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Why is it important that the patient remain in the same position during each treatment?

Answer examples and advice for how to answer this interview question for a Radiation Therapists interview

Why is it important that the patient remain in the same position during each treatment?

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Why is it important that the patient remain in the same position during each treatment?
1.
The patients treatment plan is based on the original CT and positioning that went along with it. For best results it is crucial that the patient remain in the same position daily to target the tumor area and deliver the full dose to maximize chance of survival.
2.
So that they get appropriate dose in the target area where treatment is required.
3.
To make sure that the radiation is going to the exact spot where it needs to be going which was measured accordingly in their treatment plan and must be consistent throughout treatments.
4.
Radiation therapy is a field that focuses on very precise and accurate treatments. Thinking back to the process of how the patient goes from the CT Simulation to their treatments, it is important to remember that the treatment we deliver and the plan that is approved to deliver the treatment is based on the CT Scan and all the doses and calculations are based on that position from their scan. If they were treated not in the same position, we would not be able to deliver the treatment as per treatment plan.
5.
We want to make sure we are treating the target as accurately as possible and part of doing that is ensuring the patient is in the same poistion. A difference in positon could mean potential underdosing of the target and/or overdosing of critical structures.
6.
Radiation therapy is usually a local treatment. In order for the radiation to be delivered in the most accurate way, the patient has to stay still and the beam has to go to the exact place of where the target tumor is in order for the patient to receive the best dose in an unhealthy cell and not in a healthy cell.
7.
Radiation therapy is location specific, and once the patient is line up with the beams and slight movement or shifts could cause the treatment to be administered on healthy tissue rather than the area of need.
8.
So that the treatment can be given precisely to the cancer whilst avoiding healthy tissues.
9.
The tumor is in a certain location within the patient and the treatment needs to be directed at the cancerous cells every dose, not surrounding healthy tissue.
10.
Because radiation therapy involves targeting specific cells and in order to maintain accuracy, the exact position needs to be reproduced in every therapy session.
11.
To make sure we are treating the correct volume such as the ptv, we are not underdosing the ptv or overdosing surrounding critical organs. To achieve good local control and minimising side effects by irradiating less healthy tissue.
12.
Because the accuracy of the treatment is dependent on the duplication of the exact position the patient was in for their initial treatment.
13.
Radiotherapy is planned very precisely. Movement from the patient could mean healthy structures are radiated and the target volume missed.
14.
Reproducibility of treatment, accurate treatment delivered and no geographical miss.
15.
To reproduce treatment delivery ensuring accuracy and effectiveness.
16.
To limit dose to normal tissue and get proper dose of radiation to desired area.
17.
It is important for patients to remain in the same position because we want to be treating only the position that is planned and nothing more.
18.
It is important for the patient to remain in the same position during treatment. This ensures that the treatment is reproducible and that the radiation is targeted at the treatment volume. If the patient moves during treatment, this could jeopardize the treatment by possibly causing a geographical miss.
19.
To ensure that you are treating the same location each time. If the patient is not in the same position each time you have no idea where exactly you are treating.
20.
Having the patient in the same position is vital to delivering the most accurate treatment.
21.
So that the patient receives the same exact treatment in the same exact spot everyday as it is important to deliver the total radiation dose in a precise location.
22.
Reproducibility due to close margins required, as high doses need to be delivered to the PTV whilst minimising dose to organs at risk. If the patient is in a different position, this leads to geometric uncertainty.
23.
To make sure the same area is being treated each day. It needs to be correct to the millimetre.
24.
For the success of radiotherapy with much or unneccessary associated morbidity,
25.
Reproduction is very important in radiation therapy as the patients treatment is planned with a high degree of accuracy and therefore their position needs to be the same to keep the same degree of accuracy. It will ensure the treatment is delivered how the radiation oncologist has planned it to be delivered with maximum dose to the tumor and minimum dose to the surrounding structures. With the advancement in technology, stabilization has also advanced and with treatments like stereotactic body radiotherapy sub mm accuracy is crucial.
26.
It is important so that the beam is able to hit directly on the targeted area and not any area of the body that is not diseased with cancer.
27.
Because we are using such high energy x-rays that damage any cells along the primary beam. Each patients planned is created specifically for the position they were in simulation, thats where we collected the data of their tumour and their contours and this is used to create their plan. They need to be in the same position every day so that we are treating exactly what we planned from their CT scans. If they are not in the same position everyday, healthy normal tissue and specific organs surrounding the treatment site may receive unneccessay dose. This can cause in later years secondary malignancies.
28.
It is crucial so that the treatment is targeted at the area it needs to be aimed at and so does to healthy tissue is reduced.
29.
The patient was simulated in one position, and the treatment plan was based around this patient positioning. The patient must remain still because the set up relies on remaining consistent from the start of the setup to end of treatment, each day. This will guarantee the Treatment site volumes are as accurate as possible.
30.
You want to give focal radiotherapy - you want to give the treatment to the tumour only and not any other organ.
31.
The patient must be positioned in the same position each treatment to ensure that the treatment that was planned from simulation is as close as clinically possible to the patient for every treatment, and we are in fact treating the target volume are reducing the risk to normal tissue. It is also important that the patient understands this importance.
32.
As treatment irradiates healthy tissue as well as the mass or area it is designed for. The healthy tissue around the mass can be organs that are sensitive and can be damaged by radiation easily. If the patient isnt in exactly the same position as the initial CT then the treatment will not be the same as the plan and will not be as affective.
33.
To ensure that the high doses of radiation are delivered within the clinical treatment field that the doctor has prescribed.
34.
So that you can treat them in exactly the same position every day. Any change in position might mean we have a geographical miss.
35.
Under IRMER the aim of our treatment is to keep dose to normal structures and the the patient as low as reasonably practicable. With the patient in the same position this ensures we are covering our ptv with an accurate dose and keeping the dose to our organs at risk to a minimum. This is beneficial to patients as it means the ptv is recieving the dose intended and that the liklihood and severity of side effects is reduced and ept to a minimum.
36.
It is important so that no unnecessary healthy cells are given a high dose of radiation, and so that the tumour is given the full and effective dose of radiation that has been prescribed by the radiation oncologist. Treatment side effects may increase in severity if the patient moves, whilst the tumour would be receiving a lower dose than planned.
37.
The treatment delievered each day was tailored to the specific position the patient was in when they had their CT. In order to make sure we are treating the correct area and avoiding OARS patients must be in a reproducible position for every treatment.
38.
It is crucial that patients remain in the same position during each treatment to ensure as much accuracy as possible. By maintaining the single position which the treatment is planned around, therapists are able to minimize treating normal healthy tissue surrounding the intended target. If the patient moves however, there is a greater likelihood that normal tissue will be receiving a higher radiation dose than originally accounted for, and the target volume may consequently receive less than prescribed.
39.
Reproducibility goes hand and hand with accuracy. Same daily prosition assures we are treating the correct volume everyday.
40.
Reproducibility is important as we have to treat what was planned. If we dont, we could treat healthy tissues or not treat the tumour with the dose that was prescribed.
41.
Because if the patient moves you would know longer be hitting the tumor and would instead destroy healthy cells and tissue.
42.
It is vital a patient remain in the same position during each treatment so the xrays are given to the same correct place each time.
43.
Immobilisation is important to create a reproducible position to limit dose to the surrounding tissues and structures which in turn will cause less side effects.
44.
To be most effective, radiation therapy must be aimed precisely at the same target or targets each and every time treatment is given. The process of measuring your body and marking your skin to help your team direct the beams of radiation safely and exactly to their intended locations is called simulation.
45.
So that the correct area receives the radiation. Before their treatment begins, radiotherapists make a plan to deduce how much radiation to give and also try their best to make sure that the normal cells receive little radiation.
46.
Due to the movement of the beams the patient has to remain in the same place as to minimize the radiation to organs at risk, and to ensure that the tumor receives the planned and recorded dose.
47.
When the linear accelerator, rotates around the patient it aims to deliver radiation to the area that needs to be treated.However, from the research ive done it has been emphasized tha surronding tissue can be negatively affected by the radiation dose.
48.
Because plannig is being done in one postion, if the patient is moved during treatment then it will lose its target, and normal tissue will be exposed to radiation.
49.
It is important for patients remain in the same position during each treatment to ensure that radiation is delivered with pinpoint accuracy and that other organs do not get exposed to radiation that they are not meant to be delivered to. It prevents the risk of tumour spreading or developing in other parts of the body.
50.
Patient treatment based on positioning from planning scan. Target localisation and organ at risk avoidance dependant on accurate positioning.

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