Surgery – Truss – Pad
Patent
1995-04-18
1996-02-13
Manuel, George
Surgery
Truss
Pad
A61B 800
Patent
active
054905109
ABSTRACT:
A diagnostic ultrasound apparatus includes an ultrasound probe for transmitting and receiving ultrasound waves to and from a patient to obtain echo data of the patient, an echo data memory in which the echo data are to be written by being identified with addresses S, B represented by a polar coordinate system, a frame memory in which the echo data read out from the echo data memory are to be written according to first addresses X, Y represented by a rectangular coordinate system, and an address generator for sequentially generating the first addresses X, Y which are used when the echo data are written into the frame memory. The apparatus further includes an address converting section for converting the addresses X, Y generated by the address generator into the polar coordinate addresses R, .theta.. The address conversion is carried out based upon addresses x, y of a representative quadrant which is one of a plurality of quadrants of a second rectangular coordinate system which is obtained by converting the first rectangular coordinate system so as to correspond to the polar coordinate system, and quadrant discriminating information which discriminates which of the plurality of quadrants the representative quadrant belongs to. As a result, the echo data are read out from the echo data memory in accordance with the converted polar coordinate addresses R, .theta. which are supplied from the address converting section, and thus readout echo data are written into the frame memory. Therefore, in this apparatus, since the address conversion from the addresses X, Y to the addresses R, .theta. is performed based upon the addressed x, y of the representative quadrant and the quadrant discriminating information extracted from the X, Y addresses, the storage capacity of the address conversion table can be greatly reduced
REFERENCES:
patent: 5199437 (1993-04-01), Langberg
patent: 5211169 (1993-05-01), Freeland
patent: 5257629 (1993-11-01), Kitney et al.
Aloka Co., Ltd.
Manuel George
LandOfFree
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