Masciocchi C, Mastantuono M, De Bac S, Barile A, Satragno L, Lupattelli L, Passariello R
Cattedra di Radiologia Università degli Studi de L'Aquila, La Sapienza, Roma.
Radiol Med. 1995 May;89(5):593-9.
Magnetic Resonance Imaging (MRI) has had a significant impact on the diagnosis of musculoskeletal conditions. Technologic advances in the last years allowed the development of cost-effective, compact and easy-to-install MR systems. After an early phase to optimize the units, a 14-month multicentric study was performed to define the possible clinical applications of the system. The obtained data are reported by the authors in the present study to assess the diagnostic accuracy of the new MR system for the study of the limbs. The system consists of an 0.2 T permanent unit, weighting 800 Kg, with a built-in radiofrequency shield and 10 mT/m gradients. October, 1992, to February, 1994, 2437 limbs examinations were carried out in patients whose age ranged 5 to 83 years. In 93% of cases, the exam was performed to study one joint, mostly the knee. MR diagnosis was verified in 311 patients, who were subsequently submitted to surgery. Quite satisfying overall results were obtained, particularly in case of knee traumas, comparable to those provided by units with more potentials. The particular structure of the magnet allowed the comfortable management of the pediatric, aged and acute patients. Nevertheless, in 3% of the investigated knee or elbow conditions, the examinations could not be performed due to technical limitations related to magnet size. In addition, the authors believe that a limited field of view (11-16 cm) does not allow accurate staging of the malignant lesions involving soft tissue and bone, which require a wider locoregional staging.
磁共振成像（MRI）对肌肉骨骼疾病的诊断产生了重大影响。过去几年的技术进步使得开发出了经济高效、紧凑且易于安装的MR系统成为可能。在对设备进行早期优化阶段之后，开展了一项为期14个月的多中心研究，以确定该系统可能的临床应用。作者在本研究中报告了所获得的数据，以评估新MR系统对四肢疾病研究的诊断准确性。该系统由一台0.2T的永磁设备组成，重800千克，带有内置射频屏蔽和10mT/m的梯度。1992年10月至1994年2月，对年龄在5至83岁的患者进行了2437例四肢检查。在93%的病例中，检查是为了研究一个关节，主要是膝关节。对311例患者进行了MR诊断，并随后进行了手术。总体结果相当令人满意，尤其是在膝关节创伤的情况下，与更具潜力的设备所提供的结果相当。磁体的特殊结构便于对儿科、老年和急性患者进行舒适的检查。然而，在3%的被调查膝关节或肘关节疾病中，由于与磁体尺寸相关的技术限制，无法进行检查。此外，作者认为有限的视野（11 - 16厘米）不允许对涉及软组织和骨骼的恶性病变进行准确的分期，而这需要更广泛的局部区域分期。
