Treatment of absorption errors in computerized tomography

Patent · Mon Mar 27 23:00:00 EST 1978

OSTI ID:7277135

Froggatt, R J

A computerized tomographic apparatus is disclosed, as well as a method of operating such apparatus. In circumstances where collimation between the body under examination and the radiation-sensitive detector means is difficult to apply, errors in evaluated absorption coefficients for locations distributed over a cross-sectional slice of the body due to scatter within the slice are reduced by producing a first estimate of the distribution of said absorption coefficients, using this estimate to obtain an indication of the amount of scatter likely to arise from the various locations when irradiated along different paths and using such indication to effect scatter compensation.

• Assignee: EMI Ltd.
• Patent Number(s): US 4081681
• OSTI ID: 7277135
• Country of Publication: United States
• Language: English

Related Subjects

550600* -- Medicine
560151 -- Radiation Effects on Animals-- Man
62 RADIOLOGY AND NUCLEAR MEDICINE
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
BODY
CAT SCANNING
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ERRORS
IONIZING RADIATIONS
PHOTON TRANSMISSION SCANNING
RADIATIONS
SCATTERING
TOMOGRAPHY
X RADIATION