Anterior cruciate ligament tear: prospective evaluation of diagnostic accuracy of middle- and high-field-strength MR imaging at 1.5 and 0.5 T.

Ad, Vellet; Lee, D H; Pl, Munk; Hewett, Lara; Eliasziw, Michael; Dunlavy, S.; Vidito, L; Fowler, Peter; Miniaci, Anthony; Amendola, Annunziato

doi:10.1148/radiology.197.3.7480763

Cited by 60 publications

(30 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The mean qualitative score for lesion conspicuity for both readers and the quantitative SDNRs were significantly lower for the .2-T system for both T1-and T2-weighted images. This fact has already been demonstrated by other investigators for knee examinations (15)(16)(17)(18).…”

Section: Discussionsupporting

confidence: 74%

“…Several reports have evaluated the accuracy of low and mid field scanners in abnormalities of the knee, with little attention to the foot and ankle (15)(16)(17)(18)(19), although the value of MRI has been demonstrated in bone injuries, tendon tears, avascular necrosis and osteochondritis dissecans, chronic instability, diabetic osteoarthropathy, and osteomyelitis. The mean qualitative score for lesion conspicuity for both readers and the quantitative SDNRs were significantly lower for the .2-T system for both T1-and T2-weighted images.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

MRI of the foot and ankle: Diagnostic performance and patient acceptance of a dedicated low field MR scanner

Verhoek

Zanetti

Duewell

et al. 1998

Magnetic Resonance Imaging

View full text Add to dashboard Cite

The objective of this study was to compare image quality and patient acceptance of a dedicated .2-T MR system and a 1.0-T whole body system. Forty-one consecutive patients referred for MRI of the foot or ankle were prospectively examined with a dedicated .2-T low field system and a 1.0-T whole body system. Images were evaluated qualitatively by two observers and quantitatively using signal-difference-to-noise ratios. The patients were interviewed with respect to positioning, examination time, noise, claustrophobia, confidence in the diagnosis, and willingness to repeat the examination, using a questionnaire. The qualitative score was significantly higher for the 1.0-T system (2.6 vs 2.2 for reader 1 [P = .008] and 2.6 vs 1.7 for reader 2 [P < .0001]), respectively). The signal-difference-to-noise ratios were also superior for the 1.0-T MR system (2.96 vs .88, P < .0001). However, 96% of the lesions visualized at 1.0 T were also detected with the low field system. Patient acceptance was significantly better for the 1.0-T MR scanner (48.6 vs 43.9, P = .007). Image quality of the dedicated low field system was inferior to the 1.0-T system using objective parameters, and patients did not prefer the low field system. Although only 4% of lesions were missed in this series, the low field MR system can only be recommended when funding is limited and the available space is limited.

show abstract

Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

MRI of the foot and ankle: Diagnostic performance and patient acceptance of a dedicated low field MR scanner

Verhoek

Zanetti

Duewell

et al. 1998

Magnetic Resonance Imaging

View full text Add to dashboard Cite

show abstract

“…This can be achieved by using a low field dedicated extremity MRI system with a short data acquisition protocol [8,9]. Although the low field strength and shortening of the MRI protocol reduce image quality compared with a standard MRI examination, it has been demonstrated that lower magnetic field strength does not substantially reduce the diagnostic performance for most traumatic knee abnormalities [1,[10][11][12]. The information obtained from MRI could be sufficient to reduce the time to completion of the diagnostic workup and to influence the treatment strategy.…”

Section: Introductionmentioning

confidence: 99%

Costs and effectiveness of a brief MRI examination of patients with acute knee injury

et al. 2008

View full text Add to dashboard Cite

The aim of this study was to assess the costs and effectiveness of selective short magnetic resonance imaging (MRI) in patients with acute knee injury. A model was developed to evaluate the selective use of MRI in patients with acute knee injury and no fracture on radiography based on the results of a trial in which 208 patients were randomized between radiography only and radiography plus MRI. We analyzed medical (diagnostic and therapeutic) costs, quality of life, duration of diagnostic workup, number of additional diagnostic examinations, time absent from work, and time to convalescence during a 6-month follow-up period. Quality of life was lowest (EuroQol at 6 weeks 0.61 (95% CI 0.54-0.67)); duration of diagnostic workup, absence from work, and time to convalescence were longest; and the number of diagnostic examinations was largest with radiography only. These outcomes were more favorable for both MRI strategies (EuroQol at 6 weeks 0.72 (95% CI 0.67-0.77) for both). Mean total costs were 2,593 euros (95% CI 1,815-3,372) with radiography only, 2,116 euros (95% CI 1,488-2,743) with radiography plus MRI, and 1,973 euros (95% CI 1,401-2,543) with selective MRI. The results suggest that selective use of a short MRI examination saves costs and potentially increases effectiveness in patients with acute knee injury without a fracture on radiography.

show abstract

“…Although a higher-field strength is supposed to confer higher accuracy in the diagnosis of ACL tears, Vellet et al could not prove a higher accurancy comparing 0.5 and 1.5 T MR imaging [45]. Recently high-field strength 3 T imaging has become available for routine clinical use.…”

Section: Discussionmentioning

confidence: 99%

2D and 3D 3-tesla magnetic resonance imaging of the double bundle structure in anterior cruciate ligament anatomy

Steckel

Vadalà

Davis

et al. 2006

Knee Surg Sports Traumatol Arthrosc

View full text Add to dashboard Cite

For anterior cruciate ligament (ACL) surgery using the anatomic approach of the double bundle concept it is helpful to describe the anteromedial (AM) and posterolateral (PL) bundle using Magnetic Resonance Imaging (MRI), since this is the most important preoperative parameter next to the physical examination. The aim of this study was to distinguish both bundles in MRI. In a prospective study we evaluated the double bundle structure in ACL anatomy with a 3-T ultra-high-field strength MR imaging of cadaver knees, which allows faster imaging times, increased resolution and increased signal-to-noise ratio. Using oblique sagittal and oblique coronal planes, we were able to distinguish the double bundle structure in each knee. The following arthroscopic evaluation of the knees confirmed our MRI findings. Our study demonstrates the possibility of distinguishing the two bundles in the native ACL with 3T MRI. Following examinations must study the value for clinical application by describing different rupture patterns of the bundles and correlating this to arthroscopy. It would be advantageous to know the rupture pattern in advance. Presurgical planning could be improved by reconstructing only the torn and preserving the intact bundle.

show abstract

Anterior cruciate ligament tear: prospective evaluation of diagnostic accuracy of middle- and high-field-strength MR imaging at 1.5 and 0.5 T.

Abstract: Higher field strength does not confer higher accuracy in the diagnosis of ACL tears at MR imaging.

Cited by 60 publications

References 0 publications

MRI of the foot and ankle: Diagnostic performance and patient acceptance of a dedicated low field MR scanner

MRI of the foot and ankle: Diagnostic performance and patient acceptance of a dedicated low field MR scanner

Costs and effectiveness of a brief MRI examination of patients with acute knee injury

2D and 3D 3-tesla magnetic resonance imaging of the double bundle structure in anterior cruciate ligament anatomy

Contact Info

Product

Resources

About