PrepTutorEJDIC
- 少し頭が変な / 酔っぱらった
English Journal
- In-line FINCH super resolution digital holographic fluorescence microscopy using a high efficiency transmission liquid crystal GRIN lens.
- Brooker G, Siegel N, Rosen J, Hashimoto N, Kurihara M, Tanabe A.AbstractWe report a new optical arrangement that creates high-efficiency, high-quality Fresnel incoherent correlation holography (FINCH) holograms using polarization sensitive transmission liquid crystal gradient index (TLCGRIN) diffractive lenses. In contrast, current universal practice in the field employs a reflective spatial light modulator (SLM) to separate sample and reference beams. Polarization sensitive TLCGRIN lenses enable a straight optical path, have >90% transmission efficiency, are not pixilated, and are free of many limitations of reflective SLM devices. For each sample point, two spherical beams created by a glass lens in combination with a polarization sensitive TLCGRIN lens interfere and create a hologram and resultant super resolution image.
- Optics letters.Opt Lett.2013 Dec 15;38(24):5264-7. doi: 10.1364/OL.38.005264.
- We report a new optical arrangement that creates high-efficiency, high-quality Fresnel incoherent correlation holography (FINCH) holograms using polarization sensitive transmission liquid crystal gradient index (TLCGRIN) diffractive lenses. In contrast, current universal practice in the field employ
- PMID 24322233
- Comparison of pure and hybrid iterative reconstruction techniques with conventional filtered back projection: image quality assessment in the cervicothoracic region.
- Katsura M, Sato J, Akahane M, Matsuda I, Ishida M, Yasaka K, Kunimatsu A, Ohtomo K.Author information Department of Radiology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan. mkatsura-tky@umin.ac.jpAbstractOBJECTIVES: To evaluate the impact on image quality of three different image reconstruction techniques in the cervicothoracic region: model-based iterative reconstruction (MBIR), adaptive statistical iterative reconstruction (ASIR), and filtered back projection (FBP).
- European journal of radiology.Eur J Radiol.2013 Feb;82(2):356-60. doi: 10.1016/j.ejrad.2012.11.004. Epub 2012 Nov 27.
- OBJECTIVES: To evaluate the impact on image quality of three different image reconstruction techniques in the cervicothoracic region: model-based iterative reconstruction (MBIR), adaptive statistical iterative reconstruction (ASIR), and filtered back projection (FBP).METHODS: Forty-four patients und
- PMID 23199752
- Investigation of the limitations of the highly pixilated CdZnTe detector for PET applications.
- Komarov S, Yin Y, Wu H, Wen J, Krawczynski H, Meng LJ, Tai YC.Author information Department of Radiology, Washington University, St. Louis, MO 63110, USA. komarovs@mir.wustl.eduAbstractWe are investigating the feasibility of a high resolution positron emission tomography (PET) insert device based on the CdZnTe detector with 350 µm anode pixel pitch to be integrated into a conventional animal PET scanner to improve its image resolution. In this paper, we have used a simplified version of the multi pixel CdZnTe planar detector, 5 mm thick with 9 anode pixels only. This simplified 9 anode pixel structure makes it possible to carry out experiments without a complete application-specific integrated circuits readout system that is still under development. Special attention was paid to the double pixel (or charge sharing) detections. The following characteristics were obtained in experiment: energy resolution full-width-at-half-maximum (FWHM) is 7% for single pixel and 9% for double pixel photoelectric detections of 511 keV gammas; timing resolution (FWHM) from the anode signals is 30 ns for single pixel and 35 ns for double pixel detections (for photoelectric interactions only the corresponding values are 20 and 25 ns); position resolution is 350 µm in x,y-plane and ∼0.4 mm in depth-of-interaction. The experimental measurements were accompanied by Monte Carlo (MC) simulations to find a limitation imposed by spatial charge distribution. Results from MC simulations suggest the limitation of the intrinsic spatial resolution of the CdZnTe detector for 511 keV photoelectric interactions is 170 µm. The interpixel interpolation cannot recover the resolution beyond the limit mentioned above for photoelectric interactions. However, it is possible to achieve higher spatial resolution using interpolation for Compton scattered events. Energy and timing resolution of the proposed 350 µm anode pixel pitch detector is no better than 0.6% FWHM at 511 keV, and 2 ns FWHM, respectively. These MC results should be used as a guide to understand the performance limits of the pixelated CdZnTe detector due to the underlying detection processes, with the understanding of the inherent limitations of MC methods.
- Physics in medicine and biology.Phys Med Biol.2012 Nov 21;57(22):7355-80. doi: 10.1088/0031-9155/57/22/7355. Epub 2012 Oct 18.
- We are investigating the feasibility of a high resolution positron emission tomography (PET) insert device based on the CdZnTe detector with 350 µm anode pixel pitch to be integrated into a conventional animal PET scanner to improve its image resolution. In this paper, we have used a simplified ver
- PMID 23079763
Japanese Journal
- 複数の形を解に持つ色付き図形パズルの作成支援システム(ポスター展示(エンターテインメント・アニメーション),映像表現フォーラム)
- 山本 陽平,三谷 純,福井 幸男 [他],金森 由博
- 映像情報メディア学会技術報告 36(16), 13-16, 2012-03-09
- 平面多角形で表される複数のピースを並び替えて異なる2通りまたはそれ以上の数の形を作り出すパズルを、シルエットパズルと呼ぶ。このパズルに対して、我々は与えられた問題を解くことに着目することが多い。ここで本研究は、問題を作ることに着目して、複数の形を入力すると、その形を構成するピース群を自動生成するシステムを提案する。入力は、同じ数の正方形をグリッド状で構成した複数の形とする。また、一般的に単色の形を …
- NAID 110009437856
- Development of a High Resolution X-Ray Imaging Crystal Spectrometer for Measurement of Ion-Temperature and Rotation-Velocity Profiles in Fusion Energy Research Plasmas
- HILL K. W.,BITTER M. L.,BROENNIMANN Ch.,EIKENBERRY E. F.,Ince-CUSHMAN A.,LEE S.G.,RICE J.E.,SCOTT S.,BARNSLEY R.
- Plasma and Fusion Research 2, S1067-S1067, 2007
- … Following proof-of-principle tests on the Alcator C-Mod tokamak and the NSTX spherical tokamak, and successful testing of a new silicon, pixilated detector with 1 MHz count rate capability per pixel, an imaging XCS is being designed to measure full profiles of Ti and vφ on C-Mod. …
- NAID 130002058956
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