Untuned MPI relaxometer for nanoparticle characterization at arbitrary frequencies
- Resource Type
- Conference
- Authors
- Tay, Zhi Wei; Goodwill, Patrick W.; Hensley, Daniel W.; Conolly, Steven
- Source
- 2015 5th International Workshop on Magnetic Particle Imaging (IWMPI) Magnetic Particle Imaging (IWMPI), 2015 5th International Workshop on. :1-1 Mar, 2015
- Subject
- Bioengineering
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Signal Processing and Analysis
Nanoparticles
Chirp
Signal to noise ratio
Iron
Electron tubes
Frequency measurement
Digital filters
- Language
MPI resolution and SNR are driven by the magnetic response of the iron oxide nanoparticles. Prior work has shown that magnetic nanoparticles respond differently to a wide range of excitation frequencies and amplitudes. Most prior work on MPI spectrometers and relaxometers have tuned the transmit coil at a single frequency. 1-3 In contrast, in this work, we have constructed an agile frequency and amplitude relaxometer capable of reaching excitation fields of 0–60 mTpp across a continuous frequency range of DC-150 kHz without requirement of capacitors for tuning to discrete frequencies.