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June 1986 Volume 37 • Number 6
Articles
A Integrated Circuit Procedural Language, by Jeffrey A. Lewis, Andrew A. Berlin, Allan
T J. Kuchinsky, and Paul K. Yip This in-house Lisp-based VLSI design tool accommodates
different fabrication processes and functional cells with variable characteristics.
8 Knowledge-Assisted Design and the Area Estimation Assistant
1-4 Software Development for Just-in-Time Manufacturing Planning and Control, by
Ã- Raj Robert This Ten L. Lombard!, Alvina Y. Nishimoto, and Robert A. Passe// This
software product provides streamlined management information for the just-in-time environment.
13 Comparing Manufacturing Methods
18
Authors
The Role of Doppler Ultrasound in Cardiac Diagnosis, by Raymond G. O'Connell, Jr.
Data shift blood flow anomalies can be obtained by observing the shift in frequency of
ultrasonic imaging pulse echoes.
Doppler Effect: History and Theory, by Paul A. Magnin The shift in the frequency of
sound for moving sources and/or listeners is described with its application for medical
analysis.
27 Johann Christian Doppler
O H Power and Intensity Measurements for Ultrasonic Doppler Imaging Systems, by
I James body Carefully controlling the acoustic energy transmitted into the human body
requires accurate analysis methods.
O £- Extraction of Blood Flow Information Using Doppler-Shifted Ultrasound, by Leslie I.
O O Halberg and Karl E. Thiele Frequency shifts in ultrasonic echoes are detected by means
of specially designed filters and a quadrature sampler.
37 Continuous-Wave Doppler Board
39 Observation of Blood Flow and Doppler Sample Volume
A -4 Modifying an Ultrasound Imaging Scanner for Doppler Measurements, by Sydney M.
I Karp Changes in timing, more precise focusing, processing enhancements, and powerlimiting software had to be developed.
A f- Digital Processing Chain for a Doppler Ultrasound Subsystem, by Barry F. Hunt,
rO Steven C. Leavitt, and David C. Hempstead Time-domain quadrature samples are con
verted into a gray-scale spectral frequency display using a fast Fourier transform, moment calcu
lations, and digital filtering.
Editor. Richard Supervisor, Dolan • Associate Editor, Business Manager, Kenneth A Shaw • Assistant Editor, Nancy R- Teater • Art Director, Photographer. Arvid A. Danielson • Support Supervisor, Susan E Wright
Illustrator, Nancy Contreras • Administrative Services, Typography, Anne S. LoPresti • European Production Supervisor, Michael Zandwijken
© Hewlett-Packard Company 1986 Printed in U.S.A.
2 HEWLETT-PACKARD JOURNAL JUNE 1986
© Copr. 1949-1998 Hewlett-Packard Co.