March 03 News Headlines

These are radiology news updates from other sites

Date this page was last updated: 01/07/2007 03:02:38 PM

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March 28, 2003   High-resolution MRI vs multislice spiral CT: Which technique depicts the trabecular bone structure best? - European Radiology In conclusion, trabecular bone structure parameters assessed in distal radius HRMR and MSCT images are significantly correlated with those determined in corresponding specimen sections (p<0.01). High-resolution MR-derived structure parameters, however, performed better in the prediction of trabecular bone structure...   Bone densitometry in children: a critical appraisal - European Radiology In this article we give an overview of the available techniques and discuss the specific problems that can be expected when these techniques are used in children. In the discussion section general problems regarding bone densitometry in children are presented...   Selective water excitation for faster MR imaging of articular cartilage defects: initial clinical results - European Radiology ). The data were compared between the sequences using the paired Student's t-test. No statistically significant differences between the sequences were found for SNR, CNR, and cartilage defect grading (p=0.14-0.8). The WE 3D FLASH MR imaging seems to be promising for fast imaging of articular cartilage lesions of the knee...

March 27, 2003   Skeletal muscle metabolism in Duchenne muscular dystrophy (DMD): an in-vitro proton NMR spectroscopy study - Magnetic Resonance Imaging Kreb's cycle intermediate alpha-ketoglutarate was observed only in the diseased muscle, which is suggestive of predominant oxidative metabolism for energy generation...   March 26, 2003   The validity of sacral ratios to identify sacral abnormalities - BJU International Conclusion: The sacral ratio has good inter- and intra-observer repeatability. The mean value for a normal AP ratio concurred with that described previously by Pena but the variability of values among similar patients was large, suggesting this single value is of limited value in discriminating a normal from an abnormal sacrum...   March 24, 2003   Relaxation times of 31P-metabolites in human calf muscle at 3 T - Magnetic Resonance in Medicine everal methodological considerations are discussed which may help improve quantification of metabolite concentrations in the human (calf) muscle in vivo by using localized noninvasive 31P-MRS at 3 T, which is currently being tested for routine clinical applications...   18FDG PET scanning of benign and malignant musculoskeletal lesions - Skeletal Radiology Conclusion: 18FDG PET contributes unique information regarding metabolism of musculoskeletal lesions. By supplying a physiologic basis for more informed treatment and management, it influences prognosis and survival. Moreover, since residual, recurrent or metastatic tumors can be simultaneously documented on a single whole body scan, PET may theoretically prove to be cost-effective...   MR imaging of cartilage repair procedures - Skeletal Radiology It is becoming increasingly important for the radiologist to evaluate the appearance and outcome of cartilage repair procedures. MR imaging is currently the best method for such evaluation but it is necessary to use cartilage-specific sequences and to modify those sequences when necessary to minimize artifacts from retained metal within the joint...   Rosai-Dorfman disease manifesting as a solitary lesion of the radius in a 41-year-old woman - Skeletal Radiology Rosai-Dorfman disease is a rare entity predominantly affecting children and young adults, characterized in 83–95% of cases by painless bilateral cervical lymphadenopathy...   Metastatic breast carcinoma to bone disguised by osteopoikilosis - Skeletal Radiology No systemic symptoms were evident, blood parameters were normal and the lesions did not demonstrate any increased uptake of technetium on bone scan. An iliac crest bone biopsy, however, revealed metastatic disease in addition to osteopoikilosis. Conventional radiological investigations may not delineate metastasis on a background of bone dysplasia...   Routine Skeleton Radiography Using a Flat-Panel Detector: Image Quality and Clinical Acceptance at 50% Dose Reduction - Investigative Radiology Conclusion: Routine skeleton images with 50% dose reduction yield good image quality and good clinical acceptance. In cases with abundant soft tissue, less dose reduction or standard dose is required ...   Desmoid tumor of bone with enchondromatous nodules, mistaken for chondrosarcoma - Skeletal Radiology Desmoid tumor of bone, also termed desmoplastic fibroma or aggressive fibromatosis, is a rare, locally aggressive fibroblastic tumor. We present a 16-year-old male with a huge desmoid tumor involving the iliac wing. It was associated with enchondromatous nodules mimicking malignancy...   March 20, 2003   MR Imaging, MR Arthrography, and Specimen Correlation of the Posterolateral Corner of the Knee: An Anatomic Study - American Journal of Roentgenology Conclusion: The posterolateral corner of the knee comprises complex and variable anatomic structures. Recognition of these variations is important in the assessment of MR images of the knee...

March 19, 2003   Effects of Menopause on Bone Mineral Density in Women with Endemic Fluorosis - Clinical Nuclear Medicine Conclusions: Postmenopausal BMD values in both endemic fluorosis and controls were significantly less than premenopausal BMD values. Although the differences were less prominent in women with endemic fluorosis, menopause is still the major determinant of BMD in the spine and femur ...   Evaluation of calcaneus bone densitometry against hip and spine for diagnosis of osteoporosis - British Journal of Radiology This could be a major drawback in clinical practice if heel densitometry were used as the initial investigation and axial measurements were also available, since they would give conflicting results for a substantial proportion of these patients...   March 14, 2003   Osteochondritis Dissecans of the Hip - Acta Radiologica Conclusions: OD lesions are usually well seen with plain radiography. There is a great risk of developing early arthrosis and it seems that early surgery is connected with arthrosis development. Thus only symptomatic treatment is recommended...

March 12, 2003   Longitudinal stress fracture: patterns of edema and the importance of the nutrient foramen - Skeletal Radiology Conclusion: Primary diagnosis of longitudinal stress fracture is made by finding a vertical cleft on one or more axial images. Secondary signs of position of the nutrient foramen and patterns of edema may be useful...   Calcific myonecrosis: keys to early recognition - Skeletal Radiology Three cases of calcific myonecrosis are reported, unique in that two presented for care following infection and that one had extended to involve the muscle compartments of the foot, a previously unreported site...   Anaerobic osteomyelitis of femoral head with intraosseous, intra-articular, bursal and muscle pneumatosis - Skeletal Radiology The finding of intraosseous pneumatosis and its extension into the hip joint, iliopsoas bursa and subgluteus medius bursa is depicted. Intraosseous pneumatosis is a rare but concerning finding for osteomyelitis in the absence of a penetrating wound, recent surgery, biopsy or fracture...   Cat-scratch disease osteomyelitis - Skeletal Radiology We report on a patient who presented with osteomyelitis of a rib and adjacent abscess as a rare and atypical manifestation of cat-scratch disease. Radiographic findings showed an osteolytic lesion with adjacent mass. Biopsy, serology and polymerase chain reaction technique are essential for the final diagnosis. Prognosis is excellent with full recovery...   A 10-year minimum follow-up of hydroxyapatite-coated threaded cups Clinical, radiographic and survivorship analyses with comparison to the literature - Journal of Arthroplasty Based on the survivorship achieved with this implant, our results compare favorably with survivorship reported for the best cemented and cementless acetabular implant designs...

March 06, 2003   A More Efficient Magnetic Resonance Imaging-Based Strategy for Measuring Quadriceps Muscle Volume - Medicine and Science in Sports and Exercise Conclusion: Increasingly greater intervals between axial MRI sections result in substantially reduced agreement with a criterion measure of MV. The use of one axial section results in relatively higher error and thus should be used only when large effect sizes are expected ...   Computerized measurement of magnetic resonance imaging erosion volumes in patients with rheumatoid arthritis: A comparison with existing magnetic resonance imaging scoring systems and standard clinical outcome measures - Arthritis & Rheumatism Conclusion: This study is the first to demonstrate the feasibility, reliability, and validity of computerized MRI erosion volume measurements in the wrists of RA patients. The method will require further evaluation in terms of interobserver reliability, with examination of responsiveness in longitudinal studies, but the method demonstrates excellent interoccasion and intraobserver reliability and compares favorably with existing RA clinical outcome measures...   Asymptomatic avascular necrosis in patients with primary antiphospholipid syndrome in the absence of corticosteroid use: A prospective study by magnetic resonance imaging - Arthritis & Rheumatism Conclusion: AVN can be detected by MRI in 20% of patients with primary APS. Younger patients tend to develop AVN more frequently than do older patients, and the presence of livedo reticularis may identify individuals at risk for AVN. Clinicians should be aware of this possible clinical manifestation of primary APS, because early diagnosis can lead to early intervention ...   MR Imaging of the Menisci and Cruciate Ligaments: A Systematic Review - Radiology Conclusion: Diagnostic performance of MR imaging of the knee is different according to lesion type and is influenced by various study design characteristics. Higher magnetic field strength modestly improves diagnostic performance, but a significant effect was demonstrated only for anterior cruciate ligament tears...   Comparison of tibial cartilage volume and radiologic grade of the tibiofemoral joint - Arthritis & Rheumatism Conclusion: The results of this study demonstrate a strong negative, linear association between medial and lateral tibial cartilage volume and increasing grade of JSN. Using data from radiographically normal subjects, we have proposed a simple model for estimating normal cartilage volume. However, larger studies will be needed to confirm these findings and to determine whether they are valid in younger subjects ...   Morton Neuroma: MR Imaging in Prone, Supine, and Upright Weight-bearing Body Positions - Radiology Conclusion: Morton neuroma appears significantly different during MR imaging in prone, supine, or weight-bearing positions. The transverse diameter of Morton neuroma is significantly larger on images obtained in the prone position than it is on images obtained in the supine and upright weight-bearing positions. Visibility of Morton neuroma is best on MR images obtained in the prone position...   Predicting the Outcome of Distraction Osteogenesis by 3-Phase Bone Scintigraphy - The Journal of Nuclear Medicine Conclusion: Three-phase bone scintigraphy is a promising method for the assessment of distraction osteogenesis. The delayed image of 3-phase bone scintigraphy, especially, is an excellent modality for predicting the outcome of distraction osteogenesis...   Fractures of Proximal Portion of Fifth Metatarsal Bone: Anatomic and Imaging Evidence of a Pathogenesis of Avulsion of the Plantar Aponeurosis and the Short Peroneal Muscle Tendon - Radiology Conclusion: The pathogenesis of fractures of the proximal portion of the fifth metatarsal bone appears to be related to avulsion injury of PAL and SPM tendon fibers...