ULTRASOUND DIAGNOSTIC APPARATUS

A passband characteristic of a band pass filter is adapted to an examinee while a texture of an ultrasound image is maintained or is not significantly changed. A passband characteristic of a BPF is dynamically changed in accordance with a depth of an observation point (reception focus). The passband...

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Bibliographische Detailangaben
Hauptverfasser:	Terada, Takahide, Shimono, Takehiro
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEDICAL OR VETERINARY SCIENCE PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SURGERY TESTING
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Beschreibung
Zusammenfassung:	A passband characteristic of a band pass filter is adapted to an examinee while a texture of an ultrasound image is maintained or is not significantly changed. A passband characteristic of a BPF is dynamically changed in accordance with a depth of an observation point (reception focus). The passband characteristic includes convex forms, and the convex forms have peaks as highest points in a gain axis direction and have widths in a frequency axis direction. A peak position is relatively changed with respect to the width while an upper limit and a lower limit of the width are substantially maintained. Accordingly, the convex forms are biased to a low-frequency side or a high-frequency side.