Brachytherapy for Nanoscale Cancer Therapy Using Radioisotopes - Atomic Nanoscale Technology in the Nuclear Industry - page 88

⋅ ( ) ⋅ Λ ⋅ S g r

r

φ ⋅ 60

( ) =

K an

. D r , θ . (8.1)

2

where

Variable Meaning

r Distance.between.source.and.detection.(cm).

θ Angle.of.detection.point.from.y.axis.

D(r, θ ) Absorption.dose.rate.in.detection.point.

Λ Dose.rate.constant.(1.12.cGy/h.U).

S K . Air-kerma.strength.(7.2274.cGy.cm 2 /sec).

1/ r 2 Geometry.factor,.point.source.approximation.

g(r) Radial.dose.function.

φ an Average.anisotropy.factor.(x.axis.point.=.1.0).

8.3 Conclusions
This. study. addresses. the. establishment. of. method. and. accuracy. stan-
dards. for. an. HDR. brachytherapy. treatment. system.. There. are. many. pos-
sibilities.for.application.in.human.organs..The.important.points.are.how.to.
construct. the. reasonable. radiation. dose. and. therapy. planning. in. the. hos-
pital.. Brachytherapy. is. an. example. of. nanoscopic. technology. in. radiation.
applications.

References
American.Association.of.Physicists.in.Medicine.(AAPM)..1994.. Comprehensive QA for
radiation oncology ..Report.of.Task.Group.No..40..College.Park,.MD:.AAPM.
American.Association.of.Physicists.in.Medicine.(AAPM)..1995.. Dosimetry of interstitial
brachytherapy sources ..Report.of.Task.Group.No..43..College.Park,.MD:.AAPM.
American. Association. of. Physicists. in. Medicine. (AAPM).. 1997.. Code of practice for
brachytherapy physics ..Report.of.Task.Group.No..56..College.Park,.MD:.AAPM.
DeWerd,.L..A.,.G..S..Ibbott,.A..S..Meigooni,.et.al..2011..A.dosimetric.uncertainty.analy-
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Hrycushko,.B..A.,.A..N..Gutierrez,.B..Goins,.et.al..2011..Radiobiological.characteriza-
tion. of. post-lumpectomy. focal. brachytherapy. with. lipid. nanoparticle-carried.
radionuclides.. Phys. Med. Biol. 56:703.