July 2005 News Headlines

These are radiology news updates from other sites

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

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July 29, 2005   Acetabular Fractures Revisited: A New CT-Based Classification - Seminars in Musculoskeletal Radiology The axial CT display of acetabular fracture patterns provides a basis for a classification of acetabular fractures that is simple, unambiguous, readily understood by both radiologists and orthopedic surgeons, and provides clear direction for both diagnosis and surgical treatment planning. Category and subcategory fracture specificity creates a mechanism for intra- and interdepartmental postoperative assessment of any of the individual acetabular fracture types...   Accuracy of quantitative magnetic resonance imaging in the detection of ex vivo focal cartilage defects - Annals of Rheumatic Diseases Conclusions: These findings show that qMRI allows accurate quantification of focal cartilage defects. It may therefore represent a valuable tool in the diagnosis of traumatic cartilage lesions, osteochondrosis dissecans, and osteochondral fractures, and in monitoring their responsiveness to surgical or other treatments... July 28, 2005   Characteristic Appearance on Bone Scintigraphy of a 'Stone Man' - Clinical Nuclear Medicine Fibrodysplasia ossificans progressiva (FOP), also known as "stone man disease," is an extremely rare autosomal dominant disorder. Its incidence is reported to be approximately 1 in 2 million people. The disease is characterized by progressive replacement of fascia, tendons, muscles, and ligaments by bone, leading to encasement of the skeleton within a "new extra skeleton." It usually appears in the first decade of life, more commonly in males...   Musculoskeletal Ultrasound and MRI: Which Do I Choose? - Seminars in Musculoskeletal Radiology In the diagnosis of musculoskeletal disorders, there are several applications where both ultrasound and magnetic resonance imaging (MRI) may be considered viable alternatives. Because there are advantages and disadvantages to each imaging method, often it is unclear which should be considered for a specific indication. This article reviews this topic in the following manner...     July 27, 2005   High-Resolution Computed Tomography of Temporal Bone: Part II: Coronal Preoperative Anatomy - Journal of Computer Assisted Tomography Summary: The purpose of this 4-part series is to demonstrate the high-resolution axial and coronal anatomy of temporal bone from a flat-panel detector-based volume computed tomography (CT) scanner (parts I and II); these imaging planes are then used to outline the effect of different surgical procedures commonly applied to the temporal bone (parts III and IV)...   16-MDCT of the Posttraumatic Pediatric Elbow: Optimum Parameters and Associated Radiation Dose - American Journal of Roentgenology Our objective was to investigate a low-radiation-dose protocol for 16-MDCT of the posttraumatic pediatric elbow using z-axis automatic tube-current modulation, based on optimum scanning parameters determined in a porcine fracture model, and to report the radiation dose from this technique in nine children with acute elbow trauma...   Controversies in Protocol Selection in the Imaging of Articular Cartilage - Seminars in Musculoskeletal Radiology Magnetic resonance (MR) imaging, with its unique ability to noninvasively image and characterize soft tissue, has shown promise in assessment of cartilage. The development of new, fast imaging methods with high contrast will improve the MR evaluation of cartilage morphology. In addition to morphological MR imaging methods, MR imaging contrast mechanisms under development may reveal detailed information regarding the physiology of cartilage...   Metallic Prosthesis: Technique to Avoid Increase in CT Radiation Dose with Automatic Tube Current Modulation in a Phantom and Patients - Radiology The institutional review board approved this Health Insurance Portability and Accountability Act-compliant study protocol, with waiver of informed consent. The purpose of the study was to retrospectively evaluate the combined automatic tube current modulation technique in patients with orthopedic metallic prostheses... July 26, 2005   Radiographic validation of the Manchester scale for the classification of hallux valgus deformity - Rheumatology Conclusions. These findings indicate that the Manchester scale provides a valid representation of the degree of hallux valgus deformity determined from radiographic measurement of hallux abductus angle and intermetatarsal angle. We therefore recommend the use of this instrument as a simple, non-invasive screening tool for clinical and research purposes...   MR Imaging Findings in Hands in Early Rheumatoid Arthritis: Comparison with Those in Systemic Lupus Erythematosus and Primary Sjögren Syndrome - Radiology To evaluate prospectively the use of magnetic resonance (MR) imaging for differentiating true rheumatoid arthritis (RA) from systemic lupus erythematosus (SLE) or primary Sjögren syndrome in patients who have inflammatory polyarthralgia of the hands but no radiographic evidence of RA...Conclusion: It may be impossible to distinguish between patients with early RA and those without RA (ie, those with SLE or primary Sjögren syndrome) by means of MR imaging...     July 25, 2005   Triad of MR Arthrographic Findings in Patients with Cam-Type Femoroacetabular Impingement - Radiology To retrospectively analyze magnetic resonance (MR) arthrographic findings in patients with clinical cam-type femoroacetabular impingemen...Conclusion: MR arthrography demonstrated a triad of abnormal head-neck morphology, anterosuperior cartilage abnormality, and anterosuperior labral abnormality in 37 of 42 patients with cam-type femoroacetabular impingement... July 22, 2005   Depth-dependent proton magnetization transfer in articular cartilage - Journal of Magnetic Resonance Imaging (Wiley) Conclusion: We demonstrated that the MTR in bovine patellar cartilage is depth-dependent and is relatively higher in the radial zone compared to the superficial zone. The high MTR in the radial zone not only depends on collagen content, it may also reflect a number of other parameters, such as the arrangement of macromolecules, high solid content, bound water fraction attached to macromolecules, radial orientation...   Contracture of the Deltoid Muscle: Sonographic Evaluation with MRI Correlation - American Journal of Roentgenology This article evaluates the sonographic features of deltoid contracture (DC) with MRI correlation.Two reviewers evaluated the imaging features in 22 painful shoulders of 20 patients with a sonographic diagnosis of DC and a subsequent confirming MRI study...Conmclusion:Sonography is helpful for evaluating DC and correlates well with MRI...     July 21, 2005   Should Plain X-rays be Routinely Performed After Blunt Knee Trauma? A Prospective Analysis - Journal of Trauma We tested the hypothesis that it was possible to decrease the number of performed x-rays after a knee trauma without delayed fracture diagnosis by using the Ottawa knee rules...Conclusions: Ottawa rules allowed decreasing the number of x-rays performed after a knee trauma by 35% with a sensitivity for a knee fracture detection of 100%...   Ultrasound and Power Doppler Evaluation of the Hand and Wrist in Patients with Psoriatic Arthritis - Acta Radiologica Conclusion: US proved effective in demonstrating PsA involvement of the hands and wrists and was more sensitive than clinical examination in detecting pathology. Long-term follow-up studies are needed to evaluate whether this can change the traditional approach for assessing involvement of joints and tendons in PsA... July 20, 2005   Ultrasound in rheumatology - Best Practice & Research: Clinical Rheumatology Over the last decade, several studies have highlighted the value of ultrasonography for both clinical and research purposes in rheumatology. Ultrasonography is a non-invasive, inexpensive and free-of-radiation-hazards imaging technique providing quick and useful information for the management of rheumatic diseases... July 19, 2005   Ultrasound detection of a subperiosteal abscess secondary to coalescent otomastoiditis - Australasian Radiology We report the unusual ultrasound appearance of coalescent otomastoiditis with subperiosteal abscess in a 3-month-old boy with a 1-week history of an enlarging lump behind the left ear. Ultrasound examination of the lump revealed subcutaneous oedema with an abscess extending from a defect in the cranial vault as a result of extension of the inflammatory process. We believe that this sonographic appearance has not been previously described in the published literature...   Metacarpophalangeal Pattern Profile Analysis as a Tool for Early Diagnosis of Turner Syndrome - Acta Radiologica Conclusion: TS individuals have a distinct hand pattern profile that is not age-related. MCPP analysis can be applied at any age and may facilitate early diagnosis of TS. Our study showed that MCPP analysis is a specific and sensitive method that should be considered as a routinely used tool for early diagnosis of TS in girls with unexplained short stature...     July 18, 2005   Radiography of the radial head: An alternative view - Radiography The presentation of patients at the trauma unit complaining of elbow pain following a fall onto an outstretched hand is a common occurrence and radiological examination is often helpful to detect bony abnormality. This short communication describes a radiographic technique that may be useful in the demonstration of the antero-posterior projection of the radial head where full extension of the elbow is unobtainable...   Overuse Injuries of the Upper Extremity in the Competitive Athlete: Magnetic Resonance Imaging Findings Associated with Repetitive Trauma - Current Problems in Diagnostic Radiology Overuse injuries are a very common cause of pain in athletes, accounting for a significant loss of training time and missed competitions. Magnetic resonance imaging (MRI) is playing an increasing role in facilitating the expeditious and safe return of these individuals to their preinjury level of physical performance by allowing accurate diagnosis...     July 15, 2005   Multimodality Imaging Evaluation of the Pediatric Neck: Techniques and Spectrum of Findings - Radiographics Neck masses are a common finding in children and can present a difficult diagnostic challenge. These masses may represent a variety of conditions having a congenital, acquired inflammatory, neoplastic, or vascular origin. The fascial spaces and compartments of the neck provide an approach to differential diagnosis, and extensive knowledge of the anatomy and contents of each cervical compartment is mandatory in the diagnosis of pediatric neck lesions...   Radial head fractures: MRI evaluation of associated injuries - Journal of Shoulder and Elbow Surgery The purpose of this study was to evaluate the incidence of combined osteochondral and ligamentous injuries by magnetic resonance imaging (MRI) in 24 patients with an acute radial head fracture (Mason type II and III) without documented dislocation or tenderness at the distal radioulnar joint... July 14, 2005   Cystic Masses of the Knee: Magnetic Resonance Imaging Findings - Current Problems in Diagnostic Radiology Cystic masses of the knee comprise a diverse group of pathologic entities ranging from simple cysts to complications of underlying disease to tumors. Although their presentations may be similar, the appropriate treatment and patient management can differ greatly...     July 13, 2005   Bone marrow edema in the foot-MRI findings after conservative therapy - Foot and Ankle Surgery Bone marrow edema (BME) is a rare cause of pain in the foot. We reviewed 23 patients with unilateral idiopathic bone marrow edema located in the foot...Conclusions: Bone marrow edema syndrome is rarely seen in the foot. Progress to avascular necrosis is unlikely. Conservative therapy can be recommended...   Metastatic vertebral tumor misdiagnosed in magnetic resonance imaging as benign degenerative bone marrow changes: a case report - Rheumatology International Many disorders including congenital, degenerative, inflammatory, and neoplastic lesions are associated with low back pain. It is essential to differentiate between malignant disease and the more common causes of back pain. We report a man with low back and right groin pain as a result of metastatic breast carcinoma which was misdiagnosed in magnetic resonance imaging as benign degenerative changes... July 12, 2005   Association between radiographic damage of the spine and spinal mobility for individual patients with ankylosing spondylitis: can assessment of spinal mobility be a proxy for radiographic evaluation? - Annals of Rheumatic Diseases Conclusion: This study unequivocally demonstrated a relationship between spinal mobility and radiographic damage. However, spinal mobility cannot be used as a proxy for radiographic evaluation in an individual patient... July 11, 2005   Interobserver reliability of rheumatologists performing musculoskeletal ultrasonography: results from a EULAR "Train the trainers" course - Annals of Rheumatic Diseases Conclusion: Interobserver reliabilities, sensitivities, and specificities in comparison with MRI were moderate to good. Further standardisation of US scanning techniques and definitions of different pathological US lesions are necessary to increase the interobserver agreement in musculoskeletal US... July 08, 2005   Dynamic contrast-enhanced MRI for assessing the disease activity of multiple myeloma: A comparative study with histology and clinical markers - Journal of Magnetic Resonance Imaging (Wiley) To examine whether parameters of dynamic, contrast-enhanced MRI (DCE MRI) reflect the degree of infiltration and vessel density in corresponding bone marrow biopsy specimens...Conclusion: Increased contrast uptake in the bone marrow of MM patients indicates at least moderate tumor involvement. Furthermore, the contrast enhancement correlates with vessel-density and serum markers of disease activity...     July 07, 2005   Absorbed Fractions for alpha-Particles in Tissues of Trabecular Bone: Considerations of Marrow Cellularity Within the ICRP Reference Male - The Journal of Nuclear Medicine Conclusion: Improvements in patient-specific dosimetry of skeletal tissues require explicit consideration of not only changes in target mass with variable patient marrow cellularity (i.e., active marrow) but also corresponding changes in values of the absorbed fraction. The data given in this study provide a more-firm basis for application of the MIRD schema to patient-specific dosimetry for newly developing therapies using alpha-particle emitters... July 06, 2005   Repeatability of a novel technique for in vivo measurement of three-dimensional patellar tracking using magnetic resonance imaging - Journal of Magnetic Resonance Imaging (Wiley) Conclusion: Our novel measurement technique can measure three-dimensional patellar tracking noninvasively during loaded flexion in a repeatable manner. Our results compare well to another noninvasive tracking protocol, fast phase-contrast MRI, which has a reported subject interexam variability of 2.4 or less for patellar orientation...     July 05, 2005   "Black" Contrast Effect During Magnetic Resonance Arthrography Attributable to Inadvertent Administration of Excessive Gadolinium Chelates - Journal of Computer Assisted Tomography Excessive intra-articular administration of gadolinium chelates during magnetic resonance (MR) arthrography results in decreased signal throughout the joint on MR images. A case with this condition during MR arthrography of the hip is described, and a possible solution when this problem occurs (ie, performing the MR imaging examination after a waiting period of several hours) is suggested... July 01, 2005   High-Resolution Flat-Panel Volume-CT of Temporal Bone-Part 1: Axial Preoperative Anatomy - Journal of Computer Assisted Tomography In these high-resolution images, many structures that are below the resolution limit of conventional CT can be seen and localized. It is hoped that one would be able to picture these structures and surgeries, in the mind's eye, even when they fall below the resolution limit using a conventional CT scanner. This article focuses on the preoperative axial anatomy...   Reactive Carpal Synovitis: Initial Experience with MR Imaging - Radiology To retrospectively evaluate the accuracy of various magnetic resonance (MR) imaging findings in the diagnosis of reactive carpal synovitis...Conclusion: Fluid in the pisotriquetral recess, enhancing synovium, and, less commonly, pisotriquetral bone marrow edema are MR imaging findings that may help in the diagnosis of reactive carpal synovitis...