Obese patients in an open MRI at 1.0 Tesla: image quality, diagnostic impact and feasibility
Obese patients in an open MRI at 1.0 Tesla: image quality, diagnostic impact and feasibility
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DOI：
10.1007/s00330-010-2005-2
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发表时间：
2011-05-01
影响因子：
5.9
通讯作者：
Teichgraeber, Ulf
中科院分区：
文献类型：
--
作者：
de Bucourt, Maximilian;Streitparth, Florian;Teichgraeber, Ulf
通过检查无法接受足够影像学检查的过度肥胖患者，研究开放式 MRI 系统在其概念限制下的性能。26 名过度肥胖患者（BMI >= 35，平均年龄 46 岁）无法进行 CT、标准 MR 或超声检查或无法得出结论，被转诊至 1.0 特斯拉的开放式 MRI 系统。图像质量通过肥胖患者的集成身体线圈和常规体重对照组（平均 BMI 23，平均年龄 30）的最佳身体线圈的 SNR 和 CNR 来测量。 MRI 结果通过诊断影响矩阵进行评估。与使用理想身体线圈的正常体重组相比，使用集成身体线圈的肥胖患者的 SNR 和 CNR 通常较低，例如：对于大脑成像 T2W TSE（白质 < 5%，灰质约 30%）和 T1W SE（白质约 15%，灰质 < 5%），脊柱成像 T2W TSE（椎间盘和椎间盘约 35%）椎体）和 T1W SE（椎间盘约 2%，椎体约 10%）。 30% (8/26) 发现影响患者治疗的相关新诊断，53% (14/26) 可以排除转诊医生的特定医疗问题作为医疗状况的可能原因。在无法进行 CT、标准 MR 或超声检查或无法得出结论的过度肥胖患者中，开放式 MRI 系统在诊断评估方面具有巨大潜力，可提供较低但足够的图像质量来影响治疗。
To investigate the performance of an open MRI system at its conceptual limits by examining excessively obese patients who otherwise could not receive adequate imaging examinations.Twenty-six excessively obese patients (BMI >= 35, average age 46) where CT, standard MR or ultrasound examinations were not possible or not conclusive were referred to an open MRI system at 1.0 Tesla. Image quality was measured by SNR and CNR with the integrated body coil for obese patients and optimal body coils for a regular weight control group (average BMI 23, average age 30). MRI findings were evaluated by a diagnostic impact matrix.SNR and CNR were generally lower in obese patients when the integrated body coil was used compared to the normal weight group with ideal body coils e.g.: For cerebral imaging T2W TSE (< 5% for white matter, ca. 30% for grey matter) and T1W SE (ca. 15% for white matter, < 5% for grey matter), for spinal imaging T2W TSE (ca. 35% for disc and vertebral body) and T1W SE (about 2% for disc, ca. 10% for vertebral body). Relevant new diagnoses impacting patient's therapy were identified in 30% (8/26), the particular medical question of the referring physician could be ruled out as possible reason for the medical condition in 53% (14/26).In excessively obese patients where CT, standard MR or ultrasound examination is not possible or not conlusive open MRI system have great potential in diagnostic evaluation, offering lower but sufficient image quality to impact therapy.