BACKGROUND Diffusion tensor imaging (DTI) has been shown to be sensitive in detecting white matter differences between sexes. Before cross-sex hormone treatment female to male transsexuals (FtM) differ from females but not from males in several brain fibers. The purpose of this paper is to investigate whether white matter patterns in male to female (MtF) transsexuals before commencing cross-sex...

PURPOSE The authors describe a new technique to determine the system presampled modulation transfer function (MTF) in digital radiography using only the detector noise response. METHODS A cascaded-linear systems analysis was used to develop an exact relationship between the two-dimensional noise power spectrum (NPS) and the presampled MTF for a generalized detector system. This relationship w...

Mammalian metallothionein (MT) genes are transcriptionally activated by the essential metal zinc as well as by environmental stresses, including toxic metal overload and redox fluctuations. In addition to playing a key role in zinc homeostasis, MT proteins can protect against metaland oxidant-induced cellular damage, and may participate in other fundamental physiologic and pathologic processes ...

Background. To evaluate the optical quality and related factors in patients with ocular hypertension (OHT). Methods. This was a prospective case-control study. A total of 12 eyes with OHT and 20 control eyes underwent testing with Optical Quality Analysis System II (OQAS II) to evaluate the modulation transfer function cut off frequency (MTF cutoff), the Strehl 2D ratio (SR), objective scatter ...

ii Acknowledgements I would firstly like to thank Dr. Michael Marr for giving me the opportunity to work on this project, and for helping me be successful by being a constant source of guidance and knowledge along the way. I would also like to thank Tymon, for their help and feedback at lab meetings. And I would like to thank Dr. Nelson Lau and his lab group, for providing their own advice and ...

OBJECTIVE To investigate the expression of monocyte tissue factor (MTF) and adhesion molecules in patients with chronic renal failure (CRF) and to look for any correlation with thrombin generation and Lp(a) lipoprotein. DESIGN A study of MTF expression and adhesion molecules, prothrombin fragments 1+2 (PTf1+2), an index of thrombin generation, and lipoproteins in patients with CRF and in norm...

For the optimization of the image quality of radiographs, the effect of the blur due to the scattered x rays on the image signal of radiographs has been ignored. The purpose of this study is to investigate the effect of the scattered x rays on the object sharpness of radiographs for tube voltages of 50 to 100 kV. For the purpose, using a phantom of the polymethyl methacrylate (PMMA) with an alu...

Mode Cinefluorographic Acquisition adalah mode pencitraan pada pesawat fluoroskopi C-Arm yang menggunakan tegangan tinggi. Penggunaan tinggi ini memberikan peningkatan dosis pasien sehingga perlu diperhatikan besar dan filter digunakan. Penelitian bertujuan untuk mengetahui pengaruh penambahan Al + Cu terhadap arus waktu keluaran phantom PMMA ( Polymethyl methacrylate ) dengan ketebalan 14 cm 2...

Introduction The change in shape of a wavefront passing through or being reflected from an optical system, compared to the incident wavefront is an indication of the quality of the optical components. A quality indicator is the Modulation Transfer Function (MTF) of the image. There are two common methods of measuring MTF in optical components in systems: Fourier transform of measured linespread...