Between 1996 and 1999, 54 patients with wrist pain had magnetic resonance imaging performed using a 1.5 Tesla scanner without a wrist coil. Wrist arthroscopy was performed using a standard technique. The findings were then compared. Magnetic resonance imaging had a low sensitivity for the detection of triangular fibrocartilage complex injuries (0.44) and scapholunate ligament injuries (0.11) when wrist arthroscopy was used as the standard of reference. We conclude that when a magnetoresonance technique that does not employ a dedicated wrist coil is used, a negative magnetic resonance imaging scan does not exclude these two significant injuries.

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SUMMARY The cerebral scan has a clearly established role as a routine, or screening, investigation procedure in the diagnosis of cerebral tumours. In addition, it often provides significant assistance in special diagnostic problems, sometimes in which neuroradiology has not been helpful. This latter point, we believe, should be adequately weighted in the overall assessment of the role of cerebral scanning.

Summary This preliminary communication describes an attempt to differentiate varying cerebral lesions by means of brain scanning, utilizing the differences between vascular uptake of isotope in a lesion and permeation of an isotope into it or into the surrounding tissue. To do this Tc99m was used to indicate vascularity on the early (5–10 minutes post‐injection) scan and permeation effect on the late (one hour or more post‐injection) scan. In addition, In113m was used as a blood‐pool marker to study vascular effects. Initial experience with these techniques is described.