Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)

High sensitivity signal detection for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI) is compensated by the increase in the number of scans (Ns) and consequently the scan time. A long scan time would result in fatigue and restlessness in participants, while a short scan...

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Main Authors:	Ahmad Nazlim Yusoff, Khairiah Abdul Hamid, Hamdi Hamzah, Mazlyfarina Mohamad, Siti Zamratol Mai Sarah Mukari, Wan Ahmad Kamil Wan Abdullah
Format:	Article
Language:	English
Published:	Penerbit Universiti Kebangsaan Malaysia 2016
Online Access:	http://journalarticle.ukm.my/10297/ http://journalarticle.ukm.my/10297/ http://journalarticle.ukm.my/10297/1/13%20Ahmad%20Nazlim.pdf

id	ukm-10297
recordtype	eprints
spelling	ukm-102972017-04-06T09:16:14Z http://journalarticle.ukm.my/10297/ Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI) Ahmad Nazlim Yusoff, Khairiah Abdul Hamid, Hamdi Hamzah, Mazlyfarina Mohamad, Siti Zamratol Mai Sarah Mukari, Wan Ahmad Kamil Wan Abdullah, High sensitivity signal detection for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI) is compensated by the increase in the number of scans (Ns) and consequently the scan time. A long scan time would result in fatigue and restlessness in participants, while a short scan time is undesirable for an STS-fMRI due to insufficient Ns for averaging. The purpose of this study was to determine the Ns practically sufficient for a sparse fMRI study. Eighteen participants were presented with white noise during a sparse fMRI scan. The height extent of activation was determined via t statistics and region of interest (ROI) based percentage of signal change (PSC). The t statistics and PSC for Heschl’s gyrus (HG) and superior temporal gyrus (STG) during which the participants listened to the white noise were calculated for different number of scans which were 6, 12, 18, 24, 30 and 36. The t statistics and PSC values calculated for the bilateral HG and STG qualitatively indicated a minimal change over Ns = 12 to 36. Both ROIs showed a consistent common right lateralization of activation for all Ns, indicating the right-hemispheric dominance of auditory cortex in processing white noise stimulus. It was proposed that for a sparse fMRI study, Ns may practically fall between 12 and 36. Penerbit Universiti Kebangsaan Malaysia 2016-10 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/10297/1/13%20Ahmad%20Nazlim.pdf Ahmad Nazlim Yusoff, and Khairiah Abdul Hamid, and Hamdi Hamzah, and Mazlyfarina Mohamad, and Siti Zamratol Mai Sarah Mukari, and Wan Ahmad Kamil Wan Abdullah, (2016) Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI). Sains Malaysiana, 45 (10). pp. 1525-1530. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol45num10_2016/contentsVol45num10_2016.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
language	English
description	High sensitivity signal detection for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI) is compensated by the increase in the number of scans (Ns) and consequently the scan time. A long scan time would result in fatigue and restlessness in participants, while a short scan time is undesirable for an STS-fMRI due to insufficient Ns for averaging. The purpose of this study was to determine the Ns practically sufficient for a sparse fMRI study. Eighteen participants were presented with white noise during a sparse fMRI scan. The height extent of activation was determined via t statistics and region of interest (ROI) based percentage of signal change (PSC). The t statistics and PSC for Heschl’s gyrus (HG) and superior temporal gyrus (STG) during which the participants listened to the white noise were calculated for different number of scans which were 6, 12, 18, 24, 30 and 36. The t statistics and PSC values calculated for the bilateral HG and STG qualitatively indicated a minimal change over Ns = 12 to 36. Both ROIs showed a consistent common right lateralization of activation for all Ns, indicating the right-hemispheric dominance of auditory cortex in processing white noise stimulus. It was proposed that for a sparse fMRI study, Ns may practically fall between 12 and 36.
format	Article
author	Ahmad Nazlim Yusoff, Khairiah Abdul Hamid, Hamdi Hamzah, Mazlyfarina Mohamad, Siti Zamratol Mai Sarah Mukari, Wan Ahmad Kamil Wan Abdullah,
spellingShingle	Ahmad Nazlim Yusoff, Khairiah Abdul Hamid, Hamdi Hamzah, Mazlyfarina Mohamad, Siti Zamratol Mai Sarah Mukari, Wan Ahmad Kamil Wan Abdullah, Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)
author_facet	Ahmad Nazlim Yusoff, Khairiah Abdul Hamid, Hamdi Hamzah, Mazlyfarina Mohamad, Siti Zamratol Mai Sarah Mukari, Wan Ahmad Kamil Wan Abdullah,
author_sort	Ahmad Nazlim Yusoff,
title	Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)
title_short	Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)
title_full	Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)
title_fullStr	Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)
title_full_unstemmed	Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)
title_sort	optimization of number of scans for a sparse temporal sampling (sts) functional magnetic resonance imaging (fmri)
publisher	Penerbit Universiti Kebangsaan Malaysia
publishDate	2016
url	http://journalarticle.ukm.my/10297/ http://journalarticle.ukm.my/10297/ http://journalarticle.ukm.my/10297/1/13%20Ahmad%20Nazlim.pdf
first_indexed	2023-09-18T19:57:02Z
last_indexed	2023-09-18T19:57:02Z
_version_	1777406597967904768

Optimization of number of scans for a sparse temporal sampling (STS) functional magnetic resonance imaging (fMRI)

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