Search Results
Results 401 - 450 of 1314
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Cagli S - - 2009
BACKGROUND AND PURPOSE: Evaluation of the laryngeal cartilages is essential for the treatment strategy of patients with laryngeal carcinoma. Our aim was to assess the accuracy of preoperative clinical examinations and CT for preoperative evaluation. MATERIALS AND METHODS: A prospective comparative study was performed at a university department on 30 ...
Roemer Frank W - - 2009
To assess baseline factors that may predict fast tibiofemoral cartilage loss over a 30-month period. The Multicenter Osteoarthritis (MOST) study is a longitudinal study of individuals who have or who are at high risk for knee osteoarthritis. The HIPAA-compliant protocol was approved by the institutional review boards of all participating ...
Welsch Goetz H - - 2009
The purpose of this article was to evaluate the potential of in vivo zonal T2-mapping as a noninvasive tool in the longitudinal visualization of cartilage repair tissue maturation after matrix-associated autologous chondrocyte transplantation (MACT). Fifteen patients were treated with MACT and evaluated cross-sectionally, with a baseline MRI at a follow-up ...
Nakaoka Tatsuo - - 2009
PURPOSE: The cause of pectus excavatum has been hypothesized to be overgrowth of the costal cartilage. According to this theory, the length of costal cartilages must be longer in the side of deep depression in asymmetric patients. To challenge this hypothesis, we measured the lengths of ribs and costal cartilages ...
Omoumi Patrick - - 2009
CT arthrography and MR arthrography are accurate methods for the study of surface cartilage lesions and cartilage loss. They also provide information on subchondral bone and marrow changes, and ligaments and meniscal lesions that can be associated with osteoarthritis. Nuclear medicine also offers new insights in the assessment of the ...
Bittersohl Bernd - - 2009
PURPOSE: To investigate the reproducibility of dGEMRIC in the assessment of cartilage health of the adult asymptomatic hip joint. MATERIALS AND METHODS: Fifteen asymptomatic volunteers (mean age, 26.3 years +/- 3.0) were preliminarily studied. Any volunteer that was incidentally diagnosed with damaged cartilage on MRI (n = 5) was excluded. ...
Eckstein Felix - - 2009
Whereas the strength of scoring systems in osteoarthritis (OA) lies in detecting local changes, involving small parts of the structures of interest (ie, cartilage lesions), quantitative measures are powerful where minute changes occur homogeneously throughout large structures. Cartilage measurements at 1.5 or 3 Tesla are technically accurate, reproducible, and sensitive ...
Burstein Deborah - - 2009
Osteoarthritis involves ongoing degradative and healing processes that occur at the molecular level in multiple tissues in the joint in response to a number of biochemical and mechanical factors. Understanding these dynamic processes before they affect the structural aspects of the joint motivates the need for metrics to better visualize ...
Bae K T - - 2009
We developed a semi-automated method based on a graph-cuts algorithm for segmentation and volumetric measurements of the cartilage from high-resolution knee magnetic resonance (MR) images from the Osteoarthritis Initiative (OAI) database and assessed the intra- and inter-observer reproducibility of measurements obtained via this method. MR image sets from 20 subjects ...
Tetta Cecilia - - 2010
We evaluated long-term magnetic resonance imaging (MRI) features of Knee Osteochondral Autologous Transplantation (OAT)-Mosaicplasty and correlated MRI findings and clinical outcome. Twenty-four patients (mean age 29.9±8.7, 70.8% male) undergoing arthroscopic OAT between 1997 and 2000 were prospectively enrolled. The International Cartilage Repair Society (ICRS)/International Knee Documentation Committee (IKDC) scores and ...
Fripp Jurgen J CSIRO, ICTC, The Australian e-Health Research Centre-BioMedIA, Royal Brisbane and Women's Hospital, 4029 Herston, Qld., Australia. - - 2010
In this paper, we present a segmentation scheme that automatically and accurately segments all the cartilages from magnetic resonance (MR) images of nonpathological knees. Our scheme involves the automatic segmentation of the bones using a three-dimensional active shape model, the extraction of the expected bone-cartilage interface (BCI), and cartilage segmentation ...
Omoumi Patrick - - 2009
The cartilage of the lower limb joints is exposed to high levels of mechanical stress and therefore is a frequent site of degenerative and traumatic lesions. Magnetic resonance imaging (MRI) is the modality of choice for the assessment of these cartilage lesions. To date, clinically available sequences have focused on ...
Shimada Kenshu - - 2009
Using computed tomography, we discovered labial cartilages (splanchnocranial components) in an enigmatic lamniform shark, Odontaspis ferox (smalltooth sandtiger). We demonstrate that the presence of labial cartilages is plesiomorphic in Lamniformes, affirming that their "reduction" cannot be used as a synapomorphy for the order. Rather, their loss occurred through lamniform phylogeny.
Moriya S - - 2009
BACKGROUND: The three-dimensional double-echo steady-state (3D-DESS) sequence is being used to investigate sequence parameters for the assessment of knee cartilage by magnetic resonance imaging (MRI). With the flip angle (FA) values that are commonly used, contrast between cartilage and synovial fluid may be too low to delineate minor lesions of ...
Luther Jill K - - 2009
To evaluate after 12 weeks the effects of caudal medial meniscal release (MR) in the cranial cruciate ligament-intact canine stifle. Blinded, prospective in vivo study. Purpose-bred hound dogs (n=10). Either MR (n=5) or a sham (SH) surgery (n=5) was performed via arthroscopy. Orthopedic examination and subjective lameness evaluation were performed ...
Maataoui Adel - - 2010
To compare quantitative cartilage volume measurement (CVM) using different slice thicknesses. Ten knees were scanned with a 1.5T MRI (Sonata, Siemens, Erlangen, Germany) using a 3D gradient echo sequence (FLASH, fast low-angle shot). Cartilage volume of the medial and lateral tibial plateau was measured by two independent readers in 1.5mm, ...
Hofmann Gunther O GO Department of Traumatology, Friedrich Schiller University of Jena, Germany; Department of Traumatology and Orthopaedic Surgery, Trauma Center Halle (Saale), - - 2010
MRI and arthroscopy are important methods in the evaluation of cartilage pathology. But frequently initial changes of cartilage in combination with chronic knee pain cannot be detected by employing these two methods. Better diagnostic tools for the detection of the early stages of osteoarthritis (OA) are required. The objective of ...
Watanabe A - - 2009
OBJECTIVE: To examine the characteristics of cartilage degeneration in patients with recurrent patellar dislocation (RPD) following conservative treatment using delayed gadolinium-enhanced magnetic resonance imaging (MRI) of cartilage (dGEMRIC). DESIGN: This study evaluated three groups of knees: group I, 35 knees from both knees of patients with bilateral RPD and dislocated ...
Fujikawa Keita - - 2009
OBJECTIVE: To identify the significance of serum cartilage oligomeric matrix protein (COMP), a marker of cartilage turnover, in patients with early-stage rheumatoid arthritis (RA) in relation to other serologic variables and magnetic resonance imaging (MRI) features. METHODS: Ninety-eight patients with early-stage RA, whose disease duration from onset was less than ...
Chan D D - - 2009
Cartilage displacement and strain patterns were documented noninvasively in intact tibiofemoral joints in situ by magnetic resonance imaging (MRI). This study determined the number of compressive loading cycles required to precondition intact joints prior to imaging, the spatial distribution of displacements and strains in cartilage using displacement-encoded MRI, and the ...
Li Jie - - 2009
RATIONALE AND OBJECTIVES: The aim of this study was to compare high-resolution magnetic resonance (MR) arthrography and multislice computed tomographic (MSCT) arthrography in the evaluation of the entire knee cartilage obtained from cadavers. MATERIALS AND METHODS: MR arthrography and MSCT arthrography were performed on 16 cadaver knees, and their findings ...
Bittersohl B - - 2009
OBJECTIVES: To study the three-dimensional (3D) T1 patterns in different types of femoroacetabular impingement (FAI) by utilizing delayed gadolinium-enhanced magnetic resonance imaging (MRI) of cartilage (dGEMRIC) and subsequent 3D T1 mapping. We used standard grading of OA by Tonnis grade on standard radiographs and morphological grading of cartilage in MRI ...
Golding Rosemary E - - 2009
Odontophoral cartilages are located in the molluscan buccal mass and support the movement of the radula during feeding. The structural diversity of odontophoral cartilages is currently known only from limited taxa, but this information is important for interpreting phylogeny and for understanding the biomechanical operation of the buccal mass. Caenogastropods ...
Miller Elka - - 2009
Our objective was to semiquantitatively evaluate the diagnostic accuracy of MRI for evaluation of synovium and cartilage of peripheral joints in juvenile idiopathic arthritis (JIA) according to the levels of evidence and recommendations of the Canadian Task Force on Periodic Health Examination guidelines. Articles were screened using MEDLINE, EMBASE, DARE, ...
Dhollander A A M - - 2010
AIM: The present study was designed to evaluate the implantation of alginate beads containing human mature allogenic chondrocytes for the treatment of symptomatic cartilage defects of the knee. MRI was used for the morphological analysis of cartilage repair. The correlation between MRI findings and clinical outcome was also studied. METHODS: ...
Welsch G H - - 2009
The aim of the present pilot study is to show initial results of a multimodal approach using clinical scoring, morphological magnetic resonance imaging (MRI) and biochemical T2-relaxation and diffusion-weighted imaging (DWI) in their ability to assess differences between cartilage repair tissue after microfracture therapy (MFX) and matrix-associated autologous chondrocyte transplantation ...
Hunter D J - - 2009
OBJECTIVE: To ascertain the contribution of articular cartilage morphometry and meniscal position on MRI to joint space width (JSW) measured in the Lyon schuss radiograph of the knee. DESIGN: 62 obese women with knee OA and 99 non-obese female controls (mean age 56.6 years) were imaged using 3T MRI and ...
Watanabe A - - 2009
To investigate the ability of delayed gadolinium-enhanced magnetic resonance (MR) imaging of cartilage (dGEMRIC) and T2 mapping to evaluate the quality of repair tissue after microfracture. Twelve knees from 12 goats were studied. An osteochondral defect (diameter, 6mm; depth, 3mm) with microfracture was created in the weight-bearing aspect of both ...
Liu Sirun - - 2010
The purpose of this study was to examine gadolinium-enhanced magnetic resonance imaging (MRI) for monitoring cartilage degeneration. This is a proof-of-concept study in an animal model. Adult New Zealand rabbits were randomly stratified into five groups. Papain was injected intra-articularly in the right knee in four groups to establish the ...
Dugar Arushi A Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts, - - 2009
The delayed Gadolinium-Enhanced Magnetic Resonance Imaging of Cartilage (dGEMRIC) method allows for both qualitative and quantitative measurement of the spatial distribution of glycosaminoglycan [GAG] in excised cartilage. The objective of this study was to determine the effect of paraformaldehyde fixation on dGEMRIC measurements. Five bovine and seven human cartilage pieces ...
Chand Gyan - - 2009
Arthropathy is a well known side effect of the iron chelator deferiprone (L1); however, the imaging findings in deferiprone-induced arthropathy are not well known. In this article, we describe the typical radiographic and MRI findings in a patient receiving regular blood transfusions who developed arthropathy after long-term therapy with the ...
Terada Masatsugu - - 2009
Congenital tracheal stenosis (CTS) is a rare but life-threatening disorder, particularly in neonates and infants. The stenotic lesions are commonly composed of complete rings of cartilage varying in length, location, and severity. A definitive diagnosis of CTS may be delayed because of the rarity of this disorder and thus its ...
Trattnig S - - 2009
Chondral injuries are common lesions of the knee joint, and many patients could benefit from cartilage repair. Widespread cartilage repair techniques require sophisticated noninvasive follow-up using MRI. In addition to the precise morphological assessment of this area of cartilage repair, the cartilage's biochemical constitution can be determined using biochemical MRI ...
Taylor Carmen C Department of Radiology, University of California, San Francisco, CA 94158, USA. - - 2009
Evaluation of glycosaminoglycan (GAG) concentration in articular cartilage is of particular interest to the study of degenerative joint diseases such as osteoarthritis (OA). Noninvasive imaging techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) have demonstrated the potential to assess biochemical markers of cartilage integrity such as GAG ...
Black Brandon R - - 2009
Magnetic resonance imaging (MRI) using cartilage-sensitive sequences has been shown to be an accurate, noninvasive method by which to detect articular cartilage injury and early degeneration. These are important management considerations in an athletic population. The advantages of MRI include the lack of ionizing radiation, direct multiplanar capabilities and high-contrast ...
Hunter David J - - 2009
PURPOSE OF REVIEW: To review radiographic and MRI developments in measuring osteoarthritis progression in the tibiofemoral compartment of the knee. RECENT FINDINGS: Standardized techniques for measuring joint space width in the medial tibiofemoral compartment, using standardized radiographic protocols, have become accepted for quantifying changes in tibiofemoral in knee osteoarthritis. In ...
Brem M H - - 2009
Software-based image analysis is important for studies of cartilage changes in knee osteoarthritis (OA). This study describes an evaluation of a semi-automated cartilage segmentation software tool capable of quantifying paired images for potential use in longitudinal studies of knee OA. We describe the methodology behind the analysis and demonstrate its ...
Martí-Bonmatí Luis - - 2009
Normal and degenerated cartilages have different magnetic resonance (MR) capillary permeability (K(trans)) and interstitial interchangeable volume (v(e)). Our hypothesis was that glucosamine sulfate treatment modifies these neovascularity abnormalities in osteoarthritis. Sixteen patients with patella degeneration, randomly distributed into glucosamine or control groups, underwent two 1.5-Tesla dynamic contrast-enhanced MR imaging studies ...
Potter Hollis G - - 2009
Standardized, validated magnetic resonance imaging sequences that are sensitive for articular cartilage are available for clinical use in magnetic resonance imaging units. Whereas two-dimensional sequences are helpful in the assessment of repair morphology, three-dimensional sequences with isotropic voxels measure cartilage volumes and provide an accurate assessment of fill following repair. ...
Guermazi Ali - - 2009
Osteoarthritis is the most common joint disorder worldwide, and it has an enormous socioeconomic impact both in the United States and throughout the world. Conventional radiography is the simplest and least expensive imaging method for assessing osteoarthritis of the knee. Radiography is able to directly visualize osseous features of osteoarthritis, ...
Burstein Deborah - - 2009
The ability to track longitudinal changes in knee degeneration and repair is critical to understanding the natural history of joint disease as well as the impact of therapeutics and lifestyle interventions. Traditionally, longitudinal changes in the knee have been monitored with radiography, which focuses on relatively late disease progression. The ...
Maizlin Zeev V - - 2009
The evaluation of articular cartilage currently relies primarily on the identification of morphological alterations of the articular cartilage. Unlike anatomic imaging, T2 mapping is sensitive to changes in the chemical composition and structure of the cartilage. Clinical evaluation of T2 mapping of the glenohumeral joint has not been previously reported. ...
Sun Dong Il - - 2009
OBJECTIVE: To evaluate the postoperative laryngeal CT findings of neoarytenoid soft tissue at an arytenoidectomy site during a supracricoid partial laryngectomy, and to compare its thickness to the mucosa over the spared arytenoid cartilage. MATERIALS AND METHODS: Thirty-one patients underwent a supracricoid partial laryngectomy with (n = 14) or without ...
Potter Hollis G - - 2009
Standardized magnetic resonance imaging (MRI) pulse sequences provide an accurate, reproducible assessment of cartilage morphology. Three-dimensional (3D) modeling techniques enable semiautomated models of the joint surface and thickness measurements, which may eventually prove essential in templating before partial or total joint resurfacing as well as focal cartilage repair. Quantitative MRI ...
Henderson S N - - 2009
Beak trimming is necessary in commercial broiler breeders to prevent or decrease trauma as they mature. Two common beak-trimming methods were evaluated by early performance comparison with nontrimmed chicks (NBT). The robotic electrocautery device (ECD) trims and cauterizes the beak tip. The robotic infrared beak-trimming device (IBT) applies an infrared ...
Eckstein Felix - - 2009
INTRODUCTION: The aim was to investigate the relationship of cartilage loss (change in medial femorotibial cartilage thickness measured with magnetic resonance imaging (MRI)) with compartment-specific baseline radiographic findings and MRI cartilage morphometry features, and to identify which baseline features can be used for stratification of fast progressors. METHODS: An age ...
Zaragoza Edward - - 2009
Recent reports have demonstrated magnetic resonance imaging (MRI) as a promising technique in detecting articular cartilage lesions of the hip joint. The purpose of our study was to evaluate the diagnostic performance of MRI with gadolinium arthrography in detecting acetabular cartilage delamination in patients with pre-arthritic hip pain. 46 patients ...
Meredith Dennis S - - 2009
In this cross-sectional study, we conducted a comprehensive assessment of all articular elements that could be measured using knee MRI. We assessed the association of pathological change in multiple articular structures involved in the pathoanatomy of osteoarthritis. Knee MRI scans from patients over 45 years old were assessed using a ...
Dam Erik B - - 2009
INTRODUCTION: At present, no disease-modifying osteoarthritis drugs (DMOADS) are approved by the FDA (US Food and Drug Administration); possibly partly due to inadequate trial design since efficacy demonstration requires disease progression in the placebo group. We investigated whether combinations of biochemical and magnetic resonance imaging (MRI)-based markers provided effective diagnostic ...
Welsch Goetz H - - 2009
The objective of this study was to use advanced MR techniques to evaluate and compare cartilage repair tissue after matrix-associated autologous chondrocyte transplantation (MACT) in the patella and medial femoral condyle (MFC). Thirty-four patients treated with MACT underwent 3-T MRI of the knee. Patients were treated on either patella (n ...
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