Avanto 1.5 t

A variety of MRI machines (SIEMENS Aera 1.5T; SIEMENS Avanto 1.5T; GE Healthcare Signa HDxt 1.5T) was used due to our retrospective design, and different coils based on different lesion locations were used. However, standard pulse sequences including fat-suppressed T2-weighted imaging (T2WI; repetition time (TR), 2300–6600 ms; echo time (TE), 25–110 ms), axial T1-weighted imaging (T1WI; TR, 190–600 ms; TE, 1.2–12 ms), and fat-suppressed contrast-enhanced T1WI (TR, 420–630 ms; TE, 7–18 ms) were performed on each patient. The field of view (FOV) varied from 120 x 120 mm to 380 x 380 mm because of the different locations, the matrix size ranged from 288 x 224 to 320 x 224, and the slice thickness was 3 mm or 5 mm. Gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA, Omniscan, 0.1 mmol/kg body weight, 0.5 mmol/ml) was intravenously administered at a rate of 2 ml/s. Furthermore, longitudinal imaging (coronal or sagittal) was acquired for each patient.
Two kinds of CT scanners (Siemens Emotion 64 and TOSHIBA Aquilion 16) were used. Patients underwent plain CT scans, and the parameters were as follows: voltage, 120 kV; maximum tube current, 250 mAs; slice thickness, 3 mm; reconstructed slice thickness, 1 mm; slice collimation, 0.6 mm; and FOV, 380 X 380 or 120 x 120 mm.