Phased-array MRI of canine prostate using endorectal and endourethral coils.

Phased-array MRI of canine prostate using endorectal and endourethral coils.
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使用直肠内和尿道内线圈对犬前列腺进行相控阵 MRI。

DOI:
10.1002/mrm.10432
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发表时间:
2003
影响因子:
3.3
通讯作者:
Atalar,Ergin
Atalar,Ergin
中科院分区:
医学3区
文献类型:
--
作者:
Yung,AndrewC;Oner,AliY;Serfaty,Jean-Michel;Feneley,Mark;Yang,Xiaoming;Atalar,Ergin

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设计了一个由一个表面线圈、两个直肠内线圈和一个柔性内尿路线圈组成的四通道相控阵,用于犬前列腺的磁共振成像。直肠内线圈在前列腺后部提供高信号,而尿路内线圈和表面线圈对前列腺的中央和前部区域很敏感。凝胶体模实验表明,提出的相控阵结构产生的信噪比(SNR)是两个表面线圈和一个位于前列腺后部的直肠内线圈的组合的15倍;两种配置的性能在前列腺癌前表面附近相当。利用极限本征信噪比(UISNR)分析比较了所提出的相控阵的性能与外部线圈的最佳信噪比。这项分析表明,提出的相控阵的性能比最好的情况下的外线圈在前列腺后部和中央区域的性能高达20倍。在犬体内实验中,在3min 12 S的时间内获得了像元尺寸为230μm的高分辨率快速自旋回波图像。提出的相控阵设计可能用于提高前列腺癌分期的准确性和MR引导前列腺介入治疗的可行性。《医学评论》49:710-715,2003。©2003 Wiley-Liss公司
A four‐channel phased array consisting of one surface coil, two endorectal coils, and one flexible endourethral loop coil was designed for MRI of the canine prostate. The endorectal coils provide high signal in the posterior region of the prostate, while the endourethral and surface coils are sensitive to the central and anterior regions of the prostate. Gel phantom experiments indicate that the proposed phased‐array configuration generates 15 times more signal‐to‐noise ratio (SNR) than a combination of two surface coils and one endorectal coil within the posterior region of the prostate; the performance of the two configurations is comparable near the anterior prostate surface. Ultimate intrinsic SNR (UISNR) analysis was used to compare the proposed phased array's performance to the best possible SNR for external coils. This analysis showed that the proposed phased array outperforms the best‐case external coil within the posterior and central regions of the prostate by up to 20 times. In canine experiments in vivo, high‐resolution fast spin‐echo (FSE) images of the prostate were obtained with a pixel size of 230 μm obtained in 3 min 12 s. The proposed phased‐array design potentially can be used to increase the accuracy of prostate cancer staging and the feasibility of MR‐guided prostate interventions. Magn Reson Med 49:710–715, 2003. © 2003 Wiley‐Liss, Inc.
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DOI: --
发表时间: 1985
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K. Kasturi;P. Harrison
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R. Sinden
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恶性疟原虫裂殖子分泌膜轮的棒状体。
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主要裂殖子表面抗原的前体:结构和免疫中的作用。
DOI: 10.1159/000318614
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期刊: Progress in allergy
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DOI: 10.1083/jcb.93.3.591
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