Experimental study on the detection of cerebral hemorrhage in rabbits based on broadband antenna technology

Figures & data

Figure 1. Relative permittivity and conductivity of blood, brain white matter and brain grey matter: (a) relative permittivity; (b) conductivity.

Figure 2. Simulation model of cerebral hemorrhage.

Figure 3. Poynting vector in model of cerebral hemorrhage: (a) separate grey matter cylinder; (b) grey matter and blood cylinders.

Figure 4. Experimental system of rabbit cerebral hemorrhage.

Figure 5. Antenna structure.

Figure 6. Antenna prototype.

Figure 7. Antenna near field simulation pattern (1.86 GHz): (a) coordinate origin position, (b) 3D electric field pattern (r = 100 mm), (c) plane electric field pattern (r = 100 mm).

Figure 8. System working band.

Figure 9. Phase difference of S₂₁.

Table 1. Classification results of the bleeding states.

Number	Classification results of the bleeding 1ml	Classification results of the bleeding 2ml	Classification results of the bleeding 3ml
1	1	1	3
2	1	2	3
3	1	3	3
4	2	2	3
5	1	2	3
6	1	3	3
7	1	2	2
8	1	1	1
9	1	2	3
10	1	2	3
11	1	2	2
12	1	2	3
13	2	2	3