TY  - JOUR
A1  - Ese, Zehra
A1  - Kressmann, Marcel
A1  - Kreutner, Jakob
A1  - Schaefers, Gregor
A1  - Erni, Daniel
A1  - Zylka, Waldemar
T1  - Influence of conventional and extended CT scale range on quantification of Hounsfield units of medical implants and metallic objects
T2  - Technisches Messen (tm). Plattform für Methoden, Systeme und Anwendungen der Messtechnik
N2  - We report on the suitability of two different ranges of Hounsfield units (HU) in computed tomography (CT) for the quantification of metallic components of active implantable medical devices (AIMD). The conventional Hounsfield units (CHU) range, which is traditionally used in radiology, is well suited for tissue but suspected inappropriate for metallic materials. Precise HU values are notably beneficial in radiotherapy (RT) for accurate dose calculations, thus for the safety of patient carrying implants. Some of today’s CT machines offers an extended Hounsfield units (EHU) range. This study presents CT acquisitions of a water phantom containing various metallic discs and an implantable-cardioverter defibrillator (IPG). We show that the comparison of HU values at EHU and CHU ranges clearly reveals the superiority and accuracy of EHU. Some geometrical discrepancies perpendicular to slices are observed. At EHU metal artifact reduction algorithms (MAR) underestimates HU values rendering MAR potentially inappropriate for RT.
Y1  - 2018
UR  - https://whge.opus.hbz-nrw.de/frontdoor/index/index/docId/3154
SN  - 0171-8096
VL  - 85
IS  - 5
SP  - 343
EP  - 350
ER  -