TY  - JOUR
A1  - Streun, M.
A1  - Brandenburg, G.
A1  - Larue, H.
A1  - Zimmermann, E.
A1  - Ziemons, Karl
A1  - Halling, H.
T1  - Pulse recording by free-running sampling
JF  - IEEE Transactions on Nuclear Science
N2  - Pulses from a position-sensitive photomultiplier (PS-PMT) are recorded by free-running ADCs at a sampling rate of 40 MHz. A four-channel acquisition board has been developed which is equipped with four 12-bit ADCs connected to one field programmable gate array (FPGA). The FPGA manages data acquisition and the transfer to the host computer. It can also work as a digital trigger, so a separate hardware trigger can be omitted. The method of free-running sampling provides a maximum of information, besides the pulse charge and amplitude also pulse shape and starting time are contained in the sampled data. This information is crucial for many tasks such as distinguishing between different scintillator materials, determination of radiation type, pile-up recovery, coincidence detection or time-of-flight applications. The absence of an analog integrator allows very high count rates to be dealt with. Since this method is to be employed in positron emission tomography (PET), the position of an event is also important. The simultaneous readout of four channels allows localization by means of center-of-gravity weighting. First results from a test setup with LSO scintillators coupled to the PS-PMT are presented here
Y1  - 2001
SN  - 0018-9499
VL  - 48
IS  - 3
SP  - 524
EP  - 526
ER  - 
TY  - JOUR
A1  - Stulpe, Werner
A1  - Swat, Maciej
T1  - Quantum States as Probability Measures
JF  - Foundations of Physics Letters. 14 (2001), H. 3
Y1  - 2001
SN  - 1572-9524
SP  - 285
EP  - 293
ER  - 
TY  - JOUR
A1  - Kotliar, Konstantin
A1  - Svetlova, O. V.
A1  - Zinoviewa, N. V.
A1  - Krylova, I. S.
T1  - Elaboration of the conception of the biomechanical model of the aqueous intraocular outflow / Svetlova, O. V. ; Zinoviewa, N. V. ; Krylova, I. S. ; Koshitz, I. N. ; Smolnikov, B. A. ; Fedorova, E. M. ; Kotliar, K. E.
JF  - Rossiiskii zhurnal biomekhaniki = Russian Journal of biomechanics. 5 (2001), H. 3
Y1  - 2001
SN  - 1812-5123
SP  - 23
EP  - 27
PB  - -
ER  - 
TY  - JOUR
A1  - Hillen, Walter
A1  - Unglauben, F.
A1  - Murdfield, M.
T1  - Study of Database Connections for a Java Medical Image Viewer. Unglauben, F.; Hillen, W.; Murdfield, M.
JF  - Intelligente, innovative Produktentwicklung  für  die  industrielle  Praxis. Blümel, Bernd; Stenzel, Horst [Hrsg.]
Y1  - 2001
N1  - Forschungsverbund Multimedia an Fachhochschulen in Nordrhein-Westfalen
SP  - 29
EP  - 33
PB  - Forschungverbund Multimedia an Fachhochschulen
CY  - Köln
ER  - 
TY  - JOUR
A1  - Dikta, Gerhard
T1  - Weak Representation of the Cumulative Hazard Function under Semiparametric Random Censorship Models
JF  - Statistics. 35 (2001), H. 4
Y1  - 2001
SN  - 0233-1888
SP  - 395
EP  - 410
ER  -