background and objective: sleep-disordered breathing (sdb) is associated with increased morbidity and mortality in patients with heart failure (hf). we assessed the prevalence and the pattern of sdb in hf patients who were candidates for heart transplantation. materials and methods: twenty heart transplantation patients with ventricular ejection-fraction < 25% were recruited consecutively in a ...

  Introduction: In patients with thyroid carcinoma, radiation absorbed doses of the thyroid and surrounding tissues is important to weigh risk and benefit considerations. In nuclear medicine, the accuracy of absorbed dose of internally distributed radionuclides is estimated by different methods such as MIRD and direct method using TLD. The aim of this study is using T...

The paper presents the values of conversion coefficients from operational quantity , HP( 10)/ to protection effective dose (E). were calculated in a number points located at depth 10 mm under surface torso computational model MIRD-5 body an adult . simulated irradiation conditions corresponded both uniform and sharply non-uniform employee fields photon radiation with energy 0.04 2 MeV It was de...

The aim was the validation of a platform for internal dosimetry, named MCID, based on patient-specific images and direct Monte Carlo (MC) simulations, radioembolization liver tumors with 90Y-labeled microspheres. CT real patients were used to create voxelized phantoms different density activity maps. SPECT acquisitions simulated by SIMIND MC code. Input macros GATE/Geant4 code generated loading...

Neurosurg 16: 378-418, 1969 20. EklSf B, Lassen NA, Nilsson L et al: Regional cerebral blood flow in the rat measured by the tissue sampling technique; a critical evaluation using four indicators C"-antipyrine, C"ethanol, H'-water and xenon". Acta Physiol Scand 91: 1-10, 1974 21. Eckman WW, Phair RD, Fenstermacher JD et al: Permeability limitation in estimation of local brain blood flow with (C...

A Monte Carlo shielding model for PET/CT clinics Robert L. Metzger and Kenneth A. Van Riper Radiation Safety Engineering, Inc Chandler, AZ Abstract Modern PET/CT clinics consist of a scanner room housing the double gantry PET/CT unit and a control area, two or more quiet rooms where patients rest prior to scanning, and a hot lab where doses are prepared. Of these areas, the scanner room, quiet ...

Background Heart failure (HF) in infants and children with congenital heart disease (CHD) is a crucial complication with different outcomes. Many biomarkers are used as prognostic indicators. Soluble ST2 (sST2) is one of these markers studied in adults with HF. We aimed to study the prognostic value of sST2 in CHD children with HF. Materials and Methods In current case-control study, thirty-six...

the present study aimed to assess changes in resting and maximum heart rates as primary indicators of cardiac autonomic function in metabolic syndrome (mets) patients and to determine their value for discriminating mets from non-mets. 468 participants were enrolled in this cross-sectional study and assessed according to the updated adult treatment panel iii (atp-iii) definition of mets. resting...