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Radiation Protection Dosimetry Advance Access originally published online on March 15, 2005
Radiation Protection Dosimetry 2005 113(4):453-455; doi:10.1093/rpd/nch474
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Letter to the editor

Letter to the Editor

W. Huda and K. M. Ogden

SUNY Upstate Medical University, 750 E Adams Street, Syracuse, NY 13210, USA

The first 10% of the full text of this article appears below.

Sir,

Comments on ‘Increasing film-focus distance (FFD) reduces radiation dose for X-ray examinations’ by P.C. Brennan, S. McDonnell and D. O'Leary.

In a recent publication, Brennan et al.(1) claim that increasing the film-focus distance (FFD) from 100 to 130 cm will reduce effective doses (E) by 33% for a pelvic X-ray examination. This conclusion is based on a reported 33% reduction in the entrance surface dose (ESD), by the use of the same effective dose per unit ESD conversion coefficient (E/ESD) at both FFD values. However, E/ESD values are only valid for the specific . . . [Full Text of this Article]

P. C. Brennan and D. O'Leary

UCD School of Diagnostic Imaging, Herbert Avenue Dublin 4, Ireland


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