October 2005 News Headlines

These are radiology news updates from other sites

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

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October 31, 2005   A Case of Severe Calciphylaxis Seen on Three-Phase Bone Scan - Clinical Nuclear Medicine A 60-year-old woman with end-stage renal disease on hemodialysis presented with cellulitis of both pretibial areas, which did not respond to antibiotics. She then underwent a bone scan showing evidence of calciphylaxis. She was subsequently diagnosed with hyperparathyroidism secondary to renal failure with parathyroid hormone levels as high as 2500...   MR Imaging Appearance of Rheumatoid Arthritis in the Foot - Seminars in Musculoskeletal Radiology Although conventional radiographs remain the initial mainstay for imaging of the foot in patients with rheumatoid arthritis (RA), magnetic resonance (MR) imaging has afforded the ability to detect early signs of the disease (i.e., synovitis, tenosynovitis, bone lesions, and bursitis), especially at the forefoot...   Pseudo-aneurysm of the anterior tibial artery, a rare cause of ankle swelling following a sports injury - BMC Emergency Medicine Conclusion: Vascular injuries remain a rare cause of ankle pain and swelling following sports injuries, however it is important to consider these injuries when no definite musculo-skeletal cause is found. Ultrasound duplex and Transfemoral arteriogram are appropriate, sensitive modalities for investigation, and may allow novel treatment to be directed percutaneously...     October 28, 2005   MR Imaging of Tendons and Ligaments of the Midfoot - Seminars in Musculoskeletal Radiology Disorders of ligaments and tendons at the midfoot are less common than those around the ankle and at the hindfoot. Nevertheless, disorders of the distal portions of the anterior and posterior tibialis tendons (ATT and PTT) and the spring ligament complex have an important clinical impact and can be treated with surgery... October 27, 2005   Musculoskeletal Infection Imaging: Past, Present, and Future - Current Infectious Disease Reports Imaging plays a key role in the evaluation of patients with known or suspected musculoskeletal infection. Although conventional radiograph still remains as the initial imaging approach, it has low sensitivity and specificity in the setting of acute infection. Magnetic resonance is highly sensitive for the detection of acute osteomyelitis and septic arthritis...   Coracoid tip position on frontal radiographs of the shoulder: a predictor of common shoulder pathologies? - British Journal of Radiology We conclude that coracoid tip position is highly variable. Since type I coracoids are predominant in shoulders with supraspinatus tears and type II coracoids in shoulders with subscapularis tears, coracoid tip position may thus provide a simple diagnostic complement for a probable site of rotator cuff tears... October 26, 2005   Application of 3D-MR image registration to monitor diseases around the knee joint - Journal of Magnetic Resonance Imaging (Wiley) To estimate the accuracy and consistency of a method using a voxel-based MR image registration algorithm for precise monitoring of knee joint diseases...Conclusion: The present method based on an NCC algorithm can be used to register serial MR images of the knee joint with error on the order of a subvoxel. This method would be useful for precisely assessing therapeutic response and monitoring knee joint diseases...   MR Imaging of the Forefoot: Morton Neuroma and Differential Diagnoses - Seminars in Musculoskeletal Radiology Magnetic resonance (MR) imaging of Morton neuromas is highly accurate. Morton neuromas are more conspicuous when the patient is prone positioned and the foot is plantar flexed than in the supine position with the toes pointing upward. MR imaging of Morton neuromas has a large influence on the diagnostic thinking and treatment plan of orthopedic foot surgeons...     October 25, 2005   Parathyroid and Bone Scintigraphy in Hyperparathyroidism - Clinical Nuclear Medicine Hyperparathyroidism involves functional and morphologic parathyroid abnormalities and leads to skeletal changes in many cases. Parathyroid scintigraphy and whole-body bone scans can demonstrate abnormal parathyroid uptake and skeletal changes caused by hyperparathyroidism. We illustrate a case of a typical parathyroid adenoma and its bone changes on whole-body bone scans and Tc-99m sestamibi parathyroid imaging...   Accumulation of Tc-99m DTPA in Ewing Sarcoma - Clinical Nuclear Medicine Ewing sarcoma is the second most frequent primary bone tumor in children. The authors present the case of a 15-year-old girl with Ewing sarcoma situated in the right iliac ala. During chemotherapy, dynamic scintigraphy was performed with the use of Tc-99m DTPA to evaluate kidney function. Intensive, unusual accumulation of the radiotracer outside the urinary system around the tumor was seen during examination...   Orthopedic Hardware Complications Diagnosed with Multi-Detector Row CT - Radiology To retrospectively evaluate multi-detector row computed tomography (CT) for the depiction of orthopedic hardware complications in the spine and appendicular skeleton...Conclusion: Multi-detector row CT is an effective tool for depicting orthopedic hardware complications...   CT Appearance of Bone Metastases Detected with FDG PET as Part of the Same PET/CT Examination - Radiology Conclusion: CT images obtained as part of PET/CT scanning were useful in yielding the precise location of bone lesions and thus helping avoid misdiagnosis of bone metastasis; however, CT revealed morphologic changes in only half of the lesions assigned a grade of 3 or 4 at PET... October 24, 2005   Plasmacytoma of the proximal humerus - Clinical Imaging This is the case report of a 67-year-old man who developed a solitary lytic lesion of the proximal humerus. Through further studies that included MR imaging of the affected upper extremity and biopsy, a final diagnosis of plasmacytoma was given. We present the clinical, imaging, and histologic findings and review the general characteristics of this neoplastic condition...   Anterior Shoulder Instability: Accuracy of MR Arthrography in the Classification of Anteroinferior Labroligamentous Injuries - Radiology To retrospectively evaluate the accuracy of magnetic resonance (MR) arthrography in the classification of anteroinferior labroligamentous injuries by using arthroscopy as the reference standard...Conclusion: MR arthrography is accurate in enabling classification of acute and chronic anteroinferior labroligamentous injuries, although correct interpretation of Perthes lesions remains difficult... October 21, 2005   Bone Scintigraphy of Calciphylaxis: A Syndrome of Vascular Calcification and Skin Necrosis - Clinical Nuclear Medicine Calciphylaxis is a highly morbid syndrome of vascular calcification and skin necrosis, the pathophysiology of which remains largely elusive. We report a patient with end-stage renal disease and multiple painful skin lesions who underwent a bone scan for extremity pain... October 20, 2005   Iliac hyperdense line: a new radiographic sign of gluteal muscle contracture - Pediatric Radiology Conclusion: The iliac hyperdense line on pelvic plain film can be used as a radiographic sign to suggest a diagnosis of GMC. This sign might be a result of the long and persistent pulling effect of the contracted gluteus maximus muscle, which deforms the lateral cortex of the posterior ilium from an oblique course to an anteroposterior course tangential to the X-ray beam... October 19, 2005   16-Detector multislice CT in the detection of stress fractures: a comparison with skeletal scintigraphy - Clinical Radiology Conclusion: Despite technological advances in CT, scintigraphy appeared to detect more stress fractures. As such, multidetector CT should not be used as a routine initial investigation in stress fracture detection. The potential use of 99mTc-MDP quantification at fracture sites is of interest and may be worth further investigation...   Can follow-up radiography for acute scaphoid fracture still be considered a valid investigation? - Clinical Radiology To determine whether follow-up radiography is a valid diagnostic investigation in patients with suspected acute scaphoid fractures and normal initial radiographs...Conclusion: With poor sensitivity, poor negative predictive value and poor reliability, follow-up radiography cannot be considered a valid diagnostic examination for the detection of scaphoid fracture in patients with normal initial radiographs...     October 18, 2005   Localized COSY and DQF-COSY 1H-MRS sequences for investigating human tibial bone marrow in vivo and initial application to patients with acute leukemia - Journal of Magnetic Resonance Imaging (Wiley) To develop 2D H-MRS measurement sequences for the evaluation of bone marrow lipids, and to assess these measurement sequences in healthy and diseased bone marrow...Conclusions: No significant differences were observed in the spectra obtained from bone marrow using the 2D H-MRS sequences. A novel unsaturated lipid proton index was developed... October 17, 2005   Comparison of vertebral morphometry in the lumbar vertebrae by T1-weighted sagittal MRI and radiograph - European Journal of Radiology In this study, we investigated the usefulness of T1-weighted sagittal MR images at the lumbar vertebrae in the vertebral morphometry, in comparison with lateral radiographs...Conclusion: Severe biconcave deformity of vertebra can be detected by both MRI and X-ray morphometry, although mild biconcave deformity can be detected only by MRI morphometry...     October 13, 2005   MRI findings in Dyggve-Melchior-Clausen syndrome, a rare spondyloepiphyseal dysplasia - Journal of Magnetic Resonance Imaging (Wiley) We present the case of an 8-year-old female patient with bone dysplasia as part of Dyggve-Melchior-Clausen syndrome (DMCS). MRI was used to evaluate the case. In the spine, odontoid apophysis aplasia was found with no ossification nucleus, vertebrae with central hump, disk protrusions, hypertrophy of the posterior common vertebral ligament, and hidden spina bifida at the S4 level...   Sonographic measurements of the ulnar nerve and the cubital tunnel at the elbow: Interobserver reproducibility - Radiography Conclusion: Measures that reflected both cubital tunnel and ulnar nerve size were found to have a high degree of reproducibility between sonographers. Some measures which may have been influenced by anatomical irregularities, scanning planes and indistinct tissue boundaries were found to exhibit a greater degree of variance between sonographers... October 12, 2005   Left ventricular synchronization by biventricular pacing in Becker muscular dystrophy as assessed by tissue Doppler imaging - Heart & Lung; The Journal of Acute and Critical Care Biventricular (BiV) pacing is a promising therapy for severe heart failure. The effect of BiV pacing is cardiac resynchronization of both ventricles. Asynchrony of the ventricular contraction and restoration of cardiac synchronization can be assessed by tissue Doppler imaging. Here we describe a patient with Becker muscular dystrophy with heart failure caused by dilated cardiomyopathy in whom a BiV pacemaker was implanted...   Contrast-enhanced high-resolution magnetic resonance imaging of autologous cartilage implants of the knee joint - Magnetic Resonance Imaging In this study, we combined a high-resolution cartilage-sensitive fast-spin echo (FSE) sequence with intravenous application of a contrast agent for enhancing synovial fluid. Two independent musculoskeletal radiologists interpreted the pictures for the thickness, length and surface of the cartilage implants. A multivariate two-way analysis of variance with two repeated measures was performed and showed that evaluation of cartilage implant morphology was significantly improved after the application of gadodiamide on proton density FSE images... October 11, 2005   In vivo 3T spiral imaging based multi-slice T1 mapping of knee cartilage in osteoarthritis - Magnetic Resonance in Medicine Tp1 describes the spin-lattice relaxation in the rotating frame and has been proposed for detecting damage to the cartilage collagen-proteoglycan matrix in osteoarthritis. In this study, a multi-slice Tp1 imaging method for knee cartilage was developed using spin-lock techniques and a spiral imaging sequence...   Accuracy and precision of quantitative assessment of cartilage morphology by magnetic resonance imaging at 3.0T - Arthritis & Rheumatism Conclusion: Quantitative MRI measurement of cartilage morphology at 3.0T (partition thickness 1 mm) was found to be accurate and tended to be more reproducible than at 1.5T (partition thickness 1.5 mm). Imaging at 3.0T may therefore provide superior ability to detect changes in cartilage status over time and to determine responses to treatment with structure-modifying drugs ...     October 10, 2005   Bone Motion Analysis From Dynamic MRI: Acquisition and Tracking - Academic Radiology Conclusion: The final protocol (bFFE, TR/TE 3.5/1.1 ms, Flip angle 80°, pixel size 4.7 X 2.6 mm, partial Fourier reduction factor of 0.65 in read direction, SENSE acceleration factor of 2, frame rate = 6.7 frames/s) provides sufficient morphological data for bone tracking to be carried out with an accuracy of 3° in terms of joint angle...   Food signs in musculoskeletal radiology - Applied Radiology This article describes a variety of food signs in musculoskeletal radiology. The review includes discussions of the underlying pathology responsible for these specific radiographic signs and relevant differential diagnoses... October 07, 2005   Evaluation of Rotator Cuff Tears with Magnetic Resonance Arthrography - Clinical Orthopedics and Related Research Magnetic resonance arthrography also allowed morphologic classification of the torn tendon as blunt end, tapering end, indistinct end, horizontal tear, and global tear. There was good agreement in classifying torn edges; the imaging findings agreed with findings at surgery. Magnetic resonance arthrography was more accurate in evaluating rotator cuff tear size and morphologic features than conventional magnetic resonance imaging...   Radiographic Assessment of Pediatric Proximal Radius Fractures: Interrater and Intrarater Reliability - Journal of Pediatric Orthopaedics Three methods of measuring pediatric proximal radius fracture radiographs were compared using injury films of 32 patients. Angulation and displacement were independently measured by four physicians. One physician measured the films by each method a second time 2 months later. Values for interrater and intrarater reliability were determined using inter- and intra-class coefficients (ICC)...     October 06, 2005   Achilles tendinopathy after treatment with fluoroquinolone - Australasian Radiology Fluoroquinolone antibiotic therapy is a recognized but poorly understood cause for Achilles tendinopathy. We report here a patient who developed bilateral partial Achilles tendon tears as a result of fluoroquinolone therapy. Ultrasound and MRI were both useful in identifying and distinguishing between Achilles tendinosis and tendon rupture. The current published literature on this problem was also reviewed...   How to investigate oxygen supply, uptake, and utilization simultaneously by interleaved NMR imaging and spectroscopy of the skeletal muscle - Magnetic Resonance in Medicine Human skeletal muscle perfusion, oxygenation, and high-energy phosphate distribution were measured simultaneously by interleaved 1H and 31P NMR spectroscopy and 1H NMR imaging in vivo. From these parameters, arterial oxygen supply (DO2), muscle reoxygenation rate, mitochondrial ATP production, and O2 consumption (VO2) were deduced at the recovery phase of a short ischemic exercise bout... October 05, 2005   18F-Fluoride PET for Monitoring Therapeutic Response in Paget's Disease of Bone - The Journal of Nuclear Medicine Conclusion: Our results show that 18F-fluoride PET can be used to noninvasively and accurately monitor the efficacy of treatment with bisphosphonates in Paget's disease of bones. SUVmax correlates with Ki-PAT and Ki-NLR and, interestingly, varies in the same manner as kinetic indices. Therefore, the use of SUVmax could avoid the need for dynamic acquisition and arterial blood sampling and would facilitate the use of whole-body PET in a clinical setting...     October 04, 2005   MRI of the Intrinsic Muscles of the Hand: Spectrum of Imaging Findings and Clinical Correlation - American Journal of Roentgenology The purpose of our study was to describe the spectrum of intrinsic hand muscle abnormalities on MRI in patients with clinically evident abnormalities of the intrinsic hand muscles and to correlate clinical and radiologic findings...Conclusion: MRI of the hands is useful and correlates well with clinical findings in patients with intrinsic hand muscle abnormalities...   Diagnostic and Therapeutic Use of Sonography-Guided Iliopsoas Peritendinous Injections - American Journal of Roentgenology Conclusion: Sonography-guided iliopsoas bursal/peritendinous injections are useful in determining the cause of hip pain. They can provide relief to most patients with iliopsoas tendinosis/bursitis after hip replacement. The results of injection alone are not as successful in cases of idiopathic iliopsoas tendinosis/bursitis, but the technique can help determine which patients may benefit from a surgical tendon release...   Recent Developments in Nuclear Medicine in the Management of Bone Metastases: A Review and Perspective - American Journal of Clinical Oncology Conclusion: Bone pain palliation is critical for cancer patients afflicted with bone metastases, but radionuclides remain underutilized in such treatments. A comprehensive and an interdisciplinary clinical approach toward increasing the use of radionuclides in alleviating metastatic bone pain is proposed. Data from clinical collaborations will help optimize radiopharmaceutical therapy for pain palliation, increase its awareness among oncologists, and contribute effectively to patient palliation and quality-of-life improvements... October 03, 2005   SAPHO syndrome masquerading as metastatic bone disease - Australasian Radiology A 46-year-old woman who had had a right mastectomy for breast carcinoma a month before underwent bone scintigraphy. The examination revealed multiple pelvic, vertebral and sternal hot spots suggestive of bone metastases. Standard X-rays and CT confirmed the presence of bony lesions but they were not typical of bone metastases...   Magnetic Resonance Imaging of Inflammatory Lesions in the Spine in Ankylosing Spondylitis Clinical Trials: Is Paramagnetic Contrast Medium Necessary - Journal of Rheumatology The aim of this prospective study was to investigate whether Gd-enhanced sequences add relevant information compared to STIR imaging alone in the detection of active spinal lesions...Conclusion, both STIR and T1/Gd sequences measure inflammation of the spine, as well as change of inflammation, with a high level of agreement between the 2 sequences. For future clinical randomized trials with MRI of the spine as outcome measure, STIR could be considered for use as the sole imaging technique...   Spring Ligament Complex: MR Imaging-Anatomic Correlation and Findings in Asymptomatic Subjects - Radiology Conclusion: The superomedial and inferoplantar longitudinal CNLs are consistently visible portions of the SLC. The medioplantar oblique ligament is thinner, is seen less consistently, and has mainly a characteristic striated MR imaging appearance...   Computed tomography of intrathoracic extramedullary haematopoiesis occurring as a complication of osteopetrosis - Australasian Radiology Intrathoracic extramedullary haematopoiesis occurring as a complication of osteopetrosis is uncommon. The combination of classic plain film and CT findings should suggest the diagnosis, which can be non-invasively confirmed with bone marrow scintigraphy...