World Hematology 2018 is back with a new information about SBRT
which means Stereotactic Body Radiation Therapy. A
stereotactic radiation treatment for the body is that a specially
designed coordinate-system is used for the exact localization of the tumors
in the body in order to treat it with limited but highly precise
treatment fields where it involves the delivery of a single high dose
radiation treatment or a few fractionated radiation treatments (up to 5
treatments, generally). A high potent biological dose of radiation is
delivered to the tumor, improving the cure rates for the tumor which is
generally not achieved by standard conventional radiation therapy. SBRT has shown better outcomes than conventional radiation therapy.
SBRT
Working: Planning begins with diagnostic imaging to help locate the
tumor which includes four-dimensional imaging, that maps the target area
as it moves over time with the patient’s breathing cycle. In the only
invasive part of the treatment, gold seeds, called fiducials, are
sometimes implanted into the tumor before images are taken. This is
because the fiducials are visible in planning scans which can be used by
the physicians to ensure if high-dose radiation is accurately overlying
the tumor, at the time of treatment. Radiation oncologists work with
medical physicists to develop a radiation plan that ensures safe
exposure to normal structures. Each of the treatment sessions takes 30
to 60 minutes unlike with more invasive therapies, patient leaves each
treatment free of significant pain or side effects. Treatments do not
have to be administered on consecutive days, but the entire course of
therapy is usually concluded within 10 days.
Since
Stereotactic radiotherapy targets the tumour very precisely, the risk
of damage to normal surrounding tissues is low. Therefore the side
effects may be less than with other types of radiotherapy.
Source: http://radonc.ucla.edu/sbrt
No comments:
Post a Comment