Journal ArticleDOI
Coded-aperture imaging system for reconstructing tomograms of human myocardium.
Nagaaki Ohyama,Tomoaki Endo,Toshio Honda,Jumpei Tsujiuchi,Toru Matumoto,Takeshi Iinuma,Kenji Ishimatsu +6 more
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TLDR
To increase the detection efficiency and improve the spatial resolution, a coded-aperture imaging method is applied to nuclear medicine, which consists of nine pinholes arranged in a square grid.Abstract:
To increase the detection efficiency and improve the spatial resolution, a coded-aperture imaging method is applied to nuclear medicine. The aperture consists of nine pinholes arranged in a square grid. Three kinds of coding are sequentially used to record the same number of projections including parallax and overlap. The overlapped images are partially separated, and good tomograms of a ring phantom and a human myocardium are reconstructed using a modified backprojection algorithm with variable damping factor.read more
Citations
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Journal ArticleDOI
Coded aperture imaging in X- and gamma-ray astronomy
TL;DR: Coded aperture imaging in high energy astronomy represents an important technical advance in instrumentation over the full energy range from X-to γ-rays and is playing a unique role in those spectral ranges where other techniques become ineffective or impracticable due to limitations connected to the physics of interactions of photons with matter.
Feasibility study of the non-invasive estimation of the b+ arterial input function for human PET imaging
TL;DR: This work demonstrates that the trade-off between sensitivity and spatial resolution in PET can be improved thanks to coded aperture collimators and statistical reconstruction algorithm; it also provides new tools to implement such improvements.
Book ChapterDOI
X-Ray Coded Source Tomosynthesis
TL;DR: An approximately space-invariant ‘3-D standard response’ is introduced which can be used to characterize any coded source imaging system and is thus capable of comparing the performance of various source point distributions.
References
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Journal Article
A new method of multiplanar emission tomography using a seven pinhole collimator and an Anger scintillation camera.
TL;DR: In 42 patients with angiographically demonstrated coronary-artery disease, studies of myocardial Tl-201 perfusion, under exercise, have shown improved detection sensitivity in comparison with scintigraphy using parallel-hole collimation.
Journal ArticleDOI
Fresnel zone plate imaging of gamma rays; theory
TL;DR: The general theory of coded-aperture imaging is presented, first for an arbitrary code and then for an on-axis zone plate, an off-axis Zone Plate, and a one-dimensional zone plate (or linear chirp).
Journal ArticleDOI
An advanced coded imaging without side lobes
TL;DR: An advanced coded imaging is proposed which makes it possible to clear away the side lobes from reconstructed images by using a pair of coherent codes.
Journal ArticleDOI
X-ray imaging with multiple-pinhole cameras using a posteriori holographic image synthesis.
TL;DR: Extended source Fourier transform holography for single image synthesis of multiple identical images produced by multiple pinhole camera in X ray astronomy was proposed in this paper, where a single image was synthesized from a single pinhole image.
Journal ArticleDOI
Gamma-ray imaging in Fourier space.
Chien Chou,Harrison H. Barrett +1 more
TL;DR: A new coded-aperture configuration for gamma-ray imaging that measures a single Fourier component of the object distribution at a time and does not require a position-sensitive detector.