Processing method for inheriting monitoring image information after continuous monitoring interruption in brain dynamic electrical impedance imaging
A dynamic resistance and processing method technology, which is applied in image data processing, electrical digital data processing, medical image data management, etc. Condition observation and diagnosis, to improve clinical practicability, restore monitoring goals, and suppress image artifacts
Active Publication Date: 2017-03-22
FOURTH MILITARY MEDICAL UNIVERSITY
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If the data at the restart of monitoring is selected as the reference frame, although the influence caused by the electrode-scalp contact state and electrode position change can be eliminated, the image information before the restart of monitoring cannot be directly reflected on the new monitoring image, resulting in the previous impedance Lost change information
The interruption of continuous monitoring seriously affects the observation and diagnosis of the disease, which is not conducive to the clinical promotion and application of dynamic brain electrical impedance imaging
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[0044] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0045] A processing method for inheriting monitoring image information after continuous monitoring of craniocerebral dynamic electrical impedance imaging is interrupted according to the present invention, comprising the following steps:
[0046] (1) Obtain the baseline correction value of the measurement data. Select the last n frames of data before continuous monitoring is interrupted and the first n frames of data before restarting monitoring, and connect the data together as data x(l), for the ith (i∈N, N is the total number of measurement channels) valid data channel data x i (l) Fitting with spline function:
[0047]
[0048] Where S(x) is the data sequence x i The spline fitting function of (l), S(x) minimizes the value of L. where p∈[0,1] reflects the closeness of the fitting fu...
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The invention discloses a processing method for inheriting monitoring image information after continuous monitoring interruption in brain dynamic electrical impedance imaging, and the method is used for recovering the monitoring image information lost after the clinical continuous monitoring interruption in the brain dynamic electrical impedance imaging. According to the method, measurement data before and after the continuous monitoring interruption is analyzed; first, the measurement data is processed by using a spline difference fitting method, and image artifacts caused by baseline change of the measurement data due to inconsistent electrode contact states before and after the continuous monitoring interruption are inhibited; and then, an image reconstruction matrix is subjected to augmentation processing, and prior information of electrode displacement is introduced in the reconstruction matrix, so that the influence on the monitoring image due to inconsistent electrode arrangement positions before and after the monitoring interruption is reduced. Through a test, the method can effectively inhibit the image artifacts caused by changes of electrode contact states and arrangement positions before and after the monitoring interruption and recover a normal monitoring target, so that the clinical practicality of electrical impedance imaging monitoring is improved.
Description
technical field [0001] The invention belongs to the technical field of dynamic electrical impedance imaging, and in particular relates to a processing method for inheriting monitoring image information after the continuous monitoring of cranial dynamic electrical impedance imaging is interrupted. Background technique [0002] Brain dynamic electrical impedance tomography technology uses electrodes evenly distributed around the head to continuously apply safe current excitation to the brain in real time and measure the boundary voltage, using data at two different times and taking the data at the earlier time as a reference frame, and the data at another moment is the foreground frame. After the difference between the two frames of data, combined with a certain imaging method, the impedance changes inside the brain at these two different moments are reconstructed. Therefore, continuous and stable data acquisition is the primary condition for the system to perform normal dynam...
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Login to View More IPC IPC(8): G06F19/00G06T5/00
CPCG06T2207/10072G06T2207/30016G06T5/80
Inventor 付峰张戈代萌李蔚琛杨琳徐灿华董秀珍史学涛
Owner FOURTH MILITARY MEDICAL UNIVERSITY