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Guoxuan Qin, Yibo Zhang, Kuibo Lan, Lingxia Li, Jianguo Ma, Shihui Yu
A novel method of fabricating the flexible thin-film transistor based on single-crystalline Si nanomembrane (SiNM) with high-k Nb2O5-Bi2O3-MgO (BMN) ceramic gate dielectric on a plastic substrate is demonstrated in this paper. The SiNMs are successfully transferred to a flexible PET substrate, which has been plated indium-tin-oxide (ITO) conductive layer and high-k BMN ceramic gate dielectric layer by room-temperature magnetron sputtering. The BMN ceramic gate dielectric layer demonstrates as high as ~109 dielectric constant, with only dozens of pA current leakage...
March 22, 2018: ACS Applied Materials & Interfaces
Yuichi Nomura, Yoshitaka Asano, Jun Shinoda, Hirohito Yano, Yuka Ikegame, Tomohiro Kawasaki, Noriyuki Nakayama, Takashi Maruyama, Yoshihiro Muragaki, Toru Iwama
PURPOSE: The aim of this study was to assess whether dynamic PET with11 C-methionine (MET) (MET-PET) is useful in the diagnosis of brain tumors. METHODS: One hundred sixty patients with brain tumors (139 gliomas, 9 meningiomas, 4 hemangioblastomas and 8 primary central nervous system lymphomas [PCNSL]) underwent dynamic MET-PET with a 3-dimensional acquisition mode, and the maximum tumor MET-standardized uptake value (MET-SUV) was measured consecutively to construct a time-activity curve (TAC)...
March 21, 2018: Journal of Neuro-oncology
Neha Berry, Saroj Kant Sinha, Anish Bhattacharya, K K Prasad, Chetana Vaishnavi, Kim Vaiphei, Jayanta Samanta, Raghavendra Prasada, Narendra Dhaka, Rakesh Kochhar
BACKGROUND: Disease activity in ulcerative colitis (UC) is best assessed clinically by Mayo score. 18-Fluorodeoxyglucose positron emission tomography-computerized tomography (FDG PET-CT) is a noninvasive imaging technique to assess extent, disease activity and response to treatment of UC, especially in high risk population or patients unwilling for endoscopy. AIMS: We conducted a prospective observational study with the aim of assessing and correlating UC disease activity by clinical criteria, endoscopy, histology, serum and fecal biomarkers, and FDG PET-CT...
March 21, 2018: Digestive Diseases and Sciences
Garry Ceccon, Lazaros Lazaridis, Gabriele Stoffels, Marion Rapp, Manuel Weber, Tobias Blau, Phillip Lohmann, Sied Kebir, Ken Herrmann, Gereon R Fink, Karl-Josef Langen, Martin Glas, Norbert Galldiks
PURPOSE: We present our first clinical experience with O-(2-18 F-fluoroethyl)-L-tyrosine (FET) PET in patients with high-grade glioma treated with various neurooncological therapies including tumour-treating fields (TTFields) for the differentiation of tumour progression from treatment-related changes. METHODS: We retrospectively assessed 12 patients (mean age 51 ± 12 years, range 33-72 years) with high-grade glioma (11 glioblastomas, 1 gliosarcoma) in whom the treatment regimen included TTFields and who had undergone FET PET scans for differentiation of tumour progression from treatment-related changes...
March 21, 2018: European Journal of Nuclear Medicine and Molecular Imaging
Kerstin Zwirner, Daniela Thorwarth, René M Winter, Stefan Welz, Jakob Weiss, Nina F Schwenzer, Holger Schmidt, Christian la Fougère, Konstantin Nikolaou, Daniel Zips, Sergios Gatidis
PURPOSE: The purpose of this study was to demonstrate the feasibility of voxel-wise multiparametric characterization of head and neck squamous cell carcinomas (HNSCC) using hybrid multiparametric magnetic resonance imaging and positron emission tomography with [18 F]-fluorodesoxyglucose (FDG-PET/MRI) in a radiation treatment planning setup. METHODS: Ten patients with locally advanced HNSCC were examined with a combined FDG-PET/MRI in an irradiation planning setup...
March 21, 2018: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
Shunan Qi, May Y Huang, Yong Yang, Heiko Schöder, Sewit Teckie, Ariela Noy, Karen Chau, Joachim Yahalom
The role of [18 F]fluorodeoxyglucose (FDG) positron-emission tomography (PET) in mucosa-associated lymphoid tissue (MALT) of marginal zone lymphoma remains poorly defined. We correlated initial PET with pathology, clinical factors, and outcome. From January 2001 to July 2012, 173 MALT lymphoma patients with a biopsied lesion identified on PET within 90 days of tissue biopsy were analyzed. PET positivity and intensity of FDG uptake were correlated with clinical factors and patient outcome. Among 173 accrued cases, biopsied site was PET avid in 123 patients (71%); median standardized uptake value (SUV) was 6...
March 27, 2018: Blood Advances
Sayaka Kazami, Shingo Nishiyama, Yuji Kimura, Hiroyasu Itoh, Hideo Tsukada
BCPP compounds have been developed as PET imaging probes for neurodegenerative diseases in the living brain.18 F-BCPP-EF identifies damaged neuronal areas based on the lack of MC-I; however, its underlying mechanisms of action and specificity for MC-I remain unclear. We herein report the effects of BCPP-BF, -EF, -EM on MC-I in respiratory chain complexes using cardiomyocyte SMP. BCPP compounds inhibited the binding of3 H-dihydrorotenone to MC-I and the proton pumping activity of MC-I in a concentration-dependent manner in vitro...
March 18, 2018: Mitochondrion
Kathrin Kettenbach, Laura M Reffert, Hanno Schieferstein, Stefanie Pektor, Raphael Eckert, Matthias Miederer, Frank Rösch, Tobias L Ross
Within the last decade, several folate-based radiopharmaceuticals for Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET) have been evaluated; however, there is still a lack of suitable18 F-folates for clinical PET imaging. Herein, we report the synthesis and evaluation of two novel18 F-folates employing strain-promoted and copper-catalyzed click chemistry. Furthermore, the influence of both click-methods on lipophilicity and pharmacokinetics of the18 F-folates was investigated...
March 17, 2018: Pharmaceuticals
Ralph N Martins, Victor Villemagne, Hamid R Sohrabi, Pratishtha Chatterjee, Tejal M Shah, Giuseppe Verdile, Paul Fraser, Kevin Taddei, Veer B Gupta, Stephanie R Rainey-Smith, Eugene Hone, Steve Pedrini, Wei Ling Lim, Ian Martins, Shaun Frost, Sunil Gupta, Sid O'Bryant, Alan Rembach, David Ames, Kathryn Ellis, Stephanie J Fuller, Belinda Brown, Samantha L Gardener, Binosha Fernando, Prashant Bharadwaj, Samantha Burnham, Simon M Laws, Anna M Barron, Kathryn Goozee, Eka J Wahjoepramono, Prita R Asih, James D Doecke, Olivier Salvado, Ashley I Bush, Christopher C Rowe, Samuel E Gandy, Colin L Masters
Worldwide there are over 46 million people living with dementia, and this number is expected to double every 20 years reaching about 131 million by 2050. The cost to the community and government health systems, as well as the stress on families and carers is incalculable. Over three decades of research into this disease have been undertaken by several research groups in Australia, including work by our original research group in Western Australia which was involved in the discovery and sequencing of the amyloid-β peptide (also known as Aβ or A4 peptide) extracted from cerebral amyloid plaques...
2018: Journal of Alzheimer's Disease: JAD
Shigeki Hirano, Hitoshi Shinotoh, Hitoshi Shimada, Tsuneyoshi Ota, Koichi Sato, Noriko Tanaka, Ming-Rong Zhang, Makoto Higuchi, Kiyoshi Fukushi, Toshiaki Irie, Satoshi Kuwabara, Tetsuya Suhara
BACKGROUND: Alzheimer's disease (AD) is a neurodegenerative disorder characterized by chronic progressive cognitive decline and displays underlying brain cholinergic dysfunction, providing a rationale for treatment with cholinomimetic medication. The clinical presentations and courses of AD patients may differ by age of onset. OBJECTIVE: The objective of the present study was to illustrate the regional differences of brain acetylcholinesterase (AChE) activity as quantified by N-[11C]methylpiperidinyl-4-acetate ([11C]MP4A) and PET using parametric whole brain analysis and clarify those differences as a function of age...
March 16, 2018: Journal of Alzheimer's Disease: JAD
Kichang Kwak, Hyuk Jin Yun, Gilsoon Park, Jong-Min Lee
BACKGROUND: Alzheimer's disease (AD) and mild cognitive impairment (MCI) are age-related neurodegenerative diseases characterized by progressive loss of memory and irreversible cognitive functions. The hippocampus, a brain area critical for learning and memory processes, is especially susceptible to damage at early stages of AD. OBJECTIVE: We aimed to develop prediction model using a multi-modality sparse representation approach. METHODS: We proposed a sparse representation approach to the hippocampus using structural T1-weighted magnetic resonance imaging (MRI) and 18-fluorodeoxyglucose-positron emission tomography (FDG-PET) to distinguish AD/MCI from healthy control subjects (HCs)...
March 16, 2018: Journal of Alzheimer's Disease: JAD
Marcelo A Queiroz, Felipe de Galiza Barbosa, Carlos Alberto Buchpiguel, Giovanni Guido Cerri
The new technology of PET/MRI is a prototype of hybrid imaging, allowing for the combination of molecular data from PET scanning and morphofunctional information derived from MRI scanning. Recent advances regarding the technical aspects of this device, especially after the development of MRI-compatible silicon photomultipliers of PET, permitted an increase in the diagnostic performance of PET/MRI translated into dose reduction and higher imaging quality. Among several clinical applications, PET/MRI gains ground initially in oncology, where MRI per se plays an essential role in the assessment of primary tumors (which is limited in the case of PET/CT), including prostate, rectal and gynecological tumors...
January 2018: Revista da Associação Médica Brasileira
Frederique E C M Peeters, Manouk J W van Mourik, Steven J R Meex, Jan Bucerius, Simon M Schalla, Suzanne C Gerretsen, Casper Mihl, Marc R Dweck, Leon J Schurgers, Joachim E Wildberger, Harry J G M Crijns, Bas L J H Kietselaer
BASIK2 is a prospective, double-blind, randomized placebo-controlled trial investigating the effect of vitamin K2 (menaquinone-7;MK7) on imaging measurements of calcification in the bicuspid aortic valve (BAV) and calcific aortic valve stenosis (CAVS). BAV is associated with early development of CAVS. Pathophysiologic mechanisms are incompletely defined, and the only treatment available is valve replacement upon progression to severe symptomatic stenosis. Matrix Gla protein (MGP) inactivity is suggested to be involved in progression...
March 21, 2018: Nutrients
Hongyan Yin, Guobing Liu, Yan Xiu, Rongkui Luo, Hongcheng Shi
A 41-year-old woman presented with abdominal distention, inappetence, and rapid emaciation for 1 month. Diffuse bulky gastric wall thickening with lymph nodes enlargement and peritoneal nodules were revealed using abdominal CT. Staging F-FDG PET/CT performed after admission demonstrated intensely diffuse FDG uptake in stomach, FDG-avid lymph nodes, and peritoneal nodular lesions. Postoperatively, these lesions were diagnosed as diffuse large B-cell lymphoma.
March 20, 2018: Clinical Nuclear Medicine
Zhanli Fu, Meng Liu, Xueqi Chen, Xing Yang, Qian Li
A 36-year-old woman suffering from oral ulcerations, skin rash, and dyspnea was suspected of having paraneoplastic pemphigus. An F-FDG PET/CT was performed to detect the underlying neoplasms and revealed an F-FDG-avid mass in the lower right retroperitoneum. The mucocutaneous lesions and dyspnea were relieved after the tumor excision, and the pathology indicated Castleman disease.
March 20, 2018: Clinical Nuclear Medicine
Dayong Wu, Yujing Hu, Qiang Wei, Congna Tian, Yanzhu Bian
A CT scan was performed on a 67-year-old man newly diagnosed with acute pancreatitis. The scan revealed a low-density lesion in the liver, a left renal nodule, and a right renal cystic mass. Intense F-FDG uptake was observed in the liver lesion and left renal nodule. No abnormal uptake was observed in the right renal mass. In addition, another focal intense uptake was observed in segment VII of the liver. Biopsies revealed intrahepatic cholangiocarcinomas in the 2 liver lesions, papillary renal cell carcinoma in the left renal lesion and clear cell renal cell carcinoma in the right renal lesion...
March 20, 2018: Clinical Nuclear Medicine
Benjamin Wilson, Allison Becker, Thomas Estes, Jayanth Keshavamurthy, Darko Pucar
Distinguishing adrenal incidentalomas (5% of all abdominal CT scans) from metastasis is a frequent diagnostic challenge in primary malignancies with a propensity for adrenal spread, such as lung cancer. Adrenal myelolipoma and adenoma can be definitively characterized as benign by demonstrating gross and microscopic fat, respectively, on CT and MRI and an absence of abnormal uptake on PET. Unfortunately, adrenal sampling is frequently necessary in indeterminate cases for adequate staging of extra-adrenal primary malignancy...
March 20, 2018: Clinical Nuclear Medicine
Feibi Zeng, Munenobu Nogami, Taiichiro Shirai, Yoh Zen, Takamichi Murakami
Iron overload is a major complication in blood transfusion procedures. This report presents a case of malignant lymphoma, in which the findings of bone marrow involvement were discordant between F-FDG PET imaging studies and MRI with diffusion-weighted imaging studies. In this case, the PET imaging studies were positive for malignant lymphoma, whereas the MRI studies were negative. Iron deposition in the reticuloendothelial system due to posttransfusion iron overload was considered to be the cause of the decrease in signal intensity on diffusion-weighted imaging, resulting in a false-negative finding on MRI...
March 20, 2018: Clinical Nuclear Medicine
Hena S Ahmed, Austin R Pantel, James M Metz, John P Plastaras, Michael D Farwell
A 25-year-old man with IgA deficiency was treated with 2 months of chemotherapy and proton therapy for gastroesophageal junction adenocarcinoma. Restaging PET/CT 18 days posttherapy demonstrated 2 new foci of increased FDG uptake in the left hepatic lobe, which were favored to represent radiation injury as opposed to new metastases. Follow-up MRI with contrast 2 weeks later demonstrated hypoenhancement and T1/T2 hypointensity in the liver, without restricted diffusion, which correlated with the dominant FDG-avid focus...
March 20, 2018: Clinical Nuclear Medicine
Yan Hu, Yalan Liu, Hongcheng Shi
RATIONALE: Castleman disease is a rare lymphoproliferative disorder which etiology is unknown. It is divided into 2 subtypes: the plasma cell variant and the hyaline vascular variant. The most common site is the hilum of the lungs and mediastinum. Castleman disease is often ignored by clinicians because of not frequently encountering in clinical and the lower uptake of F-FDG. Here, we report a case of hepatocellular carcinoma accompanied by Castleman disease in the hilum of the liver, which was misdiagnosed as the lymph node metastasis in F-FDG PET/CT imaging...
March 2018: Medicine (Baltimore)
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