Intensity of bone involvement: a quantitative 18F-FDG PET/CT evaluation for monitoring outcome of multiple myeloma
| Autor: | Gislaine Oliveira Duarte, Konradin Metze, Celso Dario Ramos, Fernando V Pericole, Irene Lorand-Metze, Camila Mosci, Maria Emilia Seren Takahashi |
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| Rok vydání: | 2021 |
| Předmět: |
Multivariate statistics
medicine.diagnostic_test business.industry Significant difference Standardized uptake value Computed tomography General Medicine medicine.disease Intensity (physics) medicine.anatomical_structure Positron Emission Tomography Computed Tomography Medicine Radiology Nuclear Medicine and imaging Fdg pet ct Bone marrow business Nuclear medicine Multiple myeloma |
| Zdroj: | Nuclear medicine communicationsReference. 42(12) |
| ISSN: | 1473-5628 |
| Popis: | The parameter intensity of bone involvement (IBI) was recently proposed to quantitatively assess patients with multiple myeloma using 18F-fluorodeoxyglucose-PET combined with computed tomography (18F-FDG PET/CT) images. Here, we aimed to calculate IBI variation (ΔIBI) between two consecutive PET/CT of the same patient and verified its relationship with a subjective visual analysis of the images and with clinical outcome.Consecutive whole-body 18F-FDG PET/CT performed to assess the outcomes of 29 patients diagnosed with multiple myeloma were retrospectively evaluated. ΔIBI was calculated after bone segmentation, using liver standardized uptake value as a threshold to determine metabolically active volumes in the skeleton. For each pair of consecutive PET/CTs, two nuclear medicine physicians classified visually the most recent image as PET-remission, PET-progression or PET-stable when compared to the previous examination.The lowest ΔIBI was -1.27 and the highest was 0.29. PET-remission was related to ΔIBI0 (median = -0.10; -1.27 to +0.03), while PET-progression was related to ΔIBI0 (median = 0.02; -0.07 to +0.29). ΔIBI around zero was found in images classified as PET-stable (median = 0.00; -0.08 to +0.06). Significant difference in ΔIBI was found between the three groups. Multivariate stepwise analysis showed that IBI value at diagnostic PET/CT, serum calcium and percentage of plasma cells in the bone marrow are independent prognostic factors.Delta IBI provides quantitative data for variations of 18F-FDG uptake in the bone marrow during the follow-up of the patients. In addition, higher IBI values at diagnosis are associated with a higher risk of patient's death. |
| Databáze: | OpenAIRE |
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