A non-invasive diffuse reflectance calibration-free method for absolute determination of exogenous biochemicals concentration in biological tissues

2014 ◽  
Author(s):  
Alexander V. Lappa ◽  
Artem N. Kulikovskiy ◽  
Oleg G. Busarov
Keyword(s):  
Diffuse Reflectance ◽  
Biological Tissues ◽  
Absolute Determination ◽  
Non Invasive ◽  
Calibration Free

Determination of photosensitizer concentration in biological tissues from diffuse reflectance and fluorescence

2009 ◽  
Vol 76 (2) ◽  
pp. 260-267 ◽  
Author(s):  
M. M. Korol’ ◽  
A. S. Slesar’ ◽  
M. V. Parkhots ◽  
A. Ya. Khairullina ◽  
T. V. Ol’shanskaya
Keyword(s):  
Diffuse Reflectance ◽  
Biological Tissues

scholarly journals Correcting the infrared images of soft biological tissues

2019 ◽  
Vol 55 (1) ◽  
pp. 110-117
Author(s):  
A. P. Ivanov
Keyword(s):  
Soft Tissues ◽  
Thermal Power ◽  
Spherical Shape ◽  
Biological Tissues ◽  
Thermal Source ◽  
Near Surface ◽  
Non Invasive ◽  
Calculation Results ◽  
Heat Transfer Parameter

Non-invasive (remote) thermographic methods based on IR images are being actively implemented. Using the calculation results of the temperature increment that occurs when a pathological source exists in the person’s skin, a number of ways of solving “inverse problems” are proposed. These include the determination of the depth of the thermal source by measuring the mono or polychrome increment of the normalized brightness of the tissue surface at one point; the source depth and heat transfer parameter by measuring the poly or monochrome one of the normalized brightness (or temperature) at two points; the thermal power of the source by measuring the increment of absolute brightness or temperature at one point; the depth of the thermal source and its size in the near-surface layer by measuring the increment of the normalized brightness at two points. In order to solve these problems, the thermophysical and optical properties of the soft tissues of the biological organism are indicated. Analytical solutions are given for describing the temperature and the glow that arises under its influence from the sources of cylindrical and spherical shape.

scholarly journals Non-invasive depth determination of inclusion in biological tissues using spatially offset Raman spectroscopy with external calibration

The Analyst ◽  
2020 ◽  
Vol 145 (23) ◽  
pp. 7623-7629 ◽  
Author(s):  
Sara Mosca ◽  
Priyanka Dey ◽  
Marzieh Salimi ◽  
Francesca Palombo ◽  
Nick Stone ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Biological Tissues ◽  
Disease Diagnosis ◽  
Early Disease ◽  
External Calibration ◽  
Non Invasive ◽  
Depth Determination

Spatially Offset Raman Spectroscopy (SORS) allows chemical characterisation of biological tissues at depths enabling in vivo localization of biomarkers for early disease diagnosis.

scholarly journals DETERMINATION OF THE OPTIMAL SCANNING STEP FOR EVALUATION OF IMAGE RECONSTRUCTION QUALITY IN MAGNETOACOUSTIC TOMOGRAPHY WITH MAGNETIC INDUCTION

2019 ◽  
Vol 9 (4) ◽  
pp. 38-42
Author(s):  
Adam Ryszard Żywica ◽  
Marcin Ziółkowski
Keyword(s):  
Image Reconstruction ◽  
Magnetic Induction ◽  
Imaging Modality ◽  
Biological Tissues ◽  
Non Invasive ◽  
Scanning Step ◽  
Reconstruction Quality ◽  
Complex Shapes

Magnetoacoustic Tomography with Magnetic Induction (MAT-MI) is a new hybrid imaging modality especially dedicated for non-invasive electrical conductivity imaging of low-conductivity objects such as e.g. biological tissues. The purpose of the present paper is to determine the optimal scanning step assuring the best quality of image reconstruction. In order to resolve this problem a special image reconstruction quality indicator based on binarization has been applied. Taking into account different numbers of measuring points and various image processing algorithms, the conditions allowing successful image reconstruction have been provided in the paper. Finally, the image reconstruction examples for objects’ complex shapes have been analyzed.

INFLUENCE OF OFFICE BLEACHING SYSTEMS ON THE RESISTANCE OF HARD TOOTH TISSUES

2020 ◽  
pp. 119-125
Author(s):  
Magsumova O.A. ◽  
Postnikov M.A. ◽  
Ryskina E.A. ◽  
Tkach T.M. ◽  
Polkanova V.A.
Keyword(s):  
Informed Consent ◽  
Oral Fluid ◽  
Personal Data ◽  
Acid Resistance ◽  
Non Invasive ◽  
Hard Tissues ◽  
Voluntary Informed Consent

One of the non-invasive methods for treating discoloration of hard tooth tissues is teeth whitening. The aim of this work is to assess the dynamics of changes in the acid resistance of enamel and hard tissues of teeth and the rate of its remineralization after the procedure of office teeth whitening. The study involved 123 patients aged 18 to 35 years with discoloration of various origins, with the color of hard tooth tissues on the Vita Classic A2 scale and darker. Before performing the office, teeth whitening procedure, all patients gave their written voluntary informed consent to participate in this study, as well as consent to the processing of personal data. Depending on the chosen method of office teeth whitening, patients were divided into 3 groups. The resistance of hard tooth tissues was judged based on the determination of TOER and CASRE tests. These indicators were determined at various times (5 days before the office teeth whitening procedure, 5 days after it, after 14, 30 days and 6 months). Regardless of the chosen whitening system, the office teeth whitening procedure is accompanied by a decrease in the enamel's resistance to acids and a decrease in the rate of its remineralization. The remineralizing function of oral fluid promotes the positive dynamics of the studied parameters after 14 days and after 30 days values increased due to the appointment of remineralizing therapy to all patients in 2 weeks after the teeth whitening procedure. After 6 months, all patients had high enamel resistance and the rate of its remineralization.

Sign in / Sign up

Export Citation Format

Share Document