Value of T6SS Core Gene in Respiratory Tract Infection.

Unlabelled: Hospital-acquired pneumonia caused by is a major healthcare burden. Type VI Secretion System (T6SS) contributes to both virulence and drug resistance in this bacteria. This study aims to investigate the diagnostic value of hemolysin co-regulated protein (Hcp) gene in pneumonia and further explore the effect of on clinical, pathogenicity and drug resistance.

[Research on algorithms based on Markov random models for diffusion tensor-magnetic resonance images].

With the utilization of diffusion tensor information of image voxels, a novel MRF (Markov Random Field) segmentation algorithm was proposed for diffusion tensor MRI (DT-MRI) images benefitted from the introduction of Frobenius norm. The comparison of the segmentation effects between the proposed algorithm and K-means segmentation algorithm for DT-MRI image was made, which showed that the new algorithm could segment the DT-MRI images more accurately than the K-means algorithm. Moreover, with the same segmentation algorithm of MRF, better outcomes were achieved in DT-MRI than in conventional MRI (T2WI) image.

[A preliminary study of beam weight optimization of intensity-modulated radiation therapy with genetic algorithm].

Unlabelled: To study the method for dose calculation and beam weight optimization of intensity-modulated radiation therapy (IMRT).

Methods: The IMRT dose calculation model based on two-dimensional convolution was constructed, the program of dose calculation and beam weight optimization with genetic algorithm was written with Visual c#.Net, and the optimization results were analyzed.

[A new method for static intensity-modulated radiation therapy].

Objective: To develop a new method for static intensity-modulated radiation therapy (IMRT) possible for implementation in smaller hospitals by incorporating accurate location equipments and treatment planning system in the available equipments for general radiotherapy.

Methods: Based on the techniques of conformal radiotherapy, a new split method for fabricating the three-dimensional physical compensator was developed to achieve IMRT.

Results: Experiment with the new method showed that the fabricated compensator could achieve good match between the high dosage shape in the target area and the dimensions of the tumor, and allowed adjustment of the dosage distribution according to the therapeutic requirement.

[Development of a new system for head and neck stereotactic conformal radiotherapy].

This paper introduces the constitution and fabrication of the new head and neck stereotactic conformal radiotherapy system. It remedies the shortages in the head and neck stereotactic conformal radiotherapy at present and it is deserved to be popularized in clinical applications.

[The automatic optimization arithmetic of selecting beam arcs in X-knife radiotherapy planning system].

In this paper, two new concepts of DR (Dose Repulsion) and DG (Dose Gravitation) are presented with their calculation formulas. For the problem of selecting beam arcs in x-knife radiotherapy Planning system, a mathematics model of constrained optimization has been built. Furthermore, we have produced a feasible project of automatic selecting optimized beam arcs plan using SA (Simulated Annealing) arithmetic based on the distribution of the fields of DR and DG in the reduced phase space.

[A study on the relation between the location of brain damage and agraphia of Chinese].

Objective: To investigate the relation between the location of brain damage and Chinese agraphia.

Methods: Aphasia Battery of Chinese (ABC) and Chinese Agraphia Battery (CAB) were used to examine the ability of oral language and writing. Different types of aphasia and agraphia were detected.