Abstract:
BACKGROUND:At clinical scintigraphic examinations of the abdomen using single photon emission computed tomography (SPECT), we have observed a different distribution between the left and right main liver lobes of various radiopharmaceuticals. This was studied retrospectively in clinical patients. METHODS:Examinations with [123I]-metaiodobenzylguanidine MIBG; (n=19), a 99mTc-labelled monoclonal antibody against granulocytes (n=18), and 111In-pentetreotide (n=26) were assessed. There was no known history of, or risk factor for liver disease, and all lobes showed a uniform activity distribution. Twenty healthy volunteers underwent consecutive examinations with 99mTc-dimethyliminodiacetic acid (HIDA). The activity ratios between the left and right main liver lobes were calculated from the transverse tomographic (SPECT) sections. RESULTS:The left: right lobar activity ratio for [123I]-MIBG was (mean+/-SD) 1.25+/-0.21 (null hypothesis=1.00; P<0.001); for the antibody, acquisition after 3-5 h was 0.98+/-0.06 (NS) and after 20-24 h, 0.99+/-0.11 (NS); for 111In-pentetreotide, 0.90+/-0.09 (P<0.001); for 99mTc-HIDA, immediate acquisition, 0.68+/-0.12 (P<0.001) and acquisition at 7 min, 0.66+/-0.12 (P<0.001). CONCLUSIONS:The differences in tracer uptake between the liver lobes cannot be caused only by differences in blood flow. One explanation of the higher uptake of [123I]-MIBG by the left lobe may be a greater presence of catecholamines and a higher sympathetic nerve density in this liver portion. Consequently, there may be a functional difference between the two main liver lobes.
journal_name
J Gastroenteroljournal_title
Journal of gastroenterologyauthors
Jacobsson H,Jonas E,Hellström PM,Larsson SAdoi
10.1007/s00535-005-1617-9subject
Has Abstractpub_date
2005-07-01 00:00:00pages
733-8issue
7eissn
0944-1174issn
1435-5922journal_volume
40pub_type
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