Method and structure for optimizing radiographic quality by controlling x-ray tube voltage, current, focal spot size and exposure time

Patent · Tue Aug 09 04:00:00 EDT 1988

OSTI ID:6486733

Yanaki, N E

This patent describes a method for optimizing an X-ray image from an X-ray apparatus comprising: an X-ray tube having a cathode which emits electrons and an anode on which the electrons impinge and which is a source of X-rays, the tube having an operating voltage which is the voltage drop between the anode and the cathode, a tube current which is the current between the anode and the cathode, and a focal spot size which is the area of the anode on which the electrons impinge, and in which the voltage, the current and the focal spot size have initial settings; a collimator having an opening through which the X-rays leaving the source in the direction of the opening may pass; means for holding tissue to be examined in position for being irradiated; means for showing an image of X-rays which have passed through the tissue; at least one sensor which generates sensor signals for detecting radiation passed through the tissue and through the means for showing an image, and for calibrating the X-ray apparatus; and means for receiving the sensor signals from at least one sensor and based on the sensor signals sending control signals which control the operating voltage.

• Assignee: NOV; NOV-89-034379; EDB-89-027943
• Patent Number(s): US 4763343
• OSTI ID: 6486733
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMAL TISSUES
BIOMEDICAL RADIOGRAPHY
BODY
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL SYSTEMS
CURRENTS
DIAGNOSTIC TECHNIQUES
DIAGNOSTIC USES
DOSE RATES
ELECTRIC CURRENTS
ELECTRON TUBES
EQUIPMENT
FOCUSING
IMAGE PROCESSING
IMAGE TUBES
MEDICINE
NUCLEAR MEDICINE
OPTIMIZATION
PROCESSING
QUALITY CONTROL
RADIOLOGY
TISSUES
USES
VOLTAGE REGULATORS
X-RAY EQUIPMENT
X-RAY TUBES