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Improved and isotropic resolution in tomographic diffractive microscopy combining sample and illumination rotation

100%
Vertu S., Flügge J., Delaunay J.-J., Haeberlé O.
Open Physics
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2011
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vol. 9
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issue 4
969-974
EN
Tomographic Diffractive Microscopy is a technique, which permits to image transparent living specimens in three dimensions without staining. It is commonly implemented in two configurations, by either rotating the sample illumination keeping the specimen fixed, or by rotating the sample using a fixed illumination. Under the first-order Born approximation, the volume of the frequency domain that can be mapped with the rotating illumination method has the shape of a “doughnut”, which exhibits a so-called “missing cone” of non-captured frequencies, responsible for the strong resolution anisotropy characteristic of transmission microscopes. When rotating the sample, the resolution is almost isotropic, but the set of captured frequencies still exhibits a missing part, the shape of which resembles that of an apple core. Furthermore, its maximal extension is reduced compared to tomography with rotating illumination. We propose various configurations for tomographic diffractive microscopy, which combine both approaches, and aim at obtaining a high and isotropic resolution. We illustrate with simulations the expected imaging performances of these configurations.
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A new way of presenting diagnostic imaging studies in surgical planning

88%
Alzubedi A., Kusz M., Kuczyńska M., Białek W., Bicki J., Rudzki S.
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EN
Technological advancement, availability and common use of diagnostic imaging slowly but consistently leads to a change in its nature from being additional studies to becoming the basis for diagnostic process and treatment planning especially in complex cases that require surgical treatment. CT angiography study presentation using the illusion called “Pepper’s Ghost” in comparison to a three-dimensional printout and regular CT scan has been made to point out the relevance of research and implementation of new technologies in the diagnosis and surgical planning. Our image, despite being far from ideal and being just an illusion of a hologram, was more appealing and detailed to surgeons in comparison to a printed 3D model and standard CT angiography displayed with Osirix software. In order to change the existing methods of presenting imaging studies, it is advisable to use latest technologies, and among those currently available, ones based on virtual or mixed reality deserve special attention.
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Providing Surround Sound with Loudspeakers: A Synopsis of Current Methods

75%
Blauert J., Rabenstein R.
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