MR image overlay guidance: system evaluation for preclinical use.
MR image overlay guidance: system evaluation for preclinical use.
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MR 图像叠加指导：临床前使用的系统评估。
DOI：
10.1007/s11548-012-0788-0
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发表时间：
2013
影响因子：
3
通讯作者：
Iordachita,Iulian
中科院分区：
文献类型：
--
作者：
U-Thainual,Paweena;Fritz,Jan;Moonjaita,Choladawan;Ungi,Tamas;Flammang,Aaron;Carrino,JohnA;Fichtinger,Gabor;Iordachita,Iulian
目的开发用于 MRI 引导肌肉骨骼干预的临床增强现实引导系统磁共振图像叠加系统 (MR-IOS)。本研究的目的是评估 MR-IOS 的 MRI 兼容性、系统精度、技术效率和操作员表现。方法和材料通过测量系统在各种开/关状态下的信噪比 (SNR) 图像质量和信号强度均匀性来评估 MR-IOS 对 MR 环境的影响。系统准确性通过室内临床前实验进行评估，由专家操作员在脊柱模型上进行 62 次针插入，测量进入、深度、角度和目标误差。通过对 40 名新手操作员（其中 20 名使用徒手技术，20 名 MR-IOS 引导）进行实验，在实验室中测试了技术效率和操作员表现，每个操作员将 10 根针插入几何模型中。通过比较两个操作者组之间的进针成功率来衡量技术效率。通过比较两个操作组之间的总手术时间、总针路径距离、假定的组织损伤和单独插入的速度来评估操作员的表现。结果 MR-IOS 最大改变了 2% 的信噪比，而图像质量或均匀性没有明显变化。精度评估显示平均进入误差为 1.6 ± 0.6 毫米，深度误差为 0.7 ± 0.5 毫米，角度误差为 1.5 ± 1.1°，目标误差为 1.9 ± 0.8 毫米。技术功效显示成功率（徒手 35.0% 与 MR-IOS 80.95%）之间存在统计显着差异 (p= 0.031)。操作员表现显示：徒手平均总手术时间为 40.3 ± 4.4 (s)，MR-IOS 平均总手术时间为 37.0 ± 3.7 (s) (p= 0.584)，徒手针路距离为 152.6 ± 15.0 mm，MR-IOS 为 116.9 ± 8.7 mm (p= 0.074)，推测组织损伤为徒手插入速度为 7,417.2 ± 955.6 mm2，MR-IOS 插入速度为 6062.2 ± 678.5 mm2 (p= 0.347)，徒手插入速度为 5.9 ± 0.4 mm/s，MR-IOS 插入速度为 4.3 ± 0.3 mm/s (p= 0.003)。结论 MR-IOS 在临床 MR 成像环境中兼容，进针准确，技术有效，并且比无辅助插入技术提高了操作员的表现。 MR-IOS 被发现适合在临床环境中进行进一步测试。
PurposeA clinical augmented reality guidance system was developed for MRI-guided musculoskeletal interventions Magnetic Resonance Image Overlay System (MR-IOS). The purpose of this study was to assess MRI compatibility, system accuracy, technical efficacy, and operator performance of the MR-IOS.Methods and materialsThe impact of the MR-IOS on the MR environment was assessed by measuring image quality with signal-to-noise ratio (SNR) and signal intensity uniformity with the system in various on/off states. The system accuracy was assessed with an in-room preclinical experiment by performing 62 needle insertions on a spine phantom by an expert operator measuring entry, depth, angle, and target errors. Technical efficacy and operator performance were tested in laboratory by running an experiment with 40 novice operators (20 using freehand technique versus 20 MR-IOS-guided) with each operator inserting 10 needles into a geometric phantom. Technical efficacy was measured by comparing the success rates of needle insertions between the two operator groups. Operator performance was assessed by comparing total procedure times, total needle path distance, presumed tissue damage, and speed of individual insertions between the two operator groups.ResultsThe MR-IOS maximally altered SNR by 2% with no perceptible change in image quality or uniformity. Accuracy assessment showed mean entry error of 1.6 ± 0.6 mm, depth error of 0.7 ± 0.5 mm, angle error of 1.5 ± 1.1°, and target error of 1.9 ± 0.8 mm. Technical efficacy showed a statistically significant difference (p= 0.031) between success rates (freehand 35.0% vs. MR-IOS 80.95%). Operator performance showed: mean total procedure time of 40.3 ± 4.4 (s) for freehand and 37.0 ± 3.7 (s) for MR-IOS (p= 0.584), needle path distances of 152.6 ± 15.0 mm for freehand and 116.9 ± 8.7 mm for MR-IOS (p= 0.074), presumed tissue damage of 7,417.2 ± 955.6 mm2for freehand and 6062.2 ± 678.5 mm2for MR-IOS (p= 0.347), and speed of insertion 5.9 ± 0.4 mm/s for freehand and 4.3 ± 0.3 mm/s for MR-IOS (p= 0.003).ConclusionThe MR-IOS is compatible within a clinical MR imaging environment, accurate for needle placement, technically efficacious, and improves operator performance over the unassisted insertion technique. The MR-IOS was found to be suitable for further testing in a clinical setting.
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DOI：
10.1056/nejm198109103051104
发表时间：
1981-09
期刊：
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影响因子：
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