Title :
A customized motion acquisition circuit for image deblurring in positron emission tomography
Author :
Mawlawi, Osama R. ; Miodownik, Saul ; Leonard, Edward F. ; DiResta, Gene R. ; Larson, Steven M.
Author_Institution :
Nucl. Med. Service, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
A digital electronic circuit was designed to calculate the exact two-dimensional position of markers in the field of view of a charged-coupled device (CCD) camera. The circuit is composed of four building blocks: (1) a video sync separator, (2) two banks of counters to calculate the horizontal (X) and vertical (Y) position of each marker, (3) a threshold discriminator, and (4) a buffer/memory bank that holds the position information for eventual communication with a personal computer (PC). The circuit is interfaced to the PC via its parallel port and an I/O card for control and data communication. Testing of the circuit revealed that it is capable of achieving a spatial resolution of 1.2 mm along with a temporal resolution of 15 Hz for a camera field of view of 16×11.5 cm
Keywords :
CCD image sensors; image resolution; image restoration; medical image processing; motion compensation; positron emission tomography; video signal processing; CCD camera field of view; PC-interfaced; banks of counters; buffer/memory bank; camera/raster scanning; control and data communication; customized motion acquisition circuit; digital electronic circuit; exact 2D position of markers; horizontal position; image deblurring; motion detection; motion tracking; positron emission tomography; spatial resolution; temporal resolution; threshold discriminator; vertical position; video sync separator; Charge coupled devices; Charge-coupled image sensors; Circuit testing; Counting circuits; Digital cameras; Electronic circuits; Image restoration; Microcomputers; Particle separators; Spatial resolution;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
