Temperature Mapping Using Ultrasound Digital Images

Nurouzi, A. and Abolhasani, M. J. and Takavar, A. and Oghabian, M. A. and Ghanaati, H. (2005) Temperature Mapping Using Ultrasound Digital Images. Iranian Journal of Medical Physics, 2 (3). pp. 67-72.

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Official URL: http://ijmp.mums.ac.ir/article_8125.html

Abstract

Introduction:  The  success  of  hyperthermia  depends  on  the  accuracy  of  the  temperature monitoring in the tumor and the surrounding normal tissue. In this study, the temperature changes were determined by computing the speckle displacement in the ultrasound digital images. Speckle tracking algorithm was used to compute the displacement. Materials and Methods: The experiment was performed on Tissue Mimicking (TM) phantoms. The imaging probe used was a commercial type linear array operating at 10 MHz. The speckle displacement  along  the  axial  direction  was  computed  using  Speckle  Tracking  method  and  the temperature  changes  were  obtained  from  the  displacement  data.  Additionally,  the  temperature changes during the heating were invasively measured by NTC thermistors. The results of the two methods were compared against each other.  Results:  There  was  a  good  agreement  between  the  Ultrasonic  temperature  estimation  and  the measurements made by the thermistors. The maximum error and the standard deviation obtained were 0.53 and 0.2°C, respectively.  Discussion  and  Conclusion:  Speckle  tracking  algorithm  is  capable  of  extracting  motion information from both the ultrasounic digital images and radiofrequency (RF) echo signals. The temperature changes can be obtained from the displacement data.Â

Item Type: Article
Subjects: WN Radiology . Diagnostic Imaging
Divisions: Journals > Iranian J Medical Physics
Depositing User: ijmp ijmp
Date Deposited: 21 Jan 2018 15:49
Last Modified: 21 Jan 2018 15:49
URI: http://eprints.mums.ac.ir/id/eprint/9014

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