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Direct reconstruction by using CT or MR images
the first dwell position is a problem !
chosen slice
…. 3. 2. 1. 0.
0.
1.
2.
+
offset
catheter “
tip end
“
…. 3. 2. 1. 0.
0.
1.
2.
?
distance ~4mm
1.
2.
3.
X-ray dummy marker