banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Dosimetric investigation of breath-hold intensity-modulated radiotherapy for pancreatic cancer
Rent this article for


Image of FIG. 1.
FIG. 1.

Example of an abdominal motion pattern observed by the external respiratory monitoring system during EE–BH. Variations in abdominal motion derived from pulsation of the abdominal aorta and baseline drift were observed.

Image of FIG. 2.
FIG. 2.

Phantom setup. The phantom was made of polystyrene with dimensions of 40 × 40 × 10 cm, and set on a motor-driven base. EDR2 x-ray film was placed at a depth of 4 cm in the phantom, perpendicular to the beam axis. The source–surface distance was 95 cm.

Image of FIG. 3.
FIG. 3.

Boxplots of the ionization chamber measurements. The 95th percentiles of dose deviations between stationary and moving conditions were within ±3%.

Image of FIG. 4.
FIG. 4.

(a) Isodose comparison between stationary (solid) and moving (dashed) conditions, and the γ pass/fail map with the criterion of (b) 2%/1 mm, (c) 3%/3 mm, and (d) 5%/3 mm for the area receiving more than 50% dose for the case with the lowest γ3%/3mm.

Image of FIG. 5.
FIG. 5.

Dose profiles in (left column) lateral direction and (right column) longitudinal direction for the cases with the (a, b) the highest (patient 1, field V) and (c, d) the lowest (patient 7, field V) γ3%/3mm.

Image of FIG. 6.
FIG. 6.

Correlation between BH time and the γ2%/1mm for baseline drift. Negative strong and weak correlations were observed between BH time and the γ2%/1mm for BD0.2mm/s (R = −0.72; p < 0.01) and BD0.4mm/s (R = −0.62; p < 0.01), respectively.

Image of FIG. 7.
FIG. 7.

Histograms of the minimal γ passing rate. Black bar shows the minimal γ3%/3mm and gray the minimal γ5%/3mm. When γ3%/3mm and γ5%/3mm > 90% was considered acceptable, a drift of 5 mm would be the cutoff point.


Generic image for table

Treatment information for each field.

Generic image for table

The γ passing rate for baseline drift.

Generic image for table

Correlations between BH time and the γD%/dm m for BD0.2mm/ s and BD0.4mm/ s.


Article metrics loading...


Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dosimetric investigation of breath-hold intensity-modulated radiotherapy for pancreatic cancer