Author: Chuck Connor
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
Book Description
Low Frequency Magnetic Resonance with a Dc SQUID
Author: Chuck Connor
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 290
Book Description
High-Tc SQUIDs for Biomedical Applications: Immunoassays, Magnetoencephalography, and Ultra-Low Field Magnetic Resonance Imaging
Author: Fredrik Öisjöen
Publisher: Springer Science & Business Media
ISBN: 3642313566
Category : Technology & Engineering
Languages : en
Pages : 111
Book Description
This thesis describes the challenging task of developing high critical temperature superconducting quantum interference devices (high-Tc SQUIDs) and using them as sensors for biomedical applications, including magnetic immunoassays, magnetoencephalography and magnetic resonance imaging (MRI). The first part of this work discusses the development of fast magnetic immunoassays, which can be used to improve the sensitivity, or to create new, unique point-of-care diagnostics systems. The second part shows that high-Tc SQUIDs might make magnetoencephalography more available, thus opening the field of high-Tc SQUID-based magnetoencephalography for recording brain functions. This technique can be combined with ultra-low field MRI which is discussed in the last part. This combination may provide a new unique tool for studies of brain functions. This work does not simply improve on existing technology but opens possibilities for novel advanced medical devices and techniques.
Publisher: Springer Science & Business Media
ISBN: 3642313566
Category : Technology & Engineering
Languages : en
Pages : 111
Book Description
This thesis describes the challenging task of developing high critical temperature superconducting quantum interference devices (high-Tc SQUIDs) and using them as sensors for biomedical applications, including magnetic immunoassays, magnetoencephalography and magnetic resonance imaging (MRI). The first part of this work discusses the development of fast magnetic immunoassays, which can be used to improve the sensitivity, or to create new, unique point-of-care diagnostics systems. The second part shows that high-Tc SQUIDs might make magnetoencephalography more available, thus opening the field of high-Tc SQUID-based magnetoencephalography for recording brain functions. This technique can be combined with ultra-low field MRI which is discussed in the last part. This combination may provide a new unique tool for studies of brain functions. This work does not simply improve on existing technology but opens possibilities for novel advanced medical devices and techniques.
Low-frequency Nuclear Quadrupole Resonance with Dc SQUID
Author: Jih-Wen Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 328
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 328
Book Description
מלחים כגורם בבלית חלוקים בפרופילי קרקע רג במדבר
Author: רבכא אמת
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Dc SQUID Detection of New Magnetic Resonance Phenomena
Author: Tycho Sleator
Publisher:
ISBN:
Category :
Languages : en
Pages : 264
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 264
Book Description
Nuclear Magnetic Resonance Experiments with Dc SQUID Amplifiers
Author: Michael Benedict Heaney
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
Book Description
Application of a Dc SQUID to Rf Amplification
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Superconducting QUantum Interference Devices (SQUIDs) have been used for more than a decade for the detection of magnetic resonance. Until recently, these devices had mostly been confined to operation in the audiofrequency range, so that experiments have been restricted to measurements of resonance at low frequencies, or of changes in the static susceptibility of a sample induced by rf irradiation at the resonant frequency. However, the recent extension of the operating range of low noise dc SQUIDs to radiofrequencies (rf) allows one to detect magnetic resonance directly at frequencies up to several hundred megahertz. In this paper, we begin by summarizing the properties of dc SQUIDs as tuned rf amplifers. We then describe first, the development of a SQUID system for the detection of pulsed nuclear quadrupole resonance (NQR) at about 30 MHz and second, a novel technique for observing magnetic resonances in the absence of any externally applied rf fields.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Superconducting QUantum Interference Devices (SQUIDs) have been used for more than a decade for the detection of magnetic resonance. Until recently, these devices had mostly been confined to operation in the audiofrequency range, so that experiments have been restricted to measurements of resonance at low frequencies, or of changes in the static susceptibility of a sample induced by rf irradiation at the resonant frequency. However, the recent extension of the operating range of low noise dc SQUIDs to radiofrequencies (rf) allows one to detect magnetic resonance directly at frequencies up to several hundred megahertz. In this paper, we begin by summarizing the properties of dc SQUIDs as tuned rf amplifers. We then describe first, the development of a SQUID system for the detection of pulsed nuclear quadrupole resonance (NQR) at about 30 MHz and second, a novel technique for observing magnetic resonances in the absence of any externally applied rf fields.
Low-frequency NMR and NQR with a Dc SQUID Amplifier
Author: Nong-Qiang Fan
Publisher:
ISBN:
Category :
Languages : en
Pages : 214
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 214
Book Description
Low-frequency Nuclear Quadrupole Resonance with a Dc SQUID.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 149
Book Description
Conventional pure nuclear quadrupole resonance (NQR) is a technique well suited for the study of very large quadrupolar interactions. Numerous nuclear magnetic resonance (NMR) techniques have been developed for the study of smaller quadrupolar interactions. However, there are many nuclei which have quadrupolar interactions of intermediate strength. Quadrupolar interactions in this region have traditionally been difficult or unfeasible to detect. This work describes the development and application of a SQUID NQR technique which is capable of measuring intermediate strength quadrupolar interactions, in the range of a few hundred kilohertz to several megahertz. In this technique, a dc SQUID (Superconducting QUantum Interference Device) is used to monitor the longitudinal sample magnetization, as opposed to the transverse magnetization, as a rf field is swept in frequency. This allows the detection of low-frequency nuclear quadrupole resonances over a very wide frequency range with high sensitivity. The theory of this NQR technique is discussed and a description of the dc SQUID system is given. In the following chapters, the spectrometer is discussed along with its application to the study of samples containing half-odd-integer spin quadrupolar nuclei, in particular boron-11 and aluminum-27. The feasibility of applying this NQR technique in the study of samples containing integer spin nuclei is discussed in the last chapter. 140 refs., 46 figs., 6 tabs.
Publisher:
ISBN:
Category :
Languages : en
Pages : 149
Book Description
Conventional pure nuclear quadrupole resonance (NQR) is a technique well suited for the study of very large quadrupolar interactions. Numerous nuclear magnetic resonance (NMR) techniques have been developed for the study of smaller quadrupolar interactions. However, there are many nuclei which have quadrupolar interactions of intermediate strength. Quadrupolar interactions in this region have traditionally been difficult or unfeasible to detect. This work describes the development and application of a SQUID NQR technique which is capable of measuring intermediate strength quadrupolar interactions, in the range of a few hundred kilohertz to several megahertz. In this technique, a dc SQUID (Superconducting QUantum Interference Device) is used to monitor the longitudinal sample magnetization, as opposed to the transverse magnetization, as a rf field is swept in frequency. This allows the detection of low-frequency nuclear quadrupole resonances over a very wide frequency range with high sensitivity. The theory of this NQR technique is discussed and a description of the dc SQUID system is given. In the following chapters, the spectrometer is discussed along with its application to the study of samples containing half-odd-integer spin quadrupolar nuclei, in particular boron-11 and aluminum-27. The feasibility of applying this NQR technique in the study of samples containing integer spin nuclei is discussed in the last chapter. 140 refs., 46 figs., 6 tabs.
SQUID-detected NMR and MRI in Microtesla Magnetic Fields
Author: Robert Francis McDermott
Publisher:
ISBN:
Category :
Languages : en
Pages : 310
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 310
Book Description