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New weighted maximum-intensity-projection images from cine CT for delineation of the lung tumor plus motion
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10.1118/1.4803534
/content/aapm/journal/medphys/40/6/10.1118/1.4803534
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/6/10.1118/1.4803534

Figures

Image of FIG. 1.
FIG. 1.

Two candidate images at the end-inspiration phase of 0% in a cine CT scan for 4D-CT. Each diamond indicates one phase of CT image. The respiratory phases are shown from the 0% pointed by the arrows to the 50% at the lowest level (end expiration phase) back to 100% or 0% (end inspiration phase). Only one of the two images at 0% is selected for 4D-CT, and the other one is discarded even though it may contain additional information of the tumor motion.

Image of FIG. 2.
FIG. 2.

Illustration of insufficient contrast in both the MIP and mip images for depicting a tumor. Example of the tumor in the EI phase (a) and only the diaphragm in the EE phase (b). The mip and MIP images of the EI and EE phases are shown in (c) and (d), respectively. Both mip and MIP images do not show the tumor in (a), the EI phase.

Image of FIG. 3.
FIG. 3.

Identification of an overlap region from the mip (a) and MIP (b) images for the processing of wMIP. The cine CT images covering the diaphragm positions of the EI phase in (a) and EE phase in (b) are interrogated for the largest tumor presence.

Image of FIG. 4.
FIG. 4.

Selection of the largest tumor in cine CT images. The seven images at the same slice location over a respiratory cycle are reviewed, and the highlighted slice with a tumor pointed by an arrow is chosen and kept for the wMIP image.

Image of FIG. 5.
FIG. 5.

Data of one patient. The coronal images of (a) MIP, (b) wMIP, (c) EI phase, and (d) EE phase are superimposed by a tumor contour drawn on the images in (a) and (b).

Image of FIG. 6.
FIG. 6.

Data of one patient. The coronal images of (a) MIP, (b) wMIP, (c) EI phase, and (d) EE phase are superimposed by a tumor contour drawn on the images in (a) and (b).

Tables

Generic image for table
TABLE I.

The iGTVs determined by 4D-CT and wMIP of seven patient studies. The difference in % between the 4D-CT and wMIP is tabulated in the last column.

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/content/aapm/journal/medphys/40/6/10.1118/1.4803534
2013-05-06
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: New weighted maximum-intensity-projection images from cine CT for delineation of the lung tumor plus motion
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/6/10.1118/1.4803534
10.1118/1.4803534
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