Noise Power Spectrum

General
1

Hello,

I am looking for a way to plot the noise power spectrum for a Catphan504 (though I assume the process is similar for other CatPhans). I know that the results_data() method provides values like the maximum and the mean, but I am specifically interested in generating the graph.

I attempted the method described in the documentation, but it didn’t work as expected. Is there an alternative way to access and plot this graph?

Regards,
Safir

2 
from matplotlib import pyplot as plt

from pylinac import CatPhan504
from pylinac.core.nps import plot_nps1d

ct = CatPhan504.from_demo_images()
ct.analyze()
plot_nps1d(ct.ctp486.power_spectrum_1d)
plt.show()
3

Thank you you’re the best!