Universidad Peruana Cayetano Heredia

Can gray values be converted to Hounsfield units? A systematic review

Mostrar el registro sencillo del ítem

dc.contributor.author Eguren, Marjorie
dc.contributor.author Holguin, Anderson
dc.contributor.author Diaz, Karla
dc.contributor.author Vidalon, Jose
dc.contributor.author Linan, Carlos
dc.contributor.author Pereira, Camila
dc.contributor.author Lagravere-Vich, Manuel Oscar
dc.date.accessioned 2021-10-04T23:00:56Z
dc.date.available 2021-10-04T23:00:56Z
dc.date.issued 2021
dc.identifier.uri https://hdl.handle.net/20.500.12866/9792
dc.description.abstract OBJECTIVES: The purpose of this systematic review was to answer the focus question: "Could the gray values (GVs) from CBCT (cone beam computed tomography) be converted to Hounsfield units (HUs) in multidetector computed tomography (MDCT)?" METHODS: The included studies try to answer the research question according to the PICO strategy. Studies were gathered by searching several electronic databases and partial grey literature up to January 2021 without language or time restrictions. The methodological assessment of the studies was performed using The Oral Health Assessment Tool (OHAT) for in vitro studies and the Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2) for in vivo studies. The Grading of Recommendations Assessment, Development and Evaluation (GRADE system) instrument was applied to assess the level of evidence across the studies. RESULTS: 2710 articles were obtained in Phase 1, and 623 citations remained after removing duplicates. Only three studies were included in this review using a two-phase selection process and after applying the eligibility criteria. All studies were methodologically acceptable, although in general terms with low risks of bias. There are some included studies with quite low and limited evidence estimations and recommendation forces; evidencing the need for clinical studies with diagnostic capacity to support its use. CONCLUSIONS: This systematic review demonstrated that the GVs from CBCT cannot be converted to HUs due to the lack of clinical studies with diagnostic capacity to support its use. However, it is evidenced that three conversion steps (equipment calibration, prediction equation models, and a standard formula (converting GVs to HUs)) are needed to obtain pseudo Hounsfield values instead of only obtaining them from a regression or directly from the software en_US
dc.language.iso eng
dc.publisher British Institute of Radiology
dc.relation.ispartofseries Dentomaxillofacial Radiology
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject diagnostic imaging en_US
dc.subject systematic review en_US
dc.subject Cone-beam computed tomography en_US
dc.subject Bone density en_US
dc.subject Hounsfield unit en_US
dc.subject Multidetector Computed Tomography en_US
dc.title Can gray values be converted to Hounsfield units? A systematic review en_US
dc.type info:eu-repo/semantics/review
dc.identifier.doi https://doi.org/10.1259/dmfr.20210140
dc.relation.issn 1476-542X


Ficheros en el ítem

Ficheros Tamaño Formato Ver

No hay ficheros asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

info:eu-repo/semantics/restrictedAccess Excepto si se señala otra cosa, la licencia del ítem se describe como info:eu-repo/semantics/restrictedAccess

Buscar en el Repositorio


Listar

Panel de Control

Estadísticas