Three-dimensional (3D) magnetic resonance (MR) projection imaging was evaluated as a noninvasive alternative to direct cholangiography in 12 patients with malignancy-related obstructive jaundice. The 3D images of the bile ducts were formed by subjecting consecutive coronal MR images obtained with a fast imaging method to a maximum-intensity projection algorithm. Dilatation and obstruction of the biliary system were well documented in all cases, and good correlation between findings at 3D MR cholangiography and percutaneous transhepatic biliary drainage performed 0-21 days later was observed.

This study investigates the occurrence of corrective feedback and uptake in child ESOL classes. Transcripts of 8.1 hours of lessons in 6 ESOL classes in a New Zealand primary school were analysed to explore the relationship between errors, feedback, and uptake. The results revealed that there was a clear preference for recasts and explicit correction, and there was a lack of prompts. The two most frequent feedback types yielded relatively high uptake rates, which was ascribed to the fact that a high percentage of the recasts were corrective (as opposed to supportive) and many cases of explicit correction subsumed multiple, hybrid (input-providing as well as output-prompting) corrective moves. Phonological errors led to a high repair rate regardless of feedback types, and grammatical errors mainly received recasts, most of which were not followed by repairs. Overall, there are differences in the patterns of feedback and uptake between this study and previous studies, which were interpreted with reference to the unique characteristics of this instructional context. This study demonstrates a need for an interactive, situated approach to the study of corrective feedback.

BACKGROUND AND PURPOSE:Recently, Lee et al reported a new grading system for the lumbar spinal foraminal stenosis. They considered the type of stenosis, the amount of fat obliteration, and the presence of nerve root compression. Our aim was to evaluate whether a new MR imaging grading system correlated with symptoms and neurologic signs and could replace the previous grading system.

ObjectiveThe purpose of this study was to present the outcome of the microsurgical foraminotomy via Wiltse paraspinal approach for foraminal or extraforaminal (FEF) stenosis at L5–S1 level. We investigated risk factors associated with poor outcome of microsurgical foraminotomy at L5–S1 level.MethodsWe analyzed 21 patients who underwent the microsurgical foraminotomy for FEF stenosis at L5–S1 level. To investigate risk factors associated with poor outcome, patients were classified into two groups (success and failure in foraminotomy). Clinical outcomes were assessed by the visual analogue scale (VAS) scores of back and leg pain and Oswestry disability index (ODI). Radiographic parameters including existence of spondylolisthesis, existence and degree of coronal wedging, disc height, foramen height, segmental lordotic angle (SLA) on neutral and dynamic view, segmental range of motion, and global lumbar lordotic angle were investigated.ResultsPostoperative VAS score and ODI improved after foraminotomy. However, there were 7 patients (33%) who had persistent or recurrent leg pain. SLA on neutral and extension radiographic films were significantly associated with the failure in foraminotomy (p<0.05). Receiver-operating characteristics curve analysis revealed the optimal cut-off values of SLA on neutral and extension radiographic films for predicting failure in foraminotomy were 17.3° and 24°s, respectively.ConclusionMicrosurgical foraminotomy for FEF stenosis at L5–S1 level can provide good clinical outcomes in selected patients. Poor outcomes were associated with large SLA on preoperative neutral (>17.3°) and extension radiographic films (>24°).