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. Author manuscript; available in PMC: 2015 Mar 15.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2014 Jan 17;88(4):907–912. doi: 10.1016/j.ijrobp.2013.11.245

Fig. 1.

Fig. 1

Examples of (a) body area (BA) and base BA curves, (b) rescaled BA curve by subtracting BA from base BA, and (c) respiratory phase measured using the BA method. Four-dimensional magnetic resonance images were acquired in axial planes; each slice was imaged continuously throughout the breathing cycle. The BA was determined for each image. For each image slice an individual breathing curve was generated by plotting BA as a function of image acquisition time. The BA curve was generated by plotting all individual breathing curves as a function of acquisition time.