Dose Constraints

Question 1

for post mastectomy RT what is the coverage for CW (50 Gy in 25 fx)?

Answer 1

V45 >= 95%
Dmax =< 110%
V105% =< 25%

Question 2

for post mastectomy RT what is the coverage for CTV for LNs in axilla?

How about in internal mammary nodes (IMN)?

Answer 2

V45 >= 95%

V45 >= 90%

Question 3

for post mastectomy RT what is the heart constraint?

Answer 3

Mean =< 4 Gy

V25 =< 5%

Question 4

for post mastectomy RT what is the ipsilateral lung constraint?

Answer 4

V20 =< 30% (ideal), 35% acceptable

V5 =< 50%

Question 5

for post mastectomy RT what is the contralateral lung constraint?

Answer 5

V5 =< 10% (ideal), 15% acceptable

Question 6

for WBRT (with no nodes) RT what are the coverages for hypofractionated RT (15fx)

Answer 6

V40.05 >= 90%
V95% >= 100% ideal, >= 95% acceptable
Dmax =< 108%
Minimize 105% volume to < 25% of breast

Question 7

for WBRT (with no nodes) RT what is the constraint for ipsilateral lung?

Answer 7

V20 =< 15%

V5 =< 50%

Question 8

for WBRT (with no nodes) RT what is the constraint for the heart?

Answer 8

Mean =< 4 Gy

Question 9

for WBRT (with no nodes) RT what is the constraint for contralateral lung?

Answer 9

V5 =< 10%

Question 10

for WBRT (with no nodes) RT what is the constraint for contralateral breast?

Answer 10

Dmax < 3 Gy