Abstract #1652
Using a Double Echo Steady State (DESS) Sequence to Monitor Thermal Treatments
Juan Plata 1,2 , Kristin Granlund 2 , Brian Hargreaves 2 , and Kim Butts Pauly 2
1
Bioengineering, Stanford University,
Stanford, CA, United States,
2
Radiology,
Stanford University, Stanford, CA, United States
Monitoring thermal treatments using a double echo steady
state (DESS) sequence can allow for real-time lesion
visualization. Proton resonant frequency changes from
the first echo can be used to compute changes in
temperature, while associated changes in signal
intensity of the second echo are related to changes in
T1, T2, and ADC. All these parameters have been
previously associated with irreversible changes in
tissue viability. Our work focused on empirically
determining how these parameters changed in an egg-white
phantom, and then using this information to simulate and
validate signal changes for our DESS signal during
heating of an egg.
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