Conversion device for converting treatment beam for treating lesion of subject
The present invention relates to a conversion device for converting a treatment beam for treating a lesion of a subject, comprising: a collimator unit to which the treatment beam is incident and which has a plurality of slits; and a scattering unit that scatters the treatment beam that has passed through the collimator unit.
1 . A conversion device for converting a treatment beam to treat a subject's lesion, comprising:
a collimator unit on which the treatment beam is incident and in which a plurality of slits are formed, wherein the treatment beam includes a charged particle beam; and
a scattering unit that scatters the treatment beam that has passed through the collimator unit, wherein the scattering unit includes a first scattering unit and a second scattering unit located between the first scattering unit and the lesion, and the first scattering unit and the second scattering unit respectively include a plurality of scattering units having respective levels of scattering and being selectable by a user.
2 . The conversion device of claim 1 , wherein the charged particle beam includes any one of a proton beam, a helium ion beam, and a carbon ion beam.
3 . The conversion device of claim 1 , wherein each of the plurality of slits extends in a predetermined direction, the plurality of slits are formed side by side, and the treatment beam is spatially divided by the plurality of slits.
4 . The conversion device of claim 3 , wherein the treatment beam is incident on the plurality of slits at different angles, and the direction in which the plurality of slits extends is parallel to a corresponding incidence angle.
5 . The conversion device of claim 1 , wherein a distance in which a shortest slit of the plurality of slits extends in a direction in which the treatment beam moves is 1.5 to 10 times a longest depth to which the treatment beam penetrates.
6 . The conversion device of claim 5 , wherein the collimator unit includes first and second collimator units arranged in the direction in which the treatment beam moves.
7 . The conversion device of claim 1 , wherein the collimator unit is made of either brass or tungsten.
8 . The conversion device of claim 1 , wherein the collimator unit is concave toward the lesion.
9 . The conversion device of claim 1 , wherein the treatment beam that has passed through the scattering unit irradiates the lesion, and the treatment beam turns into an undivided beam in the lesion.
10 . The conversion device of claim 1 , wherein the scattering unit includes a metal plate.
11 . The conversion device of claim 10 , wherein a metal of the metal plate has a density of 10 g/cm 3 to 25 g/cm 3 .
12 . The conversion device of claim 11 , wherein the metal of the metal plate includes any one of lead, bismuth, and tungsten.
13 . The conversion device of claim 1 , wherein the treatment beam is converted into spatially divided radiation for treatment while passing through the collimator unit and the scattering unit, and
wherein the conversion device further comprises an absorption unit located between the scattering unit and the lesion and absorbing at least some of the radiation.
14 . The conversion device of claim 13 , wherein the absorption unit is made of either a polymer with a density of 0.7 g/cm 3 to 2 g/cm 3 or a metal with a density of 2 g/cm 3 to 6 g/cm 3 .
15 . The conversion device of claim 13 , wherein a total thickness of an air layer between the collimator unit and the absorption unit is adjustable and ranges from 1 cm to 8 cm.
16 . The conversion device of claim 13 , wherein a gap between the absorption unit and the lesion is adjustable.
17 . The conversion device of claim 2 , further comprising a range shifter that is located between a treatment beam delivery device for delivering the treatment beam and the collimator unit, allows a depth to which the treatment beam penetrates in the subject to become shallower, and is detachable.