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Liran Domachevsky, Natalia Goldberg, Hanna Bernstine, Meital Nidam, David Groshar
OBJECTIVES: To quantitatively characterize clinically significant intra-prostatic cancer (IPC) by prostate-specific membrane antigen (PSMA) expression and cell density on PSMA-11 positron emission tomography/magnetic resonance (PET/MR). METHODS: Retrospective study approved by the institutional review board with informed written consent obtained. Patients with a solitary, biopsy-proven prostate cancer, Gleason score (GS) ≥7, presenting for initial evaluation by PET/computerised tomography (PET/CT), underwent early prostate PET/MR immediately after PSMA-11 tracer injection...
May 30, 2018: European Radiology
Karl Fengler, Karl-Philipp Rommel, Stephan Blazek, Maximilian Von Roeder, Christian Besler, Christian Lücke, Matthias Gutberlet, Jennifer Steeden, Michael Quail, Steffen Desch, Holger Thiele, Vivek Muthurangu, Philipp Lurz
BACKGROUND: Most trials regarding catheter-based renal sympathetic denervation (RDN) describe a proportion of patients without blood pressure response. Recently, we were able to show arterial stiffness, measured by invasive pulse wave velocity (IPWV), seems to be an excellent predictor for blood pressure response. However, given the invasiveness, IPWV is less suitable as a selection criterion for patients undergoing RDN. Consequently, we aimed to investigate the value of cardiac magnetic resonance (CMR) based measures of arterial stiffness in predicting the outcome of RDN compared to IPWV as reference...
May 9, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
Yuhei Tokiwa, Hiromu Sakamoto, Takanori Takiue, Makoto Aratono, Colin D Bain, Hiroki Matsubara
Penetration of alkane molecules into the adsorbed film of a cationic surfacatnt gives rise to a surface freezing transition at the alkane-water interface upon cooling. In this paper, we show that surface freezing of cetyltrimethylammonium chloride (CTAC) at the tetradecane-water interface stabilizes oil-in-water (OW) emulsions. For concentrations of CTAC near the critical micelle concentration, an OW emulsion coalesced readily above the surface freezing transition whereas the OW emulsion was stable in the surface frozen state...
May 9, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Xue-Lu Chen, Huixian Zhang, Xian-Yan Huang, Jiu-Ju Feng, De-Man Han, Lu Zhang, Jian-Rong Chen, Ai-Jun Wang
Pt-based bimetallic nanostructures with low content of Pt were considered as one of the attractive nanocatalysts for their high Pt utilization efficiency, remarkable catalytic characters and cost-effectiveness in facilitating the sluggish cathodic reactions in fuel cells. Herein, three-dimensional Pt47 Ni53 nanopolyhedrons (NPHs) with abundant active sites were constructed by a facile one-pot solvothermal strategy, in which cytosine and cetyltrimethylammonium chloride (CTAC) worked as the co-structure directing agents...
April 13, 2018: Journal of Colloid and Interface Science
Zhuo-Neng Yu, Zheng Zhang, Zhi-Suo Lv, Meng-Ting Liu, Lu Zhang, Ai-Jun Wang, Liu-Ying Jiang, Jiu-Ju Feng
Pt-based bimetallic nanocrystals are feasible to dramatically improve the catalytic performances in fuel cells via morphology- and composition-engineering. Herein, bimetallic platinum69 -cobalt31 nanosheet nanoassemblies (Pt69 Co31 NSNSs) were facilely synthesized through a one-pot co-reduction solvothermal strategy in oleylamine (OAm), using cetyltrimethylammonium chloride (CTAC) and allantoin as the directing agents. The current synthesis highly depended on the critical concentrations of Pt and Co precursors, the combined use of allantoin to OAm as the co-reductant, and the use of proper allantoin concentration...
September 1, 2018: Journal of Colloid and Interface Science
Shuai Zhang, Qinfu Liu, Hongfei Cheng, Feng Gao, Cun Liu, Brian J Teppen
Intercalation and surface modification of clays with surfactants are the essential process to tailor the clays' surface chemistry for their extended applications. A full understanding of the interaction mechanism of surfactants with clay surfaces is crucial to engineer clay surfaces for meeting a particular requirement of industrial applications. In this study, the thermodynamic mechanism involved in the intercalation and surface modification of methanol preintercalated kaolinite by three representative alkane surfactants with different head groups, dodecylamine, cetyltrimethylammonium chloride (CTAC), and sodium stearate, were investigated using the adaptive biasing force accelerated molecular dynamics simulations...
April 27, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
Yoshitaka Inui, Takashi Ichihara, Masaki Uno, Masanobu Ishiguro, Kengo Ito, Katsuhiko Kato, Hajime Sakuma, Hidehiko Okazawa, Hiroshi Toyama
OBJECTIVE: Statistical image analysis of brain SPECT images has improved diagnostic accuracy for brain disorders. However, the results of statistical analysis vary depending on the institution even when they use a common normal database (NDB), due to different intrinsic spatial resolutions or correction methods. The present study aimed to evaluate the correction of spatial resolution differences between equipment and examine the differences in skull bone attenuation to construct a common NDB for use in multicenter settings...
March 19, 2018: Annals of Nuclear Medicine
Wen Chong Xin, Xiao Liang Shao, Yue Tao Wang, Jian Feng Wang, Xiao Song Wang, Ling Yang, Wei Yang, Fei Fei Zhang
OBJECTIVE: To evaluate whether computed tomography attention correction (CTAC) has incremental diagnostic value for single photon emission tomography (SPET) myocardial perfusion imaging (MPI) for the detection of coronary artery disease (CAD) in Chinese patients. SUBJECTS AND METHODS: This retrospective study consisted of 181 suspected CAD patients who underwent one-stop SPET examination by MPI combined with a CT scan. Two observers independently evaluated non-attenuation correction (NAC) and CTAC MPI images, and coronary angiography (CAG) results were used as reference standards...
January 2018: Hellenic Journal of Nuclear Medicine
Brenda R S de Araújo, José J Linares León
This study presents the results of the electrochemical degradation of the emulsifier cetrimonium chloride (CTAC) on a boron-doped diamond (BDD) anode under different current densities and flow rates. Higher values of these parameters result in a more rapid removal. Nevertheless, operation at low current reduces the required applied charge and increases the chemical oxygen demand (COD) removal efficiency, as there is less development of ineffective parasitic reactions. On the other hand, high flow rates reduce the required volumetric applied charge and increase the COD removal current efficiency...
May 15, 2018: Journal of Environmental Management
B Julie He, Brian J Malm, Michelle Carino, Mehran M Sadeghi
BACKGROUND: Myocardial perfusion imaging (MPI) often employs attenuation-correction computed tomography (CTAC) to reduce attenuation artifacts and improve specificity. While there is no specific guideline on how they should be reported, incidental noncardiac findings identified on these scans may be clinically significant. The prevalence of these findings in veterans is not currently known. In addition, variability in reporting these findings may depend on the interpreting physician's specialty...
February 28, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
Jei-Yie Huang, Ruoh-Fang Yen, Wen-Chung Lee, Chun-Kai Huang, Pei-Ying Hsu, Mei-Fang Cheng, Ching-Chu Lu, Yen-Hung Lin, Kuo-Liong Chien, Yen-Wen Wu
BACKGROUND: The benefits of attenuation correction (AC) in technetium-99m myocardial perfusion imaging (MPI) have been well established. However, the value of thallium (Tl-201) AC and routine computed tomography AC (CTAC) were less well established. The aims of this study were to evaluate the diagnostic performance of thallium (Tl-201) MPI with additional CTAC and to determine which participants would benefit most. METHODS AND RESULTS: A total of 108 consecutive patients who underwent Tl-201 MPI and received coronary angiography within 3 months were enrolled...
February 26, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
Savita Chaudhary, Priyanka Sharma, Arshpreet Kaur, Rajeev Kumar, S K Mehta
This manuscript represents the synthesis of silica nanoparticles modified with four different types of cationic surfactants. The surfactant capped nanoparticles have better control over the size of silica nanoparticles. The as formed as model nanomaterials were used for the removal of naphthalene, a simple white crystalline polycyclic aromatic hydrocarbon (PAH) from aqueous media. The obtained materials were characterized by various microscopic and spectroscopic techniques. The average particle size of nanoparticles was approximately between 50 and 75 nm...
May 1, 2018: Journal of Nanoscience and Nanotechnology
Hasib Hanif, Luc Dubois, Maral Ouzounian, Mark D Peterson, Ismail El-Hamamsy, Francois Dagenais, Ansar Hassan, Michael W A Chu
BACKGROUND: Frozen elephant trunk (FET) surgery offers a new alternative in the management of complex thoracic aortic aneurysms and dissections. We performed a systematic review and meta-analysis of comparator observational studies evaluating the efficacy of FET compared with conventional aortic arch surgery, primarily focusing on mortality and stroke as well as the secondary outcomes of spinal cord ischemia, major bleeding, and operative time. METHODS: We searched MEDLINE, EMBASE, PubMed, and the Cochrane Library for trials and studies comparing the FET technique with conventional surgery in patients with aortic aneurysms or dissections, or both...
March 2018: Canadian Journal of Cardiology
Jiu-Lin Song, Ming Li, Lu-Nan Yan, Jia-Yin Yang, Jian Yang, Li Jiang
BACKGROUND/AIMS: To investigate the association between tacrolimus (TAC) blood concentration and the risk of post-transplantation diabetes mellitus (PTDM) development after living donor liver transplantation (LDLT). METHODS: This study reviewed the clinical data of 158 adult LDLT recipients. A cut-off of mean trough concentration of TAC (cTAC) value at the sixth month postoperatively was identified using a receptor operating characteristic curve. Other clinical complications rates were compared between different cTAC groups...
March 2018: International Journal of Surgery
Na Liu, Yipeng Wang, Fei Ge, Shixiang Liu, Huaixian Xiao
The interaction of nanoparticles with coexisting chemicals affects the fate and transport of nanoparticles, as well as their combined effects on aquatic organisms. Here, we evaluated the joint effect of ZnO nanoparticle (nano-ZnO) and cetyltrimethyl ammonium chloride (CTAC) on the growth of Chlorella vulgaris and explored the possible mechanism. Results showed that an antagonistic effect of nano-ZnO and CTAC (0.1, 0.2 and 0.3 mg L-1 ) was found because CTAC stop nano-ZnO being broken down into solution zinc ions (Zn2+ )...
April 2018: Chemosphere
Maya Khalifé, Brice Fernandez, Olivier Jaubert, Michael Soussan, Vincent Brulon, Irène Buvat, Claude Comtat
In brain PET/MR applications, accurate attenuation maps are required for accurate PET image quantification. An implemented attenuation correction (AC) method for brain imaging is the single-atlas approach that estimates an AC map from an averaged CT template. As an alternative, we propose to use a zero echo time (ZTE) pulse sequence to segment bone, air and soft tissue. A linear relationship between histogram normalized ZTE intensity and measured CT density in Hounsfield units ([Formula: see text]) in bone has been established thanks to a CT-MR database of 16 patients...
September 21, 2017: Physics in Medicine and Biology
Takayuki Shibutani, Masahisa Onoguchi, Nanako Miyamoto, Yasushi Yamamoto, Seigo Kinuya
Brain perfusion SPECT has physical phenomena such as attenuation, scatter, and degradation of resolution that impair accuracy on data acquisition. Chang and CT methods have spread application for attenuation correction (AC) and indicate the utility of AC using a brain phantom without a bone or with a normal bone structure. However, nonuniform AC of an abnormal bone structure such as postoperative bone defect after burr-hole surgery has not yet been evaluated. Therefore, we evaluated the influence of nonuniform AC of an abnormal bone structure between the 2 AC methods...
September 2017: Journal of Nuclear Medicine Technology
Shimpei Ito, Akihiro Endo, Taiji Okada, Taku Nakamura, Takashi Sugamori, Nobuyuki Takahashi, Hiroyuki Yoshitomi, Kazuaki Tanabe
BACKGROUND: Cadmium-zinc-telluride (CZT) cameras have improved the evaluation of patients with chest pain. However, inferior/inferolateral attenuation artifacts similar to those seen with conventional Anger cameras persist. We added prone acquisitions and CT attenuation correction (CTAC) to the standard supine image acquisition and analyzed the resulting examinations. METHODS AND RESULTS: Seventy-two patients referred for invasive coronary angiography (CAG), and who also underwent rest/stress myocardial perfusion imaging (MPI) on a CZT camera in the supine and prone positions plus CTAC imaging, to examine known or suspected CAD between April 2013 and March 2014 were included...
October 2017: Annals of Nuclear Medicine
Subashchandrabose Thoka, Mahesh Madasu, Chi-Fu Hsia, Shu-Ya Liu, Michael H Huang
Copper nanocubes with average sizes of 82, 95, and 108 nm have been synthesized in an aqueous mixture of cetyltrimethylammonium chloride (CTAC) surfactant, copper acetate, and sodium ascorbate reductant heated at 100 °C for 40 min. Copper nanowires with an average length of 25 μm can also be prepared this way by simply increasing the volume of sodium ascorbate introduced. Small shifts in the plasmonic absorption band positions with tunable particle sizes have been observed. The copper nanocubes were employed to catalyze hydroboration of phenylacetylene and various substituted aryl alkynes with 100 % (E)-product selectivity and 82-95 % product yields...
September 5, 2017: Chemistry, An Asian Journal
Nobuhiro Yada, Hideo Onishi, Masahiro Miyai, Kentarou Ozasa, Takashi Katsube, Keiichi Onoda, Masuo Haramoto, Yasushi Yamamoto, Shuhei Yamaguchi, Hajime Kitagaki
PURPOSE: We evaluated the effect of resolution recovery (RR) using graph plots on regional cerebral blood flow (rCBF) in brain perfusion single-photon emission computed tomography (SPECT) images derived from healthy volunteers and patients diagnosed with probable Alzheimer's disease. METHOD: We acquired brain perfusion SPECT images with scatter correction (SC), computed tomography-based attenuation correction (CTAC), and RR from a three-dimensional brain phantom and from healthy volunteers...
August 2017: Annals of Nuclear Medicine
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