Hitachi, Ltd.

Hitachi Medical Corporation

Nippon Steel & Sumitomo Metal Corporation

Hitachi Microcomputer Engineering, Ltd.

Sumitomo Metal Industries, Inc.

Hitachi, Ltd. , Hitachi Medical Corporation

Nippon Steel Corporation

Tetsuo Yokoyama

Koichi Sano

Hideaki Koizumi

Akira Maeda

Shimbu Yamagata

Toshihiro Furuya

Makoto Kato

Ryuzaburo Takeda

Koichi Morishita

Shinichi Sato

Koichi Haruna

Hiroyuki Sekiguchi

Kazuhiro Sato

Yoshishige Endo

Juntaro Arima

Takashi Nakashima

Hiroshi Nishimura

Yukiko Ikeda

Hiroyuki Anada

Akira Ogushi

Takuya Hanada

Takashi Kasama

Kaoru Momose

Kenji Yasuda

Hideki Kohno

Yasuhiro Yoshimura

Kazuo Suzuki

Takao Terayama

Takashi Iizumi

Yoshiyuki Miyamoto

Yasuhiko Ozawa

Takanori Aono

Toshinari Sakurai

Shinichi Fukuzono

Kouichi Kuroda

Atsuro Iseda

Takahiro Osuki

Fuminobu Komura

Koichi Homma

Hirotaka Mizuno

Jun'ichi Taguchi

Kiyoko Takeda

Tatsuya Okui

Yutaka Takuma

Shigenobu Yanaka

Masatoshi Toyoda

Tadashi Kawakami

Kazuya Sukegawa

Noboru Higashi

Hideki Koizumi

Hiromi Kashiwabara

Shinji Omori

Kazuhiko Hamatani

Tetsuo Okabe

Mikihiko Oi

Jyuntaro Arima

There is provided a welding material used for welding of SUS310 stainless steel base metal that contains at least one of Nb and V and is excellent in intergranular corrosion resistance, the chemical composition of the welding material consisting, by mass percent, of C: 0.02% or less, Si: 2% or less, Mn: 2% or less, Cr: 26 to 50%, N: 0.15% or less, P: 0.02% or less, S: 0.002% or less, and Ni: a content percentage satisfying [5&#x2264;Ni&#x2264;Cr&#x2212;14], and the balance of Fe and impurities. Also, there is provided a welding joint of an austenitic stainless steel, which consists of the base metal and a weld metal formed by using the welding material.

Welding material and welding joint

Provided is a method for producing a double-wall tube with braided wires at its interface in which the braided wires are interposed between an outer-wall and inner-wall blank tubes and then a drawing process is applied so as for the braided wires to be brought into close contact with the inner surface of the outer-wall tube and the outer surface of the inner-wall tube, the method comprising: polishing the inner surface of the outer-wall blank tube and the outer surface of the inner-wall blank tube so that a surface roughness thereof satisfies Ra&#x3c;1.0 &#x3bc;m, followed by interposing the braided wires between the outer-wall and inner-wall blank tubes; performing a sinking drawing process so that the difference of the outer diameter of the resulting double-wall tube relative to a die bore diameter is 0.1 mm to 0.3 mm; and subsequently performing heat treatment. The double-wall tube produced is suitable as a heat-transfer tube.

Method for producing double-wall tube with braided wires at its interface

After an inner wall tube, made of steel or alloy containing not less than 2% of Cr, whose outer surface thereof is machined and/or ground to a thickness of 0.1 mm or more including the scale layer, is inserted into an outer wall tube, made of ferritic steel containing not less than 2% of Cr, in which an oxide scale layer containing Cr and having a thickness of 10 to 30 &#x3bc;m is formed in the inner surface thereof, cold working at an outside diameter reduction rate of 5 to 30% is performed. Similarly cold worked after an inner wall tube having an oxide scale layer on the outer surface thereof, is inserted into an outer wall tube whose inner surface is machined and ground. A double-walled tube made has a uniform gap and an excellent thermal conductivity, and is suitable as materials for SG tubes of future FBR.

Double-walled tube with interface gap and production method therefor

The high-strength Ni-based alloy tube for nuclear power use consists, by mass percent, of C: 0.04% or less, Si: 0.10 to 0.50%, Mn: 0.05 to 0.50%, Ni: 55 to 70%, Cr: more than 26% and not more than 35%, Al: 0.005 to 0.5%, N: 0.02 to 0.10%, and one or more kinds of Ti: 0.01 to 0.5% and Nb: 0.02 to 1.0%, the balance being Fe and impurities. For this alloy tube, the grain size is as fine as grain size No. 6 or higher in JIS G 0551. It is preferable that the high-strength Ni-based alloy tube be manufactured by the process of preparing a Ni-based alloy stock through a remelting process, hot forging, heating to 1000 to 1160&#xb0; C., hot extruding at a working ratio such that an extrusion ratio is 4 or higher, and performing solution annealing and thermal treatment.

High-strength Ni-based alloy tube for nuclear power use and method for manufacturing the same

Nucleic acid separating vessel, a method of manufacturing the nucleic acid separating vessel, and a method for separating the nucleic acid

Composite particles formed from resin particles and silica particles (amount of silica particles: 0.2 to 10 wt. % on the basis of the resin particles) in an apparatus for formation of composite particles are placed in a PTFE mold and heat treated to weld the resin particles to one another, thereby forming a structural element, which is dipped in an ethyl silicate solution containing monodispersed silica particles, then taken out of the solution and subjected to further heat treatment to form an ultimate structural element, which is sealed in a tip case, whereby a tip can be produced at a low cost and used to separate nucleic acid from a liquid sample for a short time at a high recovery rate without any defects such as breaking, etc.

Chip for use in nucleic acid separation, structural element and process

To efficiently, 3-dimensionally, perspectively project and display the extracting processing procedure of a predetermined region on a 3-dimensional image, the extracting process is executed while observing the displayed image. Further, the process is interrupted as necessary so that the process can progress or be returned. The result of the extraction at the interruption time point is edited on a 2-dimensional image and the result of the edition is immediately reflected onto the 3-dimensional image, so that whether the edition is proper or improper can be decided.

Method for displaying region extracting processing in an image

In a region extraction to be achieved by a concatenated region expansion processing, to improve reliability of extraction results and to reduce loads imposed on the operator, when a region other than an objective region is extracted as a result of the region extraction, a point belonging to the region other than the objective region is specified in a three-dimensional display image to execute deletion of the overflow region.

Method of and apparatus for region extraction in three-dimensional voxel

Disclosed is a method for automatically determining the median line of a selected region of a human body so as to simplify complex imaging required hithero for a magnetic resonance imaging apparatus, and, in the method, an artifact of the imaged selected region of the human body is utilized to automatically determine the median line. For example, two artifacts 1010 and 1020 intersecting each other appear from the superior sagittal sinus as shown in FIG. 1 when the direction of phase encoding is changed. By subtracting one of these artifacts 1010 and 1020 from the other and calculating the absolute value of the result of subtraction, the point 1030 of intersection of the artifacts determines the location of the superior sagittal sinus which is the source of apperance of the artifacts, so that the median line can be automatically determined on the basis of the result of determination of location of the superior sagittal sinus.

Method for determining median line

In order to ensure that region extraction for extracting a specified internal organ can be effected with high reliability, a region expansion method is applied by using a combination of an expansion condition taking the local density change into consideration and an expansion condition taking the global density change into consideration.

Region extracting method and three-dimensional display method

A method for imaging the coronary artery of a living body using nuclear magnetic resonance, wherein a patient is located in a static magneic field and the heart cycle of the patient is detected with the heart dilation period of the patient being determined in accordance with the detected heart cycle. Then, the coronary artery of the patient is portrayed on the nuclear magnetic resonance signal generated by applying high-frequency energy to the patient during the determined heart dilation period.

Coronory artery imaging method and apparatus

A method and apparatus for MRI imaging capable of reducing the time between end of measurement and completion of image reconstruction by performing part of image reconstruction calculation in parallel with measurement of magnetic resonance signals, which particularly performs image reconstruction calculation up to (N-1) dimensions of N-dimensional image reconstruction calculation in parallel with measurement of signals and performs the image reconstruction calculation for the remaining one-dimensional direction after the measurement has been finished. When calculation for the last one dimension is performed, the (N-1)-dimensional images for which image reconstruction has been completed are successively displayed, and the image reconstruction calculation for the remaining one-dimensional direction is carried out not by FFT but by discrete Fourier transform, or such that the order of signal measurement is made in the bit reversed order for the order of phase encoding quantity, and thereby, a further portion of the image reconstruction calculation is carried out in parallel with the signal measurement.

Multi-dimensional magnetic resonance imaging method and apparatus for

In order to eliminate the degradation of NMR image caused by a body motion due to breathing or the like, one of measured image signals is selected as a reference, correlation is calculated between each measured image signal and the reference, and the image signal is modified on the basis of the value of correlation.

Method and apparatus for body motion corrective imaging

A magnetic resonance imaging apparatus selects a partial region of a slice in a subject with a radio frequency magnetic field and generates echo signals only from the partial region. The echo signals are collected from the subject by using an ultra-high speed data acquisition technique. An image of a partial region is reconstructed from the echo signals.

Ultra-fast imaging method and apparatus

Based on the relation that the higher the temperature of a portion to be measured, the lower becomes coherence of a nuclear spin at that portion, the present invention measures indirectly the temperature state of the portion to be measured from the change of intensity of NMR signals by utilizing this relationship. A transverse relaxation time is contained as one of the parameters in the relation between the signal intensity and the temperature; hence this transverse relaxation time is determined in advance for the portion to be measured and utilized in for the equation representing their relationship. This application discloses also an invention for determining a blood perfusion rate of the portion to be measured from the temperature data obtained in the manner described above.

Method and apparatus for measuring temperature of subject

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Tokyo, Japan

Tetsuo Yokoyama