Researchers at the University of Warwick have developed a groundbreaking diamond-based magnetic field sensor that could improve the diagnosis of metastatic breast cancer. The innovative device uses the unique properties of diamonds to precisely detect tumors by tracking magnetic tracer fluids that are injected into the body. Especially in the case of cancer that has spread to other organs via the lymph nodes, an accurate diagnosis is crucial to optimize treatment. The new sensor offers a highly sensitive, non-toxic and non-radioactive solution for this.

The compact device, described in the journal Physical Review Applied, is handy and suitable for use in keyhole surgery and endoscopic procedures. With a sensor head size of only 10 millimeters, it can detect even the smallest amounts of magnetic tracer fluid, such as iron oxide nanoparticles – up to one hundredth of the usual clinical dose. This fluid is injected into the tumor and travels to the lymph nodes with metastatic cancer cells, which can then be located using the sensor and surgically removed to stop the cancer from spreading.

The sensor is based on a tiny diamond with nitrogen vacancy centers that can detect magnetic fields with high precision. A small permanent magnet on the probe head eliminates the need for bulky electronics, making the device versatile and easy to use. Compared to traditional methods, which often use radioactive tracers or allergenic dyes, the diamond sensor offers clear advantages: it is safer because it does not cause radioactive materials or allergic reactions, and it can be used in more hospitals.

The development was driven forward in collaboration with clinics that are already successfully using magnetic localization in breast cancer surgery. In the future, the technology could also be used for other types of cancer such as lung, liver, colon or esophageal cancer. In addition, the researchers see potential for the use of the sensor in other areas such as space travel or fusion energy. With the integration of quantum technologies, the sensitivity of the device could be further increased, making the diagnosis and treatment of cancer even more precise and patient-friendly.

Original Paper:

Endoscopic diamond magnetometer for cancer surgery | Phys. Rev. Applied

Editor: X-Press Journalistenbüro GbR

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