scholarly journals Functional Magnetic Resonance Imaging of Regional Cerebral Blood Oxygenation Changes During Breath Holding

Stroke ◽  
1998 ◽  
Vol 29 (12) ◽  
pp. 2641-2645 ◽  
Author(s):  
Andreas Kastrup ◽  
Tie-Qiang Li ◽  
Atsuchi Takahashi ◽  
Gary H. Glover ◽  
Michael E. Moseley
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Blood Oxygenation ◽  
Breath Holding ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Regional Cerebral Blood ◽  
Cerebral Blood Oxygenation

scholarly journals Brief breath holding may confound functional magnetic resonance imaging studies

2005 ◽  
Vol 24 (4) ◽  
pp. 284-290 ◽  
Author(s):  
David F. Abbott ◽  
Helen I. Opdam ◽  
Regula S. Briellmann ◽  
Graeme D. Jackson
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Breath Holding ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Imaging Studies

A Quantitative Physiologic Model of Blood Oxygenation for Functional Magnetic Resonance Imaging

1995 ◽  
Vol 30 (11) ◽  
pp. 669-682 ◽  
Author(s):  
GASSER M. HATHOUT ◽  
SANJIV S. GAMBHIR ◽  
RAMESH K. GOPI ◽  
KONRAD A.T. KIRLEW ◽  
YONG CHOI ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Blood Oxygenation ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Physiologic Model

Magnetic Resonance Imaging of Regional Cerebral Blood Oxygenation Changes Under Acetazolamide in Carotid Occlusive Disease

Stroke ◽  
1995 ◽  
Vol 26 (1) ◽  
pp. 106-110 ◽  
Author(s):  
Andreas Kleinschmidt ◽  
Helmuth Steinmetz ◽  
Matthias Sitzer ◽  
Klaus-Dietmar Merboldt ◽  
Jens Frahm
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Blood Oxygenation ◽  
Occlusive Disease ◽  
Resonance Imaging ◽  
Regional Cerebral Blood ◽  
Carotid Occlusive Disease ◽  
Cerebral Blood Oxygenation

scholarly journals A Functional Magnetic Resonance Imaging Technique Based on Nulling Extravascular Gray Matter Signal

2008 ◽  
Vol 29 (1) ◽  
pp. 144-156 ◽  
Author(s):  
Yuji Shen ◽  
Risto A Kauppinen ◽  
Rishma Vidyasagar ◽  
Xavier Golay
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Gray Matter ◽  
Visual Stimulation ◽  
Brain Activation ◽  
Blood Oxygenation ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Fmri Signal

A new functional magnetic resonance imaging (fMRI) technique is proposed based on nulling the extravascular gray matter (GM) signal, using a spatially nonselective inversion pulse. The remaining MR signal provides cerebral blood volume (CBV) information from brain activation. A theoretical framework is provided to characterize the sources of GM-nulled (GMN) fMRI signal, effects of partial voluming of cerebrospinal fluid (CSF) and white matter, and behaviors of GMN fMRI signal during brain activation. Visual stimulation paradigm was used to explore the GMN fMRI signal behavior in the human brain at 3T. It is shown that the GMN fMRI signal increases by 7.2% ± 1.5%, which is two to three times more than that obtained with vascular space occupancy (VASO)-dependent fMRI (−3.2% ± 0.2%) or blood oxygenation level-dependent (BOLD) fMRI (2.9% ± 0.7%), using a TR of 3,000 ms and a resolution of 2 × 2 × 5 mm3. Under these conditions the fMRI signal-to-noise ratio (SNRfMRI) for BOLD, GMN, and VASO images was 4.97 ± 0.76, 4.56 ± 0.86, and 2.43 ± 1.06, respectively. Our study shows that both signal intensity and activation volume in GMN fMRI depend on spatial resolution because of partial voluming from CSF. It is shown that GMN fMRI is a convenient tool to assess CBV changes associated with brain activation.

Distinctive Cortical Articulatory Representation in Cleft Lip and Palate: A Preliminary Functional Magnetic Resonance Imaging Study

2006 ◽  
Vol 43 (5) ◽  
pp. 620-624 ◽  
Author(s):  
Hideo Shinagawa ◽  
Takashi Ono ◽  
Ei-ichi Honda ◽  
Tohru Kurabayashi ◽  
Atsushi Iriki ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Sensorimotor Cortex ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Blood Oxygenation ◽  
Cortical Representation ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging

Objective: To investigate cortical representation of articulation of the bilabial plosive in patients with cleft lip and palate. Design: We examined cortical representation for /pa/-articulation in cleft lip and palate patients using blood oxygenation level–dependent functional magnetic resonance imaging. Subjects: Data from four postsurgical adult cleft lip and palate patients were compared with those from six healthy volunteers. Results: Activation foci were found in the bilateral primary sensorimotor cortex in all cleft lip and palate patients, as in the controls. The sensorimotor cortex ipsilateral to the side of cleft lip and palate showed greater activation in unilateral cleft lip and palate patients, whereas the sensorimotor cortex contralateral to the side on which cheiloplasty had been performed earlier showed greater activation in a bilateral cleft lip and palate patient. Conclusions: The results suggest that there may be an ipsilateral dominance in cortical representation during bilabial articulation to the side of the cleft in the upper lip.

Quantitative assessment of blood flow, blood volume and blood oxygenation effects in functional magnetic resonance imaging

1998 ◽  
Vol 4 (2) ◽  
pp. 159-167 ◽  
Author(s):  
Peter C.M. van Zijl ◽  
Scott M. Eleff ◽  
John A. Ulatowski ◽  
Joni M.E. Oja ◽  
Aziz M. Uluǧ ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Blood Volume ◽  
Quantitative Assessment ◽  
Blood Oxygenation ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging

Pediatric Functional Magnetic Resonance Imaging: Clinical Applications

2017 ◽  
Vol 16 (02) ◽  
pp. 078-093
Author(s):  
Kirk Welker ◽  
Mai-Lan Ho
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Study Design ◽  
Pediatric Population ◽  
Clinical Applications ◽  
Blood Oxygenation ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Design Data

AbstractTask-based functional magnetic resonance imaging (fMRI) is an imaging technique based on blood oxygenation level-dependent imaging. Maps of brain activation are generated during the performance of designated tasks involving eloquent functions, such as motor, sensory, visual, auditory, and/or language. Optimal performance of fMRI in children requires consideration of multiple psychological and physiological parameters. Also, a solid technical understanding is needed for appropriate study design, implementation, processing, and interpretation. In this article, the authors review the key principles of fMRI technique, study design, data processing, and interpretation. The important clinical applications in the pediatric population will be highlighted, accompanied by example cases from their institution.

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