Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1996-12-30
1998-08-25
Jaworski, Francis
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600443, 327254, A61B 800, A61N 700
Patent
active
057978476
ABSTRACT:
A phased array sector scanning ultrasonic system includes a separate beamformer channel for each respective element in an ultrasonic transducer array. Each beamformer channel has a three-stage complex FIR filter downstream of an analog-to-digital converter. Each filter circuit stage has a register pipeline, an in-phase FIR filter and a quadrature FIR filter. The first stage only has real samples, so there is a single pipeline. The other stages have complex inputs composed of in-phase (real) and quadrature (imaginary) samples, requiring a pipeline for each. Each register pipeline is made up of a multiplicity of registers connected in series. The number of registers in a given pipeline must equal the number of taps being used on the FIR filter immediately downstream of the register pipeline. The registers are clocked in synchronism and store successive echo data samples. Each register in the pipeline has an output connected to a respective tap of the corresponding FIR filter. In the second and third stages, the taps on the FIR filters receive data samples consisting of a real data sample from the I pipeline and/or an imaginary data sample from the Q pipeline. These complex data samples are multiplied by complex filter coefficients and the products are summed to form a respective filtered data sample output for each stage.
REFERENCES:
patent: 5345426 (1994-09-01), Lipschutz
patent: 5345939 (1994-09-01), Engeler et al.
patent: 5437281 (1995-08-01), Lin et al.
patent: 5482004 (1996-01-01), Lin et al.
patent: 5482044 (1996-01-01), Lin et al.
patent: 5483962 (1996-01-01), Shiba
patent: 5555534 (1996-09-01), Maslak et al.
patent: 5581517 (1996-12-01), Gee et al.
patent: 5621345 (1997-04-01), Lee et al.
patent: 5685308 (1997-11-01), Wright et al.
patent: 5735797 (1998-04-01), Muzilla et al.
Lillegard Gregory A.
Miller Steven C.
Milon Daniel
Flaherty Dennis M.
General Electric Company
Imam Ali
Jaworski Francis
Pilarski John H.
LandOfFree
Method and apparatus for complex bandpass filtering and decimati does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for complex bandpass filtering and decimati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for complex bandpass filtering and decimati will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-32773