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A customized bolus produced using a 3-dimensional printer for radiotherapy.

Kim SW, Shin HJ, Kay CS, Son SH - PLoS ONE (2014)

Bottom Line: Boluses are used in high-energy radiotherapy in order to overcome the skin sparing effect.In practice though, commonly used flat boluses fail to make a perfect contact with the irregular surface of the patient's skin, resulting in air gaps.The dosimetric parameters of the resulting 3D printed flat bolus showed that it was a useful dose escalating material, equivalent to a commercially available flat bolus.

View Article: PubMed Central - PubMed

Affiliation: Radiation Oncology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

ABSTRACT

Objective: Boluses are used in high-energy radiotherapy in order to overcome the skin sparing effect. In practice though, commonly used flat boluses fail to make a perfect contact with the irregular surface of the patient's skin, resulting in air gaps. Hence, we fabricated a customized bolus using a 3-dimensional (3D) printer and evaluated its feasibility for radiotherapy.

Methods: We designed two kinds of bolus for production on a 3D printer, one of which was the 3D printed flat bolus for the Blue water phantom and the other was a 3D printed customized bolus for the RANDO phantom. The 3D printed flat bolus was fabricated to verify its physical quality. The resulting 3D printed flat bolus was evaluated by assessing dosimetric parameters such as D1.5 cm, D5 cm, and D10 cm. The 3D printed customized bolus was then fabricated, and its quality and clinical feasibility were evaluated by visual inspection and by assessing dosimetric parameters such as Dmax, Dmin, Dmean, D90%, and V90%.

Results: The dosimetric parameters of the resulting 3D printed flat bolus showed that it was a useful dose escalating material, equivalent to a commercially available flat bolus. Analysis of the dosimetric parameters of the 3D printed customized bolus demonstrated that it is provided good dose escalation and good contact with the irregular surface of the RANDO phantom.

Conclusions: A customized bolus produced using a 3D printer could potentially replace commercially available flat boluses.

Show MeSH
Percent depth dose (PDD) at the central axis in the Blue water phantom study.(a) PDD calculated from the treatment planning system and (b) PDD measured from the film.
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pone-0110746-g003: Percent depth dose (PDD) at the central axis in the Blue water phantom study.(a) PDD calculated from the treatment planning system and (b) PDD measured from the film.

Mentions: The differences between the calculated and measured doses were less than 1%, indicating that the dose distribution can be calculated to a very high degree of accuracy when the 3D printed bolus was applied. The PDD from the TPS and film dosimetry are shown in Figure 3, and the shapes of the plots of the calculated PDD from the TPS are similar to those for the measured PDD from the film.


A customized bolus produced using a 3-dimensional printer for radiotherapy.

Kim SW, Shin HJ, Kay CS, Son SH - PLoS ONE (2014)

Percent depth dose (PDD) at the central axis in the Blue water phantom study.(a) PDD calculated from the treatment planning system and (b) PDD measured from the film.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4206462&req=5

pone-0110746-g003: Percent depth dose (PDD) at the central axis in the Blue water phantom study.(a) PDD calculated from the treatment planning system and (b) PDD measured from the film.
Mentions: The differences between the calculated and measured doses were less than 1%, indicating that the dose distribution can be calculated to a very high degree of accuracy when the 3D printed bolus was applied. The PDD from the TPS and film dosimetry are shown in Figure 3, and the shapes of the plots of the calculated PDD from the TPS are similar to those for the measured PDD from the film.

Bottom Line: Boluses are used in high-energy radiotherapy in order to overcome the skin sparing effect.In practice though, commonly used flat boluses fail to make a perfect contact with the irregular surface of the patient's skin, resulting in air gaps.The dosimetric parameters of the resulting 3D printed flat bolus showed that it was a useful dose escalating material, equivalent to a commercially available flat bolus.

View Article: PubMed Central - PubMed

Affiliation: Radiation Oncology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

ABSTRACT

Objective: Boluses are used in high-energy radiotherapy in order to overcome the skin sparing effect. In practice though, commonly used flat boluses fail to make a perfect contact with the irregular surface of the patient's skin, resulting in air gaps. Hence, we fabricated a customized bolus using a 3-dimensional (3D) printer and evaluated its feasibility for radiotherapy.

Methods: We designed two kinds of bolus for production on a 3D printer, one of which was the 3D printed flat bolus for the Blue water phantom and the other was a 3D printed customized bolus for the RANDO phantom. The 3D printed flat bolus was fabricated to verify its physical quality. The resulting 3D printed flat bolus was evaluated by assessing dosimetric parameters such as D1.5 cm, D5 cm, and D10 cm. The 3D printed customized bolus was then fabricated, and its quality and clinical feasibility were evaluated by visual inspection and by assessing dosimetric parameters such as Dmax, Dmin, Dmean, D90%, and V90%.

Results: The dosimetric parameters of the resulting 3D printed flat bolus showed that it was a useful dose escalating material, equivalent to a commercially available flat bolus. Analysis of the dosimetric parameters of the 3D printed customized bolus demonstrated that it is provided good dose escalation and good contact with the irregular surface of the RANDO phantom.

Conclusions: A customized bolus produced using a 3D printer could potentially replace commercially available flat boluses.

Show MeSH