The all-digital Ultramark 400C system continues the standard of excellence, Ultrasound the leader in OB/Gyn imaging. It features high-resolution grayscale ultrasound with the enhanced imaging performance provided by Tissue Harmonic Imaging. Tissue Harmonic Imaging enables a dramatic reduction in image artifacts, reduces haze and clutter, and significantly increases contrast resolution. It has demonstrated significant improvements in grayscale imaging, especially on those patients considered technically difficult, and provides a new level of patient-independent performance that can salvage examinations initially deemed undiagnostic.