Written in English
Theses (M.Sc.) -University of Surrey,1995.
|Contributions||University of Surrey. Department of Physics.|
PURPOSE: To evaluate how anode-filter combinations influence image quality in and mean glandular dose to breasts of different thicknesses and compositions. MATERIALS AND METHODS: Mammograms were obtained with a molybdenum (Mo) anode and a Mo filter at 26 kVp, a Mo anode and a rhodium (Rh) filter at 27 kVp, or a tungsten (W) anode and a Rh Cited by: The two digital mammography systems currently available from Lorad-Hologic were used throughout this study. The original system consists of an X-ray tube with Mo anode material with Mo and Rh filter materials (30 μm and 25 μm thick, respectively) and an aSe direct conversion flat panel by: Dose and image quality have been evaluated for two types of digital mammography system which have X-ray tubes with tungsten anodes, the Siemens Novation and the Hologic Selenia. For each system, Effect of Using Tungsten-Anode X-Ray Tubes on Dose and Image Quality in Full-Field Digital Mammography | SpringerLinkCited by: 4. the peripheral x-ray beam intensity. Shaped ﬁlters were already investigated for clinical CT systems concerning their effect on dose, image quality (Mail et al ) and scatter (Bootsma et al ). The reverse method to evaluate the attenuation proﬁle of an Cited by:
The Senographe D system consists of an x-ray tube with Mo anode material, combined with Mo and Rh filter materials, and also with Rh anode combined with Rh filter. This mammography equipment includes an integrated 19 cm×23 cm flat panel detector, consisting of a cesium iodide [CsI(Tl)] indirect detector coupled with an a-Si TFT by: 2. Purpose:Image quality and breast dose for an amorphous selenium detectordigital mammographysystem with a tungsten (W) anode x‐ray tube and rhodium (Rh) and silver(Ag) filters were compared to an. Williams 5 studied the impact of the selection of exposure factors on image quality and dose for a range of breast thicknesses and tissue types. Dance et al., 6 in their Monte Carlo study, concluded that for compressed breast thicknesses of 4 cm–6 cm, W/Rh is recommended as a more suitable target-filter Author: K. Alkhalifah, A. Brindabhan, R. Alsaeed. X-ray Tube Anode: Whereas most x-ray tubes use tungsten as the anode material, mammography equipment uses molybdenum anodes or in some designs, a dual material anode with an additional rhodium track. These materials are used because they produce a characteristic radiation spectrum that is close to optimum for breast imaging as described later.
Effect of filter on average glandular dose and image quality in digital mammography C Songsaeng1, A Krisanachinda1 and K Theerakul2. 1. Department of Radiology, Faculty of Medicine, Chulalongkorn. In digital mammography it is advisable to use the anode/filter combination of W/Rh as it provides higher energy X radiation than the anode/filter combinations of Mo/Mo and Mo/Rh as the quality parameters of the digital image are less sensitive to changes in energy of X radiation in comparison with an analogue image. Abstract. This paper presents the optimized target – filter combinations to meet with the high image quality and the lowest possible average glandular dose in digital mammography based on amorphous selenium (a-Se) detector also provides recommendations for target-filter combinations in digital mammography for different breast by: 6. On the base of exposure parameters, an average glandular dose for each of female patients was estimated. The images obtained by using AEC system had the acceptable threshold contrast visibility irrespective of the applied anode/filter combination.