| Effect of a Prescan Patient-Radiologist Encounter on Functional MR Image Quality. | |
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MedLine Citation:
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PMID: 20705700 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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BACKGROUND AND PURPOSE: A substantial number of clinical fMRI examinations inadequately assess language localization or lateralization, usually due to patient movement and suboptimal participation. We hypothesized that a prescan interview of the patient by the radiologist would reduce the fraction of nondiagnostic scans. MATERIALS AND METHODS: A single noise score for each acquisition was produced from time-series data on the basis of a weighted sum of 22 factors. Scores were recorded as the following quartiles: 0-5 = excellent, 5-10 = adequate, 10-15= marginal, and >15 = unacceptable. This measure was evaluated for 202 consecutive fMRI patients: 96 without and 106 with a physician prescan interview. The data were analyzed to compute the fraction of all nondiagnostic sequences and entire studies and were compared between the 2 groups. Image-noise characteristics included the SDs of linear and angular displacements of the head and the number of time-series outliers caused by focal motion. RESULTS: Of 999 sequences acquired, 539 had a prescan interview. The mean noise score significantly decreased for both individual sequence (from 7.9 to 6.3, P = <.001) and study-based (from 7.7 to 6.2, P = .05) methods. The fraction of sequences or studies scored as unacceptable decreased for sequence-based (from 15.2% to 10.9%, P = .04) and study-based (from 9.4% to 1.9%, P = .02) analyses. SDs of head motion decreased for linear (by 12%-14%, P < .01) and angular displacement (by 38%-48%, P < .001). The number of time-series spikes decreased by 10% (P = .004). CONCLUSIONS: We report that a prescan physician-patient interview modestly but significantly reduces fMRI noise scores. These results support the newly added billable costs of professional intervention before fMRI scans. |
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Authors:
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S Y Mahmoud; M Ahmed; T M Emch; P Masood; D Moon; M D Phillips; P M Ruggieri; A S Smith; T W Stultz; A L Tievsky; S E Jones |
Publication Detail:
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Type: Journal Article Date: 2010-08-12 |
Journal Detail:
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Title: AJNR. American journal of neuroradiology Volume: 32 ISSN: 1936-959X ISO Abbreviation: AJNR Am J Neuroradiol Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-01-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003708 Medline TA: AJNR Am J Neuroradiol Country: United States |
Other Details:
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Languages: eng Pagination: 210-5 Citation Subset: IM |
Affiliation:
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Division of Neuroradiology, Imaging Institute, Cleveland Clinic, Cleveland, Ohio. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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