Today, the department came to a ** businessman who sells radiotherapy positioning line markers, and he said a lot of various advantages of the markers he sells, and one of the core is "not afraid to take a bath", * about 100.
Although the radiotherapy positioning line is a very small thing, its importance and impact are indeed very large.
The marker pen currently used in the department is easy to drop, although doctors have repeatedly reminded them not to take a bath, not to this, not to that. However, there are still patients whose positioning lines become unclear. Although the patient has paid attention, the positioning line becomes unclear for some reasons, such as when sleeping, turning back and forth against the bedding, or the patient sweating.
As a result, I see that the technician redraws the positioning line every time he is positioning. In addition, many patients have also purchased markers, and if they find that they are not clear, they can also redraw them themselves.
For the hotter areas in the south, if the patient does not take a bath for a month, it is really uncomfortable.
I heard that there is a method similar to that of tattoos, and the positioning line is drawn, but after radiotherapy, how to remove the positioning line is a problem.
Ladies and gentlemen, what methods have been adopted by your department for the care of radiotherapy positioning lines, please leave a message to 5IRT.
The potential market estimate of the positioning line marker: the unit price is 100 yuan, the radiotherapy patient is 1 million, and the total potential market is about 100 million.
Radiotherapy Science Xi Diary 04" mentioned in the case where the irradiation site is the humerus,
Starting today, the following is the location of the bed in the center of the **
It can be seen from the coordinates of the bed that the displacement in the LAT direction, that is, in the X direction, is very large, and the limit value of the C-arm accelerator** bed is generally around 24, so this patient can barely **.
For the O-shaped accelerator, the limit position of its ** bed is about 21. So for this case, can the O-shaped accelerator still be **?Please help 5IRT to make an assessment of whether it can, and if not, what methods will be used.
The following are the ** bed parameters of the two O-shaped accelerators:
There are no 6D beds in the department for the time being.
The position is adjusted by using CBCT or optical body surface system, because there is no 6D bed, and the bed can only be moved in three directions: left-right, inferior-superior, and anterior-posterior, to correct the patient's position.
However, the actual error is not only the three mentioned above, but also the position deviation caused by the distortion of the patient's body is only adjusted in the three directions of x, y, and z, which is difficult or impossible to achieve.
The current practice can only be to repeatedly enter the ** room according to the experience of the technologist and adjust the patient, such as making the patient's head raise or nod down.
In addition to the traditional three directions, the reset of the six-dimensional bed adds three angles in the stereo direction, namely pitch, yaw and roll. If you have a 6D bed, it will be much easier to adjust the position deviation due to the slight distortion of the patient.
Some people may think (5IRT thinks so) that radiotherapy is a few millimeters and 1 degree away, and it will not have any effect on the results, and it is also within the margin of error, and it can be carried out.
But in actual clinical application, when using CBCT guidance, a millimeter-level deviation is found, or a deviation of about 1 degree, if it is you, do you adjust this deviation, or accept the deviation to continue?
Some netizens asked questions about positioning film ovens. I asked Mr. L today.
Using an oven to soften the positioning film is still advantageous to the water tank, and the water problem of the water tank is a difficult problem to solve, which brings a lot of trouble to both the technician and the patient.
The oven can soften two positioning membranes at a time.
There may be one disadvantage that is not a disadvantage compared to an oven and a water tank. For example, if the positioning film needs to be softened twice, the oven will not be able to do it, and the water tank will not be a problem.
The days of the Xi of radiotherapy science have passed unconsciously, and these 6 days have been very fruitful. In these 6 days, I have learned most of the work related to physicists, including simulation positioning, plan design, plan verification, equipment quality control, and implementation. In the future, the main thing is to further familiarize yourself with and master these tasks, and more importantly, to do it yourself, because the gap between what you say and what you do is still quite large.
Today, Mr. L gave me a TPS account, and from tomorrow, I will focus on learning Xi TPS.
Welcome to pay attention, stay tuned!
———end———
100 help plan