906 resultados para Quantities and measurements


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"Partial list of standard tests used in greater Boston": p. 26-30.

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Contains the IDEA amendments of 1997 related to alternate assessment and the Illinois State Board of Education's guidelines regarding the alternate assessment of the educational progress of students with disabilities in Illinois school districts.

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Errata sheet tipped in.

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"November 1982."

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"February 1984."

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Includes bibliographical references (p. 43-44).

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"Selected references" at end of each chapter.

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Columbia University contributions to philosophy and psychology. vol. XXVII, no. 3.

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On cover: Universtiy of Illinois bulletin. vol. XIX, no. 9.

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Also published as thesis, 1922.

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"August 26, 1991."

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We sought to improve the feasibility of strain rate imaging (SRI) during dobutamine stress echocardiography (DSE) in 56 subjects at low risk of coronary disease. The impact of several SRI changes during acquisition were studied, including: (1) changing from fundamental to harmonic imaging; (2) parallel beam-forming; (3) alteration of spatial resolution and (4) narrow sector acquisition. We assessed SR signal quality, a quantitative measure of signal noise and measurements of SRI. Of 1462 segments evaluated, 6% were uninterpretable at rest and 8% at peak stress. Signal quality was optimised by increasing temporal (p = 0.01) and spatial resolution (p<0.0001 vs. baseline imaging) at rest and peak. Increasing spatial resolution also minimised signal noise (p<0.0001). Inter-observer variability of time to peak SR and peak SR were less with high temporal and spatial resolution. SRI quality can be improved with harmonic imaging and higher temporal resolution but optimisation of spatial resolution is critical. (C) 2004 World Federation for Ultrasound in Medicine Biology.