ≤ 55% and >55%...
September 12, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28894865/transport-features-of-nano-hydroxylapatite-n-ha-embedded-silicone-rubber-sr-systems-influence-of-sr-n-ha-interaction-degree-of-reinforcement-and-morphology
#18
Bindu M, Unnikrishnan G
We report the transport characteristics of silicone rubber/nano-hydroxylapatite (SR/n-HA) systems at room temperature with reference to the effects of n-HA loading, morphology and penetrant nature, using toluene, xylene, ethyl acetate and butyl acetate in the liquid phase and methanol, ethanol, 1-propanol, 2-propanol and butanol in the vapour phase as probe molecules. The interaction between the n-HA particles and SR matrix has been confirmed by FTIR analysis. As the n-HA content in the SR matrix increased, the penetrant uptake has been found to decrease...
September 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28891902/nasal-deviation-in-patients-with-asymmetric-mandibular-prognathism
#19
Young-Min Shin, Sung-Tak Lee, Ki-Young Nam, Tae-Geon Kwon
PURPOSE: This study was aimed to evaluate the nasal deviation in patients with asymmetric mandibular prognathism. MATERIALS AND METHODS: Thirty-five patients with skeletal class III malocclusion were included in the study. Significant mandibular asymmetry of >4 mm menton deviation in three-dimensional (3D) reformatted cone beam computed tomography images was defined as asymmetry group (n = 20). Patients without mandibular asymmetry served as control group (n = 15)...
September 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28889720/presynaptic-dopaminergic-degeneration-in-a-patient-with-beta-propeller-protein-associated-neurodegeneration-documented-by-dopamine-transporter-positron-emission-tomography-images-a-case-report
#20
Min Ki Kim, Nan Young Kim, Sangkyoon Hong, Hyeo-Il Ma, Yun Joong Kim
No abstract text is available yet for this article.
September 12, 2017: Journal of Movement Disorders
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