Evaluation of the influence of large temperature variations on the grey level content of B-mode images

Alvarenga, A. V.; Teixeira, César; Ruano, M. Graça; Pereira, Wagner

http://hdl.handle.net/10400.1/2378

Use this identifier to reference this record.

Name:	Description:	Size:	Format:
6_Int_Congress_Ultrasonics_Chile_Alv_2009.pdf		472.46 KB	Adobe PDF	Download

Send Feedback

Authors

Abstract(s)

In this work, the variation of the grey-level content of B-Mode images is assessed, when the medium is subjected to large temperature variations. The goal is to understand how the features obtained from the grey-level pattern can be used to improve the actual state-of-the-art methods for non-invasive temperature estimation (NITE). Herein, B-Mode images were collected from a tissue mimic phantom heated in a water bath. Entropy was extracted from image Grey-Level Co-occurrence Matrix, and then assessed for non-invasive temperature estimation. During the heating period, the average temperature varies from 27oC to 44oC, and entropy values were capable of identifying variations of 2.0oC. Besides, it was possible to quantify variations in the range from normal human body temperature (37oC) to critical values, as 41oC. Results are promising and encourage us to study the uncertainty associated to the experiment trying to improve the parameter sensibility.

Keywords

Non-invasive temperature estimation Grey-level content Iimage processing techniques Ultrasound

URI

http://hdl.handle.net/10400.1/2378

Citation

Alvarenga, André V.; Teixeira, César A.; Ruano, Maria Graça; Pereira, Wagner C. A. Evaluation of the influence of large temperature variations on the grey level content of B-mode images, Physics Procedia, 3, 1, 415-419, 2010.