2015
DOI: 10.1016/j.ijrobp.2014.10.050
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Abstract: A robust 4D-MRI method, based on clinically available protocols, is presented and successfully applied to characterize the abdominal motion in a small number of pancreatic cancer patients.

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Cited by 63 publications
(88 citation statements)
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“…9 Stemkens B, et al compared 2 surrogate signals (external bellows and internal navigator) and 2 MR sampling strategies (Cartesian and radial) and constructed 4D-MRI by resorting 2D K-space data. 10 All of these 4D-MRI methods have adopted similar concept used in 4D-CT and have shown promise in capturing more comprehensive anatomical information, however they have also inherited the same stitching artifacts resulted from 2D imaging-space resorting 711 . Another significant limitation is the anisotropic resolution due to the large slice thickness of cine 2D-MRI.…”
Section: Introductionmentioning
confidence: 99%
“…9 Stemkens B, et al compared 2 surrogate signals (external bellows and internal navigator) and 2 MR sampling strategies (Cartesian and radial) and constructed 4D-MRI by resorting 2D K-space data. 10 All of these 4D-MRI methods have adopted similar concept used in 4D-CT and have shown promise in capturing more comprehensive anatomical information, however they have also inherited the same stitching artifacts resulted from 2D imaging-space resorting 711 . Another significant limitation is the anisotropic resolution due to the large slice thickness of cine 2D-MRI.…”
Section: Introductionmentioning
confidence: 99%
“…To reduce the effect of the breathing variation in 4D‐MRI, prospective imaging techniques utilize a scan triggering method. However, prospective methods usually require a long total scan time and produce a low contrast resolution . In contrast, conventional retrospective 4D‐MRI methods utilize a sorting method based on respiratory surrogate signals thus, requiring much shorter imaging time.…”
Section: Discussionmentioning
confidence: 99%
“…Both retrospective and prospective approaches have been continuously improved, but there are still weaknesses. For instance, prospective imaging techniques frequently require a long total scan time when breathing motion varies from breath to breath and the image quality can be highly subject to the size of the respiratory triggering window . On the other hand, retrospective image techniques often suffer from considerable image artefacts (i.e.…”
Section: Introductionmentioning
confidence: 99%
“…Retrospective 4D MRI usually suffers from long acquisition time (5–30 min) (Tryggestad et al , 2013; Stemkens et al , 2015; Han et al , 2017; Cai et al , 2011). Rank et al 2017 developed a method to generate retrospective 4D MRI with an acquisition time of under 40 seconds, but the reconstruction time varied between 5.5 and 7.5 hours (Rank et al , 2017).…”
Section: Introductionmentioning
confidence: 99%