Orbital tumor irradiation using non-coplanar beams.

Abstract:

:Irradiation of the orbit is often associated with substantial dose inhomogeneity resulting from the insertion of lens blocks. We postulated that such dose inhomogeneity, which often exceeds 40%, could be halved by the use of two pairs of wedged beams, one angled in the sagittal plane and the other in the commonly employed transverse plane. The sagittal plane is obtained by turning the treatment couch 90 degrees. All beams carried a central-axis lens block and were angled 30 degrees relative to the vertical. Verification of dose distribution was obtained by film dosimetry in a head phantom for central- and off-axis planes. These measurements indicate that significant improvement in dose homogeneity over alternate methods can be achieved with this technique.

journal_name

Radiology

journal_title

Radiology

authors

Harisiadis L,Schell MC,Working KR,Justice T,Wessels BW,Ling CC

doi

10.1148/radiology.156.3.4023250

subject

Has Abstract

pub_date

1985-09-01 00:00:00

pages

823-4

issue

3

eissn

0033-8419

issn

1527-1315

journal_volume

156

pub_type

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