We show that the metallike response of bulk semiconductors exhibits surface plasmon waves that lead to extraordinary transmission in the UV and soft x-ray ranges, in spite of the large absorption. The importance of realistic material response versus perfect conductors is also discussed. We show that the use
of perfect conductor boundary conditions can lead to field amplitudes that may be underestimated by several orders of magnitudes. These findings may be important in high resolution GSK1120212 clinical trial photolithography, near-field optical devices, and ultrahigh density optical storage in wavelength ranges, where it may not be possible to utilize more traditional plasmonic materials like noble metals. (C) 2010 American Institute of Physics. [doi:10.1063/1.3318460]“
“Purpose: To describe the imaging features during follow-up after radiofrequency (RF) ablation of fat-containing hepatocellular carcinoma (HCC).
Materials and Methods: Institutional QNZ chemical structure review board approval was obtained; informed consent was waived. A retrospective search in an electronic radiologic archive was performed for a 40-month period between February 2004 and May 2007 to identify patients who had undergone RF ablation of fat-containing HCCs. The presence of intratumoral
fat was determined at imaging (magnetic resonance or computed tomography) prior to the RF procedure; eight fat-containing HCCs, which had a mean size of 25 mm (range, 20-30 mm), were found. Images during follow-up were reviewed and compared with images prior to RF ablation to determine changes in fat content, complete or partial ablation, and local tumor progression. Tumor response was on the basis of assessment of lesion characteristics and enhancement for a follow-up of at least 6 months.
Results:
Persistent fat content was found at imaging in all ablation zones. Six patients were considered to have completely ablated tumors (mean follow-up, 16 months; range, 6-29 months), and two patients had local progression Selleckchem Ferroptosis inhibitor (mean follow-up, 18 months; range, 14-22 months). In the ablation zone of completely ablated tumors, the fat content progressively decreased (n = 4) or was unchanged during follow-up (n = 2). In the two tumors with local progression, the fat portion enlarged (n = 1) or did not change after ablation (n = 1).
Conclusion: Persistence of fat in the ablation zone during imaging follow-up after RF ablation of fat-containing HCCs does not necessarily indicate treatment failure. Changes in fat content of the ablation zone during follow-up (increase or decrease in size) could be used as additional criteria to determine success or failure of RF ablation in fat-containing HCC. (c) RSNA, 2009″
“In this study the use of the high resolution Micro-Single Photon Emission Tomography (HiSPECT) system with a radioactive bonemarker, Tc-99m-oxidronate, was evaluated in dogs with coronoid pathology and/or flexor enthesopathy.
Sixty-five elbows of 34 dogs were included.