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Dose Points-based Optimisation (DPO)
Avoid Negative Dwell Times?
1
0.5
Relative Dwell Time
*
cm
** * * * * * * * * * * *
* * * * * * * * * * *
Dosepoints
1
0.25cm
DTGR = 0
1
Small Dwell Time Gradient Restriction
Relative Dwell Time
Dwell Position
Sufficient Dwell Time Gradient Restriction
Relative Dwell Time
0
–0.5
–1
0
5 10 15 20 25
1.95
Catheter
6cm
with
dwell positions
1 5 10 15 20 25
DTGR = 0.01
0
0.2
0.4
.
0.6
0.8
–0.2
–0.4
0
5
10
15
20
25
DTGR = 0.01
1.20
0
0.2
0.4
0.6
0.8
1
0
5
10
15
20
25
DTGR = 0.18
0.40
Dwell Position
Dwell Position
DTGR = 0.18
1.00