The structure of the 3rd edition should be a refinement of the model adopted for the 1st and 2nd editions on the basis that no fundamental change in the requirements of its core readership will occur in the next 10 years. The main developments are: New techniques and applications in interventional radiology, Greater use of colour imaging in duplex scanning-colour flow doppler and power doppler, Better image-processing systems in Magnetic Resonance Imaging and New modalities in PET, SPECT and MR Angiography.