Title :
Performance of reflex transmission imaging (RTI) using a linear array
Author :
Baker, Lucy A S ; Bamber, Jeffrey C.
Author_Institution :
Joint Dept. of Phys., Inst. of Cancer Res., Sutton, UK
Abstract :
RTI is a method of imaging relative attenuation using a single, ideally strongly focused, transducer in pulse echo mode. RTI using a linear (ID) array has not previously been attempted but would have considerable practical advantages. Performance was assessed by imaging attenuating tiles set in a uniform scattering background. The average speckle to noise ratio was 5.6. For an attenuation contrast of -62%, the contrast to noise ratio was 4.4. The width of the 2D RTI edge step function was 2.2 by 2.4 mm ± 0.6 mm. Such a spatial resolution should be adequate to image thermal lesions.. The phantom design provided a useful means of measuring performance and hence optimising scanner:settings for RTI
Keywords :
biomedical ultrasonics; echo; radiation therapy; ultrasonic transducer arrays; RTI; attenuating tiles; attenuation contrast; contrast to noise ratio; edge step function; linear array; metastatic disease; minimally invasive therapies; phantom design; pulse echo mode; reflex transmission imaging; relative attenuation; scanner settings; spatial resolution; speckle to noise ratio; strongly focused transducer; thermal lesions; uniform scattering background; Attenuation; Focusing; Imaging phantoms; Lesions; Scattering; Signal to noise ratio; Spatial resolution; Speckle; Tiles; Transducers;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.992016
