December 2006 News Headlines

These are radiology news updates from other sites

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Date this page was last updated: 01/07/2007 03:04:58 PM

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December 19, 2006

Characterization of trabecular bone structure from high-resolution magnetic resonance images using fuzzy logic
Magnetic Resonance Imaging
Julio Carballido-Gamio, et al. - The purpose of this work was to apply fuzzy logic image processing techniques to characterize the trabecular bone structure with high-resolution magnetic resonance images. Fifteen ex vivo high-resolution magnetic resonance images of specimens of human radii at 1.5 T and 12 in vivo high-resolution magnetic resonance images of the calcanei of peri- and postmenopausal women at 3 T were obtained...


December 18, 2006

A feasibility study of in vivo T1rho imaging of the intervertebral disc
Magnetic Resonance Imaging
Gabrielle Blumenkrantza, et al. - Recent studies have proposed that magnetic resonance (MR) T1rho relaxation time is associated with loss of macromolecules...Conclusion: The results of this study suggest that in vivo T1rho quantification is feasible and may potentially be a clinical tool in identifying early degenerative changes in the intervertebral disc...

Relationship between the shape of tibial spurs on X-ray and meniscal changes on MRI in early osteoarthritis of the knee
Magnetic Resonance Imaging
Mitsuhiro Nakamuraa, et al. - Conclusions: In this study, there was a relationship between the shape of the tibial spur on X-ray and the meniscal changes on MRI in early osteoarthritis of the knee. The shape of the medial tibial spur on X-ray can be a useful indicator for predicting the progression of osteoarthritis of the knee. A downward type of medial tibial spur classification on X-ray may be a risk factor for developing severe osteoarthritis of the knee



December 15, 2006

An investigation of the impact/potential impact of a four-tier profession on the practice of radiography
Amanda J. Woodford, et al. - Increased demands for radiology services and a shortage of radiologists and radiography staff have been factors driving skills mix and radiographer role development. The blurring of professional boundaries, greater workforce flexibility and a team approach contribute to the provision of high quality patient service ...

Imaging of musculoskeletal infections
Best Practice & Research: Clinical Rheumatology
Christopher J. Palestro MD, et al. - Imaging procedures are routinely used to evaluate patients suspected of having musculoskeletal infection. Radiographs should be performed whenever musculoskeletal infection is suspected. Even when not diagnostic, radiographs are useful. They provide an anatomic overview of the region of interest, including pre-existing conditions that could influence the selection and interpretation of subsequent procedures...


December 14, 2006

Computed Tomography of Musculoskeletal Pathology
Orthopedic Special Edition
Laura M. Fayad, MD, et al. - This article discusses the evolving role of 16-slice multidetector computed tomography, isotropic data, and 3D volume visualization. The role of computed tomography (CT) imaging in the evaluation of the musculoskeletal system continues to evolve...
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Long-Term Clinical and Radiographic Follow-Up of Total Resection for Discoid Lateral Meniscus
Takashi Habata M.D, et al. - Conclusions: The clinical results were satisfactory and the postoperative arthritic changes were mild in patients aged under 40 years. However, it is necessary to carefully monitor arthritic progression in patients who are aged over 19 years and have valgus deformities, because most of the knees in patients above this age became more valgus postoperatively...

What is MRI bone oedema in rheumatoid arthritis and why does it matter?
Arthritis Research & Therapy
Fiona M McQueen, et al. - MRI bone oedema occurs in various forms of inflammatory and non-inflammatory arthritis and probably represents a cellular infiltrate within bone. It is common in early rheumatoid arthritis and is associated with erosive progression and poor functional outcome. Histopathological studies suggest that a cellular infiltrate comprising lymphocytes and osteoclasts may be detected in subchondral bone and could mediate the development of erosions from the marrow towards the joint surface...



December 13, 2006

Hajdu-Cheney syndrome: Report of a family and a short literature review
Australasian Radiology
Marik, et al. - We report three members of an Armenian family with Hajdu-Cheney syndrome. The history suggested that five other members of the family were also probably affected. This disorder is important for the radiologist because distinctive radiographic findings make the diagnosis possible before clinical signs and symptoms are fully developed. Additionally, radiographic examination is essential in all patients suspected of Hajdu-Cheney syndrome for confirmation of the clinical diagnosis...

Patterns of Red Marrow in the Adult Femur
Clinical Nuclear Medicine
Kim, Suk Chul MD, et al. - Conclusions: A considerably higher number of adults showed pattern B than pattern C. This suggests that regeneration of diaphyseal marrow precedes that of the distal marrow in an individual long bone or possibly that conversion of the latter precedes the former, which is different from that proposed in the literature...

Establishing a Popliteal Portal Using the METRx System Under Ultrasound Guidance
Ta-Feng Ho M.D., et al. - This report describes a special technique for safe establishment of a popliteal portal with the METRx system (Medtronic Sofamor Danek, Memphis, TN) under ultrasound guidance with the patient in the awake state. Herbert screws located at the posterior tibial plateau were removed via this portal in a minimally invasive way...


December 12, 2006

Long-standing Morel-Lavallée lesion in the proximal thigh: Ultrasound and MR findings with surgical and histopathological correlation
Australasian Radiology
Puig, et al. - A 65-year-old man presented with a soft mass in his proximal right thigh. Ultrasonography showed a well-defined anechoic lesion with slightly internal echoes. On MRI, the mass was hypointense and minimally hyperintense compared with muscle at T1 and hyperintense at T2, with a hypointense peripheral rim on both sequences. No signal loss was observed on T1-weighted fat-suppression MRI. The clinical setting, imaging findings and histopathological features were consistent with a long-standing Morel-Lavallée lesion...

Determination of in-vivo articular cartilage contact areas of human talocrural joint under weightbearing conditions
Osteoarthritis and Cartilage
L. Wan B.S, et al. - Conclusion: The combined dual fluoroscopic and MR imaging technique was shown to be capable of determining in-vivo talocrural cartilage contact areas. During the simulated stance phase of walking, the contact areas were less than 44% and 31% of the cartilage coverage areas of the distal tibia and the proximal talus, respectively. These data may be useful for understanding in-vivo biomechanical function of the cartilage as well as the etiology of osteoarthritis...


December 11, 2006

Dental panoramic tomography: An approach for the general radiologist
Australasian Radiology
Boeddinghaus; Whyte - Dental panoramic tomography is commonly presented to radiologists with no dental training for interpretation. An overview of the technique, basic anatomy and nomenclature and common pathology is presented with examples to show the anatomy and nomenclature, the artefacts and common pathology...

Diagnosis of the "large medial meniscus" of the knee on MR imaging
Magnetic Resonance Imaging
Nobuhiko Samoto, et al. - Although several quantitative magnetic resonance (MR) diagnostic criteria for discoid lateral meniscus (DLM) have been described, there are no criteria by which to estimate the size of the medial meniscus. We define a medial meniscus that exceeds the normal size as a ?large medial meniscus? (LMM), and the purpose of this study is to establish the quantitative MR diagnostic criteria for LMM...

Cluster Analysis as a Method for Determining Size Ranges for Spinal Implants: Disc Lumbar Replacement Prosthesis Dimensions from Magnetic Resonance Images
Lei, Dang MB, et al. - To develop an objective method for finding the number of sizes for a lumbar disc replacement...Conclusions: Cluster analysis has been successfully used to find the dimensions of the minimum number of prosthesis sizes required to replace L3-L4 to L5-S1 discs; the range of sizes would enable them to be used at higher lumbar levels in some patients



December 8, 2006

Tendinopathy and Doppler activity: the vascular response of the achilles tendon to exercise
Scandinavian Journal of Medicine and Science in Sports
Boesen, M. I., et al. - The mere presence of Doppler in the Achilles tendon does not per se indicate disease. Eccentric exercise does not extinguish the flow during or after one training session in patients with chronic AT...

Effects of neurosurgical titanium mesh on radiation dose
Medical Dosimetry
Hassisen Patone M.D, et al. - The purpose of this study was to determine the dosimetric impact of a neurosurgical titanium mesh in patients treated with 6- and 18-MV photon beams. The effects of a 0.4-mm-thick titanium mesh on the dose profile at 3 regions within a solid water phantom were measured using extended dose range-2 (EDR2) film for 6- and 18-MV photon beams...


December 7, 2006

Three-dimensional recording of the human face with a 3D laser scanner
Journal of Plastic, Reconstructive & Aesthetic Surgery
L. Kovacs, et al. - Three-dimensional recording of the surface of the human body or of certain anatomical areas has gained an ever increasing importance in recent years. When recording living surfaces, such as the human face, not only has a varying degree of surface complexity to be accounted for, but also a variety of other factors, such as motion artefacts...

Functional Pelvic Orientation Measured from Lateral Standing and Sitting Radiographs
Clinical Orthopedics and Related Research
DiGioia, Anthony M III MD, et al. - We prospectively obtained preoperative and 3-month postoperative lateral pelvic radiographs in the standing and sitting positions from 84 patients who underwent total hip arthroplasty. We measured pelvic orientation (flexion extension) using the anterior pelvic plane as defined by the anterior superior iliac spines and pubic tubercles as references...


December 6, 2006

186Re-HEDP in the Treatment of Patients with Inoperable Osteosarcoma
The Journal of Nuclear Medicine
Rizwan Syed, et al. - Conclusion: This study indicates that a simple approach to tumor dosimetry based on mean tumor dose is inappropriate because it may underestimate the dose delivered to these heterogeneous tumors. The data also indicate that EBRT combined with a standard dose of 18.5 MBq/kg of 186Re-HEDP does not provide a sufficient dose to achieve tumor sterilization...

The Value of Anteroposterior Pelvic Radiographs for Evaluating Pelvic Osteolysis
Clinical Orthopedics and Related Research
Kitamura, Nobuto MD, et al. - We investigated the role of conventional radiographs and computed tomography scans for the routine followup of total hip arthroplasty patients. Among 92 total hip arthroplasties with a mean followup of 8.5 years, 94 acetabular lesions were detected among 63 hips using computed tomography and 42 of these hips had osteolysis diagnosed on radiograph...

Three-dimensional easy morphological (3-DEMO) classification of scoliosis: Part I
BMC Musculoskeletal Disorders
Stefano Negrini, et al. - Conclusion: The 3-DEMO classification offers a new and simple way of viewing the spine through an auxiliary plane using a spinal reference system. Further studies are currently under way to compare this new system with the existing 3-D classifications, to obtain it using everyday clinical and x-rays data, and to develop a triage for clinical use...


December 5, 2006

Bone oedema predicts erosive progression on wrist MRI in early RA - a 2-yr observational MRI and NC scintigraphy study
Kari Palosaari, et al. - Conclusion: The degree of local synovial inflammation at baseline, evaluated by dynamic and static MRI and quantitative NC scintigraphy, is closely related to the progression of wrist joint erosions during the first 2 yrs of the disease. Furthermore, at follow-up, if no persistent clinical response is achieved, these imaging methods may help to predict future erosiveness and help in clinical therapeutic decision making...

Usefulness of Hybrid SPECT/CT in 99mTc-HMPAO?Labeled Leukocyte Scintigraphy for Bone and Joint Infections
The Journal of Nuclear Medicine
Luca Filippi, et al. - White blood cell scanning with 99mTc-hexamethylpropylene amine oxime (HMPAO) has proven highly sensitive and specific in the diagnosis and follow-up of patients with suspected osteomyelitis...Conclusion: Our results indicate that SPECT/CT performed using a hybrid device can improve imaging with 99mTc-HMPAO?labeled leukocytes in patients with suspected osteomyelitis by providing accurate anatomic localization and precise definition of the extent of infection...

Development of a Novel 99mTc-Chelate?Conjugated Bisphosphonate with High Affinity for Bone as a Bone Scintigraphic Agent
The Journal of Nuclear Medicine
Kazuma Ogawa, et al. - Conclusion: We developed a novel 99mTc-chelate?conjugated bisphosphonate with high affinity for bone and rapid clearance from blood, based on the concept of bifunctional radiopharmaceuticals. The present findings indicate that 99mTc-HYNIC-HBP holds great potential for bone scintigraphy...



December 4, 2006

Diagnosis of Scaphoid Fracture Displacement with Radiography and Computed Tomography
Journal of Bone and Joint Surgery
Santiago Lozano-Calderón, MD, et al. - Conclusions: Computed tomography improves the reliability of detecting scaphoid fracture displacement but has a more limited effect on accuracy, which remains <80%. The utility of computed tomography scans for diagnosing scaphoid fracture displacement is affected by the low prevalence of fracture displacement...


December 1, 2006

Magnetic Resonance Imaging Abnormalities in Symptomatic and Contralateral Knees
American Journal of Sports Medicine
Simone S. Boks, MD, et al. - After trauma, internal knee lesions are found in approximately two thirds of patients...Conclusion: Ligament knee lesions are most probably the result of recent trauma. Radial, longitudinal, and complex meniscal tears are strongly related to trauma, whereas horizontal meniscal tears and effusion may be preexistent in many cases...

Iterative Decomposition of Water and Fat with Echo Asymmetry and Least-Squares Estimation (IDEAL) Fast Spin-Echo Imaging of the Ankle: Initial Clinical Experience
American Journal of Roentgenology
Samuel Fuller, et al. - Reliable, uniform fat suppression is important. Multiple approaches currently exist, many of which suffer from either suboptimal signal-to-noise ratio (SNR), or the inability to obtain consistent fat suppression around the ankle joint..Conclusion: IDEAL fast spin-echo imaging is a promising technique for MRI of the ankle...

MRI-Negative, Bone Scintigram-Positive in Early Osteonecrosis of the Knees
Clinical Nuclear Medicine
Warwick, Bruce J. M. MB BS, FRACS, FAOrthoA, et al. - Nontraumatic avascular necrosis (AVN) of bone is a well-reported complication of glucocorticoid therapy for immunologic and malignant disease. We present the case of a 13-year-old girl with no history of trauma who presented with a 5-day history of increasing pain in both knees after cord blood transplantation for acute lymphoblastic leukemia. Plain film and magnetic resonance imaging (MRI) were reported as normal. Bone scintigraphy revealed evidence of bilateral avascular necrosis in the distal femora...