Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: tissue damage

Sortuj według:

Ogranicz wyniki do:

Automated bimodal ultrasound device for preclinical testing of HIFU technique in treatment of solid tumors implanted into small animals

Kujawska T., Dera W., Dziekoński C.

Hydroacoustics

2017

Vol. 20

93--98

In Poland cancer is the second cause of death overall, and the first before 65. Demand for new anticancer therapies is increasing every year. The main objective of studies on medical and technical aspects of new anticancer methods is to reduce unwanted side effects and costs associated with conventional methods of treatment. Percutaneous (noninvasive) HIFU (High Intensity Focused Ultrasound) technique gives the chance to radically reduce both of these factors. The main goal of this work is automation of HIFU technology for producing thermal damage to the entire volume of a solid breast tumor implanted into a rat mammary gland using the proposed bi-modal ultrasound equipment, enabling the ultrasonic heating of a small volume within the tumor under the ultrasonic imaging control, as well as 3D scanning of the heating beam focus throughout the entire tumor volume. Design of the proposed equipment includes the heating probe of low frequency (about 1MHz), allowing penetration of pulsed focused waves into tissues, and the linear phased array probe of high frequency (from 4 MHz to 10 MHz), allowing visualization of the locally heated area inside the tumor in real time. Automatic 3D scanning of the heating beam focus provides the thermal damage to its entire volume.

Modelling of thermal damage in laser irradiated tissue

Jasiński M.

Journal of Applied Mathematics and Computational Mechanics

2015

Vol. 14, nr 4

67--78

In the paper the numerical analysis of thermal processes proceeding in the 2D homogeneous biological tissue subjected to laser irradiation is presented. In particular, the influence of necrotic changes in tissue on the values of the perfusion coefficient and effective scattering coefficient are discussed. The transient heat transfer is described by the bioheat transfer equation in the Pennes formulation. As a model of light distribution in tissue, the first-order scattering approach has been used. At the stage of numerical realization the 1st scheme of the boundary element method has been applied.

Badania biochemiczne w diagnostyce uszkodzeń narządowych

Solnica B.

Laboratorium - Przegląd Ogólnopolski

2003

nr 4-5

38--41

Choroba jest zwykle następstwem uszkodzenia tkanek, narządu lub układu narządów, którego przyczyną najczęściej jest niedokrwienie, uraz mechaniczny, zakażenie drobnoustrojami lub działanie czynników toksycznych. Za swoisty rodzaj uszkodzenia tkanek i narządów można też uznać rozrost nowotworowy. Uszkodzenie narządu powoduje zmiany w jego strukturze oraz wynikające z nich różnego stopnia upośledzenie czynności. Ustalenie rozpoznania choroby sprowadza się zatem do określenia miejsca, zakresu, stopnia i przyczyny uszkodzeń narządowych.