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Investigation of ionization chamber perturbation factors using proton beam and Fano cavity test for the Monte Carlo simulation code PHITS
The reference dose for clinical proton beam therapy is based on ionization chamber dosimetry. However, data on uncertainties in proton dosimetry are...
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Precise activity measurements of medical radionuclides using an ionization chamber: a case study with Terbium-161
Background161 Tb draws an increasing interest in nuclear medicine for therapeutic applications. More than 99% of the emitted gamma and X-rays of 161 Tb...
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Practical dosimetry procedure of air kerma for kilovoltage X-ray imaging in radiation oncology using a 0.6-cc cylindrical ionization chamber with a cobalt absorbed dose-to-water calibration coefficient
In this study, we implemented a practical dosimetry procedure of air kerma for kilovoltage X-ray beams using a 0.6-cc cylindrical ionization chamber,...
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Experimental determination of the effective point of measurement for cylindrical ionization chambers in megavoltage photon beams
Current dosimetry protocols specify an effective point of measurement (EPOM) shift of 0.6 r for a cylindrical ionization chamber in photon beams....
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Sphingosine-1-phosphate levels are inversely associated with left ventricular and atrial chamber volume and cardiac mass in men
AimsSphingosine-1-phosphate (S1P) is a signaling lipid, which is involved in several cellular processes including cell growth, proliferation,...
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Patient-specific quality assurance for proton depth dose distribution using a multi-layer ionization chamber in a single-ring wobbling method
The use of a multi-layer ionization chamber, Zebra, in patient-specific quality assurance (QA) for proton depth dose distributions in a single-ring...
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Half-value layer measurements using solid-state detectors and single-rotation technique with lead apertures in spiral computed tomography with and without a tin filter
Solid-state detectors (SSDs) may be used along with a lead collimator for half-value layer (HVL) measurement using computed tomography (CT) with or...
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Commissioning and dosimetric verification of volumetric modulated arc therapy for multiple modalities using electronic portal imaging device-based 3D dosimetry system: a novel approach
The purpose of this study was to validate an electronic portal imaging device (EPID) based 3-dimensional (3D) dosimetry system for the commissioning...
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Influence of distant scatterer on air kerma measurement in the evaluation of diagnostic X-rays using Monte Carlo simulation
The evaluation of the entrance surface dose (ESD) ensures safe radiation doses for X-ray imaging patients. The air kerma free-in-air value used to...
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In-target production of [11C]CH4 from a nitrogen/hydrogen gas target as a function of beam current, irradiation time, and target temperature
BackgroundProduction of [ 11 C]CH 4 from gas targets is notorious for weak performance with respect to yield, especially when using high beam currents....
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Small-field dosimetry with detector-specific output correction factor for single-isocenter stereotactic radiotherapy of single and multiple brain metastases
Recently, the International Atomic Energy Agency and the American Association of Physicists in Medicine reported correction factors (CFs) for...
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Characteristics of a real-time radiation exposure dosimetry system using a synthetic ruby for radiotherapy
Radiotherapy-related medical accidents are frequently caused by planning problems, excessive irradiation during radiotherapy, or patient movement....
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Characterization of ferrous-agarose-xylenol gel dosimeter at 60Co γ-rays beam therapy unit
Fricke gel dosimetry is a valuable technique used for recording 3D dose distribution in radiotherapy. Herein, we present the dosimetric...
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A novel VOC breath tracer method to evaluate indoor respiratory exposures in the near- and far-fields; implications for the spread of respiratory viruses
BackgroundSeveral studies suggest that far-field transmission (>6 ft) explains a significant number of COVID-19 superspreading outbreaks.
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Application of direct analysis in real-time mass spectrometry (DART-MS) in forensic science: a comprehensive review
BackgroundAs the rate of crime is constantly increasing, the workload on the forensic analyst also piles up. The availability of a limited number of...
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Modeling clothing as a secondary source of exposure to SVOCs across indoor microenvironments
BackgroundEvidence suggests that clothing can influence human exposure to semi-volatile organic compounds (SVOCs) through transdermal uptake and...
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Investigation of coagulation and proteomics profiles in symptomatic feline hypertrophic cardiomyopathy and healthy control cats
BackgroundHypertrophic cardiomyopathy (HCM) is a crucial heart disease in cats. The clinical manifestations of HCM comprise pulmonary edema, dyspnea,...
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The application of mass spectrometry imaging in traditional Chinese medicine: a review
Mass spectrometry imaging is a frontier technique which connects classical mass spectrometry with ion imaging. Various types of chemicals could be...
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Long-term stability of a three-dimensional dose verification system
Recently, the number of patients undergoing intensity-modulated radiation therapy and volumetric modulated arc therapy has increased with the...
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Matrix-assisted laser desorption/ionization mass spectrometry imaging to uncover protein alterations associated with the progression of IgA nephropathy
IgA nephropathy (IgAN) is one of the most diffuse glomerulonephrites worldwide, and many issues still remain regarding our understanding of its...
