{"entity":{"id":"ge68-ga68-generators","kind":"technology","name":"Germanium-68/gallium-68 generators","aka":["68Ge/68Ga generator","GalliaPharm"],"tldr":"A compact column loaded with a long-lasting parent isotope lets a PET radiopharmacy produce fresh gallium-68, used in scans such as PSMA and DOTATATE PET, on demand without needing a cyclotron.","summary":"The 68Ge/68Ga generator holds parent germanium-68 (half-life 270.8-271 days) fixed on a solid-phase column, commonly TiO2, SiO2, SnO2 or hydrous stannic-oxide-type matrices, and yields daughter gallium-68 (half-life 67.7-68 minutes) by elution with dilute hydrochloric acid (typically 0.05-0.1 M HCl). Because 68Ge has a nine-month half-life, a single generator supplies clinically useful 68Ga for roughly a year, sufficient for hundreds of elutions, without requiring an on-site cyclotron. Regulatory eluate specifications (Ph. Eur. monograph 2464) require 68Ge breakthrough of no more than 0.001% of eluted activity; generators are typically eluted at least once per working day and pre-eluted with 5x4-10 mL washes after breaks of 72-96 hours to keep breakthrough within limits.\n\nEluate volumes (4-10 mL) are usually too dilute for direct high-specific-activity radiolabelling, so cation- or anion-exchange fractionation/concentration steps are commonly used before adding the eluate to a peptide precursor (for example DOTATATE or PSMA-11) at 90-95°C for 10-20 minutes to form the 68Ga complex. In routine operation, elution yields around 60-85% of theoretical maximum activity have been reported over hundreds of elutions per generator-year, with radiochemical purity of finished 68Ga-DOTATOC/68Ga-PSMA products typically exceeding 95-99%. The approach underlies most 68Ga-DOTATATE (NETSPOT-type kits) and 68Ga-PSMA-11 production worldwide and is complementary to cyclotron-based 68Ga production, which is increasingly used where generator throughput or supply is constrained.","asOf":"2026-09-22","links":[{"label":"EMA EPAR: GalliaPharm 68Ge/68Ga generator public assessment report","url":"https://www.ema.europa.eu/en/documents/assessment-report/galliapharm-epar-public-assessment-report_en.pdf"},{"label":"Good practices for 68Ga radiopharmaceutical production (EJNMMI Radiopharm. Chem. 2022)","url":"https://link.springer.com/article/10.1186/s41181-022-00180-1"},{"label":"The 68Ge/68Ga generator for enhancing productivity: multi-year performance data (PMC 2026)","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC13096388/"}],"tags":["generator","gallium-68","PET"],"related":["sstr-pet","psma-pet","cyclotron-isotope-production","radionuclide-generators-kits","ga-68","ge-68"],"indications":[],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":["cold-kit-formulation"],"notes":[],"principle":"The nine-month half-life parent germanium-68 is fixed on a solid-phase column (titanium, tin or silicon oxide); eluting the column with dilute hydrochloric acid selectively washes off the freshly formed gallium-68 daughter while germanium-68 stays bound, so the same column keeps supplying fresh gallium-68 for about a year without needing a cyclotron on site.","strengths":[],"limitations":[],"since":"First 68Ge/68Ga generator systems developed in 1961; modern GMP-grade generators from the 2000s-2010s"},"route":"/technologies/ge68-ga68-generators/","neighbours":{"technology":[{"id":"cold-kit-formulation","kind":"technology","name":"Cold kit formulation","route":"/technologies/cold-kit-formulation/"},{"id":"cyclotron-isotope-production","kind":"technology","name":"Cyclotron isotope production (F-18, Ga-68, Cu-64, Zr-89, At-211)","route":"/technologies/cyclotron-isotope-production/"},{"id":"psma-pet","kind":"technology","name":"PSMA PET","route":"/technologies/psma-pet/"},{"id":"radionuclide-generators-kits","kind":"technology","name":"Radionuclide generators and cold kits","route":"/technologies/radionuclide-generators-kits/"},{"id":"sstr-pet","kind":"technology","name":"Somatostatin receptor PET (68Ga/64Cu-DOTATATE)","route":"/technologies/sstr-pet/"}],"isotope":[{"id":"ga-68","kind":"isotope","name":"Gallium-68","route":"/isotopes/ga-68/"},{"id":"ge-68","kind":"isotope","name":"Germanium-68","route":"/isotopes/ge-68/"}]}}