Publication IV
نویسندگان
چکیده
In this paper, we present a regularization method in the nonstationary inverse problem for diffuse optical tomography (DOT). The regularization is based on a choosing time evolution process such that in a stationary state it has a covariance function which corresponds to a process with similar smoothness properties as the first-order smoothness Tikhonov regularization. The proposed method is computationally more lightweight than the method where the regularization is augmented as a measurement. The method was tested in the case of the inverse problem of DOT. A solid phantom with optical properties similar to tissue was made, incorporating twomoving parts that simulate two different physiological processes: a localized change in absorption and a surrounding rotating two-part shell which simulates slow oscillations in the tissue background physiology. A sequence of measurements of the phantom was made and the reconstruction of the image sequence was computed using this method. It allows the recovery of the full time series of images from relatively slow measurements with one source active at a time. In practice, this allows instruments with a larger dynamic range to be applied to the imaging of functional phenomena using DOT. S Online supplementary data available from stacks.iop.org/IP/27/025009/mmedia (Some figures in this article are in colour only in the electronic version) 0266-5611/11/025009+15$33.00 © 2011 IOP Publishing Ltd Printed in the UK & the USA 1 Inverse Problems 27 (2011) 025009 P Hiltunen et al
منابع مشابه
طبقه بندی، همه گیر شناسی و هم ابتلایی اختلالات اعتیاد 1
Revised only twice in the 28 – year period from 1952 to 1980, the American Psychiatric Association`s Diagnostic and Statistical Manual of Mental Disorders (DSM) has been amended two more times in half as many years, with the publication of DSM – III – R in 1987 and of DSM – IV in 1994. The DSM counterpart in use outside of North America, the International Classification of Diseases (ICD), also ...
متن کاملPublication Ethics: A Case Series with Recommendations According to Committee on Publication Ethics (COPE)
Ethical misconduct is not a new issue in the history of science and literature. However, ethical misconducts in science have grown considerably in the modern era which is due to emphasis on the scientific proliferation in research institutes and gauging scientists according to their publications. In the current case series, several misconducts occurring over the previous years in Mashhad Univer...
متن کاملPublication Ethics: Many Facets, Collaboration Required
Sir, the recent publication on “Publication Ethics” is very interesting (1). The article by Fazly Bazzaz and Sadeghi demonstrated many interesting cases of misconducts. Indeed, the misconducts can be seen in many ways. As mentioned in the present publication, both author and editor can perform publication misconducts. Nevertheless, the problem has many more facets. Sometimes,...
متن کاملتأخیر در انتشار مجلههای علمی: مطالعه نشریات مصوب وزارت علوم، تحقیقات و فناوری ایران
: Publication delay is a negative phenomenon in scientific information dissemination. The current research studies the publication delay of scientific journals accredited by the Ministry of Science, Research & Technology of Iran. It also investigates the association between journals’ characteristics and their publication lag. This study employs the applied research method. All 1156 journals of ...
متن کامل