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Advisor(s)
Abstract(s)
Introduction:
The quantification of th
e differential renal function in
adults can be
difficult due to many factors
-
on
e of
the
se is
the variances in
kidney depth and
the
attenuation related with
all the tissue
s
between the kidney and the camera. Some authors
refer that t
he lower attenuation i
n p
ediatric patients makes
unnecessary
the
use
of
attenuation correction
algorithms.
This study
will com
pare the values
of differential renal function
obtained with
and
with
out
attenuation correction
techniques
.
Material and Methods:
Images
from
a group consisting of
15
individuals (aged
3
years
+/
-
2) were used and two attenuation correction method
s
were
applied
–
Tonnesen
correction factors and the geometric mean method
. The mean time of acquisition (time
post
99m
Tc
-
DMSA administration) was 3.5 hours +/
-
0.8h.
Results:
T
he absence of any method of attenuation correction
apparently seems to lead
to
consistent
values that seem
to
correlate
well
with the
ones obtained
with the
incorporation of
methods of attenuation correction
.
The differences found between the
values obtained with and without attenuation correction
were not
significant.
Conclusion: T
he decision of not
doing
any kind of attenuation correction method can
apparently
be justified by the minor differences verified on the relative kidney uptake
values. Nevertheless, if it is recognized that there is a need for
a really
accurate value of
the
relative kidney uptake, then an attenuation correction method should be used.
Description
Keywords
Citation
Publisher
Instituto Politécnico do Porto. Escola Superior de Tecnologia da Saúde do Porto