Your browser doesn't support javascript.
loading
Aortic Valve and Thoracic Aortic Calcification Measurements: How Low Can We Go in Radiation Dose?
van Hamersvelt, Robbert Willem; den Harder, Annemarie M; Willemink, Martin J; Schilham, Arnold M R; Lammers, Jan-Willem J; Nathoe, Hendrik M; Budde, Ricardo P J; Leiner, Tim; de Jong, Pim A.
Afiliação
  • van Hamersvelt RW; From the Departments of *Radiology, †Pulmonary Diseases, and ‡Cardiology, University Medical Center Utrecht, Utrecht; and §Department of Radiology, Erasmus Medical Center, Rotterdam, the Netherlands.
J Comput Assist Tomogr ; 41(1): 148-155, 2017 Jan.
Article em En | MEDLINE | ID: mdl-27560017
ABSTRACT

OBJECTIVE:

This study aimed to determine the lowest radiation dose and iterative reconstruction level(s) at which computed tomography (CT)-based quantification of aortic valve calcification (AVC) and thoracic aortic calcification (TAC) is still feasible.

METHODS:

Twenty-eight patients underwent a cardiac CT and 20 patients a chest CT at 4 different dose levels (routine dose and approximately 40%, 60%, and 80% reduced dose). Data were reconstructed with filtered back projection, 3 iDose levels, and 3 iterative model-based reconstruction levels. Two observers scored subjective image quality. The AVC and TAC were quantified using mass and compared to the reference scan (routine dose reconstructed with filtered back projection).

RESULTS:

In cardiac CT at 0.35 mSv (60% reduced), all scans reconstructed with iDose (all levels) were diagnostic, calcification detection errors occurred in only 1 patient, and there were no significant differences in mass scores compared to the reference scan. Similar results were found for chest CT at 0.48 mSv (75% reduced) with iDose levels 4 and 6 and iterative model reconstruction levels 1 and 2.

CONCLUSIONS:

Iterative reconstruction enables AVC and TAC quantification on CT at submillisievert dose.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Aorta Torácica / Valva Aórtica / Proteção Radiológica / Tomografia Computadorizada por Raios X / Exposição à Radiação / Calcificação Vascular Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Aged / Female / Humans / Male / Middle aged Idioma: En Revista: J Comput Assist Tomogr Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Holanda

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Aorta Torácica / Valva Aórtica / Proteção Radiológica / Tomografia Computadorizada por Raios X / Exposição à Radiação / Calcificação Vascular Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Aged / Female / Humans / Male / Middle aged Idioma: En Revista: J Comput Assist Tomogr Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Holanda