Assessment of wear and periacetabular osteolysis using dual energy computed tomography on a pig cadaver to identify the lowest acceptable radiation dose

Objectives Computed tomography (CT) plays an important role in evaluating wear and periacetabular osteolysis (PAO) in total hip replacements. One concern with CT is the high radiation exposure since standard pelvic CT provides approximately 3.5 millisieverts (mSv) of radiation exposure, whereas a planar radiographic examination with three projections totals approximately 0.5 mSv. The objective of this study was to evaluate the lowest acceptable radiation dose for dual-energy CT (DECT) images when measuring wear and periacetabular osteolysis in uncemented metal components. Materials and Methods A porcine pelvis with bilateral uncemented hip prostheses and with known linear wear and acetabular bone defects was examined in a third-generation multidetector DECT scanner. The examinations were performed with four different radiation levels both with and without iterative reconstruction techniques. From the high and low peak kilo voltage acquisitions, polychrmoatic images were created together with virtual monochromatic images of energies 100 kiloelectron volts (keV) and 150 keV. Results We could assess wear and PAO while substantially lowering the effective radiation dose to 0.7 mSv for a total pelvic view with an accuracy of around 0.5 mm for linear wear and 2 mm to 3 mm for PAO. Conclusion CT for detection of prosthetic wear and PAO could be used with clinically acceptable accuracy at a radiation exposure level equal to plain radiographic exposures.

Skorpil, M.Karolinska Institutet,Karolinska Institute, Sweden (författare)
Nowik, P.Karolinska Institute, Sweden; Karolinska University Hospital, Sweden (författare)
Olivecrona, H.Karolinska Institute, Sweden (författare)
Crafoord, J.Karolinska Institute, Sweden; Ersta Hospital, Sweden (författare)
Weidenhielm, L.Karolinska Institutet,Karolinska Institute, Sweden; Karolinska Institute, Sweden (författare)
Persson, AndersLinköpings universitet,Avdelningen för radiologiska vetenskaper,Medicinska fakulteten,Centrum för medicinsk bildvetenskap och visualisering, CMIV,Region Östergötland, Röntgenkliniken i Linköping,Karolinska Institute, Sweden(Swepub:liu)andpe75 (författare)
Karolinska InstitutetKarolinska Institute, Sweden (creator_code:org_t)

Ingår i:Bone & Joint Research: BRITISH EDITORIAL SOC BONE JOINT SURGERY5:7, s. 307-3132046-3758

Av författaren/redakt...: Sandgren, B.; Skorpil, M.; Nowik, P.; Olivecrona, H.; Crafoord, J.; Weidenhielm, L.; visa fler...; Persson, Anders; visa färre...

Om ämnet

MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Klinisk medicin; och Ortopedi

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.