68Ga-PSMA PET/CT in the evaluation of bone metastases in prostate cancer
PurposeThe aims of this retrospective analysis were to compare 68Ga-PSMA PET findings and low-dose CT findings (120 kV, 30 mA), and to obtain semiquantitative and quantitative 68Ga-PSMA PET data in patients with prostate cancer (PC) bone metastases.MethodsIn total, 152 PET/CT scans from 140 patients...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
23 January 2018
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| In: |
European journal of nuclear medicine and molecular imaging
Year: 2018, Volume: 45, Issue: 6, Pages: 904-912 |
| ISSN: | 1619-7089 |
| DOI: | 10.1007/s00259-018-3936-0 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1007/s00259-018-3936-0
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| Author Notes: | Christos Sachpekidis, P. Bäumer, K. Kopka, B. A. Hadaschik, M. Hohenfellner, A. Kopp-Schneider, U. Haberkorn, A. Dimitrakopoulou-Strauss |
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| 245 | 1 | 0 | |a 68Ga-PSMA PET/CT in the evaluation of bone metastases in prostate cancer |c Christos Sachpekidis, P. Bäumer, K. Kopka, B. A. Hadaschik, M. Hohenfellner, A. Kopp-Schneider, U. Haberkorn, A. Dimitrakopoulou-Strauss |
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| 520 | |a PurposeThe aims of this retrospective analysis were to compare 68Ga-PSMA PET findings and low-dose CT findings (120 kV, 30 mA), and to obtain semiquantitative and quantitative 68Ga-PSMA PET data in patients with prostate cancer (PC) bone metastases.MethodsIn total, 152 PET/CT scans from 140 patients were evaluated. Of these patients, 30 had previously untreated primary PC, and 110 had biochemical relapse after treatment of primary PC. All patients underwent dynamic PET/CT scanning of the pelvis and lower abdomen as well as whole-body PET/CT with 68Ga-PSMA-11. The PET/CT scans were analysed qualitatively (visually), semiquantitatively (SUV), and quantitatively based on a two-tissue compartment model and a noncompartmental approach leading to the extraction of the fractal dimension. Differences were considered significant for p values <0.05.ResultsIn total, 168 68Ga-PSMA-positive and 113 CT-positive skeletal lesions were detected in 37 patients (8 with primary PC, 29 with biochemical recurrence). Of these 168 lesions, 103 were both 68Ga-PSMA PET-positive and CT-positive, 65 were only 68Ga-PSMA-positive, and 10 were only CT-positive. The Yang test showed that there were significantly more 68Ga-PSMA PET-positive lesions than CT-positive lesions. Association analysis showed that PSA plasma levels were significantly correlated with several 68Ga-PSMA-11-associated parameters in bone metastases, including the degree of tracer uptake (SUVaverage and SUVmax), its transport rate from plasma to the interstitial/intracellular compartment (K1), its rate of binding to the PSMA receptor and its internalization (k3), its influx rate (Ki), and its distribution heterogeneity.Conclusion68Ga-PSMA PET/CT is a useful diagnostic tool in the detection of bone metastases in PC. 68Ga-PSMA PET visualizes more bone metastases than low-dose CT. PSA plasma levels are significantly correlated with several 68Ga-PSMA PET parameters. | ||
| 650 | 4 | |a 68Ga-PSMA PET/CT | |
| 650 | 4 | |a Prostate cancer bone metastases | |
| 650 | 4 | |a PSA | |
| 650 | 4 | |a SUV | |
| 650 | 4 | |a Two-tissue compartment model | |
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