Plan of the lecture:

1. Diagnostic electromagnetic equipment. Physical principles electrographic methods in the diagnosis of diseases.

2. Plan of the lecture: • 1. The main characteristics of the electric field. • The electric field; • The potential of the electric field; • An electric dipole. Dipole field; • Dipole moment; • Equivalent circuit current dipole; • 2. ELECTROGRAPHY; • Einthoven theory. • PD classification methods based on field research • Methods and devices for diagnostic studies of cardiovascular system. • Methods and devices for diagnostic studies of the nervous and muscular system

3. Basic descriptions of electric-field The electric field arises up round any charged body, regardless of it moves or not. Power description of electric-field is a size of tension of electric-field, which equals the relation of force with which the field operates on a point charge, to the size of this charge:

4. Potential of electric-field Name the relation of potential energy of charge potential of electric-field in the field W to the size of this charge q

5. Electric dipole. Weeds dipole Name the system electric dipole from two even after a size and opposite after a sign point charges, located in the distance one from another. Description of dipol is a dipole moment – vector, even work of charge q on the sholder of dipole Where is a vector, directed from negative to the positive charge (shoulder of dipole).

6. Potential of electric-field of point charge Potential of electric-field of point charge is in the distance Where is a relative inductivity of environment, – the electric became.

7. law of Ohm for a complete circle In obedience to the law of Ohm for a complete circle

8. Power Line of the dipole and dipole moment of water.

9. Finding the potential difference between two points equidistant from the dipole.

10. Finding the potential of a dipole in a remote point in space

11. Dipole at the center of an equilateral triangle

12. The equivalent current dipole circuit

13. The theory of Einthoven Einthoven proposed to simulate the electrical activity of the heart dipoles with a dipole moment

14. The theory of Einthoven Einthoven, proportional to the projection of the electric vector in the appropriate direction

15. Einthoven space curve.

17. Amplifier

18. Electrocardiogram (EKG, ECG)

19. Electrocardiogram of a healthy person

20. The main blocks and Switches of modern electrocardiograph

21. The main blocks and Switches of modern electrocardiograph

22. Basic blocks and controls of modern electrocardiograph

23. The main blocks and Switches of modern electroencephalograph.

24. Block diagram of the digital electroencephalograph.

25. Block diagram of the electroencephalograph.

26. Block diagram of the electroencephalograph. 1. Head of a patient with diverter electrodes (top view); 2. input box; 3. Patch Cables; 4. selector unit with switches for each channel; 5. power amplification with regulators filters high and low frequency (F) and rough or smooth gain control (Y); 6. Unit registration.

27. Rubber hat for attaching electrodes to the head. A – bridge electrode, B – Needle, C – cup-shaped electrode: 1 – metal, 2 – sticky tape, 3 – electrode paste, 4 – skin. D – fixing the electrodes on the head by caps with rubber bands.

28. The main blocks and Switches of modern electromyogram

29. Scheme of connection blocks that make up the unit to record bioelectric potentials of muscles. It functions as follows: biopotential muscles strengthened by amplifier (1) through the switching device (2) and connection cable (3) goes to recording block and built-in controls (4) Output signals from the interface block and built-in control via connection cable coming in galvanometers oscilloscope (5).

30. Surface electrodes andneedle electrode Surface electrodes Needl electrodes