Optimisation of Image Quality and Dose

摘要: The knowledge of the relationship that links image quality and radiation dose is a prerequisite to any optimisation medical diagnostic radiology, because — according ALARA concept received by patient during radiological examination should be kept “as low as reasonably achievable” (see preface). required for successful reliable diagnosis depends on physical parameters such contrast, resolution noise, constitution patient, viewing conditions (Brandt et al. 1983) also characteristics observer assesses image. In Chap. II.7 Fig. II.7.2) importance coordination these influencing quantities has been pointed out. Furthermore, one take into consideration reducing system noise increasing will not always improve task performance. This observation indicates imaging process might optimised accepting higher (e.g. in paediatrics). following shows how exposure can adapted indication.