18F-FACBC PET/MRI in the evaluation of human brain metastases: a case report

European Journal of Hybrid Imaging

Tora S. Solheim¹  Knut Johannessen²  Live Eikenes²  Erik Magnus Berntsen³  Anna Karlberg³  Håkon Johansen⁴ 

[1] Cancer Clinic, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway;Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway;Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Postboks 8905, 7491, Trondheim, Norway;Department of Circulation and Medical Imaging, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Postboks 8905, 7491, Trondheim, Norway;Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway;Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway;

关键词: Brain metastases;    Hybrid PET/MRI;    Amino acid tracers;    F-FACBC;    Stereotactic;    Radiotherapy;    Recurrence;   

DOI  :  10.1186/s41824-021-00101-6

来源: Springer

【 摘 要 】

BackgroundPatients with metastatic cancer to the brain have a poor prognosis. In clinical practice, MRI is used to delineate, diagnose and plan treatment of brain metastases. However, MRI alone is limited in detecting micro-metastases, delineating lesions and discriminating progression from pseudo-progression. Combined PET/MRI utilises superior soft tissue images from MRI and metabolic data from PET to evaluate tumour structure and function. The amino acid PET tracer 18F-FACBC has shown promising results in discriminating high- and low-grade gliomas, but there are currently no reports on its use on brain metastases. This is the first study to evaluate the use of 18F-FACBC on brain metastases.Case presentationA middle-aged female patient with brain metastases was evaluated using hybrid PET/MRI with 18F-FACBC before and after stereotactic radiotherapy, and at suspicion of recurrence. Static/dynamic PET and contrast-enhanced T1 MRI data were acquired and analysed. This case report includes the analysis of four 18F-FACBC PET/MRI examinations, investigating their utility in evaluating functional and structural metastasis properties.ConclusionAnalysis showed high tumour-to-background ratios in brain metastases compared to other amino acid PET tracers, including high uptake in a very small cerebellar metastasis, suggesting that 18F-FACBC PET can provide early detection of otherwise overlooked metastases. Further studies to determine a threshold for 18F-FACBC brain tumour boundaries and explore its utility in clinical practice should be performed.

【 授权许可】

CC BY