NDLI: Ultrawideband microwave ablation therapy (UMAT)

Content Provider	IEEE Xplore Digital Library
Author	Topsakal, E. Colebeck, E. Asili, M. Green, R.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Mississippi State Univ., Starkville, MS, USA (Topsakal, E.; Colebeck, E.; Asili, M.; Green, R.)
Abstract	Despite many advantages, there are major problems associated with the current microwave ablation systems. These problems are mainly due to the narrowband nature of the antennas used in these systems. Our data show that although at the start of the ablation procedure more than 90% of the power is transmitted into the tissue due to good antenna-to-tissue impedance matching, as the temperature increases in the tissue, power transmission efficiency drops down to as low as 20%. Such degradation in power delivery creates three major problems: (1) Most of the power is reflected back to the device causing extreme heating and creating unwanted ablation zones beyond the region of interest. Currently, this problem is addressed by cooling the antenna shaft which complicates the probe design and increases the cost. We discuss this issue in detail and provide references in the “background and significance” section. (2) More power from the generator is needed to create the desired ablation zone. Currently, the power levels are as high as 100Watts (W). Our preliminary data suggest that even 20W is enough to create the desired ablation zones with UMAT. (3) Unnecessary increase in ablation time. Total ablation time suffers because of the inefficient power delivery into the tissue.
Sponsorship	IEEE Antennas Propag. Soc.
Starting Page	1
Ending Page	1
File Size	255776
Page Count	1
File Format	PDF
ISBN	9781467347761
e-ISBN	9781467347785
DOI	10.1109/USNC-URSI-NRSM.2013.6525130
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computers Electromagnetic heating Cooling Medical treatment Probes Antennas Ultra wideband technology
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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