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Ultrasonic scanning systems that consist of an ultrasonic scanner, transducers (typically from 2 to 5 MHz), obstetric/gynecologic calculation package software, an image recorder (e.g., videocassette), and a color printer. Obstetric/gynecologic ultrasonic systems usually include transducers with a linear array, but most of them also include mechanical and/or electronic sector scanning configurations. These systems are used in obstetric and/or gynecologic examinations, including in utero fetal scans, and in other abdominal procedures and diagnoses (e.g., cysts, tumors).
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