ABSTRACT
Objective:We propose a quality control plan which is suitable for the actual situation of our hospital and keep our CT equipment in a normal working condition, so that we can get the best image quality.Methods: According to “GB 17589-2011 Specification for quality assurance testing of X-ray computed tomography apparatus”, we can get quality testing data of GE Lightspeed VCT from different time.Results: The indicators in quarterly testing meet the requirements, and have little difference with ideal value. Meanwhile the testing indicators have no significant change after calibration. The indicators in half year testing meet the requirements, and have large difference with ideal value. Meanwhile the testing indicators have significant change after calibration. Conclusion: According to the test results, combined with the daily use of experience, we carry out the quality control program for the actual situation of our hospital. It reduces the failure rate of the equipment, and improves the picture quality of CT equipment.
ABSTRACT
Objective: To study the quality testing method for the seeds of Silybum marianum, so as to provide the basis for the development of testing procedures and quality grading standard for the seeds of S. marianum. Methods: Refering to "The International Seed Testing Rules" and "China Crop Seed Testing Rules" to carry out the quality testing for the seeds of S. marianum. Results: The seed cleanliness was analyzed by winnowing method; The authenticity was identified by morphological appearance compared with 1000 grain weight by 1000 grain weight determination method; The germination conditions for seed germination were washed with running tap water before 2 h, the double filter paper was used as germination bed, and the seeds were incubated at 20 ℃, 8000 lx light, counting time for 4-14 d; The viability was determined by electrical conductivity method. Conclusion: The method is simple and reliable to the quality testing for the seeds of S. marianum.