Abstract Background: A study has been carried out in order to evaluate in vivo the diagnostic performance of near-infrared light transillumination (NIRT) compared to digital radiographic examination (RE) in the detection of class II carious lesions. Methods: A total of 114 patients were included, and 2957 proximal surfaces were considered. Surfaces were imaged by means of NIRT and radiographed with a photostimulable phosphor system. NIRT and radiographic images were observed by two blinded operators. Their diagnoses were compared with those made while visiting the patients, when visual-tactile, radiographic and NIRT data were matched by expert operators to obtain the reference diagnoses. Sensitivity, specificity and inter-observer consistency were calculated. Results: Throughout the visits, 395 caries were detected. When investigating without clinical information and in a blind manner, RE performed significantly better than NIRT regarding sensitivity analysis (0.591 vs. 0.456, p<0.001), and NIRT performed significantly better than RE regarding specificity analysis (0.980 vs 0.933, p<0.001). However, NIRT showed sensitivity similar to RE when only enamel caries were concerned. With regard to the agreement between the two observers, NIRT performed significantly better than RE (0.901 for RE analysis, 0.989 for NIRT analysis, P<0.001). A high probability of false positives for enamel caries (95% from 0.699 to 0.791) was observed in RE. NIRT was very likely to detect and correct the erroneous positive diagnosis of enamel carious lesions obtained using RE (95% CI for probability from 0.938 to 0.979). Conclusions: NIRT should be used in caries diagnosis in combination with radiographic images. In fact, NIRT can help to correct a false positive diagnosis of enamel caries. Furthermore, NIRT could be used to detect caries in patients for whom non-urgent radiographic exposition is contraindicated and to monitor enamel caries in medically treated patients. Finally, thanks to its three-dimensional images, NIRT can aid in detecting small caries when performing minorly invasive restorative procedures.
Keywords: clinical evaluation; near-infrared light transillumination; NIRT; radiographic examination

Abstract The following report describes the possible techniques of CT-guided puncture for direct magnetic resonance (MR) arthrography of the shoulder. CT-guided puncture can be regarded as an alternative technique to fluoroscopic- or ultrasound-guided puncture for MR-arthrography of the shoulder with high efficiency, low dose and extremely low complication rate.
Keywords: glenohumeral joint; CT-guided approach; technique; radiation dose; direct MR-arthrography

Abstract In patients with head and neck malignancy, knowledge of the lymphatic pathways relevant to tumor location is important for treatment preparation, both in radiation therapy and in surgery. The lymphatics of the head and neck area consist of superficial and deep nodes groups, which are connected by numerous small vessels, giving rise to a complex subcutaneous and deep lymphatic network. The deep cervical lymph nodes, mainly placed along the jugulo carotid vessels, have been intensively reviewed in radiology and classified by well-established levels. The more superficial groups, notably the occipital, parotid, mastoid, facial and superficial cervical lymph nodes groups were not well recognized in the radiology literature, probably because of their less frequent involvement in the more predominant pharyngeal and laryngeal mucosal malignancy, and seem to have been forgotten. We present a review of the anatomy of those lymph nodes groups, including their location, afferent and efferent drainage tracts accompanied by cross-sectional imaging CT examples.
Keywords: lymph nodes; head and neck; lymphatic system