Romaneehsen B, Oberholzer K, Müller L P, Kreitner K-F
Klinik und Poliklinik für Radiologie, Johannes Gutenberg-Universität Mainz.
Rofo. 2003 Sep;175(9):1193-7. doi: 10.1055/s-2003-41926.
To investigate the feasibility of using multiple receiver coil elements for time saving integrated parallel imaging techniques (iPAT) in traumatic musculoskeletal disorders.
6 patients with traumatic derangements of the knee, ankle and hip underwent MR imaging at 1.5 T. For signal detection of the knee and ankle, we used a 6-channel body array coil that was placed around the joints, for hip imaging two 4-channel body array coils and two elements of the spine array coil were combined for signal detection. All patients were investigated with a standard imaging protocol that mainly consisted of different turbo spin-echo sequences (PD-, T (2)-weighted TSE with and without fat suppression, STIR). All sequences were repeated with an integrated parallel acquisition technique (iPAT) using a modified sensitivity encoding (mSENSE) technique with an acceleration factor of 2. Overall image quality was subjectively assessed using a five-point scale as well as the ability for detection of pathologic findings.
Regarding overall image quality, there were no significant differences between standard imaging and imaging using mSENSE. All pathologies (occult fracture, meniscal tear, torn and interpositioned Hoffa's cleft, cartilage damage) were detected by both techniques. iPAT led to a 48 % reduction of acquisition time compared with standard technique. Additionally, time savings with iPAT led to a decrease of pain-induced motion artifacts in two cases.
In times of increasing cost pressure, iPAT using multiple coil elements seems to be an efficient and economic tool for fast musculoskeletal imaging with diagnostic performance comparable to conventional techniques.
探讨在创伤性肌肉骨骼疾病中使用多个接收线圈元件以节省时间的集成并行成像技术（iPAT）的可行性。
6例膝关节、踝关节和髋关节创伤性紊乱患者在1.5T磁场下接受磁共振成像检查。对于膝关节和踝关节的信号检测，我们使用一个放置在关节周围的6通道体部阵列线圈；对于髋关节成像，将两个4通道体部阵列线圈和脊柱阵列线圈的两个元件组合用于信号检测。所有患者均采用主要由不同的快速自旋回波序列（质子密度加权、有无脂肪抑制的T2加权快速自旋回波、短TI反转恢复序列）组成的标准成像方案进行检查。所有序列均采用集成并行采集技术（iPAT）重复进行，使用具有2倍加速因子的改良灵敏度编码（mSENSE）技术。使用五点量表主观评估整体图像质量以及检测病理结果的能力。
关于整体图像质量，标准成像与使用mSENSE成像之间无显著差异。两种技术均能检测到所有病变（隐匿性骨折、半月板撕裂、 Hoffa裂伤撕裂和嵌入、软骨损伤）。与标准技术相比，iPAT使采集时间减少了48%。此外，iPAT节省的时间使两例患者因疼痛引起的运动伪影减少。
在成本压力不断增加的时代，使用多个线圈元件的iPAT似乎是一种高效且经济的工具，可用于快速肌肉骨骼成像，其诊断性能与传统技术相当。
