Background: The Shielding methods in radiotherapy due to delivering an accurate radiation dose to cancer tissues and avoiding unnecessary dose to normal tissues are very important. These methods include Lead standard blocks, individual molding and multi leaf collimator (MLC). The MLC method is not still common in Iran radiotherapy centers. Individual molding is better than the lead block shield...

Manuscript ID: 20160100. Received in: 08/16/2016. Approved in: 01/31/2017. ABSTRACT: This work presents the investigation in an environment that contains uranium deposits by using Pb isotope signatures. The study area, southeast of Brazil, is characterized by the lack of surface water and, as a consequence, the groundwater plays an important role in the econo‐ my of the region, such as the supp...

60 consecutive patients (mean age: 80,7 yrs; s.d.: 6,1 yrs; range 70-94 yrs) referred to a geriatric medicine department with syncope or dizziness were proposectively compared with 40 age and sex matched controls. A battery of non-invasive investigations including tilt-test, glycemia, 12 lead ecg., eeg, 24 hour ambulatory ecg recording,. M--mode echocardiogram and cervical Doppler velocimetry w...

AIMS To evaluate the feasibility and follow-up results of atrial lead implantation and a change to dual chamber pacing following long-term treatment with single chamber ventricular stimulation. METHODS AND RESULTS During a 30-month period, 70 consecutive patients with ventricular pacemakers were referred for pulse generator exchange or lead reoperation. Using defined criteria, an upgrade proc...

Introduction Phosphate-Induced Metal Stabilization (PIMS) using Apatite II stabilizes a wide range of metals, especially Pb, Cd, Zn, U and Pu, in situ or ex situ, by chemically binding them into new stable phosphate phases and other low-solubility phases that are stable over geologic time. The concept resulted from paleochemical oceanographic and chemostratigraphic studies, in the 1970s and 198...

OBJECTIVE We derived a clinical decision rule for determining which young children need testing for lead poisoning. We developed an equation that combines lead exposure self-report questions with the child's census-block housing and socioeconomic characteristics, personal demographic characteristics, and Medicaid status. This equation better predicts elevated blood lead level (EBLL) than one us...

We present the case of a 72-year-old male who underwent a permanent transvenous DDD pacemaker implantation for symptomatic complete heart block. The postoperative surface electrocardiogram (ECG) revealed a right bundle branch block (RBBB) pacing pattern with transition in lead V3 and left bundle branch block (LBBB) in D1, suggesting a malpositioned ventricular lead in the left heart. Malpositio...

[1] Analyses of radiogenic neodymium (Nd), strontium (Sr), and lead (Pb) isotope compositions of clay‐ sized detrital sediments allow detailed tracing of source areas of sediment supply and present and past transport of particles by water masses in the eastern Indian Ocean. Isotope signatures in surface sediments range from −21.5 ("Nd), 0.8299 (Sr/Sr), and 19.89 (Pb/Pb) off northwest Australia ...

Case report A 75-year-old man presented with recurrent persistent Staphylococcus bacteremia from spinal osteomyelitis. He had a past medical history significant for complete heart block for which a pacemaker with an Accufix ventricular lead (model number 330-258) was placed in 1990 and then an Accufix right atrial (RA) lead (model unavailable) in 1995. The bacteremia persisted despite intraveno...