We compared DVHs （dose volume histograms） of two tangential irradiation techniques for whole breast RT （radiotherapy） CT （computed tomography） based 2D （two dimensional） technique with wedge filters and 3D CRT...We compared DVHs （dose volume histograms） of two tangential irradiation techniques for whole breast RT （radiotherapy） CT （computed tomography） based 2D （two dimensional） technique with wedge filters and 3D CRT （three dimensional conformal radiotherapy） with segmented fields. These two modalities are commonly used in external beam radiotherapy of breast cancer in Clinical Center Nis, Clinic of Oncology, Serbia. Therapy plans that employed two techniques were generated for eighteen patients. Dosimetric outcomes of each technique were investigated. The maximum dose of breast CTV was significantly reduced from 55.83 Gy for 2D to 54.1 Gy for 3D CRT. Also, the maximum dose of lung tissue decreased from 51.81 Gy for 2D to 49.61 Gy for 3D. The dose conformity and uniformity were much better with 3D CRT segmented field technique.展开更多
The aim of this study is to compare and discuss the efficacy of FDG PET/CT （fludeoxyglucose positron emission tomography/computated tomography） in the diagnosis, staging, prognosis, pre-therapeutic planning, therape...The aim of this study is to compare and discuss the efficacy of FDG PET/CT （fludeoxyglucose positron emission tomography/computated tomography） in the diagnosis, staging, prognosis, pre-therapeutic planning, therapeutic assessment and detecting recurrence of mesothelioma. Following method has been used： （1） Search setting on PubMed （by priority）： meta-analysis, randomized controlled trial, other study types; （2） The key words： ＂FDG PET/CT＂, ＂mesothelioma＂, ＂diagnosis＂, ＂staging＂, ＂prognosis＂, ＂therapeutic＂, ＂assessment＂ and ＂recurrences＂; （3） Review the literature that discusses the imaging modalities in the management of mesothelioma; （4） Create an evidence table; （5） Compare and discuss the different modalities and their sensitivity and specificity in managing mesothelioma; （6） Construct the passage reviewing the articles chosen. There is evidence that suggests that FDG PET/CT is superior to most other modalities in the diagnosis, staging, prognosis, pre-therapeutic planning, therapeutic assessment and detecting recurrence of mesothelioma. There are some close contenders like PET scan by itself as a modality to detect mesothelioma. However, due to the lack of anatomical presentation, there were many occurrences of misdiagnosis. FDG PET/CT, which superimposes functional imaging over the anatomical mapping, yields a more accurate presentation ofmesothelioma. The nature of this hybrid imaging enables diagnosis and management to be carried-out in a minimally invasive manner. PET/CT to a great extent has tranformed the way we diagnose neoplastic occurences heretofore. By amalgamating anatomic localization to functional imaging, this hybrid modality yields valuable information that was remotely attainable before. Although there are a few flaws to PET/CT that have been discussed in some studies, there is an apparent potential to this modality that is waiting to be uncovered. Evidently, PET/CT is highly effective in differentiating benign and malignant pleural lesion. Likewise, it is substantially useful in the management of mesothelioma particularly in the diagnosis, staging, prognosis, treatment, monitoring and detecting recurrences. With PET/CT having such adequacy in managing mesothelioma, it is imperative to acknowledge and further investigate this modality as a central tool in the management of the latter for the exclusive benefit of the patient.展开更多
The strontium modified waste FCC catalyst was prepared by magnetic stirring method and characterized by Xray diffractometry(XRD),UV-Vis diffuse reflectance spectrometry(DRS),X-ray photoelectron spectroscopy(XPS)and sc...The strontium modified waste FCC catalyst was prepared by magnetic stirring method and characterized by Xray diffractometry(XRD),UV-Vis diffuse reflectance spectrometry(DRS),X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM).Meanwhile,its photocatalytic denitrogenation performance was evaluated in terms of its ability to degrade the N-containing simulation oil under visible light.A mixture of strontium nitrate solution(with a concentration of 0.5 mol/L)and waste FCC catalyst was calcined at 400℃for 5 h prior to taking part in the photocatalytic denitrogenation reaction.The test results showed that the photocatalytic degradation rate of pyridine contained in simulation oil in the presence of the strontium modified FCC catalyst could reach 92.0% under visible light irradiation for 2.5 h.展开更多
This study focused on the identification of the filamentous fungi associated with soapstone samples exposed to outdoor conditions and the biocidal effect of gamma radiations on isolated fungal populations in Minas Ger...This study focused on the identification of the filamentous fungi associated with soapstone samples exposed to outdoor conditions and the biocidal effect of gamma radiations on isolated fungal populations in Minas Gerais State in Brazil. Two soapstone blocks were placed outdoors under tropical environmental conditions for 12 months. A total of 9 filamentous fungal populations were identified on their surfaces, namely Acremomium （cf.） alternatum, Alternaria alternata, Aspergillusfumigatus, Calcarisporium （cf.） arbuscula, Cladosporium cladosporioides, Curvularia lunata, Epicoccum nigrum, Fusarium equiseti and Penicillium citrinum. The gamma radiation assay was then carried out as a test of biocidal action by exposing all fungal populations to the ionizing radiation. The results showed that only the C. cladosporioides species was resistant to this biocidal agent, since it was able to increase its population post exposure. Scanning electron microscopy images identified the microbial colonization on the soapstone blocks and the stone elementar composition was analyzed by energy dispersive X-ray spectrometry. After treatment, there was no structural and aesthetic alteration in the soapstone samples, and evidencing that gamma radiation can be used as a biocidal agent. However, the resistance of the black fungal population indicates caution in the choice of gamma irradiation as biocidal treatment.展开更多
文摘We compared DVHs （dose volume histograms） of two tangential irradiation techniques for whole breast RT （radiotherapy） CT （computed tomography） based 2D （two dimensional） technique with wedge filters and 3D CRT （three dimensional conformal radiotherapy） with segmented fields. These two modalities are commonly used in external beam radiotherapy of breast cancer in Clinical Center Nis, Clinic of Oncology, Serbia. Therapy plans that employed two techniques were generated for eighteen patients. Dosimetric outcomes of each technique were investigated. The maximum dose of breast CTV was significantly reduced from 55.83 Gy for 2D to 54.1 Gy for 3D CRT. Also, the maximum dose of lung tissue decreased from 51.81 Gy for 2D to 49.61 Gy for 3D. The dose conformity and uniformity were much better with 3D CRT segmented field technique.
文摘The aim of this study is to compare and discuss the efficacy of FDG PET/CT （fludeoxyglucose positron emission tomography/computated tomography） in the diagnosis, staging, prognosis, pre-therapeutic planning, therapeutic assessment and detecting recurrence of mesothelioma. Following method has been used： （1） Search setting on PubMed （by priority）： meta-analysis, randomized controlled trial, other study types; （2） The key words： ＂FDG PET/CT＂, ＂mesothelioma＂, ＂diagnosis＂, ＂staging＂, ＂prognosis＂, ＂therapeutic＂, ＂assessment＂ and ＂recurrences＂; （3） Review the literature that discusses the imaging modalities in the management of mesothelioma; （4） Create an evidence table; （5） Compare and discuss the different modalities and their sensitivity and specificity in managing mesothelioma; （6） Construct the passage reviewing the articles chosen. There is evidence that suggests that FDG PET/CT is superior to most other modalities in the diagnosis, staging, prognosis, pre-therapeutic planning, therapeutic assessment and detecting recurrence of mesothelioma. There are some close contenders like PET scan by itself as a modality to detect mesothelioma. However, due to the lack of anatomical presentation, there were many occurrences of misdiagnosis. FDG PET/CT, which superimposes functional imaging over the anatomical mapping, yields a more accurate presentation ofmesothelioma. The nature of this hybrid imaging enables diagnosis and management to be carried-out in a minimally invasive manner. PET/CT to a great extent has tranformed the way we diagnose neoplastic occurences heretofore. By amalgamating anatomic localization to functional imaging, this hybrid modality yields valuable information that was remotely attainable before. Although there are a few flaws to PET/CT that have been discussed in some studies, there is an apparent potential to this modality that is waiting to be uncovered. Evidently, PET/CT is highly effective in differentiating benign and malignant pleural lesion. Likewise, it is substantially useful in the management of mesothelioma particularly in the diagnosis, staging, prognosis, treatment, monitoring and detecting recurrences. With PET/CT having such adequacy in managing mesothelioma, it is imperative to acknowledge and further investigate this modality as a central tool in the management of the latter for the exclusive benefit of the patient.
基金financially supported by the Science and Technology Project of Fujian Province(No.CE0015)the Ningde Normal University Project on Serving the Western Coast to the TW Strait(No.2010H103)the National-level College Students’ Innovative Entrepreneurial Training Plan Project of Fujian Normal University(Nos.201210394005 and 201310394015)
文摘The strontium modified waste FCC catalyst was prepared by magnetic stirring method and characterized by Xray diffractometry(XRD),UV-Vis diffuse reflectance spectrometry(DRS),X-ray photoelectron spectroscopy(XPS)and scanning electron microscopy(SEM).Meanwhile,its photocatalytic denitrogenation performance was evaluated in terms of its ability to degrade the N-containing simulation oil under visible light.A mixture of strontium nitrate solution(with a concentration of 0.5 mol/L)and waste FCC catalyst was calcined at 400℃for 5 h prior to taking part in the photocatalytic denitrogenation reaction.The test results showed that the photocatalytic degradation rate of pyridine contained in simulation oil in the presence of the strontium modified FCC catalyst could reach 92.0% under visible light irradiation for 2.5 h.
文摘This study focused on the identification of the filamentous fungi associated with soapstone samples exposed to outdoor conditions and the biocidal effect of gamma radiations on isolated fungal populations in Minas Gerais State in Brazil. Two soapstone blocks were placed outdoors under tropical environmental conditions for 12 months. A total of 9 filamentous fungal populations were identified on their surfaces, namely Acremomium （cf.） alternatum, Alternaria alternata, Aspergillusfumigatus, Calcarisporium （cf.） arbuscula, Cladosporium cladosporioides, Curvularia lunata, Epicoccum nigrum, Fusarium equiseti and Penicillium citrinum. The gamma radiation assay was then carried out as a test of biocidal action by exposing all fungal populations to the ionizing radiation. The results showed that only the C. cladosporioides species was resistant to this biocidal agent, since it was able to increase its population post exposure. Scanning electron microscopy images identified the microbial colonization on the soapstone blocks and the stone elementar composition was analyzed by energy dispersive X-ray spectrometry. After treatment, there was no structural and aesthetic alteration in the soapstone samples, and evidencing that gamma radiation can be used as a biocidal agent. However, the resistance of the black fungal population indicates caution in the choice of gamma irradiation as biocidal treatment.
