The widespread use of MRI has revolutionised the diagnostic process for spinal disorders. A typical protocol for spinal MRI includes T1 and T2 weighted sequences in both axial and sagittal planes. While such an imaging protocol is appropriate to detect pathological processes in the vast majority of patients, a number of additional sequences and advanced techniques are emerging. The purpose of the article is to discuss both established techniques that are gaining popularity in the field of spinal imaging and to introduce some of the more novel ‘advanced’ MRI sequences with examples to highlight their potential uses. Cite this article: Bone Joint J 2015;97-B:1683–92

The identification of the extent of neural damage in patients with acute or chronic spinal cord injury is imperative for the accurate prediction of neurological recovery. The changes in signal intensity shown on routine MRI sequences are of limited value for predicting functional outcome. Diffusion tensor imaging (DTI) is a novel radiological imaging technique which has the potential to identify intact nerve fibre tracts, and has been used to image the brain for a variety of conditions. DTI imaging of the spinal cord is currently only a research tool, but preliminary studies have shown that it holds considerable promise in predicting the severity of spinal cord injury. . This paper briefly reviews our current knowledge of this technique

Royal Liverpool University Hospital, Liverpool, UK. To retrospectively review outcomes in patients who underwent vertebroplasty in Liverpool in response to recent level 1 publications claiming vertebroplasty to be no better than sham procedure assessed using 2 criteria. We reviewed cases between 2006 and 2009 looking at 5 criteria for procedure. Visual Analogue Score (VAS). Oswestry disability index scores (ODI). 96 patients identified. 10 patients excluded (inadequate data recorded) (n=86). Operated levels n=134 (thoracic n=61, lumbar n=71, sacral n=2). Presenting symptoms included back pain (86/86) and point tenderness was present in 90% (77/86). Average length of symptoms was 11.50 months with 28% reporting greater than 12 months. 72% recalled definite onset of symptoms with 90% being associated with a low velocity injury. Radiological findings showed an average of 54% height collapse and 91% showing high signal on STIR MRI sequences. Number of levels operated – 3 or more (n=9 VAS 5.3 ODI 10.6); 1 to 2 levels (n= 77 VAS 3.7 ODI 13.9). Average improvement in VAS score was 3.8.and ODI 13.6. 47% (40/86) of patients met all 5 current criteria recommended for operation (VAS 3.7, ODI 14). 53% (46/86) of patients met 2-5 criteria (VAS 3.8, ODI 13.4). There was improvement in pain scores in 91% of patients with an average pre-op VAS 7.8 and post-op VAS 4.0. There was no significant difference in patients meeting all 5 criteria compared to those meeting 2-5 criteria

Vertebral haemangiomas are usually asymptomatic and discovered fortuitously during imaging. A small proportion may develop variable degrees of pain and neurological deficit. We prospectively studied six patients who underwent eight surgical procedures on 11 vertebral bodies. There were 11 balloon kyphoplasties, six lumbar and five thoracic. The mean follow-up was 22.3 months (12 to 36). The indications for operation were pain in four patients, severe back pain with Frankel grade C paraplegia from cord compression caused by soft-tissue extension from a thoracic vertebral haemangioma in one patient, and acute bleeding causing Frankel grade B paraplegia from an asymptomatic vascular haemangioma in one patient. In four patients the exhibited aggressive vascular features, and two showed lipomatous, non-aggressive, characteristics. One patient who underwent a unilateral balloon kyphoplasty developed a recurrence of symptoms from the non-treated side of the vertebral body which was managed by a further similar procedure.

Balloon kyphoplasty was carried out successfully and safely in all patients; four became asymptomatic and two showed considerable improvement. Neurological recovery occurred in all cases but bleeding was greater than normal. To avoid recurrence, complete obliteration of the lesion with bone cement is indicated. For acute bleeding balloon kyphoplasty should be combined with emergency decompressive laminectomy. For intraspinal extension with serious neurological deficit, a combination of balloon kyphoplasty with intralesional alcohol injection is effective.

The optimal timing of percutaneous vertebroplasty as treatment for painful osteoporotic vertebral compression fractures (OVCFs) is still unclear. With the position of vertebroplasty having been challenged by recent placebo-controlled studies, appropriate timing gains importance.

We investigated the relationship between the onset of symptoms – the time from fracture – and the efficacy of vertebroplasty in 115 patients with 216 painful subacute or chronic OVCFs (mean time from fracture 6.0 months (sd 2.9)). These patients were followed prospectively in the first post-operative year to assess the level of back pain and by means of health-related quality of life (HRQoL). We also investigated whether greater time from fracture resulted in a higher risk of complications or worse pre-operative condition, increased vertebral deformity or the development of nonunion of the fracture as demonstrated by the presence of an intravertebral cleft.

It was found that there was an immediate and sustainable improvement in the level of back pain and HRQoL after vertebroplasty, which was independent of the time from fracture. Greater time from fracture was associated with neither worse pre-operative conditions nor increased vertebral deformity, nor with the presence of an intravertebral cleft.

We conclude that vertebroplasty can be safely undertaken at an appropriate moment between two and 12 months following the onset of symptoms of an OVCF.