Research On Critical Problems Of Imaging Detection Of Intracranial Haemorrhage

The existence of intracranial haemorrhage(ICH)does great harm to patient with high mortality and disability rate.Nowadays,the application of near-field microwave imaging technology for the detection of intracranial blood clots is a hot problem in the field of bioelectromagnetics research,which is of important value for medical detection.At present,on one hand,how to design efficient and all-round detection source for intracranial detection has attracted tremendous attention.On the other hand,how to improve the imaging resolution and contrast is faced with large challenges.In view of the problems above,this paper designs a new type of electromagnetic dipole antenna as the microwave emission source constituting the detection system with the receiving antenna array.Based on the equivalent spherical layered head model,the feasibility of two-dimensional and three-dimensional imaging is realized.And this paper analyzes the detection performance of the digital source of Laguerre-Gaussian beam.In order to improve the imaging quality,the supposition of different modes for vortex wave is proposed to optimize the performance.On the basis of the existing classical confocal imaging algorithm,the focus factor is firstly put forward.Otherwise,this paper explored the effect of the focus factor on the imaging mechanism and obtained the best value of focus factor,through the analysis of vortex wave source and new EM-dipole source on the equivalent spherical layered head model.Based on complex anatomical human head model,the 2D and 3D imaging positioning is achieved by new type of EM-dipole antenna for intracranial blood clots.Meanwhile,the matching medium is introduced to optimize the imaging performance.The best focus factor optimized from the equivalent spherical layered head model is demonstrated to make the detection performance improved significantly in the complex anatomical human head model.