Temperature measurements were taken using MR spectroscopy. To extract brain temperature, this technique utilized the difference between the chemical shift of water, which is temperature dependent, and the metabolite N-acetylaspartate (NAA), which is independent of temperature (Fig. 1 ). Data were acquired using a 3T Philips Achieva dStream MRI scanner. The pulse sequence used was based on single voxel point resolved spectroscopy with TE/TR = 144/2000 ms, 16 averages, 44 s per acquisition. The sequence was modified to provide partial water saturation to enable measurement of both water and NAA reference from the same acquisition. Measurements were derived from the following equation: Temp. °C = 296.1–97.1 (Δwater–N-acetylaspartate).
Achieva dstream mri scanner
Manufactured by Philips
Sourced in Netherlands
The Achieva dStream MRI scanner is a diagnostic imaging device manufactured by Philips. It utilizes magnetic resonance imaging (MRI) technology to capture detailed images of the human body. The scanner's core function is to generate high-quality, cross-sectional images of internal organs, tissues, and structures, which can be used by healthcare professionals for medical diagnosis and treatment planning.
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Lab products found in correlation
3 protocols using achieva dstream mri scanner
1
Brain Temperature Measurement via MRI
2
Functional MRI of Naturalistic Audio-Visual Stimuli
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Gradient-echo fMRI data for the audio-description study were acquired using a 7 Tesla Siemens MAGNETOM magnetic resonance scanner equipped with a 32 channel brain receive coil at 2 s repetition time (TR) with 36 axial slices (thickness 1.4 mm, 1.4 × 1.4 mm in-plane resolution, 224 mm field-of-view, anterior-to-posterior phase encoding direction) and a 10% inter-slice gap, recorded in ascending order. Slices were oriented to include the ventral portions of frontal and occipital cortex while minimizing intersection with the eyeballs. The field of view was centered on the approximate location of Heschl’s gyrus. EPI images were online-corrected for motion and geometric distortions.
In the movie and block-design localizer study, a 3 Tesla Philips Achieva dStream MRI scanner with a 32 channel head coil acquired gradient-echo fMRI data at 2 s repetition time with 35 axial slices (thickness 3.0 mm, 10% inter-slice gap) with 80 × 80 voxels (3.0 × 3.0 mm of in-plane resolution, 240 mm field-of-view) and an anterior-to-posterior phase encoding direction, recorded in ascending order. A total of 3599 volumes were recorded for each participant in each of the naturalistic stimulus paradigms (audio-description and movie).
In the movie and block-design localizer study, a 3 Tesla Philips Achieva dStream MRI scanner with a 32 channel head coil acquired gradient-echo fMRI data at 2 s repetition time with 35 axial slices (thickness 3.0 mm, 10% inter-slice gap) with 80 × 80 voxels (3.0 × 3.0 mm of in-plane resolution, 240 mm field-of-view) and an anterior-to-posterior phase encoding direction, recorded in ascending order. A total of 3599 volumes were recorded for each participant in each of the naturalistic stimulus paradigms (audio-description and movie).
3
Multimodal MRI Protocol for Brain Imaging
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MR imaging was performed using a 3T Achieva dStream MRI scanner (Philips Healthcare, Best, Netherlands), a 1.5 T Optima MRI scanner (General Electric Healthcare, Milwaukee, WI, USA), or a 1.5 T Magnetom Avanto Fit (Siemens Healthineers, Erlangen, Germany).
Briefly, standard imaging included diffusion-weighted imaging (DWI) (b0 and b1000 with apparent diffusion coefficient (ADC) map), T2-weighted fluid-attenuated inversion recovery (T2-FLAIR) sequence, and a 3D-T1-weighted MRI scan after injection (T1-GD) of a standard dose of contrast agent (Gd-DTPA; 0.1 mmol/kg body weight). For perfusion-weighted imaging, dynamic susceptibility-weighted contrast-enhanced T2* (PWI) was achieved. Parametric maps of relative cerebral blood volume corrected for contrast leakage (rCBV) and of a permeability estimation map (K2) were created from PWI using (v3.0 Olea Medical, La Ciotat, France) [18 (link),19 (link)].
Briefly, standard imaging included diffusion-weighted imaging (DWI) (b0 and b1000 with apparent diffusion coefficient (ADC) map), T2-weighted fluid-attenuated inversion recovery (T2-FLAIR) sequence, and a 3D-T1-weighted MRI scan after injection (T1-GD) of a standard dose of contrast agent (Gd-DTPA; 0.1 mmol/kg body weight). For perfusion-weighted imaging, dynamic susceptibility-weighted contrast-enhanced T2* (PWI) was achieved. Parametric maps of relative cerebral blood volume corrected for contrast leakage (rCBV) and of a permeability estimation map (K2) were created from PWI using (v3.0 Olea Medical, La Ciotat, France) [18 (link),19 (link)].
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