OPTIMIZATION OF GEOMETRICAL CHARACTERISTICS AND IMAGE INTENSIFIER RESPONSE IN MICROFOCUS RADIOGRAPHIC SYSTEM

Radiogarphic microfocus system with image intensifier is presently app lied as a reliable NDT real-time method for failure detection in the m illimetric and submillimetric range. The major advantage of the x-ray' s microfocus is the magnification up to more than 40 times of the phot on image projected on the image intensifier. At high magnifications ev ery deviation from the optimal setup geometric alignment, any change i n beam's uniformity and deviations from isoplanaric response of the im age intensifier may cause misinterpretations of the image response. At a further step it may lead to erroneous diagnostic conclusions.The ai m of the present paper is to present a method developed for a systemat ic examination and control of the system's response characteristics. T he continuous control will reduce misinterpretations of the generated images. The method identifies the subsystem causing the deviation and improvements may be initiated (C) 1998 Elsevier Science Ltd. All right s reserved.