OARs

Question 1

Oesophagus radical RT - 55Gy/20#
Spinal cord tolerance

Answer 1

40Gy

Question 2

Oesophagus radical RT - 55Gy/20#
Heart tolerance

Answer 2

V40Gy<30%
Mean <25gy

Question 3

Oesophagus radical RT - 55Gy/20#
Lung tolerance

Answer 3

V20Gy <25%

Question 4

Oesophagus radical RT - 55Gy/20#
Kidney

Answer 4

Each kidney V20Gy <25% (same as lung)
Mean <18Gy

Question 5

Breast RT 40/15
ipsilateral Lung tolerance - No IMC treatment
ipsilateral Lung tolerance - with IMC treatment

Contralateral lung with/without IMC treatment

Answer 5

No IMC treatment
Ipsilateral lung:
V12Gy <15% for 2 fields or <25% for 3 fields;
Mean <4Gy

With IMC treatment
Lung - V17Gy ≤ 35%
mean <4Gy

Contralateral lung: mean <1Gy

Question 6

Breast RT 40/15
Heart tolerance - No IMC treatment
Heart tolerance - with IMC treatment

Answer 6

No IMC treatment
L breast - mean <2Gy
R breast mean <1Gy
V13Gy<10%

With IMC treatment
Heart - V17Gy ≤ 10%,
Mean dose ≤4Gy

Question 7

Breast RT 40/15
Brachial plexus

Answer 7

<40Gy

Question 8

Breast RT 40/15
Spinal cord

Answer 8

≤37Gy

Question 9

Breast RT 40/15
with & without IMC treatment
Contralateral breast

Answer 9

With IMC treatment
Mean ≤ 3.5Gy

Without IMC treatment
Mean <1Gy

Question 10

Breast RT 40/15
with & without IMC treatment
Oesophagus tolerance

Answer 10

With & Without IMC treatment same dose
mean <11Gy
V17Gy <15%

Question 11

Nasopharyngeal nodal staging

Answer 11

N1 - unilateral cervical, or unilateral/bilateral retropharyngeal, all above the cricoid and <6cm
N2 - bilateral cervical, above the cricoid and <6cm
N3 - any cervical node below the cricoid or >6cm

Question 12

Liver tolerance

Answer 12

V30Gy <30%

Question 13

Lung treatment 55/20
Lung OAR tolerance (lung -GTV)

Answer 13

V18 <35%

Question 14

Lung treatment 55/20
Heart OAR tolerance

Answer 14

D100% 36Gy (D100% 44Gy if treating with 60/30)
D67% <44Gy

Question 15

Lung treatment 55/20
Oesophagus OAR tolerance

Answer 15

V50gy <50% (if treating to 55/20) (V50 <33% if 60/30)
Dmax 65Gy

Question 16

lung 55/20
spinal cord

Answer 16

<40Gy (obj) & <44Gy (constraint)

Question 17

Small bowel tolerance

Answer 17

V45Gy <200cc
Aim <35Gy & Dmax 50Gy

Question 18

Rectum dose tolerance

Answer 18

V40Gy <50%

Question 19

Bowel (not small bowel or rectum) tolerance

Answer 19

V40Gy <250cc, dmax <47Gy

Question 20

Bladder tolerance

Answer 20

V40gy <50%

Question 21

Femoral heads tolerance

Answer 21

V40gy<50%

Question 22

Penile bulb tolerance

Answer 22

V22Gy <50%

Question 23

prostate - 60/20
Spinal cord tolerance

Answer 23

<36Gy (approx same as breast)

Question 24

Sarcoma limb corridor

Answer 24

V20Gy <50%

Question 25

Transposed ovary

Answer 25

<8gy

Question 26

Kidney

Answer 26

mean <15Gy