The MR imaging was performed using 3T-MR units (Achieva Tx or Ingenia, Philips, Best, The Netherlands) with an eight-channel head coil for the Achieva Tx and a 12-channel head coil for the Ingenia during natural sleep. Sedating agents were not used for MR scanning. Infants were wrapped with a vacuum pillow to reduce their movements during MR scanning. A small silencer headphone was used. In this study, MR images for three-dimensional (3D) thin-slice T1-weighted gradient-echo images were analyzed, which were obtained with the following parameters: repetition time/echo time, 9.5/4.4 ms; inversion time, 1200 ms; matrix, 192 × 174; field of view, 160 × 143 mm; flip angle, 8°; slice thickness, 0.9 mm; average number, 1; slice number, 120; turbo factor (number of data samplings per shot), 200; parallel imaging sensitivity encoding factor, 1.5; and acquisition time, 2 min 52 s. The imaging resolution was 0.83 × 0.82 × 0.90 mm.
Achieva tx
Manufactured by Philips
Sourced in Netherlands, United States, Germany
Achieva TX is a magnetic resonance imaging (MRI) system developed by Philips. It is designed to provide high-quality imaging capabilities for various clinical applications. The core function of the Achieva TX is to generate detailed and accurate images of the body's internal structures using magnetic fields and radio waves.
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Lab products found in correlation
Ingenia, by Philips (7 mentions)
32 channel head coil, by Philips (7 mentions)
Gadovist, by Bayer (3 mentions)
16 channel neurovascular coil, by Philips (3 mentions)
8 channel head coil, by Philips (3 mentions)
Bpx 30, by Bayer (2 mentions)
Ingenia, by Siemens (2 mentions)
36 channel neurovascular coil, by Philips (2 mentions)
Achieva, by Philips (2 mentions)
Sense head coil, by Philips (2 mentions)
Intellispace portal, by Philips (2 mentions)
Magnevist, by Bayer (2 mentions)
Primovist, by Bayer (1 mentions)
Fluorinert fc 770, by 3M (1 mentions)
Invivo, by Philips (1 mentions)
32 channel sense head coil, by Philips (1 mentions)
Intellispace, by Philips (1 mentions)
Cvi42 v5, by Circle Cardiovascular Imaging (1 mentions)
32 channel cardiac phased array receiver coil, by Philips (1 mentions)
Ingenia cx, by Philips (1 mentions)
151 protocols using achieva tx
1
Optimizing Infant Brain Imaging with 3T-MRI
2
Brain MRI Protocol for Cluster Headache
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All MRI scans of the participants were obtained using the same MRI scanner, which was a 3 tesla with a 32‐channel head coil (AchievaTx; Phillips Healthcare). From March 2018, routine brain MRI protocols at our hospital for patients with cluster headache included DTI. All of the MRI scanning was conducted during out‐of‐out phase of headache attacks in patients with cluster headache, and MRI scans were performed during the daytime in all participants (before 5 pm). The participants underwent the same brain MRI protocol, which included three‐dimensional (3D) FLAIR imaging, coronal T2‐weighted imaging, 3D T1‐weighted imaging, and DTI. FLAIR and T2‐weighed imaging were used to evaluate the structural abnormalities of the brain. The detailed MR parameters for DTI with 32 different diffusion directions have been described in our previous studies (Lee et al., 2021 (link))
3
Multiphasic Gadoxetic Acid-Enhanced MRI Imaging
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MRI was performed on a 3.0 Tesla clinical scanner (Achieva TX; Philips Healthcare, Best, The Netherlands) with a 16-channel sense torso coil. The imaging sequences included axial fat-suppressed T2-weighted imaging [repetition time/echo time (TR/TE), 1650/80 ms; slice thickness/gap, 3.5/1 mm; matrix, 528 × 288; number of signals acquired (NSA), 2], axial T1-weighted imaging using mDixon fast field echo sequence (number of echoes, 2; TR, 3.4 ms; TE, 1.14 and 2.1 ms; flip angle, 10°; slice thickness/gap, 3/1 mm; matrix, 528 × 288; NSA, 1) and coronal T1 high resolution isotropic volume examination (THRIVE) sequence (TR/TE, 3.1/1.4 ms; flip angle, 10°; slice thickness/gap, 3/1 mm; matrix, 528 × 288; NSA, 2). After intravenous injection of gadoxetic acid (Gd-EOB-DTPA; Primovist, Bayer-Schering Pharma, Berlin, Germany) at a dosage of 0.025 mmol/kg of body weight via the antecubital vein at a rate of 2.5 mL/s, patients underwent multiphasic axial contrast-enhanced T1 high resolution isotropic volume examination (e-THRIVE) imaging, which was performed with the same parameters as their unenhanced counterparts. Early arterial phase, later arterial phase, portal phase, venous phase, and equilibrium phase images were obtained respectively at 20, 30, 40, 60 and 100 s after the injection of contrast agents. The HBP images were obtained at 20 min after the injection of gadoxetic acid.
4
Multiparametric MRI of Prostate Cancer
5
Quantitative Analysis of Late Gadolinium Enhancement in Cardiac MRI
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Cardiac magnetic resonance imaging was carried out using a 1.5T whole‐body scanner (Achieva, Philips Medical Systems, Best, the Netherlands) with a cardiac five‐channel phased‐array cardiac coil or a 3‐T whole‐body scanner (Achieva Tx, Philips Medical Systems) with a 32‐channel phased‐array receiver torso‐cardiac coil. Gadolinium‐enhanced CMR imaging was performed 10–15 min after intravenous administration of 0.1 mmol/kg gadolinium diethylenetriamine penta‐acetic acid (Magnevist, Bayer Yakuhin, Osaka, Japan) or gadobutrol (Gadovist, Bayer Yakuhin, Osaka, Japan). The LV short‐axis images were obtained using a fast‐field echo pulse sequence with inversion recovery with fat saturation or a phase‐sensitive inversion recovery sequence. The optimal inversion time was selected to null the signal from normal myocardium using a Look‐Locker sequence. Although 64 patients underwent CMR, we analysed 50 patients after excluding those without sufficient quality of imaging data to analyse CMR (n = 14).
We used commercially available software Ziostation2® (Ziosoft Inc., Tokyo, Japan) for quantitative analysis of LGE. The LGE was defined as the region with signal intensity ≥5 standard deviations (SD) above the mean CMR signal intensity of the normal remote myocardium.15 The total amount of LGE was calculated as a percentage of the LV mass (%LGE).
We used commercially available software Ziostation2® (Ziosoft Inc., Tokyo, Japan) for quantitative analysis of LGE. The LGE was defined as the region with signal intensity ≥5 standard deviations (SD) above the mean CMR signal intensity of the normal remote myocardium.
6
Comparison of 1.5T and 3T CMR Scanners
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A total of 300 consecutive patients referred for clinical CMR including LGE between March and September 2017 were included. Patients were randomly allocated to either a 1.5 T or 3 T clinical CMR scanner of different vendors: 1.5 T Ingenia (Philips Healthcare, Best, the Netherlands) [n = 100], 1.5 T Aera (Siemens Healthineers, Erlangen, Germany) [n = 100], and 3 T Achieva TX (Philips Healthcare) [n = 100]. The study was approved by the local ethics committee (15/NS/0030) and was conducted according to the Declaration of Helsinki. Written informed consent was obtained from all patients for inclusion in the study and for additional CMR imaging during their clinical CMR exam.
7
3T MRI Acquisition Protocol for Brain Imaging
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T1-Weighted MR images were acquired with a 3D turbo field echo sequence using a 3-Tesla scanner (Achieva TX, Philips Healthcare, Best, The Netherlands) at the Department of Radiology, Kyushu University Hospital. The imaging variables were as follows: repetition time = 8.2 msec, echo time = 3.8 msec, flip angle = 8°, field of view = 24 × 24 cm, number of echoes = 1, matrix = 240 × 240, inversion time = 1025.9 msec, number of slices = 190, and slice thickness = 1 mm. Images were aligned using the line between the anterior and posterior commissures (AC-PC) and the sagittal sulcus to correct head tilt.
8
Brain MRI in Migraine Patients
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Patients with migraines and healthy controls underwent brain MRI with the same sequences using the same 3‐Tesla MRI scanner equipped with a 32‐channel head coil (AchievaTx, Phillips Healthcare). All brain MRI scans were performed in the interictal state without headache in patients with migraines. The MR sequences were routine MRI protocols for patients with migraine in the study center, including three‐dimensional fluid‐attenuated inversion recovery, coronal T2‐weighted imaging, three‐dimensional T1‐weighted imaging, and DTI. Three‐dimensional T1‐weighted images were obtained using a turbo‐field echo sequence with the following parameters: TI = 1300 ms, repetition time/echo time (TR/TE) = 8.6/3.96 ms, flip angle (FA) = 8°, and 1 mm3 isotropic voxel size. The specific DTI parameters were as follows: 32 different diffusion directions, b‐values of 0 and 1000 s/mm2 (b0 images were acquired once), TR/TE = 8620/85 ms, FA = 90°, slice thickness = 2.25 mm, acquisition matrix = 120 × 120, field of view = 240 × 240 mm2, and parallel imaging factor (SENSE) = 2.
9
Multi-b-value IVIM Imaging of the Brain
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Patients underwent brain imaging on a 3.0 Tesla MR scanner (Achieva TX, Philips Healthcare, Best, the Netherlands) using a 32-element head coil suitable for parallel imaging. For anatomical segmentation a T1-weighted sequence (TR/TI/TE = 8.3/800/3.8 ms; FOV 256 × 256 × 160 mm3; 1.0 mm3 isotropic voxel) and a T2-weighted FLAIR sequence (TR/TI/TE = 4800/1650/299 ms; FOV 256 × 256 × 180 mm3; 1.0 mm isotropic voxel) were performed respectively.
IVIM imaging was conducted as described before (van Bussel et al., 2015 (link)). In brief, a Stejskal-Tanner diffusion weighted (DW) spin echo single shot echo planar imaging pulse sequence (TR/TE = 6800/84 ms; FOV 221 × 269 × 139 mm3; 2.4 mm isotropic voxel; acquisition time 5:13 min) was used. To minimize the signal contamination of CSF, an inversion recovery pulse (TI = 2230 ms) was given prior to the DW sequence (Hales & Clark, 2012 ). Fifteen DW images were acquired in the anterior-posterior direction using multiple diffusion sensitive b-values (0, 5, 7, 10, 15, 20, 30, 40, 50, 60, 100, 200, 400, 700, and 1000 s/mm2). To increase the signal-to-noise ratio (SNR) (Appendix 1.2) at high b-values the number of signal averages for the highest two b-values were two and three, instead of one, respectively.
IVIM imaging was conducted as described before (van Bussel et al., 2015 (link)). In brief, a Stejskal-Tanner diffusion weighted (DW) spin echo single shot echo planar imaging pulse sequence (TR/TE = 6800/84 ms; FOV 221 × 269 × 139 mm3; 2.4 mm isotropic voxel; acquisition time 5:13 min) was used. To minimize the signal contamination of CSF, an inversion recovery pulse (TI = 2230 ms) was given prior to the DW sequence (Hales & Clark, 2012 ). Fifteen DW images were acquired in the anterior-posterior direction using multiple diffusion sensitive b-values (0, 5, 7, 10, 15, 20, 30, 40, 50, 60, 100, 200, 400, 700, and 1000 s/mm2). To increase the signal-to-noise ratio (SNR) (Appendix 1.2) at high b-values the number of signal averages for the highest two b-values were two and three, instead of one, respectively.
10
Brain MRI and DTI Protocol for FCD
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All subjects, patients with FCD as well as healthy controls, underwent brain MRI with the same scanner and protocols. MRI scans were performed using a 3.0T MRI scanner (AchievaTx, Phillips Healthcare, Best, The Netherlands) equipped with a 32-channel head coil. All subjects underwent brain MRI, as follows: 3-dimensional (3D) fluid-attenuated inversion recovery (FLAIR), coronal T2-weighted imaging, 3D T1-weighted imaging, and DTI. 3D T1-weighted images were obtained using a turbo-field echo sequence (TI = 1300 ms, repetition time/echo time [TR/TE] = 8.6/3.96 ms, flip angle = 8°, and 1 mm3 isotropic voxel size). DTI was performed using spin-echo single-shot echo-planar pulse sequences in 32 different diffusion directions (TR/TE = 8620/85 ms, flip angle = 90°, slice thickness = 2.25 mm, acquisition matrix = 120 × 120, field of view = 240 × 240 mm2, and b-value = 1,000 s/mm2).
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