The value of spectral imaging to reduce artefacts in the body after <sup>125</sup>I seed implantation

Liu, Jingang; Zhao, Xingsheng; Shen, Zhen; Shao, Weiguang; Wang, Xizhen; Li, Lixin; Wang, Bin

doi:10.1111/1754-9485.12504

Cited by 1 publication

(2 citation statements)

References 25 publications

(49 reference statements)

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“…Another study revealed that VMI combined with MAR significantly increased the CNR of images following 125 I seeds implantation. The optimal SNR and CNR values were achieved at VMI 80 keV( 4 ). The disparity between the optimal VMI keV level in our study and previous literature suggested significant differences in the spectral imaging methods utilized in the 2 studies.…”

Section: Discussionmentioning

confidence: 99%

“…A previous study indicated that the AI value initially increased and then decreased as VMI keV increased. The lowest AI value was achieved at a virtual monoenergetic level of 80 keV ( 4 ). Another study focused on artifact reduction after 125 I seeds implantation revealed that the average SD value and AI value of artifact images decreased as VMI keV increased ( 3 ).…”

Section: Discussionmentioning

confidence: 99%

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Utility of spectral CT with orthopedic metal artifact reduction algorithms for 125I seeds implantation in mediastinal and hepatic tumors

Zhou,

Lei,

Wang

et al. 2024

Quant Imaging Med Surg

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Background Virtual monochromatic image (VMI) combined with orthopedic metal artifact reduction algorithms (VMI + O-MAR) can effectively reduce artifacts caused by metal implants of different types. Nevertheless, so far, no study has systematically evaluated the efficacy of VMI + O-MAR in reducing various types of metal artifacts induced by 125 I seeds. The aim of this study was to assess the effectiveness of combining spectral computed tomography (CT) images with O-MAR in reducing metal artifacts and improving the image quality affected by artifacts in patients after 125 I radioactive seeds implantation (RSI). Methods A total of 45 patients who underwent dual-layer detector spectral CT (DLCT; IQon, Philips Healthcare) scanning of mediastinal and hepatic tumors after 125 I RSI were retrospectively included. Spectral data were reconstructed into conventional image (CI), VMI, CI combined with O-MAR (CI + O-MAR), and VMI + O-MAR to evaluate the de-artifact effect and image quality improvement. Objective indicators included signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and artifact index (AI) of lesions affected by artifacts. Subjective indicators included assessment of overcorrected artifacts and new artifacts, different morphology of artifacts, and overall image quality. Results In artifact-affected lesion areas, SNR and CNR in the CI/VMI + O-MAR groups were better than those in CI groups (all P values <0.05). The AI showed a downward trend as VMI keV increased (all P values <0.001). The AI values of the CI/VMI (50–150 keV) group were all higher than the groups of CI/VMI + O-MAR (50–150 keV) (P<0.001). Overcorrection artifacts and new artifacts were concentrated in the VMI50/70 keV groups. In the evaluation of artifact morphology, as the VMI keV increased, the number of near-field banding artifacts in hyperdense artifacts gradually decreased, whereas the number of minimal or no artifacts increased, and the total number of hyperdense artifacts were decreased. The diagnostic and image quality scores of hyperdense artifacts were higher than those of hypodense artifacts as VMI keV increased. Conclusions High VMI level combined with O-MAR substantially improve objective and subjective image quality, lesion display ability, and diagnostic confidence of CT follow-up after 125 I RSI, especially at the VMI + O-MAR 150 keV level.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Utility of spectral CT with orthopedic metal artifact reduction algorithms for 125I seeds implantation in mediastinal and hepatic tumors

Zhou,

Lei,

Wang

et al. 2024

Quant Imaging Med Surg

View full text Add to dashboard Cite

show abstract

The value of spectral imaging to reduce artefacts in the body after ¹²⁵I seed implantation

Cited by 1 publication

References 25 publications

Utility of spectral CT with orthopedic metal artifact reduction algorithms for 125I seeds implantation in mediastinal and hepatic tumors

Utility of spectral CT with orthopedic metal artifact reduction algorithms for 125I seeds implantation in mediastinal and hepatic tumors

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The value of spectral imaging to reduce artefacts in the body after 125I seed implantation

Cited by 1 publication

References 25 publications

Utility of spectral CT with orthopedic metal artifact reduction algorithms for 125I seeds implantation in mediastinal and hepatic tumors

Utility of spectral CT with orthopedic metal artifact reduction algorithms for 125I seeds implantation in mediastinal and hepatic tumors

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The value of spectral imaging to reduce artefacts in the body after ¹²⁵I seed implantation