{'fraction_non_alphanumeric': 0.030687124749833223, 'fraction_numerical': 0.040693795863909275, 'mean_word_length': 4.7915057915057915, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The Role of CT and MRI in Suspected Acute Cervical Spine Trauma

Objective To evaluate the accuracy of computed tomography (CT) in evaluation of patients with acute cervical spinal injury. Design Retrospective case series. Setting Three major public emergency departments in the southern hemisphere. Methods We performed a retrospective review of patients with neck injury aged at least 16, with CT cervical spine examinations performed for blunt trauma over a 6 month period (1 January 2011 to 30 June 2011) and magnetic resonance imaging (MRI) cervical spine performed for same indications over two and a half years (12 January 2010 to 22 June 2012). Results Acute cervical spine trauma was present on CT in 35 of 783 patients (4.5%) and on MRI in 98 of 206 patients (48%). Eleven of the 35 patients (31%) with CT confirmed trauma did not meet the Hanson criteria; the majority were at least 60 years of age and none had unstable injuries. CT is 100% sensitive in excluding an unstable injury if there is no soft tissue abnormality or fracture (with MRI as gold standard). An abnormal CT (including subtle paravertebral fat stranding) is often non-specific and often cannot reliably confirm an unstable ligamentous injury. Close attention to soft tissue axial and sagittal soft tissue CT reconstructions is important, as abnormalities can be subtle. Conclusions An unstable injury can often be excluded if CT is completely normal, without the need for MRI. (Hong Kong j.emerg.med. 2014;21:368-372)