研究目的
To explore the actual risks of tattooed individuals subjected to MRI by measuring the magnetic and electrical properties of tattoo inks to investigate their interaction with MRI electromagnetic fields.
研究成果
The magnetic and electrical properties of tattoo inks vary significantly by type, with differences observed between ink solutions and pigments. Electrical conductivity values are comparable to dry skin, but permittivity requires further investigation. The findings emphasize the need for detailed characterization to assess MRI safety risks, with ongoing research focused on pigments and numerical simulations for heating effects.
研究不足
The electrical permittivity evaluation was unsatisfactory due to parasitic phenomena like double layer effects and electrode polarization, especially at low frequencies. The cell dimensions for electrical measurements were limited by the amount of tattoo ink available. Future work is needed to extend electrical characterization to pigments and investigate heating effects via numerical simulations.
1：Experimental Design and Method Selection:
The study involved magnetic and electrical characterization of tattoo inks and pigments to assess interactions with MRI fields. Magnetic properties were measured using a vibrating sample magnetometer, and electrical properties were measured using an impedance analyzer with a liquid test fixture. A fitting process was used to account for parasitic effects in electrical measurements.
2：Sample Selection and Data Sources:
Five different tattoo ink colors (black, white, yellow, red, blue) were selected. Ink solutions were dried to obtain pigments for comparison.
3：List of Experimental Equipment and Materials:
Lakeshore 7410 Vibrating Sample Magnetometer (VSM), Agilent 4294A Precision Impedance Analyzer, 16452A Liquid Test Fixture, professional oven for drying inks, milling equipment for pigments.
4：Experimental Procedures and Operational Workflow:
For magnetic measurements, samples were placed in the VSM, and magnetic moment was measured and normalized by weight. For electrical measurements, the liquid test fixture was filled with ink, and impedance was measured over a frequency range. Ink solutions were dried at 150°C for two hours and milled to powder for pigment measurements.
5：Data Analysis Methods:
Magnetic data were analyzed using RockMag Analyzer software. Electrical conductivity was estimated directly from measurements at 1 MHz and through a fitting process using an equivalent circuit model to account for parasitic effects.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
