[CCoE Notice] FW: MS Thesis Presentation

[Abercrombie, Irene F]

Update regarding time of defense, see changes below in red.

From: engi-dist-bounces at EGR.UH.edu [mailto:engi-dist-bounces at EGR.UH.edu] On Behalf Of Abercrombie, Irene F
Sent: Friday, June 14, 2013 8:41 AM
To: engi-dist at egr.uh.edu
Subject: [CCoE Notice] MS Thesis Presentation

MS Thesis Defense

MEASUREMENTS OF MRI INDUCED HEATING

Miguel A. Peña , Jr.

Date: Monday, June 17th, 2013

Location: ECE Conference Room
Time: 1:00 pm   10:00 am


Committee Chair:
Dr. Ji Chen

Committee Members:
Dr. David R. Jackson
Dr. George Zouridakis


Patients with conductive medical implants are often denied magnetic resonance imaging (MRI) scans; the eddy currents induced on an implant by the MRI radio frequency (RF) signal can render the implant inoperable and also increase its temperature to levels that can harm the patient. This thesis seeks to understand how the insulation and basic dimensions of an elongated implant influence its rise in temperature when scanned. Titanium rods of different diameters, lengths, and insulations were subjected to the RF energy of a 1.5 T, 64 MHz system. Fiber optic temperature probes were used to measure the temperature. Thermal simulations of these experiments were carried out in SEMCAD X. Heating was observed to occur at the ends of the rods. In general, it was discovered that the partially coated rod with the smallest diameter, having its length being close to that of a half-wavelength dipole antenna for the operating frequency of the RF system used, and with partial insulation, experienced the highest increase in temperature.

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