Ultrasound elastography has been widely applied in clinical diagnosis. To produce high-quality elastograms, displacement estimation is important to generate ne displacement map from the original ratio-frequency signals. Traditional displacement estimation methods are based on the local information of signals pair, such as cross-correlation method, phase zero estimation. However, the tissue move...

Summary This work presents variational concepts associated with reduced Trefftz type approaches and discusses the interrelationship between various concepts of the displacement, hybrid and Trefftz methods. The basic concept of the displacement version of the reduced Trefftz method operates on the natural boundary conditions enforced in an integral form whereas the stress version of the reduced ...

Physics under supervision of professor Mats Rudemo. The most recent version of the papers in this thesis can always be obtained from my homepage It is usual to thank a lengthy list of persons in the preface of your thesis. I could certainly make such a list as I know and I have met a lot of wonderful, nice, and helpful persons during my Ph.D. studies. However, I am afraid that I would forget so...

BACKGROUND The present study investigated the long-term outcome of patients with localized high-risk prostate cancer after definitive conformal radiotherapy. PATIENTS AND METHODS Ninety-one consecutive patients with stage T1-T4 prostatic carcinoma were treated from 1996 through 2000. Each patient had at least one of the following risk factors: stage > T2b (UICC 1997; 55 patients), Gleason sco...

Cryosurgery of the prostate presents as an efficient therapy following failed radiation therapy. We report on a 7-year retrospective analysis evaluating the morbidity adn biochemical disease-free survival(bDFS) of this therapy. Between 1993 and 2001, 59 patients who had been previously treated with radiation therapy and had rising serum prostate-specific antigen(PSA) values underwent salvage cr...

It is known that the ratio of Gaussian hypergeometric functions can be represented by means of g -fractions. In this work, the ratio of q -hypergeometric functions are represented by means of g -fractions that lead to certain results on q -starlikeness of the q -hypergeometric functions defined on the open unit disk. Corresponding results for the q -convex case are also obtained.

It is shown that if the displacement field and stress intensity factor are known as functions of crack length for any symmetrical load system acting on a linear elastic body in plane strain, then the stress intensity factor for any other symmetrical load system whatsoever on the same body may be directly determined. The result is closely related to Bueckner's [1] "weight function". through whic...