As quantum registers scale for computing applications, nuclear magnetic resonance (NMR) imaging at the atomic level becomes essential for understanding qubit composition and operation. Current methods using NV centers in diamond for nanoscale NMR spectroscopy are limited in detecting large spin clusters under ambient conditions and distinguishing interference from strongly coupled spins. Additionally, challenges arise for near-surface NV centers, which require lengthy coherence times or single-shot readouts at room temperature. IAF offers services including the development of characterization schemes for your individual needs, e.g. detection and localization of nuclear spin clusters. We focus on high-precision characterization techniques to facilitate the development of advanced room-temperature quantum processors. These comprise the analysis of NV-doped diamonds using confocal microscopy and pulse schemes for identifying spin clusters