[Research on the Background Subtraction Method for X-Ray Fluorescence Spectrum with X-Ray Tube Excitation].

X-ray tube is the most commonly used equipment in X-ray fluorescence spectrum analysis as excitation source whose primary spectrum has become a major source of the background of X-ray fluorescence spectrum. Background subtraction should go before further analysis of this spectrum. The accuracy of the estimation of the background directly affect the results of subsequent processing steps.

[Discussion of the Application and Influence Factors of Low-Background Gamma Spectrometry in Distinguishing Sedimentary Rock Types].

The contents of radionuclides uranium, thorium and potassium in the sedimentary rocks mainly depend on the contents of clay in the rocks. And the content of clay is the main basis for distinguishing types of sedimentary rock. Therefore, the value of specific activity or content of uranium, thorium and potassium can be as the quantitative index to distinguish sedimentary rock type.

A retrospective study of induction chemotherapy with docetaxel, cisplatinum, and 5-fluorouracil followed by concurrent radiotherapy with cetuximab in locally advanced head and neck cancer.

Background: The objective was to study the results of induction chemotherapy followed by external beam radiation therapy with concurrent cetuximab in the treatment of locally advanced head and neck cancer.

Methods: Seventeen patients with stage III or IV squamous cell carcinomas of the head and neck who received docetaxel, cisplatinum, and 5-fluorouracil followed by radiation therapy with concurrent cetuximab were retrospectively analyzed. All radiation was delivered with image-guided intensity-modulated radiation treatments.