Measurement of signal-to-noise and contrast-to-noise in the fBIRN Multicenter Imaging Study.
The ability to analyze and merge data across sites, vendors, and field strengths depends on one's ability to acquire images with the same image quality including image smoothness, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). SNR can be used to compare different magnetic resonance s...
| Publicado en: | Journal of Digital Imaging Vol. 19; no. 2; pp. 140 - 148 |
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| Autores principales: | , |
| Formato: | diagnostic images equations & formulas research Journal Article |
| Publicado: |
Springer Nature
Jun2006
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106169707&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106169707 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08971889 DOQ jtl: Journal of Digital Imaging issn: 08971889 maglogo: N pubinfo: dt: Jun2006 vid: 19 iid: 2 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 106169707 2009257132 10.1007/s10278-006-0264-x NLM16598643 106169707 ppf: 140 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Measurement of signal-to-noise and contrast-to-noise in the fBIRN Multicenter Imaging Study. aug: au: Magnotta VA Friedman L affil: Department of Radiology, University of Iowa, 0453-D JCP, Iowa City, IA 52242, USA. vincent-magnotta@uiowa.edu sug: subj: Brain Mapping Methods Image Processing, Computer Assisted Magnetic Resonance Imaging Standards Signal Processing, Computer Assisted Analysis of Variance Comparative Studies Funding Source Magnetic Resonance Imaging Equipment and Supplies Neuroradiography Human ab: The ability to analyze and merge data across sites, vendors, and field strengths depends on one's ability to acquire images with the same image quality including image smoothness, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). SNR can be used to compare different magnetic resonance scanners as a measure of comparability between the systems. This study looks at the SNR and CNR ratios in structural fast spin-echo T2-weighted scans acquired in five individuals across ten sites that are part of Functional Imaging Research of Schizophrenia Testbed Biomedical Informatics Research Network (fBIRN). Different manufacturers, field strengths, gradient coils, and RF coils were used at these sites. The SNR of gray matter was fairly uniform (41.3-43.3) across scanners at 1.5 T. The higher field scanners produced images with significantly higher SNR values (44.5-108.7 at 3 T and 50.8 at 4 T). Similar results were obtained for CNR measurements between gray/white matter at 1.5 T (9.5-10.2), again increasing at higher fields (10.1-28.9 at 3 T and 10.9 at 4 T). pubtype: Academic Journal doctype: diagnostic images equations & formulas research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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