Vergleich von konventioneller wirbelsäulenganzaufnahme und fluoroskopischer scan-methode bei jungen patienten mit idiopathischer skoliose

Translated title of the contribution: Comparison of conventional full spine radiographs and fluoroscopic scanning method in young patients with idiopathic scoliosis

Juergen Schaefer*, T. Kluba, T. Niemeyer, T. Hahnfeldt, R. Vonthein, R. Kottke, K. F. Kamm, C. Claussen

*Corresponding author for this work
5 Citations (Scopus)

Abstract

Purpose: Evaluation of low-dose full spine radiographs using fluoroscopic images for the assessment of the Cobb angle measurement in patients with scoliosis. Material and Methods: Twenty-one consecutive patients (aged 10-27 years, mean age 14 years) with a conventional full spine examination (film speed class 800) underwent a follow-up exam using digital pulsed fluoroscopy (Multi Diagnost 4, Philips Medical Systems, Eindhoven, The Netherlands). The mean follow-up was 9 months. During a synchronized scan with a C-arm speed of 4 cm/sec fluoroscopic images were stored with a pulsed frequency of 3 images per second. The single images were merged and reconstructed to one image with the software Easy Spine (Philips medical Systems, Eindhoven, The Netherlands). The corresponding dose-area product values (DAP) of both methods were compared. Three independent observers assessed Cobb angles and image quality for each technique. Results: The mean DAP values for conventional imaging was 94.9 cGy × cm2 and for fluoroscopy 7.8 cGy × cm2, respectively. A significant dose reduction of 91.8% (CI 91% to 95%) was calculated. The average absolute angle difference between the observers was found to be 2.7° for conventional imaging and 2.4° for the fluoroscopic method. Interobserver standard deviation of 2.9° was lower than the 5.3° for conventional images. Image quality was better in the conventional images. Conclusion: Using the scanning method, we could achieve a mean reduction of the radiation dose of 92%, while the accuracy of the Cobb angle measurements was comparable for both techniques despite of reduced image quality of digital fluoroscopy.

Translated title of the contributionComparison of conventional full spine radiographs and fluoroscopic scanning method in young patients with idiopathic scoliosis
Original languageGerman
JournalRoFo Fortschritte auf dem Gebiet der Rontgenstrahlen und der Bildgebenden Verfahren
Volume177
Issue number8
Pages (from-to)1110-1115
Number of pages6
ISSN1438-9029
DOIs
Publication statusPublished - 08.2005

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