July 03 News Headlines

These are radiology news updates from other sites

Date this page was last updated: 01/07/2007 03:02:39 PM

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July 31, 2003   Temporomandibular joint osteoarthrosis diagnosed with high resolution ultrasonography versus magnetic resonance imaging: how reliable is high resolution ultrasonography? - Journal of Oral Rehabilitation Conclusion: In view of the fact that the 12·5 MHz US technique proved to be a valuable diagnostic aid for the detection and prediction of abnormal condylar morphology, the results of this study should be of further interest and encourage research in its potential uses and diagnostic capabilities...   The value of sensitive imaging modalities in rheumatoid arthritis - Arthritis Research & Therapy High-frequency ultrasound, with or without power Doppler, and magnetic resonance imaging of rheumatoid joints permit an increasingly refined analysis of anatomic detail. However, further research using these sensitive imaging technologies is required to delineate pathophysiological correlates of imaging abnormalities and to standardise methods for assessment... July 30, 2003

July 30, 2003     Case Report: Musculoskeletal case - Canadian Journal of Surgery A 48-year-old man was referred to hospital because of instability and swelling of the left shoulder, associatedwith a worsening decrease of sensation in the left upper limb. These symptoms had developed gradually over 2 years...   Solitary Hot Spots in the Ribs on Bone Scan: Value of Thin-Section Reformatted Computed Tomography To Exclude Radiography-Negative Fractures - Journal of Computer Assisted Tomography Conclusions: Thin-section reformatted helical CT delineated minute, radiographically occult fractures of the rib. Excluding fractures, helical CT can avoid further unnecessary examinations ...   Enhanced localization of osteoid osteoma with radiolabeling and intraoperative gamma counter guidance: A case report - Hand Surgery The defect was packed with cancellous bone graft taken from the ipsilateral distal radius through the same wound. Postoperative recovery was very satisfactory. We found this approach useful in limiting resection margin and surgical site morbidity in resection of osteoid osteoma... July 29, 2003   Insufficiency fracture. A survey of 60 cases and review of the literature - Joint, Bone, Spine Radiography showed a fracture line or osteocondensation in 65% of cases. Scintigraphy was positive in 87.5% of cases, showing a fracture line or a callus. Bone computed tomography (CT) scan was positive in 98.1% of cases. IF occurs in elderly women with osteoporosis and most commonly in the pelvis...   Neural Fibrolipoma of the Foot - Journal of Computer Assisted Tomography Neural fibrolipoma is a benign tumor comprised of hypertrophied fibrofatty tissue with intermixed nerve tissue. We present the case of a neural fibrolipoma of the foot that underwent above-ankle amputation and review the characteristic features of this unique form of localized gigantism...   Artifacts from Dental Casting Alloys in Magnetic Resonance Imaging - Journal of Dental Research We concluded that selection of specific dental casting alloys according to their elemental compositions could minimize the metal artifacts in MRI; however, titanium alloys currently pose a problem with respect to causing MRI artifacts...

July 28, 2003   Bone marrow edema syndrome of the knee: a case report and review of the literature - The Knee The authors present a 45-year-old man with bone marrow edema syndrome (BMES) of the medial condyle of the knee. Early diagnosis of BMES was based upon clinical, bone scintigraphy and magnetic resonance (MRI) findings. After failure of the conservative treatment, core decompression was performed. Histological examination showed no evidence of osteoporosis or osteonecrosis. Within 2 months after the operation, the patient was pain-free and he resumed his previous activities. At 1-year follow-up examination, MRI showed complete resolution of all signal abnormalities; at 3-year follow-up the patient remained symptom-free and with no functional limitations... July 25, 2003   Communicating defects of the triangular fibrocartilage complex without disruption of the triangular fibrocartilage: A report of two cases - Hand Surgery Conclusion: We present 2 cases that illustrate the diagnosis, the use of both magnetic resonance imaging and arthrography to confirm the diagnosis, the associated dorsal ulnar cutaneous nerve pain distribution, and the open direct and retinacular flap repair...   Transverse carpal ligament disruption associated with simultaneous fractures of the trapezium, trapezial ridge, and hook of hamate: A case report - Hand Surgery Conclusion: Traumatic disruption of the transverse carpal ligament associated with fractures of the trapezial ridge and hook of hamate is a known entity. Only one report of a coronal fracture of the trapezium has been mentioned in the literature. We report a combination of these two injury patterns. Diagnosis was aided by computed tomography. Treatment involved excision of the trapezial ridge and hook of hamate fragments with lag screw fixation of the trapezial body fracture... July 24, 2003   Bone Loss and Bone Size after Menopause - New England Journal of Medicine Conclusion: Increased bone loss after menopause is associated with increased periosteal apposition, which partially preserves bone strength. A strength index may be a helpful predictor of the risk of fracture...   Commentary: Periosteal Bone Formation - A Neglected Determinant of Bone Strength - New England Journal of Medicine Life forms that have low body mass can hunt for food on the undersurface of branches or along shear cliff faces quite unperturbed by gravity. For larger animals, the hunt for dinner and the struggle to avoid becoming someone else's meal require rapid movement against gravity. This need is met by the lever function of long bones, three-dimensional masterpieces of biomechanical engineering that, by their material composition and structural design, achieve the contradictory properties of stiffness and flexibility, strength and lightness...

July 23, 2003   Localized Nodular Synovitis of the Knee: MR Imaging Appearance and Clinical Correlates in 21 Patients - American Journal of Roentgenology Localized nodular synovitis of the knee predominantly involves the infrapatellar fat pad. It may produce symptoms related to mechanical derangement of the knee. Although there is no typical MR appearance for this lesion, many features help to differentiate it from pigmented villonodular synovitis...   MR Imaging of Bone Marrow Edema and Joint Effusion in Patients with Osteonecrosis of the Femoral Head: Relationship to Pain - American Journal of Roentgenology Both bone marrow edema and joint effusions existed with a peak occurrence in stage III disease. Bone marrow edema seems to have a stronger association with pain than does joint effusion in osteonecrosis of the femoral head...   Fat suppression gradient-echo magnetic resonance imaging of experimental articular cartilage lesions: Comparison between phase-contrast method at 0.23T and chemical shift selective method at 1.5T - Journal of Magnetic Resonance Imaging Phase-contrast method for fat suppression at 0.23T is a useful technique in detecting articular cartilage lesions...   Case Report: HIV-1 transmission during scintigraphy - The Lancet HIV is transmitted sexually, via blood, and across the placental barrier. Patient A had an open fracture of his right leg in October, 1996. In August, 1997, he underwent osteosynthesis of the right tibia, and then developed septic pseudoarthrosis... July 22, 2003   Building on the X-ray: Musculoskeletal Imaging - Decisions in Imaging Economics With its roots in plain film, the field of musculoskeletal imaging has evolved to include many new applications for MRI, CT, ultrasound, and nuclear medicine...

July 18, 2003   Measuring mechanical properties of the vastus lateralis tendon-aponeurosis complex in vivo by ultrasound imaging - Scandinavian Journal of Medicine and Science in Sports Conclusion: These data demonstrate that when applying the newly established ultrasound-based method of investigating quadriceps connective tissue mechanical properties, maximal isometric contraction is inevitably associated with some joint angular motion that significantly influences the calculations...   Ultrasound guidance allows accurate needle placement and aspiration from small joints in patients with early inflammatory arthritis - Rheumatology Conclusions: The use of high frequency ultrasound to guide needle placement within a small joint allows for significantly greater accuracy than a palpation-guided approach. When followed by lavage, synovial fluid cells and diluted synovial fluid can be obtained from the majority of small joints. This has important clinical and research implications...   Magnetic resonance imaging of peripheral osteoarticular tuberculosis compared with sonography and standard radiographs - Rheumatology International Conclusion:We report a case of TBC arthritis of the knee in which magnetic resonance tomography (MRI) provided images suggestive of this finding, in contrast to plain radiographs and joint sonography. The diagnosis was confirmed with culture for tuberculous bacilli. As far as we know, this is the first study comparing radiographs, joint sonography, and MRI...

July 16, 2003   Structural and Symptomatic Efficacy of Glucosamine and Chondroitin in Knee Osteoarthritis: A Comprehensive Meta-analysis - Archives of Internal Medicine Conclusion: Our study demonstrates the structural efficacy of glucosamine and indistinguishable symptomatic efficacies for both compounds. Regarding the relatively sparse data on glucosamine and joint space narrowing and the absence of data on structural effects of chondroitin, further studies are needed to investigate the relationship among time, dose, patient baseline characteristics, and structural efficacy for an accurate, disease-modifying characterization of these 2 compounds... July 15, 2003   Hand bone densitometry in rheumatoid arthritis, a five year longitudinal study: an outcome measure and a prognostic marker - Annals of Rheumatic Diseases Conclusion: Early loss of hand BMC in patients with RA is a composite marker of disease activity and functional status and can predict poor functional outcome...   Cryptococcal osteomyelitis - Applied Radiology A 51-year-old man presented to the emergency department with chest pain radiating to the right shoulder. The pain had been present for several months but had become refractory to analgesics...   Cryptococcal osteomyelitis - Applied Radiology A 51-year-old man presented to the emergency department with chest pain radiating to the right shoulder. The pain had been present for several months but had become refractory to analgesics...

July 14, 2003   Model Studies on Acetabular Component Migration in Total Hip Arthroplasty using Ct and a Semiautomated Program for Volume Merging - Acta Radiologica Conclusion: The accuracy of this non-invasive method out-performs routine plain radiography. The method gives both visual and numerical correlates to migration and can be used in clinical practice... July 11, 2003   Extracorporeal shock wave therapy for plantar fasciitis: randomised controlled multicentre trial - British Medical Journal Conclusion: Extracorporeal shock wave therapy is ineffective in the treatment of chronic plantar fasciitis... July 10, 2003   Prediction of primary reparability of massive tears of the rotator cuff on preoperative magnetic resonance imaging - Journal of Shoulder and Elbow Surgery Conclusion: Primary repair was often not feasible when both the length and width of the tear exceeded 40 mm on a preoperative magnetic resonance image, when the supraspinatus muscle was thin at the superior margin of the glenoid, and when a high signal intensity was observed in the infraspinatus muscle...

July 09, 2003   Traumatic Posterior Hip Subluxation in American Football - Journal of Bone and Joint Surgery Conclusion: The pathognomonic radiographic and magnetic resonance imaging triad of posterior acetabular lip fracture, iliofemoral ligament disruption, and hemarthrosis defines traumatic posterior hip subluxation. Patients in whom large hemarthroses are diagnosed on magnetic resonance images should undergo acute aspiration, and all players should be treated with a six-week regimen of toe-touch weight-bearing with use of crutches. Patients who have no sign of osteonecrosis on magnetic resonance imaging at six weeks can safely return to sports activity. Patients in whom osteonecrosis is diagnosed at six weeks are at risk for collapse and joint degeneration, and they should be advised against returning to sports...   Sequential Histomorphometric Analysis of the Growth Plate Following Irradiation with and without Radioprotection - Journal of Bone and Joint Surgery Conclusions: We found an initially profound but transient direct inhibitory effect of irradiation on growth plate chondrocytes. Recovery of growth plate function after irradiation corresponded temporally with the appearance of newly formed islands of proliferating chondrocytes. Accumulation of matrix led to a transient increase in overall growth plate height, which was most pronounced in the hypertrophic zone. This was due, in part, to the sensitivity of chondroclasts to irradiation. The radioprotectant amifostine reduced these effects on growth rate, growth plate height, matrix accumulation, and limb length. The transient effects of irradiation on the growth plate are reduced by a clinically utilized radioprotectant drug. Use of radioprotectants may have potential for reducing the damaging effects of irradiation on the growth plate while preserving the desirable effects of irradiation on tumors ...   Doppler sonographic findings in the long bicipital tendon sheath in patients with rheumatoid arthritis as compared with patients with degenerative diseases of the shoulder - Arthritis & Rheumatism PDS demonstrates vascularity in the long bicipital tendon sheath of patients with RA, but not in those with degenerative shoulder disorders...   Bone edema scored on magnetic resonance imaging scans of the dominant carpus at presentation predicts radiographic joint damage of the hands and feet six years later in patients with rheumatoid arthritis - Arthritis & Rheumatism MRI scans performed at the first presentation of RA can be used to help predict future radiographic damage, allowing disease-modifying therapy to be targeted to patients with aggressive disease... July 07, 2003     Reactivation in post-traumatic chronic osteomyelitis: ultrasonographic findings - Canadian Association of Radiologists Journal US is a reliable noninvasive imaging modality for the diagnosis of reactivation of post-traumatic chronic osteomyelitis in adults ...     Telangiectatic osteosarcoma of the clavicle: case report - Canadian Association of Radiologists Journal Telangiectatic osteosarcomas are rare aggressive variants of osteosar-coma, representing between 4.5% and 11% of osteosarcomas. 1 Most of these lesions have been described in the distal femur, proximal tibia and proximal humerus, with other sites being rare...

July 03, 2003   MRI of sports-related injuries of the foot and ankle: Part 1 - Current Problems in Diagnostic Radiology The ankle is one of the most frequently injured joints in the course of sports activities. MR imaging has become the modality of choice in the evaluation of most of these lesions, especially in competitive athletes...   Aneurysmal bone cyst of the temporal bone - Current Problems in Diagnostic Radiology Aneurysmal bone cysts are benign fibrosseous lesions of the bone that are rarely detected in the temporal bone. Seventeen cases of aneurysmal bone cysts with histological confirmation involving the temporal bone were reported in the literature. We report a case of left temporal aneurysmal bone cyst in a 52-year-old male with the clinical findings of periauricular painful swelling, decreased hearing, and facial paralysis. A magnetic resonance image of the patient showed a well-circumscribed multi-loculated expansile lesion of the left temporal bone during the first admission to the hospital. The lesion recurred 1 year after the subtotal resection with a more solid appearance. In addition, we review the literature for these rare lesions... July 02, 2003   Reliability of Computed Tomography Measurements of Paraspinal Muscle Cross-Sectional Area and Density in Patients With Chronic Low Back Pain - Spine Conclusions: The reliability of the CT scan for measuring the cross-sectional area and density of the back muscles is acceptable. The authors do not know definitely whether their results can be generalized because the interobserver and intermachine reliabilities were not investigated ...