Abstract: Contour information is extracted from nuclear medicine projection data on a subject not subjected to a scattering correction and an absorption correction by performing a pixel value binarization processing based on a threshold scheme. If necessary, an interpolation processing is performed before reconstructing an image through an image reconstruction processing. Based on the reconstructed image, a second binarization processing is performed to generate a contour image.

Abstract: A measuring image acquisition means 2 acquires a 3-D measuring image in which a phantom filled with the radioactive material into a necessary part is measured with a SPECT system. A measuring image Fourier transform means 4 operates the 3-D measuring image with the 3-D Fourier transform. An actual image acquisition means 6 acquires a 3-D actual image of the part of the phantom which is filled with the radioactive material. An actual image Fourier transform means 8 operates a 3-D actual image with the 3-D Fourier transform. An error image calculation means 10 divides each Fourier transform value of the 3-D Fourier transform measuring image by each Fourier transform value of the corresponding 3-D Fourier transform actual image and acquires a 3-D Fourier transform error image. A point spread function calculation means 12 operates the 3-D Fourier transform error image with the inverse Fourier transform and determines the point spread function image by calculation.

Abstract: Contour information is extracted from nuclear medicine projection data on a subject not subjected to a scattering correction and an absorption correction by performing a pixel value binarization processing based on a threshold scheme. If necessary, an interpolation processing is performed before reconstructing an image through an image reconstruction processing. Based on the reconstructed image, a second binarization processing is performed to generate a contour image.

Abstract: A measuring image acquisition means 2 acquires a 3-D measuring image in which a phantom filled with the radioactive material into a necessary part is measured with a SPECT system. A measuring image Fourier transform means 4 operates the 3-D measuring image with the 3-D Fourier transform. An actual image acquisition means 6 acquires a 3-D actual image of the part of the phantom which is filled with the radioactive material. An actual image Fourier transform means 8 operates a 3-D actual image with the 3-D Fourier transform. An error image calculation means 10 divides each Fourier transform value of the 3-D Fourier transform measuring image by each Fourier transform value of the corresponding 3-D Fourier transform actual image and acquires a 3-D Fourier transform error image. A point spread function calculation means 12 operates the 3-D Fourier transform error image with the inverse Fourier transform and determines the point spread function image by calculation.

Abstract: A head model according to one example of an embodiment is a head model that may be provided for use in the calibration for a brain-imaging device, where a part corresponding to the skull and a part corresponding to at least one specific region of the brain are each formed by a continuous cavity with no cuts other than an opening for liquid injection.

Abstract: A particle beam generator has a vacuum chamber, a magnet which generates a constant magnetic field in the vacuum chamber, acceleration electrodes which generates a magnetic field in a direction perpendicular to the direction of the magnetic field generated by the magnet in the vacuum chamber, a take-out electrode which takes out charged particles accelerated in the vacuum chamber; and a target cell provided at a position at which the charged particles taken out by the taken-out electrode strikes. At least a part of surfaces exposed to the charged particles of the vacuum chamber, the acceleration electrodes, the take-out electrode and/or the target cell is made of a material including an element having atomic number larger than copper.

Abstract: The invention provides a tomograph, and a tomography method, that is capable of providing reconstructed images of high resolution without truncation for large subjects such as a human body. The tomography 10 consists of first detecting unit 18 that is equipped with multiple radiation detectors, which are arranged in such a way that the view field centers of pinhole collimeters they own approximately match with each other, and is capable of moving around a subject 12 along first orbit C1, and a second detecting unit 22 that is equipped with a plurality of radiation detectors and is capable of moving around the subject 12 along a second orbit C2 that is placed further away from the subject 12 than the first orbit C1, and reconstructs images using image data obtained by the first detector 18 and the second detecting unit 22.

Abstract: A particle beam generator has a vacuum chamber, a magnet which generates a constant magnetic field in the vacuum chamber, acceleration electrodes which generates a magnetic field in a direction perpendicular to the direction of the magnetic field generated by the magnet in the vacuum chamber, a take-out electrode which takes out charged particles accelerated in the vacuum chamber; and a target cell provided at a position at which the charged particles taken out by the taken-out electrode strikes. At least a part of surfaces exposed to the charged particles of the vacuum chamber, the acceleration electrodes, the take-out electrode and/or the target cell is made of a material including an element having atomic number larger than copper.

Abstract: As the gas to be irradiated, a nitrogen gas comprising carbon monoxide is irradiated with a deuteron beam, and [15O]CO produced by nuclear reaction is recovered. Since a heating process is not required, [15O]CO can be easily supplied in a short time. Furthermore, the present invention provides a method for producing [15O]CO2 by contacting [15O]CO with oxidizing catalysts. [15O]CO2 can be produced at room temperature by using oxidizing catalysts.

Abstract: As the gas to be irradiated, a nitrogen gas comprising carbon monoxide is irradiated with a deuteron beam, and [15O]CO produced by nuclear reaction is recovered. Since a heating process is not required, [15O]CO can be easily supplied in a short time. Furthermore, the present invention provides a method for producing [15O]CO2 by contacting [15O]CO with oxidizing catalysts. [15O]CO2 can be produced at room temperature by using oxidizing catalysts.