Comparison of MRI visualization between linearly placed iron-containing and non-iron-containing fiducial markers for prostate radiotherapy

Tanaka, Osamu; Komeda, Hisao; Tamaki, Masayoshi; Seike, Kensaku; Fujimoto, Shota; Yama, Eiichi; Hirose, Shigeki

doi:10.1259/bjr.20170612

Cited by 1 publication

(4 citation statements)

References 13 publications

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“…However, the presence of metals such as fiducial markers placed for radiotherapy planning and treatment has been reported to have an effect on the quality of magnetic resonance images 14,15,17 . In this study, we used Gold Anchor™ markers, the second most commonly used fiducial marker in Japan, which can be placed either linearly or spherically via a thin 25‐gauge needle.…”

Section: Discussionmentioning

confidence: 99%

“…3,5,8 However, the presence of metals such as fiducial markers placed for radiotherapy planning and treatment has been reported to have an effect on the quality of magnetic resonance images. 14,15,17 In this study, we used Gold Anchor™ markers, the second most commonly used fiducial marker in Japan, which can be placed either linearly or IA, USA) with 0.9 mm diameter and 10 mm long that can be placed using an 18-gauge needle; and Gold Marker (Olympus Co. Ltd., Tokyo, Japan), with 1.5 mm diameter (introducer is 1.94 mm in diameter). These markers were not examined by us in this study.…”

Section: Discussionmentioning

confidence: 99%

“…Parameters established in previous studies were used, 11,14,15 except for field of view, which was different from that used in routine MRI. We focused on the clarity of the prostate and surrounding structures.…”

Section: Methodsmentioning

confidence: 99%

“…To accumulate urine in the bladder, all patients were requested to drink Parameters established in previous studies were used, 11,14,15 except for field of view, which was different from that used in routine MRI.…”

Section: Image Acquisitionsmentioning

confidence: 99%

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Radiotherapy for prostate cancer: Effect of gold fiducial markers on diffusion‐weighted magnetic resonance imaging

Tanaka

Maejima

Yama

et al. 2020

Asia-Pac J Clncl Oncology

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Purpose There has been an increase in the use of gold fiducial markers to ensure precise radiotherapy delivery in prostate cancer patients. However, metal artifacts may affect the quality of subsequent imaging used to assess disease status following treatment. In this study, we evaluated the effect of gold fiducial markers on magnetic resonance imaging (MRI), particularly on diffusion‐weighted imaging (DWI). Material and methods Among 57 patients with prostate cancer, 21 patients in whom two gold markers were placed in the prostate tumor with abnormal signal intensity on DWI were evaluated. The effect of the markers on DWI was evaluated on a scale of 1‐5, with a high score indicating clinical usefulness. Change inapparent diffusion coefficient (ADC; 10−3 mm2/s) from before to after marker placement was also evaluated. Results The mean effect of the markers on DWI was 4.3 (standard deviation [SD] 1.3, range 2–5) points. The mean change in ADC was 0.045 (SD 0.041, range 0.025‐0.089) × 10−3 mm2/s. Conclusions The gold fiducial markers demonstrated negligible effect on DWI quality. Therefore, gold markers do not affect MRI quality, particularly DWI, and may be used during follow‐up in prostate cancer patients.

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Section: Discussionmentioning

confidence: 99%