Dynamic SPECT in two healthy volunteers to determine the optimal time for in vivo D2 dopamine receptor imaging with 123I-IBZM using the rotating gamma camera.
Dynamic SPECT was performed in two healthy male volunteers with a single slice brain dedicated camera (Strichman Medical Equipment 810, first study) and a rotating gamma camera (Siemens Dual Rota ZLC37, second study) to obtain information about the optimal imaging time for the dopamine D2 receptor specific ligand 123I-(S)-(-)-2-hydroxy-3-iodo-6-methoxy-N[(1-ethyl-2-pyrrolidinyl) methyl]-benzamide (123I-IBZM). Count rates in the basal ganglia and in several cerebral cortical regions were used to define specific and aspecific binding, respectively. On the basis of the first study, 90-150 min seemed the optimal time for rotating gamma camera 123I-IBZM-SPECT. On the basis of the second study the optimal period was considered to be 60-120 min. It is recommended to apply the same imaging time after injection in a protocol to all patients and volunteers as otherwise a comparison may not be reliable.
Verhoeff
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NP
Academic Medical Centre, Department of Nuclear Medicine, Amsterdam, Zuidoost, The Netherlands.
Brücke
T
T
Podreka
I
I
Bobeldijk
M
M
Angelberger
P
P
Van Royen
E A
EA
D000328:Adult; D001549:Benzamides; D006801:Humans; D008297:Male; D011759:Pyrrolidines; D011954:Receptors, Dopamine; D017448:Receptors, Dopamine D2; D012016:Reference Values; D013997:Time Factors; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation / Q000379:methods*
D001549:Benzamides; D011759:Pyrrolidines; D011954:Receptors, Dopamine; D017448:Receptors, Dopamine D2; C055743:3-iodo-2-hydroxy-6-methoxy-N-((1-ethyl-2-pyrrolidinyl)methyl)benzamide