The Prognostic Value of Sequential F-FDG PET/CT Metabolic Parameters in Outcomes of Upper-Third Esophageal Squamous Cell Carcinoma Patients Treated with Definitive Chemoradiotherapy.

 The aim of this study is to determine prognostic values of sequential F-FDG PET/CT metabolic parameters in locally advanced esophageal squamous cell carcinoma (ESCC) patients treated with definitive chemoradiotherapy.  Forty locally advanced ESCC patients treated with definitive chemoradiotherapy (dCRT) who received pre-treatment F-FDG PET/CT (PET1) and 3-months post-treatment F-FDG PET/CT (PET2) were enrolled in the prospective study. F-FDG PET parameters of the primary tumor including maximum and mean standardized uptake values (SUVmax, SUVmean), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) were calculated on PET delineated primary tumor.

Pretreatment F-FDG PET/CT-Derived Parameters in Predicting Clinical Outcomes of Locally Advanced Upper Third Esophageal Squamous Cell Carcinoma After Definitive Chemoradiation Therapy.

Purpose: The aim of this study was to investigate whether standard uptake values (SUVs) of pretreatment F-FDG PET/CT were the surrogate parameters for predicting the outcomes in locally advanced esophageal squamous cell carcinoma patients treated with definitive chemoradiotherapy.

Materials And Methods: Sixty patients with esophageal squamous cell carcinoma underwent pretreatment F-FDG PET/CT and received definitive chemoradiotherapy. F-FDG metabolic parameters including SUVmax, SUVmean, SULpeak, total lesion glycolysis (TLG), and metabolic tumor volume (MTV) of primary tumor were calculated.

Gross alpha and gross beta activities in selected marine species in Vietnam.

The measured gross alpha and gross beta activities in the edible muscle tissues of eleven selected marine species along the coast of North Vietnam varied from 10.2 ± 1.5 to 73.

Radioactivity in wastes generated from shale gas exploration and production - North-Eastern Poland.

In the present study, the K-40, U-238, Ra-226, Pb-210, Ra-228 and Th-228 activity concentrations were measured in 64 samples of wastes generated from shale gas exploration in North-Eastern Poland. The measured samples consist of drill cuttings, solid phase of waste drilling muds, fracking fluids, return fracking fluids and waste proppants. The measured activity concentrations in solid samples vary in a wide range from 116 to around 1100 Bq/kg for K-40, from 14 to 393 Bq/kg for U-238, from 15 to 415 Bq/kg for Ra-226, from 12 to 391 Bq/kg for Pb-210, from a few Bq/kg to 516 Bq/kg for Ra-228 and from a few Bq/kg to 515 Bq/kg for Th-228.

Radon as a potential health hazard for clients and workers of selected thermal spas in Poland.

The radiation exposure due to 222Rn and its progeny inhalation for clients and employees of selected thermal water spas was assessed. The radon risk was calculated using the measured 222Rn activity concentrations in the investigated thermal waters and radon transfer coefficient, defined as a fraction of radon released from the swimming pool water to the indoor air of swimming pool. The total radon in air concentration was not measured.

Monte Carlo validation of the self-attenuation correction determination with the Cutshall transmission method in ²¹⁰Pb measurements by gamma-spectrometry.

The accuracy of estimation of the self-attenuation correction Cs with the Cutshall transmission method in (210)Pb measurements by gamma-spectrometry was assessed using the Monte Carlo method. The Cutshall method overestimates the correction for samples with linear attenuation coefficient at 46.5 keV higher than that of the standard and underestimates it in the opposite case.

Cs-137 in the natural environment of the Gorce Mountains (Poland).

Concentration of activity of Cs-137 and its spatial distribution in soils and lichen were determined in the Gorce Mts. (several hundred km) in S Poland. The authors distinguished two areas of the Gorce Mts.

Radium isotopes in the Polish Outer Carpathian mineral waters of various chemical composition.

The paper presents the activity concentrations of radium isotopes ((226)Ra, (228)Ra) and chemical compositions of above 70 mineral water samples collected from several dozens of springs and boreholes localized in the Polish Outer Carpathians. The activity concentrations of both radium isotopes clearly increase with the increase of water TDS, but decrease when the SO(4)(2-) content increases. These concentrations vary in the broad interval from a few to near 1000 mBq/L.

Leaching of technologically enhanced naturally occurring radioactive materials.

A form of waste associated with mining activities is related to the type of deposit being mined and to the procedure of exploitation and enrichment adopted. The wastes usually contain relatively large amounts of technologically enhanced naturally occurring radioactive materials (TENORM). The TENORM are often stored on the surface.