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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Invest Radiol. 2018 May;53(5):293–305. doi: 10.1097/RLI.0000000000000442

Figure 2.

Figure 2

Maximum detection using (a) real and (b) imaginary parts, as well as (c) phase and (d) magnitude, of the complex projections. The red curves were obtained by filtering the maximum detection results with a low-pass filter with a 1 Hz cutoff frequency. None of these schemes could capture the underlying respiratory content.