The research work of Paul Lauterbur and Peter Mansfield, the Nobel Prize winners for Medicine in 2003, relates to:

Paul C. Lauterbur and Sir Peter Mansfield were awarded the Nobel Prize in Physiology or Medicine in 2003 for their discoveries concerning magnetic resonance imaging (MRI) [1]. Lauterbur introduced the idea of using magnetic field gradients to localize signals and create two‑dimensional images, while Mansfield developed mathematical and signal‑analysis methods that made the technique fast and clinically practical [2]. Together their work transformed nuclear magnetic resonance from a chemical‑analysis tool into a non‑invasive imaging modality used to visualize internal organs and tissues, revolutionizing medical diagnosis and research [1].

Sources

1. [1] https://www.nobelprize.org/prizes/medicine/2003/7453-the-nobel-prize-in-physiology-or-medicine-2003-2003/
2. [2] https://pubmed.ncbi.nlm.nih.gov/15543844/