We have developed new systems for magnetoencephalography (MEG). The pick up coil is a coaxial type first-order gradiometer with 50-mm base line. magnetic field resolution of the system about 4 fT/Hz/sup 0.5/ or 0.8 (fT/cm)/Hz/sup in white noise region. unique feature gantry-free horizontal dewar, which fabricated through what we call "ship-in-a-bottle approach". Less than 10-liter/day liquid helium consumption 100-liter capacity realized. One merits dewar that small room sufficient...

We have developed a high-resolution scanning superconducting quantum interference device (SQUID) microscope for imaging the magnetic field of geological samples at room temperature. In this paper, we provide details about SQUID system, including magnetically shielded box (MSB), XYZ stage, data acquisition by and initial evaluation system. The background noise in two-layered PC permalloy MSB is approximately 40–50 pT. long-term drift system ≥1 nT, which can be reduced correction each...

A one-stage total repair was successfully accomplished in a Japanese girl, 7 years, 8 months old, who had asplenia syndrome with visceral heterotaxia, isolated levocardia, and complicated cardiovascular anomalies; double-outlet right ventricle d-malposition of the great arteries (anterior aorta, posterior pulmonary trunk), complete form endocardial cushion defect, anomalous venous drainage, stenosis, sinus venosus type atrial septal patent ductus arteriosus, bilateral superior venae cavae,...

An LTS SQUID biomagnetometer system was developed for the non-invasive diagnosis method of spinal cord function orthopedic and neurologic application. The is characterized by a uniquely shaped cryostat. It has vertical cylinder-shaped main body protrusion from its side surface. array vector gradiometers with 5 times 8 matrix-like arrangement 90 mm 140 observation area installed in protrusion. Supine subjects are able to fit their cervixes stably sensor putting them against during...

In this study, a new superconducting quantum interference device (SQUID) biomagnetic measurement system known as magnetospinogram (MSG) is developed. The MSG used for observation of weak magnetic field distribution induced by the neural activity spinal cord over body surface. current source reconstruction observed provides noninvasive functional imaging cord, which enables medical personnel to diagnose diseases more accurately. equipped with uniquely shaped cryostat and sensor array...

Abstract Ferromanganese crusts record long‐term deep‐sea environmental changes. Thus, providing their reliable high‐resolution age models is important. We applied a magnetostratigraphic technique to estimate the growth rate of ferromanganese crust using scanning SQUID (superconducting quantum interference device) microscope (SSM). SSM designed map magnetic field across thin sections with submillimeter resolution. The sample was taken from Takuyo‐Daigo Seamount, northwestern Pacific, and...

Abstract The ionospheric Alfvén resonator (IAR) is found in a dynamic power spectrum of the geomagnetic field variations as spectral resonance structures frequency range 0.1–10 Hz. To date, observations IAR at low latitude have only been made by few studies employing single ground observatory and are not sufficient enough to reveal its general characteristics. We analyze data measured with an induction magnetometer installed Muroto, Japan (24.40° latitude) for period from 28 December 2013 13...

A 75-ch SQUID biomagnetometer system for the measurement of cervical spinal cord evoked magnetic field (SCEF) was developed purpose noninvasive functional diagnosis cord. The sensor array has 25 vector sensors arranged along cylindrical surface to fit shape subject's neck. fields, not only in direction radial body but also tangential direction, are observed area 80 mm times 90 at one time. dewar a unique with main and protrusion from its side surface. is installed protruded part. This design...

To investigate whether the ocular dominance affects laterality in activity of primary visual cortex, we examined relationship between and latency or dipole moment measured by checkerboard-pattern magnetoencephalography 11 right-handed healthy male participants. Participants with left-eye showed a 21.5+/-6.1 nAm stimulation 16.1+/-3.6 right, whereas those right-eye 18.0+/-5.2 21.5+/-2.7 infero-medial quadrant field, respectively. Thus, was higher when dominant eye stimulated, which implies...

We have developed a high-spatial-resolution superconducting quantum interference device (SQUID) microscope for magnetic field imaging of rock samples at room temperature, using hollow-structured cryostat. A directly coupled low-temperature SQUID with 200 μm × pickup loop, which is mounted on sapphire conical rod, separated from temperature by thin window. Precise and repeatable adjustment the vacuum gap between window performed rotating micrometer spindle connected to rod through hollow...

Background. Spontaneous regression of non-Hodgkin's lymphoma, occasionally reported in low grade groups, is a rare phenomenon high groups. Clonal proliferation has not been confirmed the majority cases. In this woman, age 58 years, who had diagnosed as having immunoblastic lymphoma after excision single cervical lymph node, remaining bilateral cervical, inguinal, and axillary adenopathy regressed completely without any cytotoxic treatments 22 days biopsy. At time writing, patient free...

Fibroadenoma is the most common form of benign breast tumor and in women under 30 years age. However, carcinoma arising within a fibroadenoma unusual, with over 100 cases reported literature. Histological diagnosis typically unexpected. A 46-year-old female no family history malignancies was admitted for an elastic hard lump upper-outer quadrant her right breast. At clinic that she visited previously, condition diagnosed by core needle biopsy four specimens showing borderline atypical ductal...

Primary pulmonary neoplasms of the Ewing family tumors (EFT) are extremely rare and usually occur in adolescents or young adults. Only about 40 cases EFT have been reported English literature, no cytological studies documented. In this report, we describe cytopathological findings a primary an elderly patient. A 70-year-old man sought care because progressing cough dyspnea. Chest computed tomography revealed circumscribed mass 6 cm left upper lobe. Fine needle aspiration cytology core biopsy...

We proposed a composite superconducting quantum interference devices (SQUIDs) gradiometer with an axial-type gradiometric pick-up coil and two planar-type coils. Three gradiometers are built into single module in orthogonal position to each other the coils of concentric. Therefore, sensor can detect magnetic fields elicited by action currents living body as quasi three-dimensional vector at specific point. The outward form sensors is identical our conventional SQUID magnetometer. new be...

Accurate capture of the biomagnetic signals from a rat or mouse greatly benefits development new medicine and pathology. In order to improve efficiency accuracy measurement small animals, we developed system specific animal measurement. A superconducting quantum interference device (SQUID) sensor array table for were newly integrated into transportable chassis having dimensions 1.3 m width × 0.7 depth 1.8 height housing all principal components system. The 9ch low-Tc SQUIDs magnetometer...

We characterized a low temperature superconducting quantum interference device (SQUID) magnetometer system developed for high-sensitivity geomagnetic field measurement, and demonstrated the detection of weak signals. The SQUID is comprised three-axis magnetometers housed in glass fiber reinforced plastic cryostat, readout electronics with flux locked loop (FLL), 24-bit data logger global positioning batteries. noise was approximately 0.2 pT √Hz− 1/2 1–50 Hz frequency range. This performance...

Energetic stability and electronic structures of Pt atoms in Pt-Rh nanoparticle is investigated by first-principles calculation. atom energetically prefer surface sites (vertex, edge, (100)) rather than subsurface core site, which attributed to lower energy compared with Rh. Vertex the most favorable site for atom, has lowest coordination numbers. Band center d-state contribution measured from Fermi exhibit negative dependence respect number. This can be positive second-order moment density...

Low field MRI and MEG are based on the ability of SQUID sensors to detect femtotesla magnetic fields. We now developing a low system which can be integrated with for small animals. The fast switching polarizing inherently induces large transient signals in experiments. have optimized our minimize its influence improve SNR signal, by modifying gradiometer FLL (fluxed-locked loop) circuit reducing back electromotive force coil. Our includes five sets gradient coils. Employing “target method”...