US 4,803,714 AGranted

Method for forming a radiogram using slit-scanning radiographic techniques

AssigneeB. V. Optische Industrie "De Oude Delft"

InventorHugo Vlasbloem

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Abstract

There is disclosed a method for forming a radiogram of an object comprising the steps of energizing an X-ray source at a low level of radiation intensity wherein the X-ray source includes a slit diaphragm, pivoting the X-ray source during a first scanning of the object, moving an elongated X-ray detector in respect to the pivoting of the X-ray source to generate an output signal of intensity of the object during the first scanning thereof, measuring the output signal during at least a portion of said first scanning, energizing the X-ray source to a higher level of radiation intensity as determined by the output signal from the X-ray detector during the first scanning, pivoting the X-ray source during a second scanning of the object, moving the X-ray detector during the second scanning to generate a second output of radiation intensity and forming a radiogram from the second output signals.

Claims1

Dependent claims

A method for forming a radiogram of an object, which comprises the steps of:

(a) energizing an X-ray source to a low level of radiation intensity, said X-ray source including a slit diaphragm;
(b) pivoting said X-ray source during a first scanning of said object;
(c) moving an elongated X-ray detector along a position corresponding to a position of said X-ray source during said first scanning thereby to generate output signals of radiation intensity;
(d) measuring said output signals during at least a portion of said first scanning;
(e) energizing said X-ray source to a higher level of radiation intensity as determined by step (d) to form a radiogram;
(f) pivoting said X-ray source during a second scanning of said object at said higher level of radiation intensity;
(g) moving said elongated X-ray detector along said position corresponding to said position of said X-ray source during said second scanning thereby to generate second output signals of radiation intensity;
and
(h) forming said radiogram from said second output signals.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/648,707Filed 7 Sep 1984
Priority: NL 830315613 Sep 1983
Granted: 7 Feb 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61B 6/4476
Constructional features of apparatus for radiation diagnosis: related to motor-assisted motion of the source unit
A61B 6/06
Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment: diaphragms
H05G 1/58
Electrical details: switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from…
A61B 6/548
Control of apparatus or devices for radiation diagnosis: remote control of the apparatus or devices