The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1977
Filed:
Jan. 28, 1976
Gunter Kowalski, Hamburg, DT;
U.S. Philips Corporation, New York, NY (US);
Abstract
In computerized tomographic scanning systems it is desirable to reduce the scanning time required. Therefore, it is desirable that the radiation source/radiation detector system not be stopped and subsequently accelerated again for each absorption measurement. The present system continuously rotates and the source is continuously turned on, the output signal of each radiation detector being applied via a low-pass filter to a sample-and-hold circuit having a sampling frequency which is about twice as high as the limit frequency of the low-pass filter. Better accuracy is obtained than with known scanners having discontinuous movement or a flashing radiation source.