MDCT-based Finite Element Analysis of Vertebral Fracture Risk: What Dose is Needed?

D. Anitha, Kai Mei, Michael Dieckmeyer, Felix K. Kopp, Nico Sollmann, Claus Zimmer, Jan S. Kirschke, Peter B. Noel, Thomas Baum, Karupppasamy Subburaj

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Purpose: The aim of this study was to compare vertebral failure loads, predicted from finite element (FE) analysis of patients with and without osteoporotic vertebral fractures (OVF) at virtually reduced dose levels, compared to standard-dose exposure from multidetector computed tomography (MDCT) imaging and evaluate whether ultra-low dose derived FE analysis can still differentiate patient groups. Materials and Methods: An institutional review board (IRB) approval was obtained for this retrospective study. A total of 16 patients were evaluated at standard-dose MDCT; eight with and eight without OVF. Images were reconstructed at virtually reduced dose levels (i.?e. half, quarter and tenth of the standard dose). Failure load was determined at L1–3 from FE analysis and compared between standard, half, quarter, and tenth doses and used to differentiate between fracture and control groups. Results: Failure load derived at standard dose (3254?± 909?N and 3794?± 984?N) did not significantly differ from half (3390?± 890?N and 3860?± 1063?N) and quarter dose (3375?± 915?N and 3925?± 990?N) but was significantly higher for one tenth dose (4513?± 1762?N and 4766?± 1628?N) for fracture and control groups, respectively. Failure load differed significantly between the two groups at standard, half and quarter doses, but not at tenth dose. Receiver operating characteristic (ROC) curve analysis also demonstrated that standard, half, and quarter doses can significantly differentiate the fracture from the control group. Conclusion: The use of MDCT enables a dose reduction of at least 75% compared to standard-dose for an adequate prediction of vertebral failure load based on non-invasive FE analysis.

Original languageEnglish
Pages (from-to)645-651
Number of pages7
JournalClinical Neuroradiology
Issue number4
StatePublished - 1 Dec 2019
Externally publishedYes


  • Finite element analysis
  • Multidetector computed tomography
  • Osteoporosis
  • Radiation dosage
  • Spinal fractures


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