ABSTRACT
The real-time monitoring of cerebral hemorrhage can reduce its disability and fatality rates greatly. On the basis of magnetic induction phase shift, we in this study used filter and amplifier hardware module, NI-PXI data-acquisition system and LabVIEW software to set up an experiment system. We used Band-pass sample method and correlation phase demodulation algorithm in the system. In order to test and evaluate the performance of the system, we carried out saline simulation experiments of brain hemorrhage. We also carried out rabbit cerebral hemorrhage experiments. The results of both saline simulation and animal experiments suggested that our monitoring system had a high phase detection precision, and it needed only about 0.030 4s to finish a single phase shift measurement, and the change of phase shift was directly proportional to the volume of saline or blood. The experimental results were consistent with theory. As a result, this system has the ability of real-time monitoring the progression of cerebral hemorrhage precisely, with many distinguished features, such as low cost, high phase detection precision, high sensitivity of response so that it has showed a good application prospect.
Subject(s)
Animals , Rabbits , Algorithms , Cerebral Hemorrhage , Diagnosis , Computer Systems , Magnetics , SoftwareABSTRACT
In recent years,with the increasement of intracranial pressure detection accuracy,the use of intracranial pressure detection in clinic become more common.Various of technologies are used in clinic that can be divided into invasive methods,such as epidural catheter,subarachnoid bolt,intraventricular catheter,fiberoptic catheter and micro-sensors transducer,and non-invasive methods,such as evoked otoacoustic emissions,transocular method,transcranial doppler,imaging method and magnetic induction method.This paper reviews the physiological basis of intracranial pressure detection and common intracranial pressure detection techniques,especially on noninvasive intracranial pressure detection methods.Advantages and disadvantages of different intracranial pressure detection methods are listed,and an outlook of the development of non-invasive intracranial pressure detection technology are made.
ABSTRACT
Objective To probe the application value of radionuclide bone imaging in pre-treatment selection of therapeutic plan and regular post-treatment follow-up of patients with primary pulmonary cancer.Methods 810 patients with primary pulmonary cancer had radionuclide bone imaging respectively before the treatment. The follow-up radionuclide bone imaging was performed in 492 cases that were treated by surgery in 2 years after the operation. For 318 cases that were treated by non-surgery way,only 142 cases that had no skeletal metastases had follow-up radionuclide bone imaging in 2 years after the treatment. Results 179 cases (22.1%) had skeletal metastases in 810 cases. Multiple skeletal lesions were found in 157 cases and single skeletal lesion found in 22 cases. The majority sites of skeletal metastases were ribs, vertebrae column and pelvis. 57 cases that were treated by surgery had new skeletal lesions in 2 years after the operation. For non-surgery patients,79 cases had new skeletal lesions in 2 years after the treatment. Conclusion Radionuclide bone imaging is useful in the selection of therapeutic plan and staging of primary pulmonary cancer before the treatment.Regular bone imaging after the operation is helpful to detect early bone metastasis and choose the therapeutic plan, and should be regarded as a foremost method to detect the skeletal lesion. Radionuclide bone imaging after the non-surgery treatment maybe help us to conclude the prognosis of the patients.