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Fig. 1 | Radiation Oncology

Fig. 1

From: A novel amplitude binning strategy to handle irregular breathing during 4DMRI acquisition: improved imaging for radiotherapy purposes

Fig. 1

The 4DMRI reconstruction workflow. a The respiratory-induced motion of the diaphragm is recorded by use of a 1D navigator during the acquisition of 2D coronal slices as the same volume is repeatedly scanned during free breathing. b Outlier rejection is applied. c The respiratory signal is binned. d The acquired 2D images are associated to a respiratory bin. Empty slice/bin positions may occur (dotted square), affecting reconstruction completeness. Multiple image assignments to one bin-slice position occurs (e.g., dashed square), the image redundancy is exploited to quantify the intra-bin variation. e From the bin-slice combinations containing multiple images, the image with the median diaphragm position is selected for 4DMRI reconstruction, resulting in a 4DMRI consisting of 10 respiratory correlated MRI volumes with 11 slices each (f)

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Radiation Oncology

ISSN: 1748-717X

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