July 2006 News Headlines

These are radiology news updates from other sites

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Date this page was last updated: 01/07/2007 03:02:52 PM

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July 28, 2006

Prognostic Value of Magnetic Resonance Arthrography for Czerny Stage II and III Acetabular Labral Tears
Conclusions: MRA is sensitive and accurate for the detection of acetabular labral tears, with excellent intraobserver reliability. Arthroscopic partial limbectomy is successful in two thirds of patients. Patients with Czerny stage II and III tears do not appear to have significantly different outcomes following arthroscopic labral debridement...



July 26, 2006

Intraosseous haemangioma of the proximal femur: imaging findings
British Journal of Radiology
Haemangiomas of bone are uncommon lesions, accounting for approximately 1% of all primary bone tumours. The most frequent sites of involvement are the calvaria and the vertebral column...


Magnetic resonance?based serial pelvimetry: Do maternal pelvic dimensions change during pregnancy?
American Journal of Obstetrics and Gynecology
Conclusion: Serial magnetic resonance?based pelvimetry showed relative stability of pelvic measurements through the course of pregnancy and delivery. If comparative pelvimetry is to be useful as an antepartum predictor of labor success, then it may be possible to obtain reliable pelvimetry in those patients anytime after delivery...


July 25, 2006

Psoriatic Arthritis and Rheumatoid Arthritis: Findings in Contrast-Enhanced MRI
American Journal of Roentgenology
Periostitis and synovitis of the proximal interphalangeal joints are typical MRI findings in patients with PsA, whereas synovitis with erosions of the wrist, the midcarpal joints, the carpometacarpal joints, and the metacarpophalangeal joints are typical findings in patients with RA...

Periarticular Bone Findings in Rheumatoid Arthritis: T2-Weighted Versus Contrast-Enhanced T1-Weighted MRI
American Journal of Roentgenology
In rheumatoid arthritis, contrast-enhanced T1-weighted MRI depicts more periarticular bone abnormalities than fat-suppressed T2-weighted MRI. These MR techniques are equally predictive of frank, erosive disease that is evident on CT...

Association Between Rotator Cuff Abnormalities and Reduced Acromiohumeral Distance
American Journal of Roentgenology
The Wrisberg variant of the discoid lateral meniscus is a rare condition with a highly suggestive clinical history. The musculoskeletal radiologist should consider this diagnosis whenever a discoid lateral meniscus is identified because making this elusive diagnosis may prove immensely useful for the orthopedic surgeon...



July 24, 2006

Comparison of Radiologic Signs and Clinical Symptoms of Spinal Stenosis
Clinical findings of spinal stenosis were compared to graded radiologic findings of dural sac narrowing...Conclusion: Although an external compression simulates the dynamic condition in the back during standing position, it does not eliminate the need to compare the radiologic findings with the clinical symptoms of patients examined because of a suspected narrowing of the spinal canal...


A Case of Hamate Fracture with Dislocation of the Ring and Little Finger Metacarpals - Imaged with Three-dimensional Computed Tomography
European Journal of Trauma
A case of fracture of the hamate combined with dislocation of the fourth and fifth metacarpals is presented. This is a rare injury. Diagnosis and treatment were delayed because the fracture dislocation was initially missed due to lack of familiarity with the injury and inadequate conventional radiographs. Three-dimensional computed tomography scanning (3D-CT) provided definite diagnosis and adequate insight in the relation of fracture parts. Open reduction and fixation with k-wires gave good outcome...


July 20, 2006

Multifocal Melorheostosis
Clinical Nuclear Medicine
Sclerosing lesions of bone such as melorheostosis, osteopathia striata, and osteopoikilosis have rather characteristic but overlapping radiographic features with differential bone scan findings. These lesions usually involve a single bone. We present a patient who had radiographic evidence of involvement in at least 2 sites who was shown by bone scintigraphy to have diffuse symmetric involvement of the appendicular skeleton



July 19, 2006

Articular cartilage MR imaging and thickness mapping of a loaded knee joint before and after meniscectomy
Osteoarthritis and Cartilage
Conclusions: Medial meniscectomy resulted in increased medial tibial cartilage nominal strains centrally and decreased strains peripherally. Areas of abnormally high nominal strain following meniscectomy correlated with areas that are known to develop fibrillation and softening 16 weeks after medial meniscectomy. Areas of abnormally low nominal strain correlated with areas of osteophyte formation. Studies of articular cartilage deformation may prove useful in elucidating the mechanical etiology of osteoarthritis...

Coexistence of intravertebral vacuum and intradiscal vacuum
Joint, Bone, Spine
Conclusion: Our findings support migration of gas from the disk to a fracture in the adjacent vertebral body. The term "vertebral osteonecrosis" used to designate IVV may be inappropriate. IVV is rarely shown by plain radiographs, indicating a need for other morphological criteria...
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Are bone erosions detected by magnetic resonance imaging and ultrasonography true erosions? A comparison with computed tomography in rheumatoid arthritis metacarpophalangeal joints
Arthritis Research & Therapy
The objective of the study was, with multidetector computed tomography (CT) as the reference method, to determine whether bone erosions in rheumatoid arthritis (RA) metacarpophalangeal (MCP) joints detected with magnetic resonance imaging (MRI) and ultrasonography (US), but not with radiography, represent true erosive changes...The present study strongly indicates that bone erosions, detected with MRI and US in RA patients, represent a loss of calcified tissue with cortical destruction, and therefore can be considered true bone erosions...


July 18, 2006

Magnetic Resonance Imaging of the Elbow: Update on Current Techniques and Indications
Journal of Hand Surgery
The utility of magnetic resonance imaging of the elbow has noticeably improved over the past decade...This article serves as an educational update for hand surgeons and illustrates the features of normal anatomy and specific disorders of the elbow...

Osteosarcoma: Preliminary Results of In Vivo Assessment of Tumor Necrosis After Chemotherapy With Diffusion- and Perfusion-Weighted Magnetic Resonance Imaging
Investigative Radiology
Conclusion: Both dynamic contrast-enhanced MRI and diffusion-weighted MRI permit recognition of tumor necrosis induced by chemotherapy in osteosarcomas. We hypothesized that diffusion-weighted imaging is correlated directly with tumor necrosis. Perfusion-weighted imaging is correlated with microvessel density, vascular permeability, local blood volume, and flow. Therefore, perfusion weighed MRI depicts areas of tumor cell necrosis indirectly...

Osteosclerotic Myeloma With Spinal Leptomeningitis and Severe Polyneuropathy: A Case Report
Journal of Computer Assisted Tomography
The diagnosis of osteosclerotic myeloma was confirmed by bone marrow biopsy findings including the chromosome 13q14 deletion in 37% of the cells. Leptomeningeal involvement was demonstrated by spine magnetic resonance imaging with gadolinium administration and fat-suppression technique...



July 17, 2006

US Diagnosis of UCL Tears of the Thumb and Stener Lesions: Technique, Pattern-based Approach, and Differential Diagnosis
The thumb is a central component supporting the intricate movements of the hand. Patients with acute thumb pain, particularly after trauma, require prompt evaluation of structural integrity, thus avoiding long-term morbidity such as instability, chronic pain, and osteoarthritis...


MR Imaging of Rotator Cuff Injury: What the Clinician Needs to Know
The rotator cuff muscles generate torque forces to move the humerus while acting in concord to produce balanced compressive forces to stabilize the glenohumeral joint. Thus, rotator cuff tears are often associated with loss of shoulder strength and stability, which are crucial for optimal shoulder function...


July 14, 2006

External anal sphincter volume measurements using 3-dimensional endoanal ultrasound
American Journal of Obstetrics and Gynecology
Significant nerve injury to a muscle can be associated with muscle atrophy and volume loss...Conclusion: Quantitative 3D ultrasound of the anal sphincter is moderately reproducible...

Prediction of TMJ Arthralgia According to Clinical Diagnosis and MRI Findings
The International Journal of Prosthodontics
Conclusions: Pain in the TMJ caused by the anatomic proximity of the muscle masseter origin and the lateral TMJ pole and the possible existence of trigger points in the musculature may lead to a false-positive or a false-negative diagnosis of arthralgia. Additionally, clinicians must consider the psychosocial aspects of pain in ideal treatment planning...

Monitoring Buried Free Flaps: Limitations of the Implantable Doppler and Use of Color Duplex Sonography as a Confirmatory Test
Plastic and Reconstructive Surgery
Conclusions: The implantable Doppler probe is a sensitive method for postoperative monitoring of free flaps but is prone to false-positive signals.The use of color duplex sonography to confirm implantable Doppler probe findings may avert unnecessary surgical exploration, thereby improving postoperative monitoring of free flaps...


July 12, 2006

Chronic disease and independence in old age: A case study
This report uses case study methodology to examine the issue of long-term care of the elderly in the United Kingdom, including where that care should take place. The report will examine the difficulties inherent in maintaining independent living for the elderly (in particular the danger and cost of falls) ...


July 11, 2006

Nail and Distal Interphalangeal Joint in Psoriatic Arthritis
Journal of Rheumatology
Conclusion: MRI nail involvement was present in almost all patients with PsA studied, even in those without clinically evident onychopathy. MRI involvement of DP always overlapped with nail involvement, since it was present in all psoriatic cases showing MRI nail involvement. In contrast, MRI DIP joint involvement was almost exclusively in a lower percentage of the patients with clinical nail involvement and was always associated with MRI DP changes. Our results suggest that DIP joint involvement is always secondary to nail and DP involvement...



July 10, 2006

A Three-Year Follow-up of Lumbar Spine Endplate (Modic) Changes
Conclusions: Modic changes are common MRI findings in patients with degenerative lumbar disc disease. We found evidence that Modic Type II changes may be less stable than previously assumed...

Interobserver and Intraobserver Reliability of Maximum Canal Compromise and Spinal Cord Compression for Evaluation of Acute Traumatic Cervical Spinal Cord Injury
Conclusion: Our results indicate that the intraobserver reliability for the MCC and MSCC was high. Although the interobserver reliability for all three radiologic parameters in the present study was below 0.75, the observed differences were small and largely accounted for by the limitations in the precision of the calibrated ruler. For cases with minimal cord compression, the measurement of canal stenosis (MCC) proved more accurate...

Proposed Protocol for Reading Images of Humeral Head Fractures
Clinical Orthopedics and Related Research
The best interobserver reliabilities with radiographs plus computed tomography scans were with the number of fragments, displacement of the lesser tuberosity, and extraarticular or articular fractures. Computed tomography allows better assessment of some parameters in characterizing proximal humeral fractures. The use of a structured protocol in reading images seems useful and allows better reliability than reported for other approaches...

Case Reports: An Unusual Complication of Radiofrequency Ablation Treatment of Osteoid Osteoma
Clinical Orthopedics and Related Research
Radio-frequency ablation is precise, minimally invasive, safe, effective, and associated with minimal complications and reduced use of healthcare resources. We report a patient treated with radiofrequency ablation for tibial osteoid osteoma and thermal necrosis of the skin...



July 7, 2006

The Position of the Aorta Relative to the Spine Before and After Anterior Instrumentation in Right Thoracic Scoliosis
Conclusions: This MRI and CT based study of 25 patients with thoracic AIS treated by standard open dual rod and dual screw instrumentation demonstrates a migration of the aorta by 31[degrees] from a more posterolateral position before surgery to a more anteromedial position after surgery at the curve apex. Scoliosis surgeons should be aware of these changes; any excessive contralateral screw penetration must be avoided at any level...


Standing versus Supine Radiographs in RSA Evaluation of Femoral Head Penetration
Clinical Orthopedics and Related Research
Evaluation of polyethylene acetabular component wear in total hip arthroplasties commonly is performed using serial radiographs of the hip by measuring the change in the location of the center of the femoral head in relation to the acetabular component...We found no difference between the average total femoral head penetration when using supine or standing radiographs...


July 5, 2006

F-18 FDG Whole-Body PET for the Assessment of Disease Activity in Patients With Rheumatoid Arthritis
Clinical Nuclear Medicine
F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) can be used to image synovitis in patients with rheumatoid arthritis (RA)...Conclusions: Visual assessment of FDG uptake shows a significant correlation with clinical evaluation of disease activity in patients with RA undergoing antiinflammatory treatment...

Delayed Gadolinium-Enhanced Magnetic Resonance Imaging of Cartilage to Predict Early Failure of Bernese Periacetabular Osteotomy for Hip Dysplasia
Journal of Bone and Joint Surgery
Conclusions: Bernese periacetabular osteotomy for the treatment of hip dysplasia can decrease pain and improve function in symptomatic dysplastic hips. The dGEMRIC index, as an early measure of osteoarthritis, appears to be useful for identifying poor candidates for a pelvic osteotomy...

Facet Joint Arthropathy Demonstrated on FDG-PET
Clinical Nuclear Medicine
Lower back pain is a common medical problem. Facet joint arthropathy is one of the many causes of lower back pain and diagnosing it as the source of pain is a medical challenge. In this report, the potential of fluorodeoxyglucose (FDG) positron emission tomography (PET) in the diagnosis of facet joint arthropathy was demonstrated...


July 3, 2006

Intense Uptake of Tc-99m HMDP in Pleural Metastasis From Osteosarcoma
Clinical Nuclear Medicine
Osteosarcoma is a tumor that occurs principally in children and young adults. Moreover, it very rarely arises from a rib. The authors report a case of a costal osteosarcoma revealed by a hemorrhagic pleural effusion in a 46-year-old man...