Uptake pattern of [68Ga]Ga-DOTA-NOC in tissues: implications for inflammatory diseases.
Journal
The quarterly journal of nuclear medicine and molecular imaging : official publication of the Italian Association of Nuclear Medicine (AIMN) [and] the International Association of Radiopharmacology (IAR), [and] Section of the Society of...
ISSN: 1827-1936
Titre abrégé: Q J Nucl Med Mol Imaging
Pays: Italy
ID NLM: 101213861
Informations de publication
Date de publication:
Jun 2022
Jun 2022
Historique:
pubmed:
14
12
2019
medline:
20
5
2022
entrez:
14
12
2019
Statut:
ppublish
Résumé
[68Ga]Ga-DOTA-NOC binds to somatostatin receptor (SSTR) subtypes 2 and 5, also expressed on lymphocytes and macrophages, but no information is available about uptake in tissues that might be affected by a chronic inflammatory process. Our aim was to obtain normal reference values for: [68Ga]Ga-DOTA-NOC uptake in tissues prone to chronic inflammation. Retrospective study in 81 patients who performed the scan for a suspicion of neuroendocrine tumor (NET). We analyzed major joints, salivary glands, thyroid, aortic wall from images acquired after injection of 173.9±1 Mbq of: [68Ga]Ga-DOTA-NOC. We calculated the SUV<inf>max</inf> and SUV<inf>target</inf>/SUV<inf>gluteus</inf> ratio or SUV<inf>target</inf>/SUV<inf>aorta</inf> ratio. Data are reported as mean±2 or ±3 standard deviations (SD). SUV<inf>max</inf> values appeared more reliable than other ratios. In thyroid we found a mean SUV<inf>max</inf> of 1.36±0.45, with no values >3SD; in parotid glands 0.98±0.40, with 2 values >3SD; in submandibular glands 0.99±0.37, with 2 values >3SD; in aortic arch 1.71±0.50, with 1 value >3SD; in thoracic aorta 2.03±0.52, with 1 value >3SD; in abdominal aorta 2.19±0.49, with no value >3SD; in shoulders 0.92±0.31 and in hips 0.87±0.34, with 2 and 4 values >3SD, respectively. These 12 values with SUV<inf>max</inf> >3SD, belong to 5 patients, 3 of which had signs of xerostomia and/or arthritis. A statistically significant correlation was observed between SUV<inf>max</inf> and age in all examined tissues but in the aorta. Tissues in which lymphocytic infiltration may occur show that SUV<inf>max</inf> is tissue-dependent. Within tissue variability, an SUV<inf>max</inf> greater than the mean +3SD is rarely found amongst patients without a symptomatic chronic inflammatory process but, when found, may highlight a chronic inflammatory condition.
Sections du résumé
BACKGROUND
BACKGROUND
[68Ga]Ga-DOTA-NOC binds to somatostatin receptor (SSTR) subtypes 2 and 5, also expressed on lymphocytes and macrophages, but no information is available about uptake in tissues that might be affected by a chronic inflammatory process. Our aim was to obtain normal reference values for: [68Ga]Ga-DOTA-NOC uptake in tissues prone to chronic inflammation.
METHODS
METHODS
Retrospective study in 81 patients who performed the scan for a suspicion of neuroendocrine tumor (NET). We analyzed major joints, salivary glands, thyroid, aortic wall from images acquired after injection of 173.9±1 Mbq of: [68Ga]Ga-DOTA-NOC. We calculated the SUV<inf>max</inf> and SUV<inf>target</inf>/SUV<inf>gluteus</inf> ratio or SUV<inf>target</inf>/SUV<inf>aorta</inf> ratio. Data are reported as mean±2 or ±3 standard deviations (SD).
RESULTS
RESULTS
SUV<inf>max</inf> values appeared more reliable than other ratios. In thyroid we found a mean SUV<inf>max</inf> of 1.36±0.45, with no values >3SD; in parotid glands 0.98±0.40, with 2 values >3SD; in submandibular glands 0.99±0.37, with 2 values >3SD; in aortic arch 1.71±0.50, with 1 value >3SD; in thoracic aorta 2.03±0.52, with 1 value >3SD; in abdominal aorta 2.19±0.49, with no value >3SD; in shoulders 0.92±0.31 and in hips 0.87±0.34, with 2 and 4 values >3SD, respectively. These 12 values with SUV<inf>max</inf> >3SD, belong to 5 patients, 3 of which had signs of xerostomia and/or arthritis. A statistically significant correlation was observed between SUV<inf>max</inf> and age in all examined tissues but in the aorta.
CONCLUSIONS
CONCLUSIONS
Tissues in which lymphocytic infiltration may occur show that SUV<inf>max</inf> is tissue-dependent. Within tissue variability, an SUV<inf>max</inf> greater than the mean +3SD is rarely found amongst patients without a symptomatic chronic inflammatory process but, when found, may highlight a chronic inflammatory condition.
Identifiants
pubmed: 31833738
pii: S1824-4785.19.03178-9
doi: 10.23736/S1824-4785.19.03178-9
doi:
Substances chimiques
Heterocyclic Compounds, 1-Ring
0
Organometallic Compounds
0
1,4,7,10-tetraazacyclododecane- 1,4,7,10-tetraacetic acid
1HTE449DGZ
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM