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https://www.readbyqxmd.com/read/29136805/the-characterization-of-natural-gemstones-using-non-invasive-ft-ir-spectroscopy-new-data-on-tourmalines
#1
Mariano Mercurio, Manuela Rossi, Francesco Izzo, Piergiulio Cappelletti, Chiara Germinario, Celestino Grifa, Maurizio Petrelli, Alessandro Vergara, Alessio Langella
Fourteen samples of tourmaline from the Real Museo Mineralogico of Federico II University (Naples) have been characterized through multi-methodological investigations (EMPA-WDS, SEM-EDS, LA-ICP-MS, and FT-IR spectroscopy). The samples show different size, morphology and color, and are often associated with other minerals. Data on major and minor elements allowed to identify and classify tourmalines as follows: elbaites, tsilaisite, schorl, dravites, uvites and rossmanite. Non-invasive, non-destructive FT-IR and in-situ analyses were carried out on the same samples to validate this chemically-based identification and classification...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29071673/high-dimensional-modeling-for-cytometry-building-rock-solid-models-using-gemstone%C3%A2-and-verity-cen-se-%C3%A2-high-definition-t-sne-mapping
#2
C Bruce Bagwell
This chapter outlines how to approach the complex tasks associated with designing models for high-dimensional cytometry data. Unlike gating approaches, modeling lends itself to automation and accounts for measurement overlap among cellular populations. Designing these models is now easier because of a new technique called high-definition t-SNE mapping. Nontrivial examples are provided that serve as a guide to create models that are consistent with data.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28844883/heavy-metal-tolerance-traits-of-filamentous-fungi-isolated-from-gold-and-gemstone-mining-sites
#3
Oluwatosin Gbemisola Oladipo, Olusegun Olufemi Awotoye, Akinyemi Olayinka, Cornelius Carlos Bezuidenhout, Mark Steve Maboeta
Increased environmental pollution has necessitated the need for eco-friendly clean-up strategies. Filamentous fungal species from gold and gemstone mine site soils were isolated, identified and assessed for their tolerance to varied heavy metal concentrations of cadmium (Cd), copper (Cu), lead (Pb), arsenic (As) and iron (Fe). The identities of the fungal strains were determined based on the internal transcribed spacer 1 and 2 (ITS 1 and ITS 2) regions. Mycelia growth of the fungal strains were subjected to a range of (0-100 Cd), (0-1000 Cu), (0-400 Pb), (0-500 As) and (0-800 Fe) concentrations (mgkg(-1)) incorporated into malt extract agar (MEA) in triplicates...
August 8, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28796078/preliminary-application-of-multiple-parameters-spectral-ct-in-the-diagnosis-of-ovarian-cancer
#4
Tao Pang, Zhao-di Liu, Kai Deng, Cheng-Qi Zhang, Guang-Li Wang
The aim of the study was to evaluate the effectiveness of spectral CT in the diagnosis of ovarian cancer. We retrospectively analyzed the data of 22 patients with spectral CT enhanced scan. The patients were divided into 2 groups: ovarian cancer group (n = 11) and benign tumor group (n = 11), according to the pathologic results. CT values at 40 keV, iodine concentration (IC), water concentration (WC) and spectral curve slope (λHU) of arterial phase and venous phase in the tumors of 2 groups were measured with gemstone spectral imaging (GSI) post-processing software...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28752310/impact-of-metal-artifact-reduction-software-on-image-quality-of-gemstone-spectral-imaging-dual-energy-cerebral-ct-angiography-after-intracranial-aneurysm-clipping
#5
Vincent Dunet, Martine Bernasconi, Steven David Hajdu, Reto Antoine Meuli, Roy Thomas Daniel, Jean-Baptiste Zerlauth
PURPOSE: We aimed to assess the impact of metal artifact reduction software (MARs) on image quality of gemstone spectral imaging (GSI) dual-energy (DE) cerebral CT angiography (CTA) after intracranial aneurysm clipping. METHODS: This retrospective study was approved by the institutional review board, which waived patient written consent. From January 2013 to September 2016, single source DE cerebral CTA were performed in 45 patients (mean age: 60 ± 9 years, male 9) after intracranial aneurysm clipping and reconstructed with and without MARs...
July 27, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28587323/clinical-relevance-of-gemstone-spectral-ct-in-the-diagnosis-of-carotid-atherosclerosis
#6
Jing-Jian Wang, Shu-Jie Fan, Long-Long Wang, Yan-Zhong Gao, Xiao-Juan Liu
A variety of imaging methods can be used in the diagnosis of atherosclerotic plaques. In the present study, we investigated the morphology and composition of atherosclerotic plaque associated with ischemic cerebral infarction by comparing gemstone spectral computed tomography (GSCT) and traditional multi-slice CT (MSCT). In total, 200 patients were enrolled and divided into the experimental group (n=100), which underwent GSCT, and the control group (n=100), which underwent MSCT. All the cases were followed up to observe disease outcomes in patients with different atherosclerotic plaque types, and adverse events in carotid artery stenosis or cerebral infarction were recorded...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28521008/gemstone-orchestrated-prioritization-of-human-germline-mutations-in-the-cloud
#7
Siwei Chen, Juan F Beltrán, Clara Esteban-Jurado, Sebastià Franch-Expósito, Sergi Castellví-Bel, Steven Lipkin, Xiaomu Wei, Haiyuan Yu
Integrative analysis of whole-genome/exome-sequencing data has been challenging, especially for the non-programming research community, as it requires simultaneously managing a large number of computational tools. Even computational biologists find it unexpectedly difficult to reproduce results from others or optimize their strategies in an end-to-end workflow. We introduce Germline Mutation Scoring Tool fOr Next-generation sEquencing data (GeMSTONE), a cloud-based variant prioritization tool with high-level customization and a comprehensive collection of bioinformatics tools and data libraries (http://gemstone...
May 18, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28420889/evaluation-of-urinary-stone-composition-and-differentiation-between-urinary-stones-and-phleboliths-using-single-source-dual-energy-computed-tomography
#8
Nanako Ogawa, Shuhei Sato, Kentaro Ida, Katsuya Kato, Yuichi Ariyoshi, Koichiro Wada, Yasutomo Nasu, Susumu Kanazawa
The aim of this study was to investigate the utility of single-source dual-energy computed tomography (SS-DECT) composition analysis in characterizing different types of urinary stones and differentiating them from phleboliths. This study included 29 patients with urinary stones who were scheduled for surgery. All patients were scanned, first using single-energy computed tomography acquisition and then DECT acquisition on SS-DECT. Dual-energy data were archived to a Gemstone spectral imaging (GSI) viewer (GE Healthcare, Milwaukee, WI, USA)...
April 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28411037/carotid-plaque-evaluation-using-gemstone-spectral-imaging-comparison-with-magnetic-resonance-angiography
#9
Yuki Shinohara, Makoto Sakamoto, Keita Kuya, Junichi Kishimoto, Eijiro Yamashita, Shinya Fujii, Masamichi Kurosaki, Toshihide Ogawa
BACKGROUND: The present study compared the applicability of computed tomography carotid plaque imaging using effective Z maps with gemstone spectral imaging (GSI) to that of magnetic resonance plaque imaging using 3-dimensional time-of-flight magnetic resonance angiography. METHODS: Stenosis was assessed in 18 carotid arteries of 14 patients, and the effective Z values of noncalcified carotid plaques were compared with the signal intensities of magnetic resonance angiography...
April 11, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28337891/screening-and-comparison-of-polychromatic-and-monochromatic-image-reconstruction-of-abdominal-arterial-energy-spectrum-ct
#10
COMPARATIVE STUDY
X P Wang, B Wang, P Hou, R Li, J B Gao
We screened the suitable image reconstruction to observe the abdominal artery and compare the quality between the polychromatic and the monochromatic reconstruction images of the abdominal artery spectrum CT. Eighty patients underwent Gemstone CT energy spectrum imaging to obtain an abdominal artery polychromatic image (140 kVp) and a monochromatic image from 40 ~ 140 keV. The CT value of region of interest (ROI) was measured on the polychromatic image and the single energy image. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the abdominal aorta and hepatic artery were determined...
January 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28321168/spectral-computed-tomography-in-advanced-gastric-cancer-can-iodine-concentration-non-invasively-assess-angiogenesis
#11
Xiao-Hua Chen, Ke Ren, Pan Liang, Ya-Ru Chai, Kui-Sheng Chen, Jian-Bo Gao
AIM: To investigate the correlation of iodine concentration (IC) generated by spectral computed tomography (CT) with micro-vessel density (MVD) and vascular endothelial growth factor (VEGF) expression in patients with advanced gastric carcinoma (GC). METHODS: Thirty-four advanced GC patients underwent abdominal enhanced CT in the gemstone spectral imaging mode. The IC of the primary lesion in the arterial phase (AP) and venous phase (VP) were measured, and were then normalized against that in the aorta to provide the normalized IC (nIC)...
March 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28267548/the-optimal-monochromatic-spectral-computed-tomographic-imaging-plus-adaptive-statistical-iterative-reconstruction-algorithm-can-improve-the-superior-mesenteric-vessel-image-quality
#12
Xiao-Ping Yin, Zi-Wei Zuo, Ying-Jin Xu, Jia-Ning Wang, Huai-Jun Liu, Guang-Lu Liang, Bu-Lang Gao
OBJECTIVE: To investigate the effect of the optimal monochromatic spectral computed tomography (CT) plus adaptive statistical iterative reconstruction on the improvement of the image quality of the superior mesenteric artery and vein. MATERIALS AND METHODS: The gemstone spectral CT angiographic data of 25 patients were reconstructed in the following three groups: 70KeV, the optimal monochromatic imaging, and the optimal monochromatic plus 40%iterative reconstruction mode...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28267528/non-small-cell-lung-cancer-spectral-computed-tomography-quantitative-parameters-for-preoperative-diagnosis-of-metastatic-lymph-nodes
#13
Fengfeng Yang, Jie Dong, Xiuting Wang, Xiaojiao Fu, Tong Zhang
OBJECTIVE: To investigate the application value of spectral computed tomography (CT)quantitative parameters for preoperative diagnosis of metastatic lymph nodes in patients with non-small cell lung cancer (NSLC). METHODS: 84 patients with suspected lung cancer who underwent chest dual-phase enhanced scan with gemstone spectral CT imaging (GSI) mode were selected. GSI quantitative parameters including normalized iodine concentrations (NIC), water concentration, slope of the spectral Hounsfield unit curve (λHU) were measured...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28242446/an-efficient-ionoluminescence-analysis-of-turquoise-gemstone-as-a-weakly-luminescent-mineral
#14
T Nikbakht, O Kakuee, M Lamehi-Rachti
The unique ionization pattern of MeV-energy ion beam is applied for efficient luminescence analysis of a collection of natural turquoise samples. The considerable penetration depth of tens of micrometer and enhancement of energy deposition with depth, suggests ionoluminescence as an appropriate technique for studying weakly luminescent minerals. Herein, the luminescence induced in deeper parts of turquoise samples is extracted through their relatively transparent adjacent host stones. The resulting intense spectra reveal the vibrational structure of the broad green luminescence band of turquoise which probably originates from O2(-) centers...
February 21, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28197873/ct-angiography-of-the-kidney-using-routine-ct-and-the-latest-gemstone-spectral-imaging-combination-of-different-noise-indexes-image-quality-and-radiation-dose
#15
COMPARATIVE STUDY
Yongxia Zhao, Yanmin Wu, Ziwei Zuo, Shujie Cheng
OBJECTIVE: The objective of our study was to compare the image quality and radiation dose of computed tomography angiography (CTA) of the kidney in patients with different body mass indexes using routine CT and the latest Gemstone Spectral Imaging (GSI) combination of different noise indexes (NI) with the adaptive statistical iterative reconstruction 2.0 algorithm (ASiR 2.0). METHODS: A total of 120 patients who had undergone a CTA of the kidney were divided into four groups (A, B, C and D), with 30 patients in each group...
May 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/27866516/-gsi-quantitative-parameters-preoperative-diagnosis-of-metastasis-lymph-nodes-in-lung-cancer
#16
Fengfeng Yang, Jie Dong, Xiaolong Yan, Xiuting Wang, Xiaojiao Fu, Tong Zhang
BACKGROUND: Mediastinal involvement in lung cancer is an important prognostic factor affecting survival, and accurate staging of the mediastinum lymph node correctly identifies patients who can benefit the most from surgery. The aim of this study is to investigate the value of dual-energy spectral computed tomography (DEsCT) imaging in differentiating metastatic from non-metastatic lymph nodes in lung cancer. METHODS: Forty-eight patients with non-small cell lung cancer (NSCLC) underwent arterial (AP) and portal venous (PP) phase contrast-enhanced DEsCT imaging followed by surgical treatment...
November 20, 2016: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/27834975/ce-3-doped-garnet-phosphors-composition-modification-luminescence-properties-and-applications
#17
REVIEW
Zhiguo Xia, Andries Meijerink
Garnets have the general formula of A3B2C3O12 and form a wide range of inorganic compounds, occurring both naturally (gemstones) and synthetically. Their physical and chemical properties are closely related to the structure and composition. In particular, Ce(3+)-doped garnet phosphors have a long history and are widely applied, ranging from flying spot cameras, lasers and phosphors in fluorescent tubes to more recent applications in white light LEDs, as afterglow materials and scintillators for medical imaging...
January 3, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/27824666/a-comparison-of-the-image-quality-and-radiation-dose-with-routine-computed-tomography-and-the-latest-gemstone-spectral-imaging-combination-of-different-scanning-protocols-in-computed-tomography-angiography-of-the-kidney
#18
COMPARATIVE STUDY
Yong-Xia Zhao, Hong-Na Suo, Zi-Wei Zuo, Ying-Jin Xu, Jin Chang
OBJECTIVE: The objective of our study was to compare the image quality and radiation dose of computed tomography angiography (CTA) of the kidney in patients with different body mass indexes using routine CT and the latest gemstone spectral imaging (GSI) combination of different scanning protocols with the adaptive statistical iterative reconstruction 2.0 algorithm. METHODS: A total of 90 patients who had undergone a CTA of the kidney were divided into 3 groups (A, B, and C), with 30 patients in each group...
March 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/27799426/the-ring-monstrance-from-the-loreto-treasury-in-prague-handheld-raman-spectrometer-for-identification-of-gemstones
#19
Jan Jehlička, Adam Culka, Markéta Baštová, Petr Bašta, Jaroslav Kuntoš
A miniature lightweight portable Raman spectrometer and a palm-sized device allow for fast and unambiguous detection of common gemstones mounted in complex jewels. Here, complex religious artefacts and the Ring Monstrance from the Loreto treasury (Prague, Czech Republic; eighteenth century) were investigated. These discriminations are based on the very good correspondence of the wavenumbers of the strongest Raman bands of the minerals. Very short laser illumination times and efficient collection of scattered light were sufficient to obtain strong diagnostic Raman signals...
December 13, 2016: Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/27760221/impaired-subset-progression-and-polyfunctionality-of-t-cells-in-mice-exposed-to-methamphetamine-during-chronic-lcmv-infection
#20
Uma Sriram, Beth L Hill, Jonathan M Cenna, Larisa Gofman, Nicole C Fernandes, Bijayesh Haldar, Raghava Potula
Methamphetamine (METH) is a widely used psychostimulant that severely impacts the host's innate and adaptive immune systems and has profound immunological implications. T cells play a critical role in orchestrating immune responses. We have shown recently how chronic exposure to METH affects T cell activation using a murine model of lymphocytic choriomeningitis virus (LCMV) infection. Using the TriCOM (trinary state combinations) feature of GemStone™ to study the polyfunctionality of T cells, we have analyzed how METH affected the cytokine production pattern over the course of chronic LCMV infection...
2016: PloS One
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