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dc.contributor.authorSyms, RRA
dc.contributor.authorAhmad, MM
dc.contributor.authorYoung, IR
dc.contributor.authorGilderdale, DJ
dc.contributor.authorCollins, DJ
dc.date.accessioned2018-07-26T13:43:11Z
dc.date.issued2006-12
dc.identifier12
dc.identifier.citationJOURNAL OF MICROMECHANICS AND MICROENGINEERING, 2006, 16 pp. 2755 - 2764
dc.identifier.issn0960-1317
dc.identifier.urihttps://repository.icr.ac.uk/handle/internal/2168
dc.identifier.eissn1361-6439
dc.identifier.doi10.1088/0960-1317/16/12/032
dc.description.abstractA process for batch fabrication of low-cost needle-shaped micro-coils for magnetic resonance (MR) spectroscopy is demonstrated. The conductors are embedded inside a cross-section designed to avoid the signal cancellation effects that can occur with completely immersed detectors. Simple models are developed for the sensitivity of an immersed coil and for the electrical performance of coils on silicon substrates. Conductors are fabricated on oxidized Si by electroplating metals inside a deep photoresist mould, and then capped with a thick layer of plastic. Through-wafer deep reactive ion etching is used to define needle shapes. At 63.8 MHz frequency, Q-factors obtained on Si are comparable to those on glass, and resonators based on single-turn coils have Q-factors of approximate to 14. Total immersion H-1 MR imaging and spectroscopy are demonstrated in a 1.5 T magnetic field using tomato fruits. Q-factors are raised at higher frequencies (to > 30 at 255 MHz) using thick polymer isolation, and hybrid integration of additional circuitry is demonstrated.
dc.format.extent2755 - 2764
dc.languageeng
dc.language.isoeng
dc.publisherIOP PUBLISHING LTD
dc.titleMicroengineered needle micro-coils for magnetic resonance spectroscopy
dc.typeJournal Article
rioxxterms.versionofrecord10.1088/0960-1317/16/12/032
rioxxterms.licenseref.startdate2006-12
rioxxterms.typeJournal Article/Review
dc.relation.isPartOfJOURNAL OF MICROMECHANICS AND MICROENGINEERING
pubs.notesaffiliation: Syms, RRA (Reprint Author), Univ London Imperial Coll Sci Technol & Med, EEE Dept, Opt & Semicond Dev Grp, London SW7 2AZ, England. Univ London Imperial Coll Sci Technol & Med, EEE Dept, Opt & Semicond Dev Grp, London SW7 2AZ, England. Inst Canc Res, Canc Res UK Clin Magnet Resonance Res Grp, Sutton SM2 5PT, Surrey, England. keywords-plus: SPIRAL INDUCTORS; PLANAR MICROCOIL; NMR-SPECTROSCOPY; MICROSPECTROSCOPY; SILICON; DESIGN; MEMS; FABRICATION; INVIVO; TUMORS research-areas: Engineering; Science & Technology - Other Topics; Instruments & Instrumentation; Physics web-of-science-categories: Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Instruments & Instrumentation; Physics, Applied author-email: [email protected] funding-acknowledgement: Engineering and Physical Sciences Research Council [GR/S67135/01] number-of-cited-references: 29 times-cited: 7 usage-count-last-180-days: 0 usage-count-since-2013: 6 journal-iso: J. Micromech. Microeng. doc-delivery-number: 111SQ unique-id: ISI:000242475200032 oa: green_published da: 2018-07-26
pubs.notesNot known
pubs.organisational-group/ICR
pubs.organisational-group/ICR/Primary Group
pubs.organisational-group/ICR/Primary Group/ICR Divisions
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging/Magnetic Resonance
pubs.organisational-group/ICR
pubs.organisational-group/ICR/Primary Group
pubs.organisational-group/ICR/Primary Group/ICR Divisions
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Radiotherapy and Imaging/Magnetic Resonance
pubs.volume16
pubs.embargo.termsNot known
icr.researchteamMagnetic Resonanceen_US
dc.contributor.icrauthorCollins, Daviden


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