keyword
MENU ▼
Read by QxMD icon Read
search

Tc 99

keyword
https://www.readbyqxmd.com/read/28229896/-99-m-tc-mebrofenin-hepatobiliary-scintigraphy-in-a-patient-with-a-bilio-pleural-bronchial-fistula
#1
V Marín-Oyaga, K Cohen-Castillo, C Gutierrez-Villamil, S Arevalo-Leal
No abstract text is available yet for this article.
February 17, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28221786/chemical-trends-in-solid-alkali-pertechnetates
#2
Jamie Weaver, Chuck Z Soderquist, Nancy M Washton, Andrew S Lipton, Paul L Gassman, Wayne W Lukens, Albert A Kruger, Nathalie A Wall, John S McCloy
Insight into the solid-state chemistry of pure technetium-99 ((99)Tc) oxides is required in the development of a robust immobilization and disposal system for nuclear waste stemming from the radiopharmaceutical industry, from the production of nuclear weapons, and from spent nuclear fuel. However, because of its radiotoxicity and the subsequent requirement of special facilities and handling procedures for research, only a few studies have been completed, many of which are over 20 years old. In this study, we report the synthesis of pure alkali pertechnetates (sodium, potassium, rubidium, and cesium) and analysis of these compounds by Raman spectroscopy, X-ray absorption spectroscopy (XANES and EXAFS), solid-state nuclear magnetic resonance (static and magic angle spinning), and neutron diffraction...
February 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28219209/-value-of-99-tc-m-mdp-spect-ct-in-clinical-decision-making-for-nasopharyngeal-carcinoma-and-a-comparison-of-the-values-of-different-imaging-techniques-for-diagnosing-skull-base-bone-invasion
#3
W Li, R S Zhang, L Q Zhang, B G Lu, W H Fu
Objective: To analyze the clinical value of SPECT/CT in diagnosis of skull base bone invasion and clinical decision-making for nasopharyngeal carcinoma (NPC), and to compare their diagnostic value with SPECT/CT, CT, MRI, and MRI combined with SPECT (MRI-SPECT) for skull base bone invasion. Methods: Before treatment, among 348 newly diagnosed NPC patients, CT scan was performed in 186 patients (group A) and the remaining 162 patients received MRI scan (group B). Clinical doctors then made clinical management decisions according to the CT or MRI results...
February 23, 2017: Zhonghua Zhong Liu za Zhi [Chinese Journal of Oncology]
https://www.readbyqxmd.com/read/28216520/examination-of-some-factors-affected-right-to-left-shunt-rate-and-the-normal-value-of-right-to-left-shunt-rate-in-lung-perfusion-scintigraphy
#4
Fumitoshi Nakamura, Masafumi Okabe, Takaaki Ono, Yousuke Sugimura, Naoko Muromoto, Ryou Suzuki, Taketoshi Okawada
PURPOSE: Diagnosis for right-to-left shunt was determined by the assessment of shunt-rate, which was obtained by using (99 m)Tc-macroaggregated albumin. However, it is difficult to diagnose right-to-left shunt, using the normal level of shunt-rate measured by using conventional methods. To solve this problem, we investigated ourselves the normal level of shunt-rate. METHOD: We researched 20 patients with pulmonary embolism, and they didn't have right-to-left shunt...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28212051/-99m-tc-mag3-image-wisely
#5
Andrew T Taylor, Russell D Folks, A K M Fazlur Rahman, Aruna Polsani, Eva V Dubovsky, Raghuveer Halkar, Amita Manatunga
Purpose To determine if commonly administered doses of technetium 99m ((99m)Tc) mertiatide (MAG3) in the range of 300-370 MBq (approximately 8-10 mCi) contribute to image interpretation and justify the resulting radiation exposure. Materials and Methods The respective institutional review boards approved this HIPAA-compliant study and waived informed consent. Baseline and furosemide (99m)Tc-MAG3 imaging examinations in 50 patients suspected of having renal obstruction and 48 patients suspected of having renovascular hypertension (RVH) were randomly selected from archived databases and were independently scored by three experienced readers without access to 2-second flow images...
February 17, 2017: Radiology
https://www.readbyqxmd.com/read/28188015/sensitivity-and-negative-predictive-value-for-sentinel-lymph-node-biopsy-in-women-with-early-stage-cervical-cancer
#6
Gloria Salvo, Pedro T Ramirez, Charles F Levenback, Mark F Munsell, Elizabeth D Euscher, Pamela T Soliman, Michael Frumovitz
OBJECTIVE: The role of sentinel lymph node (SLN) biopsy alone for staging of early-stage cervical cancer remains controversial. We aimed to determine the validity of this technique in women with early-stage cervical cancer. METHODS: We retrospectively reviewed women with early-stage cervical cancer who underwent SLN mapping followed by complete pelvic lymphadenectomy as part of initial surgical management from August 1997 through October 2015. All modes of surgical approach were included...
February 7, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28187392/reductive-immobilization-of-pertechnetate-in-soil-and-groundwater-using-synthetic-pyrite-nanoparticles
#7
Lijuan Huo, Wenbo Xie, Tianwei Qian, Xiaohong Guan, Dongye Zhao
Radioactive technetium ((99)Tc) is of intense concern because of its toxicity and high mobility in the environment. Reduction of Tc(VII) to Tc(IV) decreases the mobility and availability of technetium in soil and groundwater. In this study, pyrite nanoparticles (FeS2) were synthesized, characterized and tested for immobilizing/removing (99)Tc(VII) in soil and groundwater through batch and column experiments. Influences of particle dosage, dissolved organic matter (DOM), and pH on the reductive immobilization kinetics were examined...
February 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28181084/vermicompost-as-a-natural-adsorbent-evaluation-of-simultaneous-metals-pb-cd-and-tetracycline-adsorption-by-sewage-sludge-derived-vermicompost
#8
Xin He, Yaxin Zhang, Maocai Shen, Ye Tian, Kaixuan Zheng, Guangming Zeng
The simultaneous adsorption of heavy metals (Pb, Cd) and organic pollutant (tetracycline (TC)) by a sewage sludge-derived vermicompost was investigated. The maximal adsorption capacity for Pb, Cd, and TC in a single adsorptive system calculated from Langmuir equation was 12.80, 85.20, and 42.94 mg L(-1), while for mixed substances, the adsorption amount was 2.99, 13.46, and 20.89 mg L(-1), respectively. The adsorption kinetics fitted well to the pseudo-second-order model, implying chemical interaction between adsorbates and functional groups, such as -COOH, -OH, -NH, and -CO, as well as the formation of organo-metal complexes...
February 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28181032/comprehensive-evaluation-of-chemiluminescent-immunoassays-for-the-laboratory-diagnosis-of-clostridium-difficile-infection
#9
A Makristathis, I Zeller, D Mitteregger, M Kundi, A M Hirschl
For the microbiological diagnosis of a Clostridium (C.) difficile infection (CDI), a two-test algorithm consisting of a C. difficile glutamate dehydrogenase (GDH)-immunoassay followed by a toxin-immunoassay in positive cases is widely used. In this study, two chemiluminescent immunoassays (CLIAs), one for GDH and the other for the toxins A and B, have been evaluated systematically using appropriate reference methods. Three-hundred diarrhoeal stool specimens submitted for CDI diagnosis were analysed by the LIAISON CLIAs (DiaSorin)...
February 8, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28171870/methylene-tetrahydrofolate-reductase-mthfr-rs868014-polymorphism-regulated-by-mir-1203-associates-with-risk-and-short-term-outcome-of-ischemic-stroke
#10
Wei He, Minzhi Lu, Guoqing Li, Zhigang Sun, Dinghua Liu, Lujun Gu
BACKGROUND/AIMS: Genetic polymorphisms of methylene tetrahydrofolate reductase (MTHFR) were associated with ischemic stroke risk. This study analyzed MTHFR polymorphisms at the 3'-untranslated region for association with risk and outcome of ischemic stroke in a Chinese Han population. METHODS: 500 patients and 600 healthy volunteers were enrolled for MTHFR rs868014 genotyping identified bioinformatically. The binding of miR-1203 to MTHFR rs868014 was determined by luciferase assay, MTHFR expression was assessed using qRT-PCR, and plasma homocysteine levels were assayed by ELISA...
February 8, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28159228/isobaric-dilution-analysis-as-a-calibration-tool-for-long-lived-radionuclides-in-icp-ms
#11
David Clases, Marvin Birka, Michael Sperling, Andreas Faust, Uwe Karst
A novel quantification method named isobaric dilution analysis (IBDA) is introduced for internal calibration using inductively coupled plasma mass spectrometry (ICP-MS). Unlike isotope dilution analysis (IDA), where a sample to be analysed for a target analyte element is spiked with an isotopically enriched solution of the same element, IBDA uses the fact that conventional mass analysers cannot distinguish between two isobaric isotopes of different elements. Therefore, in IBDA, the sample with the element of interest is spiked with a solution of a different element, which shares at least one isobaric isotope and shows similar chemical properties resulting in a similar response...
March 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28154015/potential-ways-to-address-shortage-situations-of-mo-99-tc-99m
#12
Leah Filzen, Lacey Ellingson, Andrew Paulsen, Joseph Hung
: Technetium 99m (Tc-99m) is the most common radioisotope used in nuclear medicine, which is produced in a nuclear reactor from the decay of molybdenum-99 (Mo-99). There are only a few aging nuclear reactors around the world that produce Mo-99 and one of the major contributors, the NRU (National Research Universal, Canada), will cease production on October 31, 2016. The NRU produces approximately 40% of the world's Mo-99 supply, so with its impending shut down, shortages of Mo-99/Tc-99m are expected...
February 2, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/28151075/association-of-snps-from-il1a-il1b-and-il6-genes-with-human-cytomegalovirus-infection-among-pregnant-women
#13
Wioletta Izabela Wujcicka, Jan Szczęsny Wilczyński, Dorota Ewa Nowakowska
The study was aimed to estimate the role and prevalence rates of genotypes, haplotypes, and alleles, located within the single-nucleotide polymorphisms (SNPs) of interleukin (IL) 1A, IL1B, and IL6 genes, in the occurrence and development of human cytomegalovirus (HCMV) infection among pregnant women. A research was conducted in 129 pregnant women, out of whom, 65 were HCMV infected and 64 were age-matched control uninfected individuals. HCMV DNA was quantitated for UL55 gene by the real-time Q PCR in the body fluids...
February 2, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28130707/topography-of-the-sentinel-node-according-to-the-affected-lobe-in-lung-cancer
#14
J M Galbis-Caravajal, A Lafuente-Sanchis, M Estors-Guerrero, N Martinez-Hernández, C Fuster-Diana, A Cremades, Á Zúñiga
PURPOSE: The objective of this study is to describe the anatomic location of the sentinel lymph node (SLN) of patients with lung carcinoma and to analyze its relationship with the characteristics of the tumor. PATIENTS AND METHODS: 98 Stage I lung cancer patients were included in the study. SLN was marked just after performing the thoracotomy by injecting peritumorally 0.25 mCi of nanocolloid of albumin (Nanocol1) labeled with Tc-99 m in 0.3 ml, and later, it was resected...
January 27, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28130029/qrs-fragmentation-case-report-and-review-of-the-literature
#15
Edgar Illescas-González, Diego Araiza-Garaygordobil, Jorge Daniel Sierra Lara, Aristoteles Ramirez-Salazar, Carlos Sierra-Fernández, Erick Alexanderson-Rosas
: Fragmentation of QRS complex (QRSf) is an easily evaluable, non-invasive electrocardiographic parameter that represents depolarization anomalies and that has been associated to several adverse outcomes such as sudden death, fibrosis, arrhythmic burden and worse prognosis in different conditions, including coronary artery disease (CAD). We present the case of a 69-year old male referred for study with symptoms of chronic stable angina. His electrocardiogram showed sinus rhythm, absence of Q waves, but the presence of QRSf in the inferior leads and V4-V6...
January 24, 2017: Archivos de Cardiología de México
https://www.readbyqxmd.com/read/28123260/musculoskeletal-oncogenic-osteomalacia-an-experience-from-a-single-centre-in-south-india
#16
Anil Satyaraddi, Kripa Elizabeth Cherian, Sahana Shetty, Nitin Kapoor, Felix K Jebasingh, Vinoo Mathew Cherian, Julie Hephzibah, Anne Jennifer Prabhu, Nihal Thomas, Thomas V Paul
BACKGROUND: Oncogenic osteomalacia is an acquired form of hypophosphatemic osteomalacia where the tumour resection may lead to cure of the disease. Tumours originating from the musculoskeletal region form an important subgroup of oncogenic osteomalacia. METHODS: This was a retrospective study conducted at a tertiary care centre in south India where we analyzed the hospital records of all the patients with musculoskeletal oncogenic osteomalacia from January 2010-April 2016...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28101172/adenosine-triphosphate-stress-99m-tc-methoxyisobutylisonitrile-gated-myocardial-perfusion-imaging-efficacy-in-diagnosing-stent-restenosis-following-coronary-stent-implantation
#17
Pengfei Zhang, Song Chen, Yang Li, Qiuhong Du, Lijuan Wang, Yingxian Sun, Yaming Li
Coronary stent restenosis rate following implantation is considerably high. The adenosine stress gated myocardial perfusion imaging (G-MPI) method has been widely used in the diagnosis, risk stratification and prognosis evaluation of coronary heart disease; however, the high cost of adenosine limits its clinical application. The aim of the present study was to investigate the efficacy of adenosine triphosphate (ATP) stress (99m)Tc-methoxyisobutylisonitrile ((99m)Tc-MIBI) G-MPI for diagnosis in-stent restenosis following coronary stent implantation...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28096314/exposure-to-recycled-uranium-contaminants-in-gaseous-diffusion-plants
#18
Jeri L Anderson, A Iulian Apostoaei, James H Yiin, Chih-Yu Tseng
As part of an ongoing study of health effects in a pooled cohort of gaseous diffusion plant workers, organ dose from internal exposure to uranium was evaluated. Due to the introduction of recycled uranium into the plants, there was also potential for exposure to radiologically significant levels of (99)Tc, (237)Np and (238,239)Pu. In the evaluation of dose response, these radionuclide exposures could confound the effect of internal uranium. Using urine bioassay data for study subjects reported in facility records, intakes and absorbed dose to bone surface, red bone marrow and kidneys were estimated as these organs were associated with a priori outcomes of interest...
January 16, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28081195/assessment-of-volumetric-versus-manual-measurement-in-disseminated-testicular-cancer-no-difference-in-assessment-between-non-radiologists-and-genitourinary-radiologist
#19
Çiğdem Öztürk, Ton Velleman, Alphons H H Bongaerts, L M Bergman, Robert J van Ginkel, Jourik A Gietema, Harald J Hoekstra
BACKGROUND: The aim of this study was to assess the feasibility and reproducibility of semi-automatic volumetric measurement of retroperitoneal lymph node metastases in testicular cancer (TC) patients treated with chemotherapy versus the standardized manual measurements based on RECIST criteria. METHODS: 21 TC patients with retroperitoneal lymph node metastases of testicular cancer were studied with a CT scan of chest and abdomen before and after cisplatin based chemotherapy...
2017: PloS One
https://www.readbyqxmd.com/read/28051295/long-term-immobilization-of-technetium-via-bioremediation-with-slow-release-substrates
#20
Laura Newsome, Adrian Cleary, Katherine Morris, Jonathan R Lloyd
Radionuclides are present in groundwater at contaminated nuclear facilities with technetium-99, one of the most mobile radionuclides encountered. In situ bioremediation via the generation of microbially reducing conditions has the potential to remove aqueous and mobile Tc(VII) from groundwater as insoluble Tc(IV). However, questions remain regarding the optimal methods of biostimulation and the stability of reduced Tc(IV) phases under oxic conditions. Here, we selected a range of slow-release electron donor/chemical reduction based substrates available for contaminated land treatment, and assessed their potential to stimulate the formation of recalcitrant Tc(IV) biominerals under conditions relevant to radioactively contaminated land...
January 24, 2017: Environmental Science & Technology
keyword
keyword
107018
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"