Title :
Methods for improving image quality in whole body PET scanning
Author :
Dahlbom, Magnus ; Yu, Dan-Chu ; Cherry, Simon R. ; Chatziioannou, Arion ; Hoffman, Edward J.
Author_Institution :
Dept. of Radiol. Services, Sch. of Med., California Univ., Los Angeles, CA, USA
fDate :
8/1/1992 12:00:00 AM
Abstract :
The authors discuss optimization of some of the scanning parameters for whole-body positron emission tomography (PET) imaging to achieve best possible image quality. The detection efficiency of the PET system can be improved by using more coincidence plane combinations in addition to the conventional direct and cross planes. The effect of acquiring an additional set of coincidence planes with a plane separation of ±2 was studied and showed a reduction in noise and improved uniformity without a significant loss in resolution. The effect of different sampling schemes were also studied. Using a continuous sampling scheme by moving the bed in steps equal to half the plane separation resulted in better image uniformity and a reduction in noise in comparison with images acquired using the standard interleaved sampling mode
Keywords :
computerised tomography; radioisotope scanning and imaging; coincidence plane combinations; continuous sampling scheme; detection efficiency; image quality; interleaved sampling mode; resolution; whole-body positron emission tomography; Biomedical imaging; Detectors; Image quality; Image sampling; Noise figure; Noise level; Noise reduction; Nuclear medicine; Tomography; Whole-body PET;
Journal_Title :
Nuclear Science, IEEE Transactions on
