Resona 7t

Two patients underwent ultrasonography (US) (Mindray, Resona 7 T, 5.0 mHz) in our hospital, and three other patients underwent US (parameters not available) in other hospitals. All the patients underwent a CT scan (GE, BrightSpeed 16/Phillips Brilliance 64) prior to surgery after US which indicated a mass in the spleen. Before examination, a fasting state for 8–10 h was necessary for each patient. The CT scan range was from the diaphragmatic surface to symphysis pubis, and the enhancement consisted of an arterial phase (30–35 s), portal venous phase (60–65 s), and delayed phase (150 s). US results were analyzed by two sonographers, and CT scans were assessed by three radiologists. All the decisions on the diagnosis were made upon consensus.

Five different high-resolution US scanners equipped with a linear array transducer, including Esaote Mylab 90 (Genova, Italy) with a 4-13 MHz transducer, Siemens Acuson S3000 (IL, USA) with a 4-9 MHz transducer, Philips IU22 (PA, USA) with a 3-12 MHz transducer, Philips EPIQ5 (PA, USA) with a 5-12 MHz transducer, and Mindray Resona 7T (SZ, China) with 5-14 MHz transducer were used in this study.
All lesions were examined by 7 sonographers who had over 5 years of experience in breast US scanning. Parameters were adjusted to optimize image quality, then, the grey-scale image of the longest diameter section of target lesions was documented in the JPG format for further quantification analysis.

The studies were done with patients lying in a supine position with both arms elevated above the head. And the image of the tumor at the largest diameter was saved in digital imaging and communications in medicine (DICOM) format for further investigation.
Ultrasound examination was performed by using one of the following ultrasound machines: LOGIQ E8 (GE Healthcare, United States; C5-1 convex array probes, 1–5 MHz); LOGIQ E9 (GE Healthcare, United States; C5-1 convex array probes, 1–5 MHz); Aplio 500 (Toshiba Medical systems, Japan; 6C1 probe, 1–6 MHz); i800 (Cannon Medical systems Corporation, Japan; i8CX1 probe, 1-8MHz); and Resona 7T (Mindray, China; SC6-1 U probe, 1-6MHz).