TY - GEN
T1 - A computing efficient PET time calibration method based on pseudoinverse matrices
AU - Mann, Alexander B.
AU - Paul, Stephan
AU - Tapfer, Arne
AU - Spanoudaki, Virginia C.
AU - Ziegler, Sibylle I.
PY - 2009
Y1 - 2009
N2 - The presented algorithms provide a simple and easy to implement way to obtain a least squares solution to the problem of PET time calibration. For the well determined geometry setups described previously, this avoids the computing intense singular value decomposition and provides directly the pseudoinverse matrix, based on the system channel numbers. This allows to realize fast and compact solver codes for the evaluation of the time calibration problem given in Equations (1) and (2). To achieve optimal calibration results for the overall system wide time resolution, ideally, both direct and indirect calibration methods should be used together. The direct but slow time reference probe measurement can therefore determine initial calibration delay values, which can then be tuned with short-term flood-source measurements in combination with the described indirect calibration procedures.
AB - The presented algorithms provide a simple and easy to implement way to obtain a least squares solution to the problem of PET time calibration. For the well determined geometry setups described previously, this avoids the computing intense singular value decomposition and provides directly the pseudoinverse matrix, based on the system channel numbers. This allows to realize fast and compact solver codes for the evaluation of the time calibration problem given in Equations (1) and (2). To achieve optimal calibration results for the overall system wide time resolution, ideally, both direct and indirect calibration methods should be used together. The direct but slow time reference probe measurement can therefore determine initial calibration delay values, which can then be tuned with short-term flood-source measurements in combination with the described indirect calibration procedures.
UR - http://www.scopus.com/inward/record.url?scp=77951189095&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2009.5401925
DO - 10.1109/NSSMIC.2009.5401925
M3 - Conference contribution
AN - SCOPUS:77951189095
SN - 9781424439621
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 3889
EP - 3892
BT - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
T2 - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
Y2 - 25 October 2009 through 31 October 2009
ER -