Improved image quality in abdominal CT in patients who underwent treatment for hepatocellular carcinoma with small metal implants using a raw data-based metal artifact reduction algorithm

Abstract

• SEMAR algorithm significantly reduces metallic artefacts from small implants in abdominal CT. • SEMAR can improve image quality of the liver in dynamic CECT. • Confidence visualization of hepatic vascular anatomies can also be improved by SEMAR.

Evaluation of CT Angiography Image Quality Acquired with Single-Energy Metal Artifact Reduction (SEMAR) Algorithm in Patients After Complex Endovascular Aortic Repair

“…In our study, we found improved image quality with reduced noise, improved CNR, less artifacts, and an improved visualization of stent patency on the CT images after SEMAR reconstruction in all target visceral arteries. Our findings are in agreement with prior studies on metal implants and embolization material, showing that SEMAR is effective in decreasing metal artifacts in single-energy CT images [ 8 , 9 , 13 – 15 ].…”

“…Various authors have proved the positive impact of SEMAR on metal artifact reduction in CT images of patients with orthopedic prostheses [ 14 , 15 ], embolization coils [ 8 , 9 , 15 ], and dental prostheses [ 13 ]. The impact of the SEMAR algorithm on CTA metal artifact reduction in patients after fenestrated and/or branched EVAR (F/B-EVAR) has not yet been investigated.…”

Radiotherapy planning of spine and pelvis using single-energy metal artifact reduction corrected computed tomography sets

“…Single-energy metal artifact reduction (SEMAR, Canon Medical Systems Corporation, Ōtawara, Japan) is one of the many commercially available clinically used metal artifact reduction techniques [6] . SEMAR has proved to reduce metal artifacts in a range of clinical sites [7] , [8] , [9] , [10] , [11] . There are reports in the literature on improvements in CT number prediction and dose calculation accuracy by using SEMAR in carbon-ion therapy [12] , brachytherapy [13] , and EBRT [4] .…”