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Table 2 Objectives for IMRT treatment planning of plan-PO

From: Does Intensity Modulated Radiation Therapy (IMRT) prevent additional toxicity of treating the pelvic lymph nodes compared to treatment of the prostate only?

Target Volumes

 

D min

D 95

D max

PTV-1

56 Gy

60 Gy

 

PTV-2

70 Gy

74 Gy

80 Gy

Organs at risk

PTV-1 sine PTV-2

Max 74 Gy to 5%

Max 66 Gy to 50%

Dmax 78 Gy

Help contour ring 1.5 cm

Max 60 Gy to 10%

Max 45 Gy to 50%

 

Bladder (BV)

Max 70 Gy to 5%

Max 50 Gy to 20%

Max 30 Gy to 30%

Rectal volume sine PTV

Max 60 Gy to 5%

Max 40 Gy to 20%

Max 20 Gy to 40%

Seminal vesicles

Max 65 Gy to 20%

  
  1. "PTV-1 sine PTV-2" is this proportion of the PTV-1 that does not overlap with PTV-2 – it is listed in organs-at-risk to limit doses >74 Gy to PTV-2. "Rectal volume sine PTV" is the portion of the rectum located outside PTV-1. These objectives were adjusted for the patient's anatomy to achieve optimal results. "Help contour ring" is a 15 mm wide ring shaped contour around the PTV-1 to confine high and mid doses to the target volume.
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Radiation Oncology

ISSN: 1748-717X

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