Most MR scans were performed using a 1.5-T MRI (GyroscanAchieva 1.5 T; Philips Healthcare, Best, the Netherlands) equipped with an 8-channel head coil. The scanning parameters were set as follows: T1WI (repetition time/echo time [TR/TE], 593/15 milliseconds), T2WI (TR/TE, 3720/100 milliseconds), fluid-attenuated inversion recovery (FLAIR) images (TR/TE, 11000/140 milliseconds; range of inversion times, 2400 milliseconds), and enhanced T1WI (TR/TE, 488/15 milliseconds). The remaining MR examinations were performed using a 1.5-T MRI (Signa Excite HD; GE Healthcare, Milwaukee, Wis) equipped with an 8-channel head coil. The scanning parameters were set as follows: T1WI (TR/TE, 400/11 milliseconds), T2WI (TR/TE, 4300/100 milliseconds), FLAIR images (TR/TE, 8400/120 milliseconds; range of inversion times, 2100 milliseconds), and enhanced T1WI (TR/TE, 500/20 milliseconds). All images for all sequences were 5-mm thick with an interslice gap of 1.0 mm. The matrix size was 256 × 256, and the field of view was 18 cm. The contrast agent for enhanced scan was gadopentetate dimeglumine (Bayer, Germany), injected at a dose of 0.1 mmol/kg. Uncooperative children were given chloral hydrate enema (0.5 mL/kg) sedative before the examination.
Gyroscanachieva 1.5 t
Manufactured by Philips
Sourced in Netherlands
The GyroscanAchieva 1.5 T is a magnetic resonance imaging (MRI) system manufactured by Philips. It operates at a field strength of 1.5 Tesla, which is a common field strength used in medical imaging. The GyroscanAchieva 1.5 T is designed to acquire high-quality MRI images for diagnostic purposes.
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2 protocols using gyroscanachieva 1.5 t
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Magnetic Resonance Imaging Protocols for Pediatric Patients
2
MRI Imaging Protocol for Brain Assessment
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1.5T MRI (GyroscanAchieva 1.5 T, Philips Healthcare, Best, Netherlands) equipped with an 8-channel head coil was used to performed the scan. The acquisition parameters were as follows: pre-contrast T1-weighted (T1-w) images (TR/TE = 593/15 ms, FOV = 18 × 18 cm, matrix = 256 × 256, slice thickness = 5 mm, spacing = 1.0 mm); T2-weighted (T2-w) images (TR/TE = 3720/100 ms, FOV = 18 × 18 cm, matrix = 256 × 256, slice thickness = 5 mm, spacing = 1.0 mm); T2/fluid-attenuated inversion-recovery (T2/FLAIR) images (TR/TE: 11000/140 ms, range of inversion time = 2400 ms, FOV = 18 × 18 cm, matrix = 256 × 256, slice thickness = 5 mm, spacing = 1.0 mm); and contrast-enhanced T1-w images (TR/TE: 488/15 ms, FOV = 18 × 18 cm, matrix = 256 × 256, slice thickness = 5 mm, spacing = 1.0 mm). Contrast MRI was performed using GD-DTPA (Bayer, Germany) at a dose of 0.1 mmol/kg.
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