Unique haemodynamics in the patient with residual native aortic regurgitation who underwent apicoaortic bypass.
Department of Cardiovascular Surgery, NTT Medical Center Tokyo, 5-9-22 Higashigotanda, Shinagawa-ku, Tokyo 141-8625, Japan.European Heart Journal (Impact Factor: 14.1). 12/2010; 31(23):2959. DOI:10.1093/eurheartj/ehq275
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ABSTRACT: Displacement damage (or bulk damage) induced by high dose (>200 Mrad) γ-radiation in high resistivity (6-10 kΩ-cm) silicon detectors has been studied. It has been found that detector bulk leakage current increases with γ dose at a rate of 3.3×10<sup>-7 </sup> A/cm<sup>3</sup>/Mrad. This damage rate of bulk leakage current originates from the introduction of generation centers and at a dose of 210 Mrad of γ-radiation is comparable to that induced by 1×10<sup>12</sup> n/cm<sup>2</sup> of neutron radiation. Nearly 100% donor removal and/or compensation was found in detectors irradiated to 215 Mrad. Space charge sign inversion (SCSI) was observed in detectors irradiated to ⩾215 Mrad using the transient current technique (TCT). As many as six deep levels have been observed by current deep level transient spectroscopy (I-DLTS). There was insignificant annealing and no reverse annealing even after elevated temperature treatment for detectors irradiated to 215 Mrad. A small amount of reverse annealing (10 to 15%) has been observed during the room temperature storage period of about 11 months for detectors irradiated to 500 MradIEEE Transactions on Nuclear Science 07/1997; · 1.22 Impact Factor