Original contributionInfluences of ultrasonic machine settings, transducer frequency and placement of region of interest on the measurement of integrated backscatter and cyclic variation
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Cited by (14)
Physical Properties of Tissues Relevant to Arterial Ultrasound Imaging and Blood Velocity Measurement
2007, Ultrasound in Medicine and BiologyCitation Excerpt :This parameter originated as a practical index of backscatter strength used with clinical imaging systems (O’Donnell et al. 1979, 1981a, 1981b) and it has mainly been used in in-vivo cardiac studies (Mimbs et al. 1981; Wickline et al. 1986; Milunski et al. 1989; Takiuchi et al. 1998). It has been recognized that IBS is dependent on machine factors, making it difficult to compare IBS measured using different machines (Ota et al. 1997), and that assumed values for attenuation of overlying tissues will affect estimated IBS (Bridal et al. 1998). Measurements in excised arteries have demonstrated higher backscatter in calcified and fibrous plaque compared with normal arteries or fatty plaque (Wickline 1993; Barzali et al. 1987; Bridal et al. 1998; Takiuchi et al. 2000; Waters et al. 2003) and anisotropic behavior with higher IBS in the radial orientation (Nguyen et al. 2002; de Kroon et al. 1991a).
Ultrasonic tissue characterization of the mouse myocardium: Successful in vivo cyclic variation measurements
2004, Journal of the American Society of EchocardiographyDepth variation bias and interaction with gain setting in ultrasonic tissue characterization by integrated backscatter analysis
2003, Journal of the American Society of EchocardiographyCitation Excerpt :Our study also shows that even tough differences in IBS as a result of individual chest attenuation can be partially offset by subtraction of an internal reference (such as pericardium), in this case a significant effect of gain setting occurs. As previously described,12 the effect of gain setting is also a major source of variability in IBS analysis. However, in our study, the effect of gain variation could be almost fully predicted by the equation obtained in the plastic phantom, taking into account the nonlinear behavior of gain as to depth of a given structure.
Cyclic variation of integrated ultrasound backscatter in the left ventricle during the early neonatal period
2000, American Heart JournalCitation Excerpt :The intensity of IBS at any one point is dependent on transmit power, transducer frequency, sample depth, and attenuation by the chest wall. By contrast, the CV of IBS is theoretically independent of these factors.8,12 CV was expressed as the difference between end-diastolic (peak) and end-systolic (nadir) IBS values.
Myocardial tissue characterization in heart failure by real-time integrated backscatter
1999, European Journal of UltrasoundUltrasonic tissue myocardial characterization: Backscatter
1999, Revista Espanola de Cardiologia