ABSTRACT
Combined with the clinical use condition of MR in use in Shanghai Sixth People's Hospital, MR components are divided into scanning type I and scanning type II. At the same time, combined with the main loss force of MR components, the research divides MR components into dynamic components and electric thermal components. In this study, a complete set of MR system reliability indexes and implementation methods are given, including system reliability index determination, system reliability allocation, component reliability index realization, system reliability prediction and system reliability verification. At the same time, this study also gives the methods of reliability prediction and reliability verification, and gives the MTBF calculation method of MR system based on clinical use data statistics.
Subject(s)
Humans , China , Magnetic Resonance Imaging , Magnetic Resonance Spectroscopy , Reproducibility of ResultsABSTRACT
Based on the clinical application data of medical X-ray computed tomography (CT) in the Shanghai Sixth People's Hospital, this study transformed it into the product reliability index requirements, and took the mechanical representative component-examination table (hereinafter referred to as "patient table") and the electronic representative component-DCB (data control board) as examples. Based on the relationship between failure characteristics and clinical application data, a complete set of closed-loop implementation methods from reliability index requirements to reliability design and verification are discussed.
Subject(s)
Humans , China , Reproducibility of Results , Tomography, X-Ray ComputedABSTRACT
In this study, through the analysis of the composition of domestic large radioactive medical equipment PET/CT and the characteristics of each subsystem, combing the vulnerable spots, according to the standard requirements of PET/CT for 10 years in its service life, we research the PET/CT service life's effectiveness. Firstly, this study introduces the concept of service life, the relationship between service life and risk analysis, the pivotal system composition of PET/CT, the importance of reliability of each component, the traditional test method to verify its reliability is researched. This study suggests a test procedure and method to prove the reliability of various components of PET/CT equipment during the service life. This method is described in detail, and the specific test process in practical engineering application is discussed, which proves that it is beneficial to ensure the effectiveness of PET/CT during the service life.
Subject(s)
Positron Emission Tomography Computed Tomography , Positron-Emission Tomography , Reproducibility of Results , Tomography, X-Ray ComputedABSTRACT
This study mainly discusses the contents, methods and characteristics of the collection of operation and maintenance data, as well as the establishment and evaluation methods of the distribution model of the failure time of medical electrical equipment. The distribution models of failure time at three levels of medical electrical equipment are established by linear regression method and goodness of fit test:The first is the device level MTBF distribution model, the second is the failure rate distribution model of the failure mode of key components, the third is the calculation model of the influence coefficient of influence factor on the failure mode of key components. This study presents a method of establishing MTBF segment model and implements a calculation model of influence coefficient varying with time.
Subject(s)
MaintenanceABSTRACT
Objective To investigate the clinical efficacy of PPH and vaginal repair to strengthen recto-cele in the treatment of ODS patients. Methods 87 patients with rectocele were divided into and groups A and B according to the principle of randomization. They were treated by vaginal repair and PPH repair respectively. The two groups were compared in term of curative effect and Longo′s ODS score,operation time,intraoperative blood loss,postoperative pain score,the number of analgesics needed,hospitalization time and hospitalization expenses. Results The heal rates together with marked efficacy rate at months 1 and 3 in group B were significantly higher than those of group A(87.5%,90% vs.77.5%,80%,P<0.05).There were no differences in hospital stay and in-traoperative blood loss.Group B was significantly superior to group A in postoperative pain score,number of analge-sics needed and hospitalization expenses.Conclusion PPH is more complete and more effective in treating consti-pation caused by RC.