Radiation field photography is a kind of technique done by the exposure of the film due to electric discharge of the body surface under the state of electric field of high voltage. This technique can be applied to any research of the human diseases, meridians, physiological conditions and other extra human functions.

In doing the radiation field photography, the physiological indexes, such as those of the thickness of skin, the cornfication of skin, temperature of the body surface secretion and electrolyte concentration of sweat, blood micro circulation, local affection, etc. influence to some extent the intensity of the radiation field electricity. In theory, the difference of the result of the photography is directly caused by the amount of the static current on the body surface, the organic resistance, quality of the film and the air humidity.

If pictures of the radiation field are taken for the same person and at the same period, the factors of variation are greatly reduced. A comparative study of the body surface temperature between 10°C-45°C have been conducted to see if the body surface temperature and the electrolyte concentration of the body surface markedly affect the radiation field.

Another comparative study of the body during infiltration in 10% NaCl solution and normal water has been done too, and there was no marked difference found.

Experiment methods.
The pictures were taken with a self-made radiation field instrument, the voltage of the electric field was 15000-20000 volts. The duration of discharge was about 50 mx.

Pictures of the qigong practitioners were taken before, during and after the exercise under the same room temperature and humidity. The palms of the practitioners directly put on the films. The duration of discharge and voltage did not change in the process and the films were immediately developed after pictures taken.

An assessment of the radiation condition was done according to the changes of length of the radiative ray, radiation thickness, shadow of the radiation halo, radiation points and the intensity of the radiation spots. Pseudo-colour treatment was conducted to further assess the intensity of the radiation. The exposure degree was divided into 9 grades. Thus, the exposure degree could be seen in accordance with the colour and area difference.

Pictures of 49 practitioners of various qigong patterns were taken, among them 46 were males and 3 females at the age of 24-70. The qigong patterns included Wudang Qigong, Inner-Cultivation Qigong, Shaolin Qigong, Huanglong Tangzhang Qigong, Buddha' s Warrior Attendant Qigong, etc.

Results and Discussion:
Qualitative Fade of the radiation field negatives was decided according to the following criteria.
1. Obvious changes of the length of the radiative rays, changes of thickness and concentration of the shadow of the radiation halo, increase of intensity of the radiation spots, known as marked increase.
2. Slight changes of the length of the radiative rays, some changes of the thickness and concentration of the shadow of the radiation halo, slight increase of the radiation spots, unobstructive increase of the intensity of the radiation spots; known as slight increase.
3. No changes of the S indexes.
4. Shortening of the length of the radiative rays, slight decrease of the thickness and intensity of the radiation halo, reduction of the radiation spots, decrease of the intensity of the radiation spots, known as slight decrease.
5. Marked decrease of the 5 indexes. Results of the 45 subjects
Index No Persons
1 5
2 12
3 17
4 9
5 0
6 6

Failure of identification.
From the above it is significant to assess by the radiation field photography of the qigong practitioners (P>0.1) . The results could vary for different practitioners who did the same qigong exercise. It tells that the variation of qigong is not the main cause of the changing results, however, the practices' s exercise quality is the decisive factor. After the exercise, the increase and decrease of the intensity of discharge of the radiation field may be related to the patterns of qigong the master practitioner. and to the fact that the master is in a stress state.

After the 49 subjects' negatives were treated by the pseudo-colours process, the following results were obtained based on the 5 criteria of the radiative energy.
Index No. Persons
1 5
2 23
3 9
4 11
5 1

From the above we can see that all the identifications may be got after the negatives have been treated by the pseudo-colour process, and it has been proved that practice of qigong markedly influences the result of the radiation field photography (P<0.001). The pseudo colour process is effective to the radiation field photography.

The radiation field photography can be applied to medical and clinical research and in the study of qigong, it can tell us that the process of the qigong exercise affects to some extent the radiative intensity. A further study of the mechanism of the influenced radiative intensity and the mechanism of qigong is a subject of interest.

Pseudo-color treatment of the radiation field photography of qigong masters