CT metal artefact reduction of total knee prostheses using angled gantry multiplanar reformation

Lewis, Mark H.; Toms, Andoni P.; Reid, Karen; Bugg, William

doi:10.1016/j.knee.2010.02.007

Cited by 15 publications

(7 citation statements)

References 7 publications

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“…1 ). Several methods have been proposed to reduce metal artifacts [ 6 , 12 , 16 , 24 , 26 ], which are the result of photon starvation and beam-hardening of the metal components of the prosthesis [ 2 ]. These methods include changes in scan parameters, such as higher tube voltage, and the use of image post-processing algorithms [ 13 , 14 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Dual-energy CT and ceramic or titanium prostheses material reduce CT artifacts and provide superior image quality of total knee arthroplasty

Kasparek

Töpker

Lázár

et al. 2018

Knee Surg Sports Traumatol Arthrosc

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Section: Introductionmentioning

confidence: 99%

Dual-energy CT and ceramic or titanium prostheses material reduce CT artifacts and provide superior image quality of total knee arthroplasty

Kasparek

Töpker

Lázár

et al. 2018

Knee Surg Sports Traumatol Arthrosc

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“…This has limited usefulness in the setting of dental implants, heart valves and knee prostheses. 15,16 Using a high peak kilovoltage (kVp) without changing the overall dose reduces beam hardening at the expense of some soft-tissue contrast and has been used in the assessment of cardiac valvular prostheses. 17 Dual-energy imaging uses two kVp data sets to computationally simulate a monochromatic beam, effectively eliminating the beam-hardening artefact and allowing more accurate subtraction of specific densities.…”

Section: Hardware Techniquesmentioning

confidence: 99%

Orthopaedic and non-orthopaedic applications of a single-energy iterative metal artefact reduction technique and other metal artefact reduction techniques explained

Khor

Buchan

Kuganesan

et al. 2016

BJR

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Metal within the CT field of view causes artefact that degrades the diagnostic quality of the processed images. This is related to the high atomic number of most metals and is due to a combination of beam hardening, scatter, edge effects and photon starvation. Both software and hardware metal artefact reduction (MAR) techniques have been developed. Iterative reconstruction software MAR techniques can be applied on raw CT data sets and show improved image quality in the setting of sparse projection data when compared with filtered back-projection methods. Recently, a novel singleenergy iterative metal artefact reduction technique (IMART) was released for use with large orthopaedic devices. The aim of this pictorial essay was to demonstrate the usefulness of IMART in the setting of both orthopaedic and nonorthopaedic metallic objects and devices.

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“…In some clinical situations, it is challenging to avoid beam hardening artifacts from the ipsilateral/contralateral side of the arch. Few other studies investigated the effect of tilting the subject or gantry in multidetector CT (MDCT) [ 12 ]. During CBCT scan acquisition, the patient is placed in the Frankfort plane.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mandible Phantom Inclination in the Axial Plane on Image Quality in the Presence of Implant Using Cone-Beam Computer Tomography

Khurana¹,

Parasher²,

Creanga³

et al. 2023

Cureus

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To assess the effect of 30° phantom inclination on image quality in the presence of an implant using conebeam computed tomography (CBCT). Materials and methodsThree series of eight scans were taken and categorized by a range of 87-90 kVp and 7.1 mA, and 8 mA. For the first CBCT series, the phantom was placed on a flat plane. For the second series, the phantom was inclined at 30° in the axial plane. For the third series, inclined scans were re-oriented and included for statistics. In total, 24 scans were used for statistics. i.e., eight scans at three different planes (flat plane, inclined plane, and re-oriented inclined plane). All the images were analyzed for artifact and contrast-tonoise ratio (CNR) on ImageJ software. ResultsThe inclination of the dry human mandible phantom by 30° reduces the artifact (p <0.05). However, the CNR was not affected by the phantom inclination. ConclusionThe appropriate inclination of the head can significantly reduce the metal artifact in the presence of implants and thus improve the CBCT image quality for post-operative follow-up.

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CT metal artefact reduction of total knee prostheses using angled gantry multiplanar reformation

Cited by 15 publications

References 7 publications

Dual-energy CT and ceramic or titanium prostheses material reduce CT artifacts and provide superior image quality of total knee arthroplasty

Dual-energy CT and ceramic or titanium prostheses material reduce CT artifacts and provide superior image quality of total knee arthroplasty

Orthopaedic and non-orthopaedic applications of a single-energy iterative metal artefact reduction technique and other metal artefact reduction techniques explained

Effect of Mandible Phantom Inclination in the Axial Plane on Image Quality in the Presence of Implant Using Cone-Beam Computer Tomography

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