MR imaging of scaphoid fractures. Fat-saturated T2-weighted and Short tau inversion recovery images.

Authors

  • Louise Meincke
  • Ivanov Radev Dimitar
  • Rie Eriksen
  • Carsten Ammitzbøl Lauridsen

DOI:

https://doi.org/10.7577/radopen.2150

Keywords:

bone bruise, fat saturation, image quality, magnetic resonance imaging, scaphoid, short tau inversion recovery,

Abstract

Objective: Traumatic injuries of os scaphoideum are serious, and might lead to two main grades of consequences (i.e. osteoarthrosis or avascular necrosis), if a fracture remains undiagnosed. Bone bruise may be the only pathological sign of pain which can last for week or month. Articles describe the importance of early MRI and hereby predict bone bruise with the help of fat suppression sequence; however, only a limited selection articles compares various fat suppression techniques. The purpose of this prospective study was to compare the short tau inversion recovery (STIR) and T2 fat saturation (FAT SAT) sequences, sectional directed along the scaphoid bone axis. In relation to background fat intensity suppression, this study sought the sequence that best evaluated posttraumatic bone marrow edema (bone bruise) on scaphoid injury musculoskeletal magnetic resonance imaging (MRI, 1.5 T extremity scanner).

Materials and methods: Two hundred and fifty-one patients with relevant trauma and positive clinical test for scaphoid bone fractures, exceeding no more than 14 days, underwent MRI examinations. A fast STIR and T2 FAT SAT fast spin echo sequence (FSE) were obtained using a comparable parameter setting (scan time ca. 3 minutes). Three experienced readers (one radiographer and two radiologists) carried out the evaluation blinded to each other’s, based on a quantitative assessment of size (area) and image quality (image contrast, IC and contrast-to-noise ratio, CNR). The study period lasted March 2014-April 2015. Sixty patients met the inclusion criteria and were enrolled. This prospective study was ethically approved by the institutional review board.

Results: There were no significant difference between the bone bruise areas (P=0.45, P=0.44 and P=0.83) or CNR (P=0.31, P=0.38 and P=0.17). However, image contrast showed significant difference in favour of T2 FAT SAT in all three readers’ reports (P<0.05, P<0.05 and P<0.05).

Conclusions: The two sequences appear almost identical. An interchangeable usage of the two sequences was found being acceptable for the diagnosis if the protocol is composed appropriately (1.5T). However, the T2 FAT SAT provided a higher image contrast by specific settings (e.g. short TI = 125 ms) compared to STIR.

Author Biographies

Louise Meincke

Metropolian University College. Faculty of Health and Technology, Copenhagen, Denmark

Ivanov Radev Dimitar

Gentofte Hospital. Department of Diagnostic Radiology, Kildegårdsvej 28, 2900 Hellerup, Denmark

Rie Eriksen

Copenhagen University Hospital Rikshospitalet. Department of Diagnostic Radiology, Blegdamsvej 9, Denmark

Carsten Ammitzbøl Lauridsen

Metropolian University College. Faculty of Health and Technology, Copenhagen, Denmark

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Published

2017-01-01

How to Cite

Meincke, L., Dimitar, I. R., Eriksen, R., & Lauridsen, C. A. (2017). MR imaging of scaphoid fractures. Fat-saturated T2-weighted and Short tau inversion recovery images. Radiography Open, 3(1), 11. https://doi.org/10.7577/radopen.2150

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