100 Families Support Program Important Note: Due to the large differences between hospitals, some of the methods and contents mentioned in the Xi diary may not be applicable to other radiotherapy departments, and are only used for communication Xi, not as clinical decision-making. Today, we focused on the positioning of patients, mainly including the positioning process of simulated positioning, and the positioning process of the first process.
The "dotted crosshairs" and "solid crosshairs" mentioned in "Radiotherapy Science Xi Diary 03" are just a general idea, plus the content of this article, the problem of these two crosshairs should be clear.
Today's analog positioning is the first of the legs, and the positioning tools used: body positioning frame, vacuum positioning pad, body positioning film.
The main process is as follows:
1) Set up the positioning frame and vacuum pad.
2) The patient takes off his clothes and lies down on the CT bed in a comfortable position.
3) The technician and the doctor adjust the patient's position (the adjustment is more laborious, the patient's movement remains the same, and after lying on the bed, the movement is more laborious).5IRT Note: Is there any product or method that can solve this problem?
4) Move the bed so that the approximate position and the moving laser light are aligned.
5) Remove the softened positioning film from the oven.
6) The technologist reminds the patient that it is "a little hot".
7) Buckle the positioning film, and the technician adjusts the positioning film so that the positioning film is close to the contour of the patient's body surface.
8) Wait a few minutes for the positioning film to set.
9) Move the ** bed so that the irradiated part is aligned with the laser projector.
10) Draw the dotted crosshair sign as indicated by the laser projector and mark the necessary information to draw three".Dotted reticles"., one on each side and one in the middle.
(11) After that, ** bed to zero,
12) Enter the control room and according to the doctor's requirements, pull the flattening sheet to determine the scanning range.
13) After the imaging is completed, the doctor confirms whether all the areas to be irradiated are included, OK
14) Enter the ** room and set the ** bed back to the zero position,".The dotted reticle is aligned with the laser locator light
15) Remind the patient that he cannot move, mark the fixed position of the positioning film on the positioning frame on the positioning film, and the patient's positioning information, such as the position of the hand.
16) Remove the positioning membrane and mark the "dotted reticle" on the patient's body according to the instructions of the laser light, a total of three, one on the left and right, and one in the middle.
17) Remind that patients should not take a bath and not get rid of the marking line.
18) The patient gets out of bed and completes the CT simulation positioning.
19) The completed CT simulation positioning image is sent to the unattended contour delineation workstation to complete the automatic delineation of the endangered organs. Once the delineation is complete, notify the doctor, who will delineate the target area (GTV, CTV) and determine the radiation therapy prescription, including the radiation therapy technique used and the prescribed dose.
For the first time ** and stereotactic**, doctors, physicists, and technologists participate together, and the others** are generally three technologists involved. Two technologists enter the ** room to position the patient, and one technologist observes through the monitoring system in the control room.
The main process is as follows:
1) The patient enters the ** room and removes the necessary clothing.
2) The technician prepares the frame and positioning membrane.
3) Sometimes the patient can spread a hand towel on the ** bed (it will be more comfortable to lie down in this way), 4) the patient lies down on the ** bed with the assistance of a technician or family member, 5) according to the "dotted crosshair" on the patient's body, adjust the ** bed so that the "dotted crosshair" and the laser light are aligned.
6) The technician fine-tunes the patient to make the patient more comfortable and aligns the "dotted crosshair" with the laser projector.
7) Buckle the positioning film and confirm that the "dotted crosshair" on the positioning film is aligned with the laser projector and that it is also aligned with the "dotted crosshair" marked on the patient's body.
8) Move the **bed to ** and isocenter position, that is, the "solid reticle" on the positioning mold is aligned with the laser projector.
From the "dotted crosshair" to the "solid crosshair" as long as a button can be automatically reached, this range of motion will be automatically stored in the information system for the first time, and the patient will follow this information every time in the future, from the "dotted crosshair" one-key movement to the "solid crosshair".
9) After confirming that the "solid reticle" is aligned with the laser projector, everyone except the patient exits the **chamber and is ready to start**.
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