Iterative prescription refinement in fully discretized inverse problems of radiation therapy planning

Figures & data

Figure 1. Outline of the IPR procedure.

Figure 2. DVH comparison for the fixed ideal prescription and IPR plans. Solid lines represent the fixed prescription dose plan. Dashed lines correspond to the IPR plan. The plans are normalized such that 95% of the PTV receives 100% of the prescription dose (70 Gy). (Available in colour online.)

Figure 3. Dose map for the fixed prescription plan. Colours correspond to different doses (left slider). The PTV is outlined with the green dotted line. The cord, mandible, pharynx and oral cavity are outlined with the blue, orange, light green and purple lines. (Available in colour online.)

Figure 4. Dose map for the IPR plan. Colours correspond to different doses (left slider). The PTV is outlined with the green dotted line. The cord, mandible, pharynx and oral cavity are outlined with the blue, orange, light green and purple lines. (Available in colour online.)

Figure 5. DVH comparison for the fixed ideal prescription and IPR plans. Solid lines represent the fixed prescription dose plan. Dashed lines correspond to the IPR plan. The plans are normalized such that 95% of the PTV receives 100% of the prescription dose (54 Gy). (Available in colour online.)

Table

IDR notations in 7	IPR notations in this article
Data vectors y^(k)	Dose vectors d ^k
Relaxation parameter μ	Relaxation parameter μ
Actual ỹ and ideal ŷ	Assumed
The product operator AS	The identity operator ℐ
The product operator BS
U = (A − μB)S