Sampled data CT system including analog filter and compensating digital filter

Patent · Tue Nov 19 04:00:00 EST 1985

OSTI ID:5732754

Glover, G H; DallaPiazza, D G; Pelc, N J

A CT scanner in which the amount of x-ray information acquired per unit time is substantially increased by using a continuous-on x-ray source and a sampled data system with the detector. An analog filter is used in the sampling system for band limiting the detector signal below the highest frequency of interest, but is a practically realizable filter and is therefore non-ideal. A digital filter is applied to the detector data after digitization to compensate for the characteristics of the analog filter, and to provide an overall filter characteristic more nearly like the ideal.

• Assignee: General Electric Company
• Patent Number(s): US 4554633
• OSTI ID: 5732754
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ANALOG SYSTEMS
ANALOG-TO-DIGITAL CONVERTERS
COMPUTERIZED TOMOGRAPHY
DATA PROCESSING
DIAGNOSTIC TECHNIQUES
DIGITAL SYSTEMS
DIGITIZERS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FILTERS
IMAGE PROCESSING
IMAGE SCANNERS
PROCESSING
PULSE CIRCUITS
RADIATION SOURCES
SAMPLERS
SIGNAL CONDITIONERS
SPECIFICATIONS
TOMOGRAPHY
X-RAY EQUIPMENT
X-RAY SOURCES