Digital radiography versus conventional radiography for the detection of a skull fracture under varying exposure parameters.

Abstract:

RATIONALE AND OBJECTIVES:The effect of varying exposure parameters on the detectability of a fracture with digital and conventional radiography were examined. METHODS:A macerated fractured skull was imaged by film-screen radiography (FSR) and digital storage phosphor radiography (DR) with various exposure values. Five radiologists traced the course of a fracture line. The length of the fracture was reported and the results were analyzed by Student's t test for paired samples. RESULTS:At 35% of the conventional radiation dose, the standard DR screen displayed an average of 48% of the fracture length. The difference from the conventional image (45%) was not significant in this case. An increase of the dose to ten times the conventional dose (250 mAs) yielded no significant improvement in the detectability of the length of the fracture (51%). CONCLUSIONS:This experiment shows that with use of the DR with the standard screen, a dose reduction of approximately 35% appears to be possible without any resulting loss of image quality compared to FSR. Use of the high resolution screens should be avoided, since they require a higher incident image dose than standard screens without offering any diagnostic advantages. The image dose of digital radiographs can be roughly estimated based on the digital device sensitivity value. As a rule, the sensitivity value should range between 100 and 200.

journal_name

Invest Radiol

journal_title

Investigative radiology

authors

Langen HJ,Klein HM,Wein B,Schiwy-Bochat KH,Stargardt A,Günther RW

doi

10.1097/00004424-199303000-00010

subject

Has Abstract

pub_date

1993-03-01 00:00:00

pages

231-4

issue

3

eissn

0020-9996

issn

1536-0210

journal_volume

28

pub_type

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