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6 Cards in this Set
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Describe the critical structures and constraints when treating esophageal cancer?
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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 |
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You are treating a T1 lung tumor with 12 Gy x 4. What are your constraints?
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Per Fraction/total
cord/brach plex: 6.5/26 esoph/ribs: 7/28 heart/trachea: 7.5/30 great vessels: 12/48 |
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You are treating lung cancer. What are your normal lung and esophagus constraints?
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Combined lungs: mean lung dose < 20-23 Gy, V20<30%, V10< 40%, V5 <60%
Mean Esophageal dose < 34 Gy |
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What are the OAR limits for liver SBRT?
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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) |
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What are standard dose limitations for pancreatic radiation?
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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 |
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Good heart constraint
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V40<50%
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