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Chinese Journal of Medical Instrumentation ; (6): 115-118, 2023.
Article in Chinese | WPRIM | ID: wpr-971315


OBJECTIVE@#To analyze the malfunction and maintenance process of Carestream digital X-ray machine DRX-NOVA for reference.@*METHODS@#The fault of Carestream digital X-ray machine DRX-NOVA in 2011-2021 was summarized, the fault types were classified, and the maintenance process was summarized.@*RESULTS@#Fault types can be divided into three categories, each of which has its own characteristics and specific solutions.@*CONCLUSIONS@#It is necessary to master the principle of equipment to repair all kinds of equipment failures. Repair the machine should be careful, comprehensive consideration of the cause of the failure. To correctly understand and analyze the operation of the machine under normal conditions, we can accurately analyze the cause of failure, so that we can really solve the problem.

X-Rays , Radiography , Radiographic Image Enhancement , Equipment Failure
Chinese Journal of Orthopaedic Trauma ; (12): 901-907, 2020.
Article in Chinese | WPRIM | ID: wpr-867954


Objective:To study the performance of the elastic fixation with our self-designed Tightrope system for inferior tibiofibular syndesmosis (ITFS) diastasis.Methods:In this self-control study, 6 specimens of normal cadaveric ankle were used as a normal ITFS group while the models of the ITFS diastasis were constructed as a group of ITFS diastasis. On the models of ITFS diastasis, elastic fixation with transverse Tightrope system (transverse fixation group) or binding Tightrope system (binding fixation group) was applied. The reduction and stability of ITFS were compared between transverse fixation and binding fixation for ITFS diastasis in terms of ITFS parameters on X-Ray[tibiofibular clear space (TFCS) and medial clear space (MCS)] and on CT[inferior tibiofibular anterior clear space (ITFACS), inferior tibiofibular middle clear space (ITFMCS), inferior tibiofibular posterior clear space (ITFPCS), anterior inferior tibiofibular interval (AITFI) and fibular rotation (θfib)].Results:The transverse fixation with Tightrope system for ITFS diastasis on the models led to iatrogenic injury to the fibular and the ITFS interosseous ligaments and to the perforating peroneal artery, and malreduction as well while the binding fixation with Tightrope system caused no injury to the anterior or the posterior ITFS ligament or the superior peroneal retinaculum but fine reduction as well. In comparisons of TFCS, ankle MCS, ITFACS, ITFMCS and AITFI between the 4 groups, normal ITFS group<binding fixation group<transverse fixation group<ITFS diastasis group; in comparison of ITFPCS between the 4 groups, transverse fixation group<binding fixation group<normal ITFS group< ITFS diastasis group; in comparison of θfib between the 4 groups, normal ITFS group<binding fixation group< ITFS diastasis group< transverse fixation group. Significant differences were shown in all the pairwise comparisons ( P<0.05). Conclusion:The binding fixation with our self-designed Tightrope system may be superior to the transverse fixation in surgical approach and reduction and stability of ITFS.

Chinese Journal of Medical Instrumentation ; (6): 467-470, 2020.
Article in Chinese | WPRIM | ID: wpr-942764


This paper is a summary of the three types of faults that have occurred in the recent years in the Carestream DR7500:hardware failure, software failure, and communication failure. The specific cases of three types of faults are introduced in a case-by-case basis.

Equipment Failure , Maintenance , Radiographic Image Enhancement
Journal of Practical Radiology ; (12): 839-842, 2018.
Article in Chinese | WPRIM | ID: wpr-696917


Objective To discuss the hemodynamic features of internal carotid aneurysm,and study the relationship between hemodynamics and occurrence,development and rupture of internal carotid aneurysm .Methods The 3D model of internal carotid aneurysm was established by materialise's interactive medical image control system(MIMICS).The finite element analysis software ANSYS was used to carry out numerical simulation.Results Low wall shear stress of internal carotid aneurysms were located at the same area.The wall shear stress at different region were positive correlation with the blood flow velocity.Conclusion The blood flow velocity and wall shear stress at the top of aneurysm are relatively low.This position is consistent with the rupture position.The significant changes of hemodynamic at the top of aneurysm may trigger a series of mechanical biological effects on the internal carotid aneurysm wall.The changes alters cells'gene and protein's expression,causes rupture of the aneurysm.

Chinese Journal of Medical Instrumentation ; (6): 463-466, 2015.
Article in Chinese | WPRIM | ID: wpr-265588


This paper is maintenance of four kinds of failures of Carestream GC1.5 the workstation used several years to summarize, workstation software, change the host, burn, workstations transmission, and four kinds of failures of the specific case of itemized elimination steps are introduced.

Computers , Reference Standards , Maintenance , Software