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Radiographic examination during pregnancy and pelvimetry before pregnancy are still required for particular indications. The use of digital radiography (lateral topogram on CT) reduces the radiation dose to the foetus and ovaries by a factor of 10 to 100, as compared with conventional pelvimetry, as described by Guthmann. The accuracy of this method is satisfactory, the technique is simple, it is rapid and is easy for the patient, particularly for pregnant women. As long as pelvimetry is not possible without ionising radiation, we consider pelvimetry with digital radiography, when strictly indicated, to be acceptable. In order to determine the transverse diameter of the pelvis, a single additional CT cut through the narrowest part of the pelvis is suggested.

During the last decade, there has been increasing interest in tomography of temporal bone malformations. More ear malformations are operated upon today, and the indications for operation and for operative technics will depend upon the types of dysplasia present. It is becoming increasingly evident that clinical and audiometric examinations are of limited diagnostic help. X-ray examination of the skull, including special views of the temporal bone, offers only gross information about inner and middle ear abnormalities. Tomography, however, provides much more definitive and clinically useful information. Tomographic examination of ear dysplasias due to thalidomide has shown how polymorphic and extensive ear malformations can be. Since practical devices with plurisectional blurring have been developed, tomography of the skull has made significant progress. The purpose of this paper is to present further diagnostic and surgical experience in a large group of patients and to cite the limits and possible diagno...