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Siddon’s raytracing algorithm

ℎ from A to B ( ) = + − = + − = ( − ) 2 +( − ) 2

Point A: a =0

Y

1

Y

ℎ

2

=

+ − 1 + − 1

1

= 1

. . .

Point B: a =1

, = ( − )/( − ) , = ( − )/( − ) = ,

Y

N

1

…

X

X

X

=

෍ ( −

)

1

2

N

−1

,

, ( )

Siddon, Med Phys 12:252, 1985