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https://www.readbyqxmd.com/read/28227429/characterization-of-normal-and-scarred-myocardium-based-on-texture-analysis-of-cardiac-computed-tomography-images
#1
S Antunes, A Esposito, A Palmisanov, C Colantoni, F de Cobelli, A Del Maschio, S Antunes, A Esposito, A Palmisanov, C Colantoni, F de Cobelli, A Del Maschio, A Del Maschio, C Colantoni, F De Cobelli, A Esposito, S Antunes
An accurate detection of myocardial scar using Cardiac CT may have a strong clinical impact; however, the main drawback is the insufficient contrast to noise ratio of delayed iodine enhanced (DIE) CT images, which makes its accurate segmentation (manual as well as automatic) difficult. In this work, we investigate texture parameters applied on the different scans in order to obtain the scans and features that best differentiates normal from scarred myocardium. The experiments on 7 cases of myocarditis show the accuracy of the parameter energy in all scans, as well as the good performance of the angiographic scan (having higher spatial resolution) with different parameters for the segmentation propose...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226249/micro-milling-of-spent-granular-activated-carbon-for-its-possible-reuse-as-an-adsorbent-remaining-capacity-and-characteristics
#2
Long Pan, Yuichi Takagi, Yoshihiko Matsui, Taku Matsushita, Nobutaka Shirasaki
We milled granular activated carbons (GACs) that had been used for 0-9 years in water treatment plants and produced carbon particles with different sizes and ages: powdered activated carbons (PAC, median diameter 12-42 μm), superfine PAC (SPAC, 0.9-3.5 μm), and submicron-sized SPAC (SSPAC, 220-290 nm). The fact that SPAC produced from 1-year-old GAC and SSPAC from 2-year-old GAC removed 2-methylisoborneol (MIB) from water with an efficiency similar to that of virgin PAC after a carbon contact time of 30 min suggests that spent GAC could be reused for water treatment after being milled...
February 14, 2017: Water Research
https://www.readbyqxmd.com/read/28226210/real-time-nanoscale-open-circuit-voltage-dynamics-of-perovskite-solar-cells
#3
Joseph L Garrett, Elizabeth M Tennyson, Miao Hu, Jinsong Huang, Jeremy N Munday, Marina S Leite
Hybrid organic-inorganic perovskites based on methylammonium lead iodide (MAPbI3) are an emerging material with great potential for high-performance and low-cost photovoltaics. However, for perovskites to become a competitive and reliable solar cell technology, their instability and spatial variation must be understood and controlled. While the macroscopic characterization of the devices as a function of time is very informative, a nanoscale identification of their real-time local optoelectronic response is still missing...
February 22, 2017: Nano Letters
https://www.readbyqxmd.com/read/28226192/carbazole-linked-nir-aza-bodipy-dyes-as-triplet-sensitizers-and-photoacoustic-contrast-agents-for-deep-tissue-imaging
#4
Nagaiyan Sekar, Ramaiah D, Yogesh Gawale, Adarsh N, Joseph J, M Pramanik, S K Kalva
Four novel N-ethylcarbazole linked aza-BODIPY dyes (8a-b and 9a-b) were synthesized and characterized. The presence of N-ethylcarbazole moiety shifts their absorption and fluorescence spectra to the near-infrared region, ca. 650-730 nm, of electromagnetic spectra. These dyes possess strong molar absorptivity in the range of 3-4 x 104 M-1cm-1 with low fluorescence quantum yields. The triplet excited state as well as singlet oxygen generation of these dyes were enhanced upon iodination at the core position. The core iodinated dyes 9a-b showed excellent triplet quantum yield of ca...
February 22, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28226001/recombinant-human-tsh-versus-thyroid-hormone-withdrawal-in-adjuvant-therapy-with-radioactive-iodine-of-patients-with-papillary-thyroid-carcinoma-and-clinically-apparent-lymph-node-metastases-not-limited-to-the-central-compartment-cn1b
#5
Pedro Weslley Rosario, Gabriela Franco Mourão, Maria Regina Calsolari
Objective: To compare the short- and long-term outcomes of adjuvant therapy with radioactive iodine (RAI) preceded by the administration of recombinant human TSH (rhTSH) versus thyroid hormone withdrawal (THW) in patients with papillary thyroid carcinoma and clinically apparent lymph node metastases not limited to the central neck compartment (cN1b). Subjects and methods: The sample consisted of 178 cN1b patients at intermediate risk who underwent total thyroidectomy with apparently complete tumor resection [including postoperative ultrasonography (US) without anomalies] and who received adjuvant therapy with RAI (30-100 mCi) preceded by the administration of rhTSH (n = 91) or THW (n = 87)...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28225999/radioactive-iodine-refractory-differentiated-thyroid-cancer-an-uncommon-but-challenging-situation
#6
Angelica Schmidt, Laura Iglesias, Michele Klain, Fabián Pitoia, Martin J Schlumberger
Radioiodine (RAI)-refractory thyroid cancer is an uncommon entity, occurring with an estimated incidence of 4-5 cases/year/million people. RAI refractoriness is more frequent in older patients, in those with large metastases, in poorly differentiated thyroid cancer, and in those tumors with high 18-fluordeoxyglucose uptake on PET/CT. These patients have a 10-year survival rate of less than 10%. In recent years, new therapeutic agents with molecular targets have become available, with multikinase inhibitors (MKIs) being the most investigated drugs...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28225997/intrathoracic-stomach-mimicking-bone-metastasis-from-thyroid-cancer-in-whole-body-iodine-131-scan-diagnosed-by-spect-ct
#7
Francisco Javier García-Gómez, Pablo Antonio de la Riva-Pérez, Cinta Calvo-Morón, Cristina Buján-Lloret, Teresa Cambil-Molina, Juan Castro-Montaño
The whole-body iodine-131 scintigraphy is an imaging technique in monitoring patients with a history of thyroid cancer. Although the rate of false positives is negligible, it is not nonexistent. We report the case of an intervened and treated patient for thyroid cancer with good clinical and biochemical response. Scintigraphic findings were consistent with unsuspected bone metastasis. Fused SPECT/CT data allowed accurate diagnosis of giant diaphragmatic hernia associated with intrathoracic stomach, a very rare pathology that can lead to false positive results...
February 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28225687/reducing-iodine-contrast-volume-in-ct-angiography-of-the-abdominal-aorta-using-integrated-tube-potential-selection-and-weight-based-method-without-compromising-image-quality
#8
Rogerio Vasconcelos, Terri J Vrtiska, Thomas A Foley, Thanila A Macedo, Juan C Montoya Cardona, Eric E Williamson, Cynthia H McCollough, Joel G Fletcher
OBJECTIVE: The purpose of this study is to determine whether image quality was maintained when a weight-based protocol incorporating tube potential selection was used to select lower iodine contrast volumes for aortic CT angiography (CTA). MATERIALS AND METHODS: Patients with potentially decreased renal function underwent CTA performed with the iodinated contrast volume determined using a table incorporating different tube potentials and patient weights. The image quality of CTA examinations performed with a reduced iodine volume (hereafter known as "low-iodine CTA examinations"), internal control CTA examinations (i...
March 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28225619/charge-transfer-induced-para-selective-sp2-c-h-bond-activation-of-arenes-by-use-of-a-hypervalent-iodine-compound-a-theoretical-study
#9
Jiyang Zhao, Shuhua Li
The reaction mechanism of the C-H bond activation of toluene promoted by the hypervalent iodine compound TIPP-I(OH)OTs was investigated in detail by density functional theory calculations. Our calculations show that a plausible reaction pathway of the C-H bond activation of toluene contains two stages: (1) the ligand exchange process on TIPP-I(OH)OTs, involving the substitution of the hydroxyl group and tosyloxyl group with TfOH; (2) the C-H bond activation of toluene promoted by the hypervalent iodine center with the assistance of the triflate anion...
February 22, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28224279/np-59-test-for-preoperative-localization-of-primary-hyperaldosteronism
#10
Marcello Di Martino, Iñigo García Sanz, Jose Luis Muñoz de Nova, Cristina Marín Campos, Miguel Martínez Martín, Luis Domínguez Gadea
PURPOSE: Adrenal venous sampling is generally considered the gold standard to identify unilateral hormone production in cases of primary hyperaldosteronism. The aim of this study is to evaluate whether the iodine-131-6-β-iodomethyl-19-norcholesterol (NP-59) test may represent an alternative in selected cases. METHODS: Patients submitted to laparoscopic adrenalectomy for suspected primary hyperaldosteronism (n = 27) were retrospectively reviewed. When nuclear medicine tests were preoperatively performed, their results were compared with the histopathologic findings and clinical improvement...
February 21, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28224278/the-need-of-prophylactic-central-lymph-node-dissection-is-controversial-in-terms-of-postoperative-thyroglobulin-follow-up-of-patients-with-cn0-papillary-thyroid-cancer
#11
Mehmet Hakan Korkmaz, Bülent Öcal, Güleser Saylam, Erman Çakal, Ömer Bayır, Esra Tutal, Emel Çadallı Tatar
PURPOSE: The objective of this study was to investigate whether prophylactic central lymph node dissection (pCLND) facilitates postoperative thyroglobulin (Tg) follow-up in the patients with papillary thyroid carcinoma (PTC). We also questioned whether radioactive iodine (RAI) remnant ablation provides any further advantage in this regard. METHODS: The records of patients with low-intermediate risk PTC who underwent either only total thyroidectomy (TT) or TT in conjunction with pCLND were reviewed...
February 21, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28224254/iodine-deficiency-status-in-the-who-eastern-mediterranean-region-a-systematic-review
#12
REVIEW
Masoumeh Mohammadi, Fereidoun Azizi, Mehdi Hedayati
Iodine deficiency is a global public health issue because iodine plays a major role in the thyroid hormone synthesis and is essential for normal neurological development. This review summarizes the publications on iodine status in the WHO Eastern Mediterranean Region (EMR) countries. All related studies available in main national and international databases were systematically searched using some specific keywords to find article published between 1909 and 2015. The prevention of iodine deficiency disorders (IDDs) in the WHO EMR countries is currently under control without significant side effects...
February 21, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28224033/distribution-and-risk-factors-associated-with-intestinal-parasite-infections-among-children-with-gastrointestinal-disorders
#13
Hamed Kiani, Ali Haghighi, Roya Salehi, Eznollah Azargashb
AIM: Prevalence and risk factors associated with intestinal parasites among children ≤ 12 years old in Nahavand county western Iran, was the objective of this search. BACKGROUND: Intestinal parasites (IPs) are important health problems among most societies. METHODS: This cross sectional study was carried out during 6 months from April to September 2014 in Nahavand County western Iran. Fecal samples were collected from 500 children suffering from gastrointestinal disorders (GIDs) and examined by macroscopy and microscopic (using saline and iodine wet mount, formalin-ether sedimentation, Trichrome and modified Ziehl Neelsen staining) methods...
December 2016: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/28222967/clinical-implications-of-microscopic-extrathyroidal-extension-in-patients-with-papillary-thyroid-carcinoma
#14
Ji Su Park, Jae Won Chang, Lihua Liu, Seung-Nam Jung, Bon Seok Koo
BACKGROUND: Extrathyroidal extension (ETE) is a poor prognostic factor in papillary thyroid carcinoma (PTC). However, the impact of the degree of ETE, especially microscopic ETE, has not been well established. The purpose of present study was to compare differences in clinicopathological characteristics and clinical outcomes according to the presence or extent of ETE. METHODS: Data from 381 patients who underwent total thyroidectomy with/without lymph node (LN) dissection for PTC between 2004 and 2010 were analyzed...
February 17, 2017: Oral Oncology
https://www.readbyqxmd.com/read/28222819/reliability-of-thyroglobulin-in-serum-compared-with-urinary-iodine-when-assessing-individual-and-population-iodine-nutrition-status
#15
Stig Andersen, Paneeraq Noahsen, Louise Westergaard, Peter Laurberg
The occurrence of thyroid disorders relies on I nutrition and monitoring of all populations is recommended. Measuring I in urine is standard but thyroglobulin in serum is an alternative. This led us to assess the reliability of studies using serum thyroglobulin compared with urinary I to assess the I nutrition level and calculate the number of participants needed in a study with repeated data sampling in the same individuals for 1 year. Diet, supplement use and life style factors were assessed by questionnaires...
February 22, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28222585/relevance-of-iodine-nutrition-to-health-in-the-21st-century
#16
John H Lazarus
No abstract text is available yet for this article.
April 2017: Minerva Medica
https://www.readbyqxmd.com/read/28222107/transcriptional-response-to-131i-exposure-of-rat-thyroid-gland
#17
Nils Rudqvist, Johan Spetz, Emil Schüler, Toshima Z Parris, Britta Langen, Khalil Helou, Eva Forssell-Aronsson
Humans are exposed to 131I in medical diagnostics and treatment but also from nuclear accidents, and better knowledge of the molecular response in thyroid is needed. The aim of the study was to examine the transcriptional response in thyroid tissue 24 h after 131I administration in rats. The exposure levels were chosen to simulate both the clinical situation and the case of nuclear fallout. Thirty-six male rats were i.v. injected with 0-4700 kBq 131I, and killed at 24 h after injection (Dthyroid = 0.0058-3...
2017: PloS One
https://www.readbyqxmd.com/read/28221698/monoprotected-l-amino-acid-l-mpaa-accelerated-bromination-chlorination-and-iodination-of-c-sp2-h-bonds-by-iridium-iii-catalysis
#18
Subban Kathiravan, Ian A Nicholls
Halogenated arenes are important structural motifs commonly found in biologically active molecules and used for a variety of transformations in organic synthesis. Herein, we report the mono-protected L-amino acid (L-MPAA) accelerated iridium(III) catalyzed halogenation of (hetero)anilides at room temperature. This reaction constitutes the first example of an iridium(III)/L-MPAA catalyzed general halogenation of (hetero)arenes through C(sp2)-H activation. Furthermore, we demonstrate the potential utility of our method through its use in the synthesis a quinolone derivative...
February 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28221390/improving-the-electrical-properties-of-carbon-nanotubes-with-interhalogen-compounds
#19
Dawid Janas, Karolina Z Milowska, Paul D Bristowe, Krzysztof K K Koziol
The electronic properties of carbon nanostructures such as carbon nanotubes (CNTs) or graphene can easily be tuned by the action of various doping agents. We present an experimental study and numerical analysis of how and why metallic and semiconductive CNTs can be p-doped by exposing them to two interhalogens: iodine monochloride and iodine monobromide. Simple application of these compounds was found to reduce the electrical resistance by as much as 2/3 without causing any unfavorable chemical modification, which could disrupt the highly conductive network of sp(2) carbon atoms...
February 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28220998/self-assembly-of-iodine-in-superfluid-helium-droplets-halogen-bonds-and-nanocrystals
#20
Yunteng He, Jie Zhang, Lei Lei, Wei Kong
We present evidence of halogen bond in iodine clusters formed in superfluid helium droplets based on results from electron diffraction. Iodine crystals are known to form layered structures with intralayer halogen bonds, with interatomic distances shorter than the sum of the van der Waals radii of the two neighboring atoms. The diffraction profile of dimer dominated clusters embedded in helium droplets reveals an interatomic distance of 3.65 Å, much closer to the value of 3.5 Å in iodine crystals than to the van der Waals distance of 4...
February 21, 2017: Angewandte Chemie
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