[Changes in the rate of surface blood microcirculation studied by photon-correlation spectroscopy in the practical treatment and diagnosis of diabetes mellitus].

The paper is concerned with the results of studies on the basal blood flow and responses of the microcirculatory channel to physiological and pharmacological loads in health and diabetes mellitus using the method of photon-correlation spectroscopy in the light fiber variant. The rate of the basal blood flow in patients with diabetes mellitus (irrespective of the diabetes type) as compared to that in health was significantly lower in the finger tip and tended toward reduction in the inner side of the forearm, lobule of the auricle and in the conjunctiva. The presence of retinopathies in patients with diabetes mellitus resulted in a significant decrease in the rate of the blood flow in the conjunctiva as compared to those in health and diabetes mellitus without retinopathy.

[Use of coherent optical spatial filtration for improving the quality of x-ray images].

The article deals with the problem of using the method of optical spatial filtration, applied at present in radiodiagnosis for solving a number of problems connected with image processing in order to reduce the influence of disturbances, to compensate the transfer functions, etc. The process of the formation of roentgen shadow projection is described by integral equations. In this way the possibility for correcting a posteriori the transfer characteristics of the processes of the formation and fixation of roentgenograms has been revealed, and the maximum dimensions of objects capable of being successfully processed by spatial filtration, as well as the necessary filtering functions of the correction filter, have been determined.