Impact of CT perfusion imaging on the assessment of peripheral chronic pulmonary thromboembolism: clinical experience in 62 patients.
Eur Radiol
; 26(11): 4011-4020, 2016 Nov.
Article
in En
| MEDLINE
| ID: mdl-26976297
ABSTRACT
PURPOSE:
To evaluate the impact of CT perfusion imaging on the detection of peripheral chronic pulmonary embolisms (CPE). MATERIALS ANDMETHODS:
62 patients underwent a dual-energy chest CT angiographic examination with (a) reconstruction of diagnostic and perfusion images; (b) enabling depiction of vascular features of peripheral CPE on diagnostic images and perfusion defects (20 segments/patient; total 1240 segments examined). The interpretation of diagnostic images was of two types (a) standard (i.e., based on cross-sectional images alone) or (b) detailed (i.e., based on cross-sectional images and MIPs).RESULTS:
The segment-based analysis showed (a) 1179 segments analyzable on both imaging modalities and 61 segments rated as nonanalyzable on perfusion images; (b) the percentage of diseased segments was increased by 7.2 % when perfusion imaging was compared to the detailed reading of diagnostic images, and by 26.6 % when compared to the standard reading of images. At a patient level, the extent of peripheral CPE was higher on perfusion imaging, with a greater impact when compared to the standard reading of diagnostic images (number of patients with a greater number of diseased segments n = 45; 72.6 % of the study population).CONCLUSION:
Perfusion imaging allows recognition of a greater extent of peripheral CPE compared to diagnostic imaging. KEY POINTS ⢠Dual-energy computed tomography generates standard diagnostic imaging and lung perfusion analysis. ⢠Depiction of CPE on central arteries relies on standard diagnostic imaging. ⢠Detection of peripheral CPE is improved by perfusion imaging.Key words
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Database:
MEDLINE
Main subject:
Pulmonary Artery
/
Pulmonary Embolism
/
Computed Tomography Angiography
Type of study:
Diagnostic_studies
/
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limits:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Year:
2016
Type:
Article