Abstract：
RATIONALE AND OBJECTIVES:Diffraction-enhanced imaging (DEI) is a type of phase contrast x-ray imaging that has improved image contrast at a lower dose than conventional radiography for many imaging applications, but no studies have been done to determine if DEI might be useful for diagnosing lung injury. The goals of this study were to determine if DEI could differentiate between healthy and injured lungs for a rat model of gastric aspiration and to compare diffraction-enhanced images with chest radiographs. MATERIALS AND METHODS:Radiographs and diffraction-enhanced chest images of adult Sprague Dawley rats were obtained before and 4 hours after the aspiration of 0.4 mL/kg of 0.1 mol/L hydrochloric acid. Lung damage was confirmed with histopathology. RESULTS:The radiographs and diffraction-enhanced peak images revealed regions of atelectasis in the injured rat lung. The diffraction-enhanced peak images revealed the full extent of the lung with improved clarity relative to the chest radiographs, especially in the portion of the lower lobe that extended behind the diaphragm on the anteroposterior projection. CONCLUSIONS:For a rat model of gastric acid aspiration, DEI is capable of distinguishing between a healthy and an injured lung and more clearly than radiography reveals the full extent of the lung and the lung damage.
journal_name
Acad Radioljournal_title
Academic radiologyauthors
Connor DM,Zhong Z,Foda HD,Wiebe S,Parham CA,Dilmanian FA,Cole EB,Pisano EDdoi
10.1016/j.acra.2011.08.005subject
Has Abstractpub_date
2011-12-01 00:00:00pages
1515-21issue
12eissn
1076-6332issn
1878-4046pii
S1076-6332(11)00391-6journal_volume
18pub_type
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