Commissioning of a respiratory gating system involving a pressure sensor in carbon-ion scanning radiotherapy.

This study reports the commissioning methodology and results of a respiratory gating system [AZ - 733 V/733 VI (Anzai Medical Co., Japan)] using a pressure sensor in carbon-ion scanning radiotherapy. Commissioning includes choosing a location and method for pressure sensor installation, delay time measurement of the system, and the final flow test. Additionally, we proposed a methodology for the determination of a threshold level of generating an on/off gate for the beam to the respiratory waveform, which is important for clinical application. Regarding the location and method for installation of the pressure sensor, the actual person's abdomen, back of the body position, and supine/prone positioning were checked. By comparing the motion between the pressure sensor output and the reference LED sensor motion, the chest rear surface was shown to be unsuitable for the sensor installation, due to noise in the signal caused by the cardiac beat. Regarding delay time measurement of the system, measurements were performed for the following four steps: (a). Actual motion to wave signal generation; (b). Wave signal to gate signal generation; (c). Gate signal to beam on/off signal generation; (d). Beam on/off signal to the beam irradiation. The total delay time measured was 46 ms (beam on)/33 ms (beam off); these were within the prescribed tolerance time (
Source: Journal of Applied Clinical Medical Physics - Category: Physics Authors: Tags: J Appl Clin Med Phys Source Type: research

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Publication date: Available online 15 September 2019Source: Reactive and Functional PolymersAuthor(s): Muhammad Sohail, Binish Ashfaq, Iqra Azeem, Amir Faisal, Sema Yiyit Do─čan, Jianjun Wang, Hatice Duran, Basit YameenAbstractA convenient UV-curable coatings assisted surface functionalization strategy is presented to convert commodity Poly(propylene) (PP) films into diverse functional materials. To ensure a covalent integration between PP surface and functional UV-curable coatings, 3-(trimethoxysilyl) propyl acrylate (TMSPA) was functionalized on the surface of oxidized PP film. Two distinct UV-curable coatings differing ...
Source: Reactive and Functional Polymers - Category: Chemistry Source Type: research
Publication date: 25 November 2019Source: Journal of Industrial and Engineering Chemistry, Volume 79Author(s): Su-Un Lee, You-Jin Lee, Jeong-Rang Kim, Kwang-Eun Jeong, Soon-Yong JeongAbstractSilicoaluminophsophate (SAPO)-34 is considered as a promising catalyst for methanol-to-olefin (MTO) reaction, because its cylinder-like cages with small 8-ring pore openings restrict the diffusion of large hydrocarbons and exceptionally give high selectivity for light olefins. However, its main drawback is rapid catalytic deactivation by heavy hydrocarbons confined inside the cages. Here, we report a facile synthetic strategy for submi...
Source: Journal of Industrial and Engineering Chemistry - Category: Chemistry Source Type: research
We report the fabrication of bimetallic NiCo2Se4 and CoNi2Se4 nanostructures on nickel-foam (Ni-foam) substrates via a potentiostatic-deposition method by adjusting the molar ratio of Ni and Co metals. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses show that burl-like clusters with characteristic fluffy NiCo2Se4 and flake-like CoNi2Se4 hierarchical structures were deposited on the Ni-foam substrates. When used as battery-type electrodes in supercapacitors, both NiCo2Se4 and CoNi2Se4 electrodes exhibited outstanding capacity and good electrochemical properties. The CoNi2Se4 electrode ...
Source: Journal of Industrial and Engineering Chemistry - Category: Chemistry Source Type: research
Publication date: 15 January 2020Source: Journal of Alloys and Compounds, Volume 813Author(s): Yansheng Li, Cheng Qu, Jinhui Wang, Rui XuAbstractIn this paper, the solution-treated Mg–Y-Nd-Gd-Zr alloy was subjected to high pressure torsion (HPT) processing with 5 revolutions at room temperature, followed by aging at various temperatures and time periods. The aging behaviour of HPT-processed samples was systematically studied using X-ray diffraction (XRD) analysis, high resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) and hardness testing. We found that the optimal aging ...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
ConclusionsThese results provide evidence that the impaired cognitive flexibility of OCD may be associated with dysfunctions of the brain network from the dorsal caudate (DC) to important nodes of the salience network. Our results extend the neuropsychological model of OCD by showing intrinsically different associations between OCD and HC in functional network and cognitive flexibility.
Source: NeuroImage: Clinical - Category: Radiology Source Type: research
CONCLUSIONS: AAD does not appear to impact the mid-term outcomes in a cohort of subjects undergoing TAVI. PMID: 31522139 [PubMed - as supplied by publisher]
Source: The Journal of Invasive Cardiology - Category: Cardiology Tags: J Invasive Cardiol Source Type: research
Whenever we talk about IVF cycles, our focus is usually on the woman. This is understandable , because she's the one who has to take the injections, go for the scans, undergo the egg collection and embryo transfer process, and live through the 2 week wait. And all the husband needs to do is to give a semen sample !However, the reality is that the husband also suffers a lot of heartbreak and pain.This is especially acute when the reason for the infertility is a problem with his sperm. He feels very guilty that his wife is having to go through all the pain of an IVF cycle this because he's not able to get her pregnant i...
Source: Dr.Malpani's Blog - Category: Reproduction Medicine Source Type: blogs
Publication date: Available online 14 September 2019Source: Thermochimica ActaAuthor(s): Akihiko TodaAbstractThe recrystallization behavior of poly(ethylene terephthalate), PET, in the melting region was examined by Fast-Scan and Temperature-Modulated Calorimetry. In addition to the prior results of Fast-Scan Calorimetry, FSC, evidence that recrystallization caused double PET melting peaks was obtained. An exothermic recrystallization peak was directly observed in the second heating run of FSC after the lower-temperature melting peak was eliminated through rapid heating and cooling. FSC was then performed with a temperatur...
Source: Thermochimica Acta - Category: Chemistry Source Type: research
Publication date: 15 January 2020Source: Journal of Alloys and Compounds, Volume 813Author(s): Ahmad Bahmani, Srinivasan Arthanari, Kwang Seon ShinAbstractAn extruded Mg alloy was subjected to the screw rolling (SR) at different temperatures. The microstructure, corrosion behavior, and mechanical properties were analyzed. Electrochemical and immersion techniques were applied for corrosion behavior analysis. Moreover, scanning Kelvin probe force microscopy (SKPFM) was utilized to measure the surface Volta-potential. It was found that an increase in SR temperature decreased the strength by increasing the grain size and reduc...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
This study clearly demonstrates the excellent thermal insulation properties of the TBCs and shows that the thermal insulation performance can be significantly enhanced by increasing the thickness of the ceramic layer.
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
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