A total of 623 healthy adults were included from 3 sites: The First Affiliated Hospital of Dalian Medical University (Site 1: Dalian), Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (Site 2: Ruijin), and The First Affiliated Hospital of Zhengzhou University (Site 3: Zhengzhou), equipped with a GE HDX 1.5T scanner (173 cases, 85 females, 88 males; age, 45.1 ± 14.2 years; range, 20–69 years), a Philips Ingenia 3.0T scanner (336 cases, 219 females, 117 males; age, 62.3 ± 6.5 years; range, 40–79 years), and a Siemens Prisma 3.0T scanner (114 cases, 61 females, 53 males; age, 60.3 ± 9.3 years; range, 40–90 years), respectively. All the participants provided written informed consent to participate in this study. Data were acquired using the following parameters: TR = 53/25/25 ms, TE = 40/17.5/17.5 ms, and voxel size = 0.6 mm × 0.75 mm × 3 mm = 1.35 mm; 0.67 mm × 1.34 mm × 2 mm = 1.80 mm, and 0.67 mm × 1.34 mm × 2 mm = 1.80 mm for each scanner, respectively.
Hdx 1.5t scanner
Manufactured by GE Healthcare
Sourced in United States
The HDX 1.5T scanner is a magnetic resonance imaging (MRI) system produced by GE Healthcare. It operates at a field strength of 1.5 Tesla and is designed for a variety of clinical applications. The HDX 1.5T scanner provides high-quality images to support medical diagnosis and treatment planning.
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Lab products found in correlation
4 protocols using hdx 1.5t scanner
1
Multi-site MRI Healthy Adult Study
2
Brain MRI Evaluation in Multiple Sclerosis
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At the beginning of the study, brain magnetic resonance imaging (MRI) was performed in all MS patients. Imaging was performed with the use of a General Electric HDx 1.5T scanner (USA). Patients were scanned with a standard head protocol (multiple planes, slice thickness 5 mm, contrast media: Gadovist (Gd)) and additional postcontrast 3DT1 sequences (1-mm slice thickness). The scans were evaluated according to the approximate number of supratentorial and infratentorial plaques in T2 images. The number of Gd-enhancing T1 plaques was calculated.
3
Comprehensive MRI Evaluation of MS Lesions
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The MRI was performed in all MS patients at the beginning of the study. The imaging was performed with the use of a General Electric HDx 1,5T scanner (USA). The patients were scanned with a standard head protocol [multiple planes, slice thickness 5 mm, contrast media: Gadovist (Gd)] and additional postcontrast 3DT1 sequences (1 mm slice thickness). An experienced radiologist reviewed the scans and assessed the approximate number of supratentorial and infratentorial plaques in T2 images. The number of enhancing T1 plaques was also reported.
4
Pituitary MRI and Dynamic Susceptibility Contrast Perfusion Imaging
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The MR examinations were performed on a GE Signa Hdx 1.5T scanner with a 16-channel coil dedicated to the head, neck and spine (HNS—head, neck, spine). Standard sequences for pituitary MR examination included T1-, T2-, and T1-weighted after intravenous administration of gadolinium contrast. Standard magnetic resonance imaging sequences were used to assess the dimensions (AP, TR, CC) of the lesion, morphology (solid, fluid) and the presence foci of the hemorrhage.
An additional protocol included in the study was DSC-PWI. This technique is based on changes in the magnetic field after gadolinium contrast administration in T2* images. The precise parameters of the sequence are as follows: TR = 1900 ms, TE = 80 ms, FOV = 30 cm, flip angle = 90 degrees, matrix size = 192 × 129, slice thickness 8 mm with no gap, gadolinium contrast dose 0.2 mmol/kg body weight, flow rate 5 mL/s (administered through the antecubical vein). The first 10 seconds of the scan were acquired before contrast administration in order to obtain the baseline of DSC-PWI examination.
An additional protocol included in the study was DSC-PWI. This technique is based on changes in the magnetic field after gadolinium contrast administration in T2* images. The precise parameters of the sequence are as follows: TR = 1900 ms, TE = 80 ms, FOV = 30 cm, flip angle = 90 degrees, matrix size = 192 × 129, slice thickness 8 mm with no gap, gadolinium contrast dose 0.2 mmol/kg body weight, flow rate 5 mL/s (administered through the antecubical vein). The first 10 seconds of the scan were acquired before contrast administration in order to obtain the baseline of DSC-PWI examination.
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