Coded Tissue Superharmonic Imaging: An Analytical Study
نویسندگان
چکیده
منابع مشابه
Superharmonic numbers
Let τ(n) denote the number of positive divisors of a natural number n > 1 and let σ(n) denote their sum. Then n is superharmonic if σ(n) | nkτ(n) for some positive integer k. We deduce numerous properties of superharmonic numbers and show in particular that the set of all superharmonic numbers is the first nontrivial example that has been given of an infinite set that contains all perfect numbe...
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ژورنال
عنوان ژورنال: Journal of Medical Ultrasound
سال: 2012
ISSN: 0929-6441
DOI: 10.1016/j.jmu.2012.04.001