06/04/2002 By Mark Pownall
The technique of volume rendering of high resolution magnetic resonance scans of the inner ear to form inner ear reconstructions scores over the rival maximum-intensity projection technique on all measures, a comparison has found.
Volume rendering was found to be significantly better in terms of image quality, diagnostic value the assessment of inner ear segmentation and the time taken to read the film. Researchers in neuroradiology and ENT medicine from Humboldt University in Berlin and Harvard Medical School in the United States carried out this prospective comparison, concluding that “volume rendering is the post-processing technique of choice for 3-dimensional inner ear visualization” They looked at the two post-processing techniques in a series of 50 patients (17 women and 33 men) aged between one and 77 years of age. The patients all had clinically suspected inner ear abnormalities and had progressed to a tertiary referral hospital.
Data recorded by magnetic resonance imaging was processed in two ways, by use of volume rendering and by maximum intensity projection.
The resulting films were read blindly by four radiologists who scored the films for image quality and diagnostic value. The radiologists also looked at assessment of inner ear segments, and the time they took to assess each film was recorded with a stopwatch.
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