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6 Cards in this Set

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Describe the critical structures and constraints when treating esophageal cancer?
QUANTEC:
Kidneys: at least 2/3 of one kidney <20 Gy
Heart: V45<2/3 V60<1/3

Lung: V20<30%, V10< 40%, V5 <60%, mean lung dose < 20-23 Gy, VS 5Gy (volume of lung receiving 5 Gy or less) at least 3000cc
Liver: mean dose less than 25 Gy (normal liver minus gross disease), keep V30 < 50%
Spinal Cord: no point dose > 50 Gy
You are treating a T1 lung tumor with 12 Gy x 4. What are your constraints?
Per Fraction/total
cord/brach plex: 6.5/26
esoph/ribs: 7/28
heart/trachea: 7.5/30
great vessels: 12/48
You are treating lung cancer. What are your normal lung and esophagus constraints?
Combined lungs: mean lung dose < 20-23 Gy, V20<30%, V10< 40%, V5 <60%
Mean Esophageal dose < 34 Gy
What are the OAR limits for liver SBRT?
60 Gy in 3 fractions:
Liver:700 cc of norml liver < 15Gy
Cord max: 18 Gy
Other organs to consider and evaluate are chest wall, stomach, small bowel, and skin.
(Chest well: V30 , 10 cc
Stomach: max 22 Gy, V 16.5 < 10 cc
Small Bowel: max 22 Gy, V16.5 < 5 cc
skin V30 < 10 cc)
What are standard dose limitations for pancreatic radiation?
Liver: mean dose less than 25 Gy (normal liver minus gross disease), keep V30 < 50%
Spinal Cord: no point dose > 50 Gy
Kidneys: At least 2/3 of one kidney <20 Gy
small bowell V45<195 cc Quantec
Good heart constraint
V40<50%