  Magnetic resonance imaging of spin systems combines scientific applications
in medicine, chemistry and physics. Here, we investigate the pixel-wise
coherent quantum dynamics of spins consisting of a 40 by 40 micron sized region
of interest implanted with nitrogen vacancy centers (NV) coupled to a
nano-magnetic flake of $\mathrm{CrTe_2}$. $\mathrm{CrTe_2}$ is an in-plane van
der Waals ferromagnet, which we can probe quantitatively by the NV electron's
spin signal even at room temperature. First, we combine the nano-scale sample
shapes measured by atomic force microscope with the magnetic resonance imaging
data. We then map out the coherent dynamics of the colour centers coupled to
the van der Waals ferromagnet using pixel-wise coherent Rabi and Ramsey imaging
of the NV sensor layer. Next, we fit the pixel-wise solution of the Hamiltonian
to the quantum sensor data. Combining data and model, we can explore the
detuning range of the spin oscillation with a quantum dynamic range of over
$\left|\Delta_{max}\right|= 60 { }\mathrm{MHz} $ in the Ramsey interferometry
mode. Finally, we show the effect of the $\mathrm{CrTe_2}$ van der Waals magnet
on the coherence of the NV sensor layer and measure a 70 times increase in the
maximum frequency of the quantum oscillation going from the Rabi to the Ramsey
imaging mode.
