While absolute quantification in 18F-FDG PET (Positon Emission Tomography) is widely used in clinical routine, absolute quantification in SPECT (Single Photon Emission Computed Tomography) is under development and its clinical interest remains to be demonstrated. Recent studies carried out on bone scan recordings show the potential interest of quantification indexes such as SUV (Standard Uptake Value).

In oncology, bone scan studies have reported significantly higher SUV values for secondary bone lesions compared with benign osteoarticular lesions , and some have even defined an SUVmax threshold value that points to prostatic bone metastases.

Inclusion Criteria:

• Patients with recent vertebral fractures:

  1. who have had at least two SPECT/CT scan scans of the spine as part of a pre-vertebroplasty check-up,
  2. for which fracture dates were known.

Exclusion Criteria:

1. Minor person
2. Person opposing the use of their data (Posters in waiting rooms explaining that the patient must object if they do not wish their data to be used)

Patients referred for SPECT/CT scan of the spine as part of a vertebroplasty workup and selected retrospectively.