Treatment outcome of radiotherapy alone versus radiochemotherapy in early stage nasal natural killer/T-cell lymphoma.

This study aims to investigate the prognostic factors and long-term treatment outcome in patients with early stage nasal natural killer (NK)/T-cell lymphoma. Sixty-four patients were recruited in this study, whose clinical and laboratory data were collected from hospital records. Early stage (stage IE: 51, stage IIE: 13) nasal NK/T-cell lymphoma (NNTCL) was established according to Ann Arbor staging classification.

Patient positioning error measurement based on dynamic template matching techniques.

The decrease of accuracy in patients' repeated positioning in radiotherapy due to body's transformation is considered and a positioning error measurement method using dynamic template matching technique is brought forward in this paper. This method is an improvement of the matching method to correct positioning error based on the CT digitally reconstructed radiograph(DRR), which uses the video reconstructed 3D surface model that can reflect the body's transformation as the matching template instead of DRR. This method can not only improve the positioning accuracy but also eliminate the adverse influence brought by body's transformation.

Effect of CT Image-Based Voxel Size On Monte Carlo Dose Calculation.

Currently, the conventional empirical or semi-empirical dose calculation algorithms for radiation treatment planning system have been selected as dose engines. The accuracy of these dose calculation algorithms is limited. The main problem is that they fail to adequately consider the lateral transport of radiation or loss of electronic equilibrium near interface between two heterogeneous mediums.

[Effect of natural killer cell line NK-92 against human ovarian carcinoma cells in vitro and in vivo].

Objective: To study the cytotoxic activity of NK-92 cells irradiated against human ovarian cancer.

Methods: NK-92 cells were exposed to different doses of radiation and assayed for proliferation by a standard (3)H-thymidine incorporation assay and cell count by using trypan blue exclusion. The cytotoxic activity of NK-92 cells against targets was measured in a standard (51)Cr-release assay in vitro.