High beam quality and high peak power 1.6 µm deuterium Raman laser.

In this work, a 1.67 µm laser was generated in the pressurized deuterium pumped by a pulsed 1064 nm laser via the stimulated vibration + rotation Raman scattering (SV-RRS). By the optimization of the deuterium pressure, focal length, and polarization of the pump laser, a 66.

High efficiency stimulated rotational Raman scattering of hydrogen pumped by 1064 nm.

Laser-induced breakdown (LIB) and the competition of other Raman processes are major reasons restricting photon conversion efficiency (PCE) of Raman lasers. In this work, 1064 nm was used as the pump source, and stimulated rotational Raman scattering of hydrogen was investigated. The configuration of zooming out and focusing pump beam was applied, and the dimension of the pump beam at the focus spot increased significantly; consequently, LIB was suppressed, and Raman PCE was improved dramatically.

Different radiation treatment in esophageal carcinoma: a clinical comparative study.

Purpose: Conventional fractionation radiation therapy (CFRT), 3-dimensional conformal radiation therapy (3DCRT) and intensity modulated radiation therapy (IMRT), are always applied to treat esophageal carcinoma. The purpose of this study was to analyse the therapeutic results and acute radiation side effects of radiotherapy in the treatment of esophageal carcinoma.

Methods: From March 2008 to May 2010, 117 patients with esophageal carcinoma treated at our hospital were included into this study.

Quantitative study of lung perfusion SPECT scanning and pulmonary function testing for early radiation-induced lung injury in patients with locally advanced non-small cell lung cancer.

Radiation lung injury is a common side-effect of pulmonary radiotherapy. The aim of this study was to quantitatively assess early changes in lung perfusion single photon emission computed tomography (SPECT) scanning and pulmonary function testing (PFT) prior to and after intensity modulated radiotherapy (IMRT) for patients suffering from locally advanced non-small cell lung cancer (LANSCLC). Twenty patients with LANSCLC received lung perfusion SPECT scanning and PFT prior to IMRT and immediately after IMRT.