There are case reports of injuries caused by the radiation from interventional radiology (IVR) X-ray systems. Therefore, the management of radiation doses in IVR is important. However, no detailed report has evaluated image quality for a large number of IVR X-ray systems. As a result, it is unclear whether the image quality of the X-ray equipment currently used in IVR procedures is optimal. We ...

PURPOSE We aimed to evaluate the use of a dose monitoring program for calculating and comparing the diagnostic radiation doses in pediatric patients with neuroblastoma. METHODS We retrospectively reviewed diagnostic and therapeutic imaging studies performed on pediatric patients with neuroblastoma from 2003 to 2014. We calculated the mean effective dose per exam for X-ray, conventional comput...

Background/PurposeThis study determines and compares the geometric setup errors between stereoscopic x-ray kilo-voltage cone beam CT (CBCT) in phantom tests on a linear accelerator (linac) for image-guided (IG) stereotactic radiotherapy of intracranial tumors. Additionally, dose-volume metrics target volumes CBCT were evaluated.Materials/MethodsA Winston-Lutz- an anthropomorphic used. The mean ...

AIMS This study presents and evaluates the impact of a new lowest-dose fluoroscopy protocol (Siemens AG), especially designed for electrophysiology (EP) procedures, on X-ray dose levels. METHODS AND RESULTS From October 2014 to March 2015, 140 patients underwent an EP study on an Artis zee angiography system. The standard low-dose protocol was operated at 23 nGy (fluoroscopy) and at 120 nGy (...

Dynamic X-ray imaging systems are used for interventional cardiac procedures to treat coronary heart disease. X-ray settings are controlled automatically by specially-designed X-ray dose control mechanisms whose role is to ensure an adequate level of image quality is maintained with an acceptable radiation dose to the patient. Current commonplace dose control designs quantify image quality by p...

The present work deals with the radioactivity of samples of tin tailings collected from a mining site in Jos, Nigeria. The activity concentrations of the samples were measured using a gamma-ray spectrometer with a hyper-pure germanium detector. In situ dose rates at the site were also measured using a precalibrated survey meter. Potassium-40 was not detected in any of the studied samples. The a...

This cross-sectional study was designed to examine the prevalence of adrenocortical suppression in children with asthma treated with high-dose inhaled fluticasone propionate (FP). Children and adolescents (n=50) with asthma, treated with inhaled FP at a dose of > or = 1,000 mg a day for > or = 6 months, were enrolled. Early morning serum cortisol was performed. Subjects with a serum cortisol of...

Combinations of single doses of X-rays given locally to a transplanted tumor and single i.p. doses of cyclophosphamide (CY) were tested in mice bearing solid transplanted fibrosarcomas. The end points examined were growth delay and local control of the implanted tumor, the incidence of distant metastases, and survival times free of either local recurrence or metastases. Growth delay and local c...

This study compared the reproductive performance of sows that were submitted to cervical artificial insemination (CAI) using concentrations of 3.5 x 10 spermatozoa per dose or intrauterine artificial insemination (IUAI) with 2, 1, or 0.5 x 10 spermatozoa per dose. Within all treatments, females were inseminated either after conventional estrus detection or after ultrasound-guided ovulation diag...

Sensitivity calibration of imaging plates (IP) is important for quantitative measurements of intensity data obtained in various X-ray and gamma radiography experiments. To test the sensitivity of the IP (BAS2025) with the scanner (BAS5000) for higher photon energies, we have performed gamma exposure experimentsusing radionuclide (Co-57, Ba-133, Cs-137, Na-22 and Co-60). This provides useful inf...