Relationship between knee alignment and T1ρ values of articular cartilage and menisci in patients with knee osteoarthritis.

Objective: To assess the relationship between knee alignment and subregional T1ρ values of the femorotibial cartilage and menisci in patients with mild (Kellgren-Lawrence grade 1) to moderate (KL3) osteoarthritis (OA) at 3T.

Materials And Methods: 26 subjects with a clinical diagnosis of KL1-3 OA were included and subdivided into three subgroups: varus, valgus, and neutral. All subjects were evaluated on a 3T MR scanner.

T1rho MRI of menisci and cartilage in patients with osteoarthritis at 3T.

Objective: To assess and compare subregional and whole T1rho values (median±interquartile range) of femorotibial cartilage and menisci in patients with doubtful (Kellgren-Lawrence (KL) grade 1) to severe (KL4) osteoarthritis (OA) at 3T.

Materials And Methods: 30 subjects with varying degrees of OA (KL1-4, 13 females, 17 males, mean age±SD=63.9±13.

Assessment of subchondral bone marrow lipids in healthy controls and mild osteoarthritis patients at 3T.

The compartment-specific lipid changes in femoral-tibial bone of healthy controls and mild osteoarthritis (OA) patients were quantified at 3.0 T. Healthy volunteers [Kellgren-Lawrence (KL) grade = 0; n = 15, 4 females, 11 males, mean age 39 ± 16 years, age range = 24-78 years] and mild OA patients (KL = 1, 2; n = 26, 12 females, 14 males, mean age 61 ± 14 years, age range = 27-80 years) were scanned on a 3 T scanner.

MRI features of cortical desmoid in acute knee trauma.

Objective: The purpose of this study was to describe the MRI features of cortical desmoids associated with acute trauma.

Conclusion: Marrow edema, periostitis, and adjacent soft-tissue edema can be seen in cases of cortical desmoid associated with acute trauma.

Synovial plicae of the hip: evaluation using MR arthrography in patients with hip pain.

Objective: The appearance and distribution of the intra-articular plicae of the hip have been addressed in few reports in the anatomic and radiological literature. This study aims to determine the prevalence of visible synovial hip plicae using MR arthrography and to measure the association of visible synovial hip plicae with MR arthrographic diagnosis of labral tears, femoroacetabular impingement, and osteoarthritis.

Materials And Methods: Following institutional review board approval, 63 direct MR arthrographic examinations of the hip in 61 patients with a clinical history of hip pain were retrospectively reviewed by two experienced musculoskeletal radiologists in consensus.

MR imaging of entrapment neuropathies of the lower extremity. Part 1. The pelvis and hip.

Entrapment neuropathies can manifest with confusing clinical features and therefore are often underrecognized and underdiagnosed at clinical examination. Historically, electrophysiologic evaluation has been considered the mainstay of diagnosis. Today, cross-sectional imaging, particularly magnetic resonance (MR) imaging and specifically MR neurography, plays an increasingly important role in the work-up of entrapment neuropathies.

MRI of the wrist at 7 tesla using an eight-channel array coil combined with parallel imaging: preliminary results.

Purpose: To determine the feasibility of performing MRI of the wrist at 7 Tesla (T) with parallel imaging and to evaluate how acceleration factors (AF) affect signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and image quality.

Materials And Methods: This study had institutional review board approval. A four-transmit eight-receive channel array coil was constructed in-house.

In vivo 7.0-tesla magnetic resonance imaging of the wrist and hand: technical aspects and applications.

Magnetic resonance imaging (MRI) at 7.0 T has the potential for higher signal-to-noise ratio (SNR), improved spectral resolution, and faster imaging compared with 1.5-T and 3.

MRI of the distal biceps femoris muscle: normal anatomy, variants, and association with common peroneal entrapment neuropathy.

Objective: The objectives of our study were to describe the previously unreported normal MR anatomy of the distal biceps femoris muscle and its relationship with the common peroneal nerve and to present a case in which previously unreported MR evidence of an anatomic variation in the distal biceps femoris muscle was associated with common peroneal entrapment neuropathy.

Materials And Methods: One hundred consecutive 1.5-T knee MR studies of 97 asymptomatic patients were retrospectively reviewed by two observers in consensus for, first, normal anatomy of the distal biceps femoris muscle; second, anatomic variations of the muscle; and, third, the relationship of the muscle to the common peroneal nerve.