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6 Acta Physica Polonica A

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Methods of Information Extraction from OCT Images

100%

Zajac A. , Urbański Ł. , Kasprzak J. , Kecik D.

Acta Physica Polonica A

2011

tom 120

nr 4

772-775

Optical diagnostic methods of biological media are more and more willingly used in clinical practice - also instead of classical biopsy. Particularly, optical coherent tomography methods and mammography (permitting achieving three-dimensional imaging of a tissue) are attractive in comparison with classical diagnostic methods. The article presents the analysis methods of optical parameters of biological tissues developed allowing obtaining absolute values of these parameters. Thanks to modern image analysis methods - wavelet transforms - the optical diagnostic effectiveness was improved. The theoretical and practical results achieved were compared with results of commercially accessible methods implemented in OCT devices.

Optical Diagnostic in Medicine - Needs and Possibilities

100%

Kasprzak J. , Samsel D. , Borkowska A. , Kecik M.

Acta Physica Polonica A

2011

tom 120

nr 4

678-685

Methods of optical imaging used in medical diagnostic (with taking the newest diagnostic techniques into consideration in particular) have been presented. Selected optical characteristics of tissues having an influence on the range of the classical methods of the optical imaging have been discussed in detail. The respond to the classical method limitations was to use scanning methods and detection techniques consisting in three-dimensional imaging of tissue structures in real time. A specific eye structure allows the wide using of these techniques in ophthalmology. Such advantages like non-invasiveness, non-contactness and high resolution (guaranteeing the safety of a patient) show a huge success of these techniques. The results of the research (conducted in many research centers) point at the wider application possibility of optical scanning method in medical diagnostic.

Perception of the Laser Radiation for the Near Infrared Range

100%

Kecik D. , Kasprzak J. , Zając A.

Acta Physica Polonica A

2011

tom 120

nr 4

686-687

During the diagnostic research done by means of optical devices equipped with radiation sources from the near infrared range the phenomena indicating the perception possibility of this range by a human eye were observed. In this contribution the initial results of the research of this phenomenon were presented. Sources of radiation applied in laser polarimeters (785 nm) and devices designed for optical coherent tomography (820, 850 nm) were taken into particular consideration. Perception tests with the use of a laser diode generating at the wavelength of 940 nm were also carried out. It was stated that the radiation from the range examined can be recorded by a human eye giving a colour sensation - in practice independently of the wavelength of the radiation beam falling into a retina.

Measurement Possibility Analysis of the Real Values of the Tissue Structure Parameters with the Use of Optical Coherent Tomography Method

100%

Kasprzak J. , Kęcik D. , Zajac A.

Acta Physica Polonica A

2011

tom 120

nr 4

662-665

The issues connected with the usefulness of the method of averaging A-scans applied in measurements of real optical parameters with the use of commercial optical coherent tomography systems have been discussed. The basic method description and examples of applications have been given. Examples of the characteristics of metrological devices used in medical practice as well as the possibility of the method applied to the turbidity assessment have been presented.

Use of White Light Interference Methods in the Opaque Mediums Diagnostic

100%

Kasprzak J. , Borkowska A. , Kecik M.

Acta Physica Polonica A

2011

tom 120

nr 4

657-661

The reflection, absorption and scattering influence on turbid structure has been discussed. The influence of transverse scanning method on geometrical deformations as well as issues of thickness absolute measurements and refractive index evaluation methods has been analyzed. A number of phenomena which may be the artefact source and the cause of tomogram incorrect interpretation have been pointed out.

Influence of Intersubband Scattering on the Magnetic Field Dependence of the Conductivity Tensor

100%

Siwiec-Matuszyk J. , Baj M. , Babiński A. , Kasprzak J.

Acta Physica Polonica A

2006

tom 110

nr 3

337-344

In this paper we show that intersubband scattering can lead to apparent inconsistency of the experimental results obtained by means of classical and quantum transport measurements and this discrepancy is entirely connected with the usage of classical formulae to describe magnetic field dependence of a conductivity tensor. We prove that there is no contradiction in our observations and that the models describing quantum oscillations and magnetic-field dependence of the conductivity tensor, which are present in the literature, complement each other.