[18F]FET PET for Differentiating Tumor Progression vs Treatment-Related Changes in Brain Metastases (TLX101-Px)
A Phase 3, Open-label, Single-arm Study to Investigate the Utility of ([18F]FET) PET in Participants With Brain Metastases and Equivocal MRI Findings Following Therapy to Differentiate Between Intracranial Tumor and Treatment-related Changes
This Phase 3 study will evaluate whether [18F]Floretyrosine ([18F]FET) PET imaging can help distinguish active brain tumor growth from treatment-related changes in patients with brain metastases who have unclear MRI findings after treatment. The study has two parts. Part 1 will identify the lowest effective dose of [18F]FET PET that provides reliable imaging results. Part 2 will evaluate the accuracy of [18F]FET PET, using the optimized dose, for distinguishing tumor progression from treatment-related changes. Study results will be compared with information from follow-up imaging, clinical assessments, and, when available, tissue samples obtained during routine clinical care. The goal is to determine whether [18F]FET PET can improve diagnostic accuracy and support clinical decision-making for patients with brain metastases.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Phase 3
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Sahar Khan, Clinical Project Manager, MBA, MS
- Telefonnummer: 2484692985
- E-Mail: sahar.khan@telixpharma.com
Studieren Sie die Kontaktsicherung
- Name: Sapna Shah, Senior Director, Clinical Operations, MD
- E-Mail: sapna.shah@telixpharma.com
Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Adults ≥18 years of age at the time of informed consent.
- Prior diagnosis of brain metastases from a histologically confirmed solid tumor.
- At least one measurable intracranial lesion (≥10 mm longest diameter and/or ≥5 mm short axis) identified on MRI and assessed according to RANO-BM criteria.
- Target lesion considered equivocal for tumor progression versus treatment-related changes on MRI within 1 month prior to Day 1.
- Prior receipt of CNS-directed therapy for brain metastases within 12 months before Day 1.
- Planned standard-of-care management including biopsy/neurosurgical intervention and/or clinical follow-up MRI within 2 to 3 months after Day 1.
- ECOG Performance Status 0-2.
- Life expectancy of at least 3 months.
- Willing and able to provide written informed consent and comply with study procedures.
Exclusion Criteria:
- Serious non-malignant disease that may interfere with study objectives, safety, or compliance.
- Known hypersensitivity to [18F]FET or tyrosine derivatives.
- Ongoing Grade 3 toxicity from previous therapies.
- Exposure to a diagnostic or therapeutic radiopharmaceutical within protocol-specified washout periods.
- Whole brain radiotherapy or stereotactic radiosurgery within 2 months prior to Day 1.
- Exposure to another investigational agent within 30 days prior to Day 1 or participation in a conflicting clinical study.
- Absence of at least one measurable intracranial lesion.
- Contraindication to PET, CT, or MRI procedures.
- Inability to undergo required imaging procedures or comply with study requirements.
- Pregnant or breastfeeding women.
- Any condition that, in the investigator's opinion, would make the participant unsuitable for the study.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Diagnose
- Zuteilung: N / A
- Interventionsmodell: Einzelgruppenzuweisung
- Maskierung: Keine (Offenes Etikett)
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Experimental: Arm Group Label: [18F]FET PET Imaging
|
Floretyrosine F 18 ([18F]FET) is an investigational amino acid positron emission tomography (PET) radiopharmaceutical administered as a single intravenous injection for diagnostic imaging. Participants in Part 1 receive 740 MBq (±10%) of [18F]FET to evaluate dose optimization through comparison of reconstructed reduced-dose and full-dose PET images. Participants in Part 2 receive [18F]FET at the optimized dose identified in Part 1 to evaluate its diagnostic performance for differentiating tumor progression from treatment-related changes in brain metastases with equivocal MRI findings following therapy |
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Patient-Level Mean Dice Similarity Coefficient for Lesion Spatial Agreement Between Reduced-Dose and Full-Dose [18F]FET PET Images
Zeitfenster: From Day 1 through Day 2 (±1 day) follow-up
|
The patient-level mean Dice Similarity Coefficient (DSC), derived from all evaluable lesions, will be used to assess lesion spatial agreement between each reduced-dose [18F]FET PET dataset and the full-dose reference scan. The DSC results will be used to identify the lowest [18F]FET dose demonstrating non-inferior lesion spatial agreement. |
From Day 1 through Day 2 (±1 day) follow-up
|
|
Sensitivity of [18F]FET PET for Distinguishing Tumor Progression From Treatment-Related Changes Compared With CSOT
Zeitfenster: From baseline Day 1 through CSOT determination (approximately 2-3 months).
|
Sensitivity will be assessed for [18F]FET PET at the optimized dose for distinguishing tumor progression from treatment-related changes, using the Composite Standard of Truth (CSOT) as the reference standard. |
From baseline Day 1 through CSOT determination (approximately 2-3 months).
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Number of Participants With Adverse Events Following Administration of 740 MBq [18F]FET
Zeitfenster: From Day 1 through Day 2 (±1 day) follow-up
|
The incidence and severity of adverse events and other safety findings will be assessed following administration of 740 MBq (±10%) [18F]FET PET |
From Day 1 through Day 2 (±1 day) follow-up
|
|
Inter-Reader Agreement for [18F]FET PET Classification at the Optimized Dose
Zeitfenster: Baseline Day 1 through completion of image interpretation following CSOT determination (approximately 2-3 months
|
Inter-reader agreement will be assessed for interpretation of [18F]FET PET images obtained at the optimized dose. |
Baseline Day 1 through completion of image interpretation following CSOT determination (approximately 2-3 months
|
|
Lesion-Level Sensitivity of [18F]FET PET for Distinguishing Tumor Progression From Treatment-Related Changes
Zeitfenster: From baseline Day 1 through CSOT determination, approximately 2-3 months
|
Sensitivity will be assessed at the lesion level for distinguishing tumor progression from treatment-related changes |
From baseline Day 1 through CSOT determination, approximately 2-3 months
|
|
Sensitivity of [18F]FET PET Compared With Histopathologic Confirmation
Zeitfenster: From baseline Day 1 through histopathologic confirmation, approximately 2-3 months
|
Sensitivity of [18F]FET PET will be assessed using histopathologic confirmation as the reference in participants with available histopathology. |
From baseline Day 1 through histopathologic confirmation, approximately 2-3 months
|
|
Positive Predictive Value of [18F]FET PET for Tumor Progression Compared With CSOT
Zeitfenster: From baseline Day 1 through CSOT determination, approximately 2-3 months
|
Positive predictive value will be assessed for [18F]FET PET classification of tumor progression using the Composite Standard of Truth (CSOT) as the reference standard |
From baseline Day 1 through CSOT determination, approximately 2-3 months
|
|
Negative Predictive Value of [18F]FET PET for Tumor Progression Compared With CSOT
Zeitfenster: From baseline Day 1 through CSOT determination, approximately 2-3 months
|
Negative predictive value will be assessed for [18F]FET PET classification of tumor progression using the Composite Standard of Truth (CSOT) as the reference standard. |
From baseline Day 1 through CSOT determination, approximately 2-3 months
|
|
Maximum Standardized Uptake Value (SUVmax) of [18F]FET PET Lesions
Zeitfenster: Baseline Day 1 imaging assessment
|
SUVmax will be measured for evaluable lesions on [18F]FET PET. |
Baseline Day 1 imaging assessment
|
|
Mean Standardized Uptake Value (SUVmean) of [18F]FET PET Lesions
Zeitfenster: Baseline Day 1 imaging assessment
|
SUVmean will be measured for evaluable lesions on [18F]FET PET. |
Baseline Day 1 imaging assessment
|
|
Maximum Tumor-to-Brain Ratio (TBRmax) of [18F]FET PET Lesions
Zeitfenster: Baseline Day 1 imaging assessment
|
TBRmax will be measured for evaluable lesions on [18F]FET PET. |
Baseline Day 1 imaging assessment
|
|
Mean Tumor-to-Brain Ratio (TBRmean) of [18F]FET PET Lesions
Zeitfenster: Baseline Day 1 imaging assessment
|
TBRmean will be measured for evaluable lesions on [18F]FET PET. |
Baseline Day 1 imaging assessment
|
|
Number of Participants With Treatment-Emergent Adverse Events (TEAEs) at the Optimized Dose
Zeitfenster: From Day 1 administration through study completion, approximately 5-6 months
|
Safety and tolerability at the optimized dose will be assessed by the number of participants experiencing treatment-emergent adverse events (TEAEs), including serious adverse events (SAEs), adverse events leading to treatment discontinuation, and treatment-related adverse events, as applicable. Adverse events will be assessed and graded according to the protocol-specified safety assessment criteria. |
From Day 1 administration through study completion, approximately 5-6 months
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
- PET-Bildgebung
- Positronen-Emissions-Tomographie
- Magnetresonanztomographie
- Hirntumore
- Hirnmetastasen
- Diagnostische Bildgebung
- Pseudoprogression
- Dosisoptimierung
- Tumorprogression
- Klinischer Nutzen
- Neuroonkologie
- Diagnostische Leistung
- Metastasen des zentralen Nervensystems
- Strahlennekrose
- RANO-BM
- Treatment-Related Changes
- Amino Acid PET
- Floretyrosine F 18
- [18F]FET PET
Zusätzliche relevante MeSH-Bedingungen
- Erkrankungen des Gehirns
- Erkrankungen des zentralen Nervensystems
- Erkrankungen des Nervensystems
- Pathologische Prozesse
- Neubildungen nach Standort
- Neubildungen
- Krankheitsattribute
- Neubildungen des Nervensystems
- Neubildungen des zentralen Nervensystems
- Pathologische Zustände, Anzeichen und Symptome
- Krankheitsprogression
- Neubildungen des Gehirns
- (18f) Fluoroethyltyrosin
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 18F-TLX101-Px-301
Plan für individuelle Teilnehmerdaten (IPD)
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Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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