Abstract
The rewarming process of cryopreserved organs using microwave technology is analyzed by numerical simulation. The FDTD finite-difference time-domain) method is applied to calculate the electromagnetic field in a real microwave rewarming system, composed by a cylindrical resonant cavity, an antenna source, and a frozen rabbit-kidney phantom with temperature-dependent properties. The efficiency of the FDTD codes is improved by nonuniform grid techniques and parallel algorithms. Meanwhile, an apparent specific-heat method is introduced in the temperature-field calculation. Coupling the solutions of the two fields is realized by a formerly developed algorithm. The numerical results show that in the rewarming process of the rabbit kidney phantom, the warming rate can reach 300°-500°C/min, which may prevent devitrification, but the maximum temperature difference in the sample (18 mm in radius) can reach 15°C at the end, which may cause severe thermal stress.
| Original language | English |
|---|---|
| Pages (from-to) | 201-205 |
| Number of pages | 5 |
| Journal | Microwave and Optical Technology Letters |
| Volume | 46 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 5 2005 |
Keywords
- FDTD
- Microwave heating
- Organ cryopreservation
- Parallel algorithm
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering