Berks County Medical Society Medical Record Fall 2019 - 22

First of its Kind Cancer Fighting Technology Coming to Berks County: The MR-Linac
continued from page 21

treatment, either X-rays or low-resolution CT scans, to make
sure they are in the right position and the radiation is going to its
intended target volume. There are even ways of tracking a tumor in
real time during radiation by tracking a marker that is implanted
into or close to the tumor. However, none of these approaches offer
the clarity, detail, and precision of real-time MR imaging. This can
be appreciated in Figure 2, showing a prostate cancer patient with
the prostate, bladder, and rectum clearly defined on the MR-Linac
imaging on the left compared to the lower resolution of the CT
capabilities of current non-MR-Linacs on the right.

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Along with the confidence of seeing what is being treated and
security that the tumor is only treated if it is within the designated
volume comes the potential to decrease the planning margin. This
allows for significantly lower radiation dose to the surrounding
normal structures, potentially decreasing side effects. Conversely
this machine offers the potential to increase the dose to the tumor,
safe in the knowledge that it is indeed going to the tumor and not
normal tissue. This increases the likelihood of cure. An added benefit
that is built in to the MR-Linac is simply the collection of daily MR
imaging itself. This can show the evolution of a treatment area over
time and potentially lead to adapting the treatment to any changes in


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Berks County Medical Society Medical Record Fall 2019

Table of Contents for the Digital Edition of Berks County Medical Society Medical Record Fall 2019

Berks County Medical Society Medical Record Fall 2019 - 1
Berks County Medical Society Medical Record Fall 2019 - 2
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