Emission computed tomography apparatus

Patent · Tue Oct 06 04:00:00 EDT 1987

OSTI ID:5767382

Fujiki, Y

An emission computed tomography apparatus is described for providing a tomogram image of a patient containing a dosage of radioisotope comprising: a couch for supporting the patient; a two-dimension detector for collecting data concerning the distribution of the radioisotope in the patient. The detector has an effectual visual field of length Y/sub D/ along the longitudinal axis of the couch; means for rotating the detector about the longitudinal axis of the couch in a series of N incremental angular steps; driving means for moving the detector relative to the longitudinal axis of the couch a given distance after each incremental angular step rotation of the detector. The sum of the given distances for the N incremental angular steps is less than Y/sub D/. For each incremental angular step any given slice of the patient is interrogated by a different portion of the detector to thereby minimize the generation of artifacts by the detector; position signal correction means for correcting the data from the detector as a function of the given distance of relative movement between the detector and the longitudinal axis of the couch; and means for constructing a tomogram image of the patient in response to the corrected output data.

• Assignee: Kabushiki Kaisha Toshiba, Kawasaki
• Patent Number(s): US 4698506
• OSTI ID: 5767382
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
COMPUTERIZED TOMOGRAPHY
CORRECTIONS
COUNTING TECHNIQUES
DATA ACQUISITION SYSTEMS
DESIGN
DIAGNOSTIC TECHNIQUES
EMISSION COMPUTED TOMOGRAPHY
IMAGE PROCESSING
IMAGES
INCIDENCE ANGLE
MEASURING INSTRUMENTS
MOTION
PATIENTS
POSITIONING
PROCESSING
RADIATION DETECTORS
RADIOISOTOPE SCANNERS
RADIOISOTOPE SCANNING
ROTATION
SIGNAL CONDITIONING
SIGNALS
TOMOGRAPHY