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GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE

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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2012 April;171(2):181-9

Copyright © 2012 EDIZIONI MINERVA MEDICA

language: Italian

Optimization of technical and dosimetric parameters

Fossaceca R. 1, Guzzardi G. 1, Di Terlizzi M. 1, Divenuto I. 1, Cerini P. 1, Malatesta E. 1, Cannillo B. 2, Brambilla M. 2, Carriero A. 1

1 SCDU Radiodiagnostica e Radiologia Interventistica, A.O.U. Maggiore della Carità, Novara, Italia; 2 SCDU Fisica Sanitaria, A.O.U. Maggiore della Carità, Novara, Italia


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Aim. The aim of the study was the evaluation of dosimetric parameters during CT-guided percutaneous vertebroplasty (PVP) in order to optimize and reduce the radiation dose to the patient.
Methods. Sixteen patients with indication for PVP were divided into two groups with different CT scan protocols; standard protocol (120 kV and 300 mAs) and modified protocol (100 kV and 55 mAs). The main dosimetric parameters analyzed and compared have been: CT-dose index (CTDI), dose length product (DLP) and effective dose (Eeff).
Results. Treatment with modified protocol resulted in a statistically significant reduction of CTDI and DLP values. The reduction of signal to noise ratio did not result in a less reliable therapeutic procedure.
Conclusions. CT-guided PVP with modified protocol allows for an adequate technical intra-procedural assessment with a reduced dosimetric exposure for the patient and is therefore the option of choice in this type of treatment.

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