Title: Apparatus for examining objects by means of penetrating radiation

Abstract: Apparatus for examining a human patient by means of penetrating radiation has a source of radiation for producing a sectoral swath of radiation which traverses a planar slice of the patient and is then measured by a bank of detectors each of which is sensitive to a narrow beam of the radiation in said swath. The swath of radiation is produced by a rotating anode Coolidge tube and means are provided for monitoring the radiation intensity at spaced positions across the width of the swath and for taking account of variations of the intensity in the output signals derived from the detectors. Preferably radiation emitted from the anode at near tangential directions is selected to form the swath.

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Inventors: Hounsfield, Godfrey Newbold (Newark, EN)

Application Number: 474767
Filing Date: 1974-05-30
Publication_date: 1976-02-24
Assignee: E M I Limited (Hayes, EN)
Primary Class(es): 378/5 378/901, 976/DIG435
Other Classes:
US Patent Ref:

3134903	May, 1964	Fengler	250/510.
3432657	Mar, 1969	Slavin	250/359.
3737660	Jun, 1973	Ando et al.	250/445.
3755672	Aug, 1973	Edholm et al.	250/510.

Other Refs:
Primary Examiner: Borchelt, Archie R.
Assistant Examiner:
Attorney: Fleit & Jacobson