Quadrature head coil

Manufactured by GE Healthcare

Sourced in United States

The Quadrature head coil is a specialized radiofrequency (RF) coil used in magnetic resonance imaging (MRI) systems. Its core function is to transmit and receive radio frequency signals, which are essential for creating high-quality MRI images of the human head and brain.

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Lab products found in correlation

Signa scanner, by GE Healthcare (2 mentions) Signa hd, by GE Healthcare (1 mentions) 3.0 t ge magnetic resonance imaging scanner, by GE Healthcare (1 mentions) Signa 3t whole body scanner, by GE Healthcare (1 mentions)

Spelling variants of this product

Standard quadrature head coil (4 citations) Eight-channel quadrature head coil (3 citations) Quadrature sending and receiving head coil (2 citations) Single channel quadrature head coil (2 citations)

8 protocols using quadrature head coil

Multimodal Neuroimaging in Alzheimer's Disease

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All participants underwent structural MRI with a 3.0-T GE scanner (Signa HD, WI, USA) and a standard GE quadrature head coil. The MRI and PET/CT examinations were performed within one week. The scan protocol included a high-resolution 3D T1-weighted spoiled gradient recalled echo sequence (TR = 7.0 ms, TE = 2.9 ms, Inversion time = 450 ms, thickness = 1.2 mm, matrix = 256 × 256, FOV = 240 mm, and in plane resolution = 0.9 × 0.9 mm²) to produce contiguous sagittal anatomic images for subsequent spatial normalization and coregistration.
The preprocessing of MRI and PET imaging is detailed elsewhere [10 (link)]. Specifically, all structural MRI images were segmented into gray matter, white matter, and cerebrospinal fluid and then used to construct a population template using DARTEL of SPM8 (http://www.fil.ion.ucl.ac.uk/spm). The mid-frame (the 16th frame) of the dynamic PIB images and FDG images was coregistered with the corresponding MRI scan, and the PET scans were transformed to the population template with the deformation fields generated in the registration procedure of the MRI scans. Finally, all images were spatially normalized to the Montreal Neurological Institute space.

Fu L., Liu L., Zhang J., Xu B., Fan Y, & Tian J. (2018). Brain Network Alterations in Alzheimer's Disease Identified by Early-Phase PIB-PET. Contrast Media & Molecular Imaging, 2018, 6830105.

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Multimodal Brain Imaging Protocol

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Scanning was performed using a 3.0-T GE magnetic resonance imaging (MRI) scanner (GE Healthcare Life Sciences, Little Chalfont, UK) with a quadrature head coil at the Taipei Veterans General Hospital. Anatomical whole-brain image volumes were determined using a sagittal magnetization-prepared rapid acquisition gradient-echo three-dimensional T1-weighted sequence (repetition time [TR] = 2530 ms, echo time [TE] = 3 ms, echo spacing = 7.25 ms, flip angle [FA] = 7 degrees, field of view = 256 × 256 mm, voxel size = 1 × 1 × 1 mm). Furthermore, resting-state functional MR images were obtained through a T2*-weighted gradient-echo approach, echo-planar sequence (TR = 2500 ms, TE = 30 ms, FA = 90 degrees, and voxel size = 3.5 × 3.5 × 3.5 mm). Two hundred MRI volumes of each subject were obtained with their eyes closed. A functional whole-brain image volume comprised 43 interleaved horizontal slices, all parallel with the intercommissural plane. Furthermore, the acquired T1-weighted images provided better correction for the anatomical interpretation from functional analysis.

Chen Y.L., Tu P.C., Huang T.H., Bai Y.M., Su T.P., Chen M.H, & Wu Y.T. (2021). Identifying subtypes of bipolar disorder based on clinical and neurobiological characteristics. Scientific Reports, 11, 17082.

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Longitudinal MRI Acquisition Consistency

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All MRI data were collected on a GE 1.5T Signa Twin whole-body system with a quadrature head coil (General Electric Healthcare, Waukesha, WI). Two coronal structural sequences were used for the analysis: a SPoiled Gradient Recalled (SPGR) echo sequence (TR=25 ms, TE=5 ms, flip angle=30°, matrix=256×192, FOV=24 cm, thick=2 mm, skip=0 mm, 94 slices) and a dual-echo fast spin echo (FSE) sequence (TR=7500 ms, TE1/2=13.5/108.3 ms, matrix = 256×192, FOV=24 cm, thick=4 mm, skip=0 mm, 47 slices). The imaging parameters for this longitudinal study were established 10 years ago and maintained throughout the study. For further assurance of consistency over the study period, we have complete control over the acquisition protocols for our MRI studies. Even though this study extended over a considerable period of time, we used the same acquisition protocol and ran phantoms before and after equipment upgrades to examine drift. Routine phantom data were used to evaluate spatial fidelity, and drift was corrected by adjusting scanner calibration parameters when necessary to maintain spatial stability within manufacturer guidelines.

Pfefferbaum A., Rogosa D.A., Rosenbloom M.J., Chu W., Sassoon S.A., Kemper C.A., Deresinski S., Rohlfing T., Zahr N.M, & Sullivan E.V. (2014). Accelerated Aging of Selective Brain Structures in HIV Infection: A Controlled, Longitudinal MRI Study. Neurobiology of aging, 35(7), 1755-1768.

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Functional MRI of Cyberball Task

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Images were acquired on a 1.5T General Electric scanner with a birdcage-type standard quadrature head coil and an advanced nuclear magnetic resonance echoplanar system. Foam padding was used to limit head motion. High-resolution T₁-weighted anatomical images (3D SPGR, TR = 10 ms, TE = 3 ms, voxel dimensions 1.0 × 1.0 × 1.5 mm, 256 × 256 voxels, 124 slices) were acquired for co-registration and normalization of functional images. During the Cyberball task a total of 230 co-planar functional images were acquired using a gradient echoplanar sequence (TR = 2100 ms, TE = 40 ms, voxel dimensions 3.75 × 3.75 × 5.0 mm, 64 × 64 voxels, 28 slices). The rest blocks were 31.5 s in length (15 vol). Inclusion and Exclusion blocks lasted 3.5 min (100 vol). The scanning planes were oriented parallel to the anterior–posterior commissure line and extended from the superior extent of motor cortex to the base of the cerebellum. Six volumes of data were acquired during the 20 s countdown period and immediately discarded to allow for equilibrium before selections began.

Hanlon C.A., Shannon E.E, & Porrino L.J. (2018). Brain activity associated with social exclusion overlaps with drug-related frontal-striatal circuitry in cocaine users: A pilot study. Neurobiology of Stress, 10, 100137.

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Functional MRI Brain Imaging Protocol

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Image acquisition was collected using a 3 Tesla GE Signa scanner equipped with a quadrature head coil (General Electric, Milwaukee, WI). Participants used a button box to make responses. The task was projected onto a screen and participants wore goggles with built-in mirrors (VisuaStim XGA, Resonance Technologies) to view the display. Foam padding and a cloth forehead restraint were used to prevent head movement. A T1 overlay with Fast Gradient Echo Sequence 15 was conducted to obtain an anatomical image (TR = 250 ms, TE = 5.7 ms, flip angle = 90°, field of view (FOV) = 24 cm, 43 slices). Automatic slice prescription, based on alignment of localizer scans to a multi-subject atlas, was used to achieve a consistent head position across subjects. Functional T2* BOLD images were acquired with a spiral reverse only sequence. For each TR, 43 3mm slices were captured (TR = 2000 ms, TE = 30 ms, flip angle = 90°, field of view (FOV) = 22 cm, voxel size = 3.44 mm × 3.44 mm × 3 mm).

Arredondo M.M., Ip K.I., Shih Ju Hsu L., Tardif T, & Kovelman I. (2015). Brain bases of morphological processing in young children. Human Brain Mapping, 36(8), 2890-2900.

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Multimodal Brain Imaging Preprocessing

Cited 1 time

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Structural, functional (fMRI), and diffusion-weighted (DWI) imaging data were acquired using a GE Signa 3T whole-body scanner using a GE quadrature head coil. Imaging acquisition parameters are described elsewhere^{20 (link)} and in the Supplementary Materials. FMRI and DWI imaging preprocessing was performed using an in-house pipeline created with Nipype^{36 (link)} using Freesurfer v5.3^{37 (link)} and FSL^{38 (link)}. Further detail on this preprocessing, as well as information about the construction of functional connectivity (fMRI FC), fractional anisotropy (DWI FA) and mean diffusivity (DWI MD) summary features are described in the Supplementary Materials.

Reinen J.M., Polosecki P., Castro E., Corcoran C.M., Cecchi G.A, & Colibazzi T. (2024). Multimodal fusion of brain signals for robust prediction of psychosis transition. Schizophrenia, 10(1), 54.

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Functional MRI Acquisition Protocol

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Image acquisition was collected using a 3-Tesla GE Signa scanner equipped with a quadrature head coil (General Electric, Milwaukee, WI). Participants used a button box to make responses. The tasks were projected onto a screen and participants wore goggles with built-in mirrors (VisuaStim XGA, Resonance Technologies) to view the display. Foam padding and a cloth forehead restraint were used to prevent head movement. A T1 overlay with Fast Gradient Echo Sequence 15 was conducted to obtain an anatomical image (TR = 250ms, TE = 5.7ms, flip angle = 90°, field of view (FOV) = 24cm, 43 slices). Automatic slice prescription, based on alignment of localizer scans to a multi-subject atlas, was used to achieve a consistent head position across subjects. Functional T2* BOLD images were acquired with a spiral reverse only sequence. For each TR, 43 3mm slices were captured (TR = 2000ms, TE = 30ms, flip angle = 90°, FOV = 22cm, voxel size = 3.44mm × 3.44mm × 3mm).

Ip K.I., Hsu L.S., Arredondo M.M., Tardif T, & Kovelman I. (2016). Brain Bases of Morphological Processing in Chinese-English Bilingual Children. Developmental science, 20(5), 10.1111/desc.12449.

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MRI-Guided Stereotactic Biopsy Protocol

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The MRI evaluation should encompass both the indicator box and the infratentorial region that deviated from it.
As shown in Fig. 2A, the MR-Indicator box is positioned on top of the head, the MR-adapter is secured, and the MRI scanning is conducted. Stereotactic MR images are acquired using a SIGNA EXCITE 1.5T MRI scanner (GE Healthcare, Chicago, IL, USA) equipped with a 275 mm inner diameter Quadrature Head Coil (GE Healthcare). The imaging isocenter is situated at the lower portion of the frame, precisely at the level represented in c of Fig. 2. The MRI evaluation should encompass both the indicator box and the infratentorial region that deviated from it (Fig. 2B). Noteworthy that the signal may be weak in the areas outside the indicator box due to the distance from the magnetic field. Before biopsy planning, confirm that the target location is identifiable on MRI scans.

Lee T.K., Lim S.H., Jeong J., Park S.J., Kim Y.J., Moon K.S., Kim I.Y., Jung S, & Jung T.Y. (2024). Leksell Frame-Based Stereotactic Biopsy for Infratentorial Tumor : Practical Tips and Considerations. Journal of Korean Neurosurgical Society, 67(2), 249-256.

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