Lung phantom unit for radiotherapy
A lung phantom unit for radiotherapy according to an embodiment of the present disclosure may arrange, at a location not affected by a magnetic field, a phantom driving cylinder and a driving device which may move a lung mimic and a tumor mimic in a lung simulation block. The lung phantom unit may be used for general purpose even as a phantom for MRI-based and CT image-based radiotherapy. Since lung and tumor motions are implemented by air injection, it may be possible to precisely measure the motion and volume change of a lung according to subtle changes in air pressure so that customized radiotherapy suitable for a patient having various breathing patterns is possible.
1. A lung phantom unit for radiotherapy, comprising:
a lung simulation block comprising a phantom human mimic filled with a liquid inside, a lung mimic accommodated in the phantom human mimic and contracted and expanded according to an inflow of external air, and a tumor mimic disposed inside the lung mimic;
a phantom driving cylinder fluid-movably connected to the lung mimic at a position spaced apart from the lung simulation block;
a driving device configured to compress and expand air accommodated in the phantom driving cylinder;
a connection tube having one side communicatively connected to the phantom driving cylinder and the other side communicatively connected to the lung simulation block and formed to have a long length along a central axis direction of the phantom human mimic, so that an operation of the driving device is not affected by a magnetic field or an electric field formed by a capturing unit for securing an image of the lung simulation block;
a sensing tube communicatively connected to the lung mimic and the phantom driving cylinder; and
a lifting member comprising a rod portion installed on the sensing tube to be liftable and formed long along a lifting direction, and a mounting portion formed as a plate structure on an upper side of the rod portion and on which an object that enables image capture with respect to a lifting operation is placed.
2. The lung phantom unit for radiotherapy of claim 1 , wherein the driving device comprises:
a motor;
a pressing disk movably installed in a chamber and moved by receiving power of the motor so as to compress and expand the air accommodated in the phantom driving cylinder; and
a pressing rod having one side connected to the motor and the other end connected to the pressing disk so as to be moved together with the pressing disk, to dynamically connect the motor and the pressing disk.
3. The lung phantom unit for radiotherapy of claim 2 , wherein the driving device further comprises:
a nut member provided on the pressing rod; and a transfer screw formed long along an axis in one direction, connected to a drive shaft so as to be rotated together with the drive shaft of the motor, and screw-coupled with the nut member.
4. The lung phantom unit for radiotherapy of claim 1 , wherein the lung simulation block is made of a non-metal material.
5. The lung phantom unit for radiotherapy of claim 1 , wherein the connection tube is in the form of a flexible corrugated tube so that length expansion and contraction is possible.
6. The lung phantom unit for radiotherapy of claim 1 , further comprising:
a first shelf on which the lung simulation block is installed and a second shelf on which the driving device is installed,
wherein the first shelf and the second shelf are installed to be movable relative to each other so as to enable length adjustment.
7. A lung phantom unit for radiotherapy, comprising:
a lung simulation block comprising a phantom human mimic filled with a liquid inside, a lung mimic accommodated in the phantom human mimic and contracted and expanded according to an inflow of external air, and a tumor mimic disposed inside the lung mimic;
a phantom driving cylinder fluid-movably connected to the lung mimic at a position spaced apart from the lung simulation block;
a driving device configured to compress and expand air accommodated in the phantom driving cylinder;
a connection tube having one side communicatively connected to the phantom driving cylinder and the other side communicatively connected to the lung simulation block and formed to have a long length along a central axis direction of the phantom human mimic, so that an operation of the driving device is not affected by a magnetic field or an electric field formed by a capturing unit for securing an image of the lung simulation block; and
a first shelf on which the lung simulation block is installed and a second shelf on which the driving device is installed,
wherein the first shelf and the second shelf are installed to be rotatable relative to each other so as to enable angle adjustment.