Centini G et al 8 Fetal Anatomy by 3-4D Ultrasound

Advanced knowledge and experience of ultrasound technique is necessary to perform a correct two-dimensional (2D) or three-and four-dimensional ultrasound scans (3-4D). Three-dimensional scans are now widely used though their indications and limits have not yet been clearly defined. Scientific societies are therefore working on guidelines for 3-4D in order to optimize its diagnostic possibilities. The western world discourages ludic use of ultrasound, and the French Academy of Medicine has outlawed non medical use, especially in obstetrics.1-2 Springing from seven years ’ experience with 3-4D, the following pages are a personal contribution towards the definition of guidelines in this increasingly complex field. The aim is exclusively medical, though the ludic component of the use of 3-4D in obstetrics should always be borne in mind. The approach to a scan conventionally begins with a sca