Comparison of image quality in magnetic resonance imaging of the knee at 1.5 and 3.0 Tesla using 32-channel receiver coils

Abstract

We examined to what degree the visualization of anatomic structures in the human knee is improved using 3.0-T magnetic resonance imaging (MRI) and many element RF receive coils as compared to 1.5 T. We imaged 20 knees at 1.5 and 3.0 T using T2-weighted STIR, T2-weighted gradient echo, T1-weighted spin-echo, true-FISP and T2-weighted fast spin echo techniques in conjunction with 32-element RF coil arrays. The 3.0-T examination was considerably faster than its 1.5-T counterpart. A superior subjective visibility at 3.0 T vs 1.5 T was found in 27 of 50 evaluated structures (meniscus, ligaments) with the exception of true-FISP techniques. The 3.0-T examination provided a better visibility (evaluated by blinded consensus-reading by two radiologists) of small structures such as the ligamentum transversum genu. Also, cartilage was better delineated at 3.0 T. A 23% increased average signal-to-noise ratio as assessed using a temporal filter was observed at 3.0 T as compared to 1.5 T. At 3.0 T, imaging of the human knee is faster and results in a subjective visibility of anatomic structures that is superior to and competitive with 1.5 T.

Feasibility of high-resolution one-dimensional relaxation imaging at low magnetic field using a single-sided NMR scanner applied to articular cartilage

“…Such coil systems need to be optimized for the actual geometry of the joint under investigation, possibly allowing for a range of dimensions to cover a range of patients in the routine clinic MRI workflow. Another promising approach for improving spatial resolution with acceptable signal to noise level is the use of multicoil arrays [17]. A further problem for commercial scanners is the short transverse relaxation time T 2 of cartilage compared to most other types of tissue, which limits the applicability of common pulse sequences due to the restriction in gradient strength.…”

Potential Impact of a 32-Channel Receiving Head Coil Technology on the Results of a Functional MRI Paradigm

“…as the data acquisition and processing capabilities of modern magnetic resonance imaging scanners advance, there is a trend toward the use of multielement coils with a higher number of coil elements for magnetic resonance imaging (Mri) in general [1][2][3][4][5][6][7][8][9][10][11] and functional magnetic resonance imaging (fMri) in particular [12]. Two possible benefits for the use of higher-element coils have been discussed in the scientific community.…”

MRI of the knees in asymptomatic adolescent soccer players: A case-control study

“…Since their release, high-field, 3.0T MRI scanners have exhibited high accuracy and are considered superior to lower-field MRI for detection of osteoarticular and musculoskeletal knee injuries, particularly cartilage defects. [21][22][23][24][25][26][27][28][29] It is possible that studying the knees of asymptomatic soccer players using high-field MRI could detect early abnormalities that are potentially reversible and which are imperceptible using low magnetic field scanners, thereby allowing the institution of prophylactic or readaptive measures or even indicating that the athlete should temporarily refrain from training.…”