Multichannel DC SQUID sensor array for biomagnetic applications

High-transition-temperature superconducting quantum interference devices

“…In the case of axial gradiometers, the separation of one pickup loop and the signal source is generally made rather less than the baseline, so that the instrument effectively detects the magnetic field from the source. Thin-film gradiometers have also been made, measuring either an axial gradient (Hoenig et al, 1991) or more usually planar devices measuring an offdiagonal gradient of the form ‫ץ‬B z /‫ץ‬x (Hä mä lä inen et al, 1993).…”

Repolarization Spatial‐Time Current Abnormalities in Patients with Coronary Heart Disease

“…In Japan, more than 70,000 people have died of CHD, and this number has remained steady for the last decade 2 . Under the circumstances, several types of medical equipment that allow early diagnosis of CHD have been developed 3–18 …”

A hybrid SQUID gradiometer with 3-dimensional thin-film pick-up coils fabricated using an excimer laser

“…For example, an integrated dc-SQUID with a planar pick-up coil to detect dBz/dx or dBz/dy was fabricated on the SQUID substrate [5], and a coaxial-type coil in which a two-dimensional coilpatterned foil was rolled around a columnar substrate to detect dBddz. [4] were reported. There are no reports, however, of attempts to make a thin-film coaxial pick-up coil patterned directly on a three-dimensional substrate.…”

“…EVERAL multichannel superconducting quantum inter-S ference device (SQUID) systems for biomagnetic measurements have been developed [ 11- [4]. In these systems, many characteristics such as coil balance, sensitivity, ease of assembly, and reproduction are required.…”