FIELD: medicine.
SUBSTANCE: method consists in the sequential laser pulse lighting of a surface of an test object through two identical adjacent light guides, the collection of laser light from the test content by two light guides opposed to coupled emitting light guides, the recording of light by four photodetectors two of which are arranged on optical axes of the receiving light guides, and another two - equispaced from the optical axes of the light guides with the distances between output faces of the receiving light guides and a receiving surfaces of the photodetectors being the same, and heterogeneity in the test object is determined by heterogeneity determination function D(x) which is of the form 
where P'(1) and P(1) are signals of the photodetectors of the receiving light guides located on the optical axes, P'(2) and P(2) are signals of the photodetectors of the receiving light guides spaced from the optical axis, and x is a linearly variable magnitude. An apparatus comprises along the radiation flow a laser diode, an emitting light guide, a receiving light guide and a photodetector connected through a signal detector with a computer. The transmitting and receiving light guides are designed to be mechanically scanned synchronously. In addition, along the radiation flow, there are connected a second laser, a second emitting light guide adjoining the first emitting light guide, a second receiving light guide close to the first receiving light guide, and a second photodetector, and another two photodetectors are equispaced from the optical axes of the receiving light guides. The photodetectors are equispaced from the output faces of the receiving light guides and connected with coupled four signal detectors connected to the computer.
EFFECT: use of the inventions allows improving accuracy of two-dimensional image formation of internal heterogeneities of the test object.
2 cl, 6 dwg
