评价一款灵活的 12 通道印制儿科 MRI 线圈。
Evaluation of a Flexible 12-Channel Screen-printed Pediatric MRI Coil.
机构信息
From the Department of Radiology, Stanford University, 300 Pasteur Dr, Stanford, CA 94305 (S.A.W., A.C., M.A., S.V.); Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Calif (J.C., B.L., M.L., A.C.A.); Lucile Packard Children's Hospital at Stanford, Stanford, Calif (K.O., J.R.B.); GE Healthcare, Menlo Park, Calif (V.T.); GE Healthcare, Aurora, Ohio (T.G., F.R.); and Department of Electrical Engineering, Stanford University, Stanford, Calif (G.S., J.P.).
出版信息
Radiology. 2019 Apr;291(1):180-185. doi: 10.1148/radiol.2019181883. Epub 2019 Feb 26.
Background Screen-printed MRI coil technology may reduce the need for bulky and heavy housing of coil electronics and may provide a better fit to patient anatomy to improve coil performance. Purpose To assess the performance and caregiver and clinician acceptance of a pediatric-sized screen-printed flexible MRI coil array as compared with conventional coil technology. Materials and Methods A pediatric-sized 12-channel coil array was designed by using a screen-printing process. Element coupling and phantom signal-to-noise ratio (SNR) were assessed. Subjects were scanned by using the pediatric printed array between September and November 2017; results were compared with three age- and sex-matched historical control subjects by using a commercial 32-channel cardiac array at 3 T. Caregiver acceptance was assessed by asking nurses, technologists, anesthesiologists, and subjects or parents to rate their coil preference. Diagnostic quality of the images was evaluated by using a Likert scale (5 = high image quality, 1 = nondiagnostic). Image SNR was evaluated and compared. Results Twenty study participants were evaluated with the screen-printed coil (age range, 2 days to 12 years; 11 male and nine female subjects). Loaded pediatric phantom testing yielded similar noise covariance matrices and only slightly degraded SNR for the printed coil as compared with the commercial coil. The caregiver acceptance survey yielded a mean score of 4.1 ± 0.6 (scale: 1, preferred the commercial coil; 5, preferred the printed coil). Diagnostic quality score was 4.5 ± 0.6. Mean image SNR was 54 ± 49 (paraspinal muscle), 78 ± 51 (abdominal wall muscle), and 59 ± 35 (psoas) for the printed coil, as compared with 64 ± 55, 65 ± 48, and 57 ± 43, respectively, for the commercial coil; these SNR differences were not statistically significant (P = .26). Conclusion A flexible screen-printed pediatric MRI receive coil yields adequate signal-to-noise ratio in phantoms and pediatric study participants, with similar image quality but higher preference by subjects and their caregivers when compared with a conventional MRI coil. © RSNA, 2019 Online supplemental material is available for this article. See also the editorial by Lamb in this issue.
背景 印刷式磁共振成像（MRI）线圈技术可能减少对大型和重型线圈电子设备的需求，并可能更好地贴合患者解剖结构，从而提高线圈性能。目的 评估一款经专门设计的小儿用印刷式柔性 MRI 线圈与传统线圈技术相比的性能，以及其在医护人员和临床医生中的接受程度。材料与方法 采用印刷工艺设计一款 12 通道的小儿用线圈阵列。评估元件耦合和体模信噪比（SNR）。2017 年 9 月至 11 月期间，使用小儿用印刷式线圈对研究对象进行扫描；结果与使用 3T 下的 32 通道心脏阵列的 3 例年龄和性别匹配的历史对照研究对象进行比较。通过询问护士、技师、麻醉师以及研究对象或其家长对线圈的偏好，评估医护人员对线圈的接受程度。使用 Likert 量表（5 分表示图像质量高，1 分表示图像无法诊断）评估图像的诊断质量。评估并比较图像 SNR。结果 共对 20 名研究对象使用印刷式线圈进行了评估（年龄 2 天至 12 岁；男 11 例，女 9 例）。与商用线圈相比，负载小儿体模的测试产生了相似的噪声协方差矩阵，仅略微降低了印刷式线圈的 SNR。接受程度调查问卷的平均评分为 4.1±0.6（评分：1 分表示更喜欢商用线圈；5 分表示更喜欢印刷式线圈）。诊断质量评分为 4.5±0.6。印刷式线圈的平均图像 SNR 为 54±49（椎旁肌肉）、78±51（腹壁肌肉）和 59±35（腰大肌），而商用线圈的相应 SNR 分别为 64±55、65±48 和 57±43；这些 SNR 差异无统计学意义（P=0.26）。结论 与传统 MRI 线圈相比，一款柔性印刷式小儿用 MRI 接收线圈在体模和小儿研究对象中产生了足够的 SNR，具有相似的图像质量，但研究对象及其家长的接受程度更高。
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