Anteroposterior, lateral, and right and left oblique lumbar spine radiographs are often a standard part of the evaluation of children who are clinically suspected of having spondylolysis. Recent concerns regarding radiation exposure and costs have brought the value of oblique radiographs into question. The purpose of the present study was ...

Study Design. A prospective multimodal study including clinical, radiological, serial post contrast MRI, intraoperative findings and histopathological study.Objective. To document in-vivo, the site of anatomical failure in lumbar disc herniation (LDH). Summary of Background Data: Although in-vitro mechanical disruption studies have implicated both the end plate junction and the annulus ...

OBJECTIVE. The purpose of this article is to review the clinical and imaging features as well as the potential complications of hip dysplasia in the young adult. Hip dysplasia is an important cause of secondary osteoarthrosis, which accounts for a significant proportion of patients requiring total hip arthroplasty. The radiographic ...

The aims of this study were to investigate the prevalence of ultrasound (US) pathologic abnormalities in the shoulders of psoriatic arthritis (PsA) patients and to compare them with the main clinical findings. Ninety-seven PsA patients were enrolled in the study. The subacromial/subdeltoid bursa, the sheath of the long biceps tendon, ...

Purpose To evaluate the computed tomography (CT) findings of intracranial hemorrhage among patients with head trauma in Lagos, Nigeria. Methods In this retrospective, cross-sectional study, a convenience sample of 500 patients with head trauma who had diagnostic cranial CT scans was selected. All the radiological reports and CT scans of ...

OBJECTIVES: A pivotal MRI study of knee arthritis indicated that enthesitis was more frequently observed in established spondyloartritis (SpA) than rheumatoid arthritis (RA). Subsequent MRI and ultrasound studies, however, failed to consistently demonstrate primary synovitis in RA versus primary enthesitis in SpA. Therefore, the current study aimed to reassess enthesitis ...

In MR images, the median nerve of carpal tunnel syndrome (CTS) patients frequently appears flatter than in healthy subjects. The purpose of this work was to develop a metric to quantify localized median nerve deformation rather than global nerve flattening, the hypothesis being that localized median nerve deformation would be ...

Objectives: To monitor repair of bone erosions using magnetic resonance imaging (MRI) in patients with rheumatoid arthritis (RA) during etanercept combination therapy. Method: The study population comprised 29 RA patients [biologic-naïve, 28-joint Disease Activity Score (DAS28) ≥ 3.2] starting etanercept combination therapy with disease-modifying anti-rheumatic drugs (DMARDs) and completing the ...

The purpose of this study is to evaluate the ability of T2 turbo spin echo (TSE) axial and sagittal BLADE sequences in reducing or even eliminating motion, pulsatile flow and cross-talk artifacts in lumbar spine MRI examinations. Forty four patients, who had routinely undergone a lumbar spine examination, participated in ...

PURPOSE: To evaluate the diagnostic accuracy of (18)F-FDG PET/CT for detecting recurrence in patients with primary skeletal Ewing sarcoma. METHODS: We retrospectively analysed data from 53 patients (age 20.1 ± 10.5 years, 39 male) who had undergone 71 (18)F-FDG PET/CT studies for suspected recurrence (52 studies) or for routine follow-up (19 studies) after ...

To evaluate the visibility of the superior and inferior borders of mandibular canal using panoramic radiography (PR) and cross-sectional computed tomography (CT) images. Digital panoramic images and cross-sectional CT images of 100 patients were evaluated. The mandibular canal was divided into 4 areas of equal width (1-4), from anterior to ...

Magnetic resonance imaging (MRI) of a 27 week gestation female fetus suggested an abnormal rectum. Subsequent examination of the term newborn confirmed an imperforate anus present in the normal position. No meconium was seen on the perineum by 18 hours. A prone cross-table lateral radiograph confirmed that rectal gas was ...

INTRODUCTION: Magnetic resonance imaging (MRI) is increasingly being used in clinical trials of rheumatoid arthritis (RA) because of its superiority over X-ray radiography (XR) in detecting and monitoring change in bone erosion, osteitis and synovitis. However, in contrast to XR, the MRI scoring method that was used in most clinical ...

BACKGROUND AND PURPOSE:Alleviation of aneurysm induced mass effect has been difficult with both conventional endovascular and surgical techniques. Our aim was to study the efficacy of endovascular flow modification on aneurysm-induced mass effect and compression syndrome, as demonstrated by cross-sectional imaging studies and clinical follow-up.MATERIALS AND METHODS:Thirty aneurysms larger than ...

Advances in technology and software applications have contributed to new imaging modalities and strategies in the evaluation of patients with suspected acute cerebral infarction. Routine computed tomography (CT) and magnetic resonance imaging (MRI) have been the standard studies in stroke imaging, which have been complemented by CT and MR angiography, ...

This study compared cross-sectional three-dimensional (3D) transesophageal echocardiography (TEE) to two-dimensional (2D) TEE as methods for predicting aortic regurgitation after transcatheter aortic valve replacement (TAVR). Data have shown that TAVR sizing using cross-sectional contrast computed tomography (CT) parameters is superior to 2D-TEE for the prediction of paravalvular aortic regurgitation (AR). ...

Purpose: Other than a single case report, no diffusion tensor tractography (DTT) studies of the precommissural fornix in the human brain have been conducted. In the current study, we attempted to visualize the precommissural fornix in the human brain using DTT. Materials and Methods: We recruited 36 healthy volunteers for ...

A cross-sectional imaging study. The objective was to assess the degree of degeneration and the associated factors through imaging studies of the lesion segment and the adjacent superior and inferior segments of isthmic and degenerative spondylolisthesis. Few articles existed for degeneration and related factors in isthmic and degenerative spondylolisthesis. The ...

 Littoral- cell angioma (LCA) is a rare vascular tumor of the spleen. It was thought to be a benign, incidental lesion. However, many recent reports have described it to be a malignant  lesion with congenital and immunologic associations. We report a case of LCA of the spleen, which has been ...

We report a patient with a seronegative autoimmune panencephalitis, adding a subtype to the emerging spectrum of seronegative autoimmune encephalitis, and we review the sparse literature on isolated psychiatric presentations of autoimmune encephalitis. (A PubMed search for "seronegative autoimmune encephalitis," "nonvasculitic autoimmune inflammatory meningoencephalitis," and related terms revealed <25 cases.) ...

The third-integer coupling resonance at ν_{x}-2ν_{z}=ℓ, known as the Walkinshaw resonance, is important in high-power accelerators. We find that, when the betatron tunes ramp through a Walkinshaw resonance the fractional emittance growth (FEG) is a universal function of the effective resonance strength: G_{1,-2,ℓ}sqrt[ϵ_{xi}]|Δ(ν_{x}-2ν_{z})/Δn|^{-1/2}, where G_{1,-2,ℓ} is the resonance strength; ϵ_{xi} ...

STUDY DESIGN:: A retrospective study of 58 patients undergoing cantilever transforaminal lumbar interbody fusion (c-TLIF). OBJECTIVE:: To evaluate morphological changes in the intervertebral foramen on the side contralateral to spacer insertion in patients undergoing c-TLIF using plain X-ray films and CT scan. SUMMARY OF BACKGROUND DATA:: The morphological changes in ...

STUDY DESIGN:: In vivo measurement of lumbar foramen using computed tomography (CT) and an axial loading device in healthy young subjects. OBJECTIVE:: To investigate the effects of axial loading on the morphology of the lumbar foramen in vivo. SUMMARY OF BACKGROUND DATA:: In vitro studies have shown morphologic changes in ...

Changes in morphometry of head and neck muscles have received little attention in research relative to limb muscles. While recent literature suggests that high-frequency ultrasound transducers can provide superior spatial resolution compared to that of magnetic resonance imaging (MRI), no studies have compared these imaging methods for investigating the submental ...

OBJECTIVES: To evaluate the methodological quality of diagnostic accuracy studies on coronary computed tomography (CT) angiography using the QUADAS (Quality Assessment of Diagnostic Accuracy Studies included in systematic reviews) tool. METHODS: Each QUADAS item was individually defined to adapt it to the special requirements of studies on coronary CT angiography. ...

The clinicoradiologic paradox, or disconnect between clinical and radiologic findings, is frequently encountered in multiple sclerosis (MS), particularly in the spinal cord (SC), where lesions are expected to cause clinical impairment. We aimed to assess whether quantitative diffusion tensor and magnetization transfer imaging measures in the SC can distinguish MS ...

Psoriatic arthritis (PsA) is a chronic inflammatory joint disease which develops in patients with psoriasis. The rheumatoid factor is characteristically absent in the serum of PsA patients. Etiology of the disease is still unclear but a number of genetic associations have been identified. Inheritance of the disease is multilevel and ...

We report a 25-year-old young man presenting with cognitive decline, pancerebellar features, spastic quadriparesis, bilateral cataract (operated) and tendo-Achilles swelling (xanthoma). The CT of the head showed bilateral cerebellar hypodensities. There were bilateral cerebellar hypointensities involving dentate nuclei on T1-weighted images with corresponding hyperintensities on T2-weighted MRI. Additionally, an interesting ...

This study focuses on CT and MR studies of adult patient with giant lesion of the posterior cranial fossa associated with micro- and macroaccumulations with density and signal like "fat" at the level of the cortical and cisternal cerebral spaces. This condition is compatible with previous asymptomatic ruptured dermoid cyst. ...

Abnormal liver function tests (LFTs) are a common cause for referral to hepatology outpatient departments. Cross-sectional imaging may reveal a liver lesion. We report the case of a 33-year-old man who presented with abdominal pain and deranged LFTs and was found to have a large liver cyst on ultrasound scanning. ...

ABSTRACT: "Drop foot" palsy attributed to the prolonged and repetitive maintenance of the crossed-leg posture has been occasionally reported. We report, to the best of our knowledge, the first case of magnetic resonance imaging evidence of peroneal nerve abnormalities related to right drop-foot palsy in a tall healthy subject with ...

Cadaver experiments and clinical studies suggest that the superior labrum-biceps complex plays a role in glenohumeral stability. Superior labrum anterior to posterior (SLAP) tears can be present in acute and recurrent glenohumeral dislocations and contribute to glenohumeral instability. Isolated SLAP tears can cause instability, especially in throwing athletes. Diagnosing a ...

An experimental and ab initio computational study of an unsymmetrical, hydride-bridged di-dysprosium single-molecule magnet is reported.

PURPOSE: We aimed to assess the relationship between bone inflam- mation in multi-pinhole single-photon emission computed tomography (MPH-SPECT) and synovitis detected by mag- netic resonance imaging (MRI) in early rheumatoid arthritis patients. MATERIALS AND METHODS: MPH-SPECT with technetium-99m dicarboxypropanedis- phosphonate (Tc-99m DPD) and 3 Tesla MRI were performed in 10 ...

OBJECTIVE: The aim of the study was to evaluate early metabolic changes using proton MR spectroscopy (MRS) in asymptomatic HIV-1-positive and HCV-positive patients without abnormalities in the structural MR examination. METHODS: Sixty-five asymptomatic patients: 21 HIV-1-positive naive, 20 HIV-1-positive with combination antiretroviral therapy (cART), 9 HIV-1/HCV-positive naive, 15 HCV-positive naive ...

BACKGROUND: Diffusion tensor imaging (DTI) is a promising method for identifying significant cross-sectional differences of white-matter tracts in normal controls (NC) and those with mild cognitive impairment (MCI) or Alzheimer's disease (AD). There have not been many studies establishing its longitudinal utility. METHODS: Seventy-five participants (25 NC, 25 amnestic MCI, ...

As the largest single lymphatic organ in the human body, the spleen is responsible for central immunological and haematological tasks. Therefore, the spleen can be subject to a wide range of pathologic disorders. Computed tomography (CT) represents the most widely applied cross-sectional abdominal imaging technique and is considered the imaging ...

OBJECTIVES: There are limited data comparing imaging modalities in the diagnosis of pancreas divisum. We aimed to: (1) evaluate the sensitivity of endoscopic ultrasound (EUS), magnetic resonance cholangiopancreatography (MRCP), and multidetector computed tomography (MDCT) for pancreas divisum; and (2) assess interobserver agreement (IOA) among expert radiologists for detecting pancreas divisum ...

Imaging with CT, MRI, or fluorodeoxyglucose F 18-positron emission tomography is often an important complement to laryngoscopy for diagnosis and management of laryngeal pathology. At most centers, CT is the most popular modality for general laryngeal imaging given its widespread availability, ease of acquisition, and familiarity to clinicians, whereas MRI ...

The purposes of this study were to determine the clinical importance and relative value of reinterpretation of brain CT studies by subspecialty experts by assessing the accuracy of interpretation by general radiologists at primary stroke centers and to assess interpretive quality outcomes as a function of change in the treatment ...

PURPOSE: The aim of the study was to assess the distribution of accessory foramina in the mandibular body with computed tomography (CT). MATERIALS AND METHODS: The CT images of the mandibular body in 300 subjects (183 females and 117 males aged between 12 and 85 years) were retrospectively analysed for ...

RATIONALE, AIMS AND OBJECTIVES: Magnetic resonance imaging (MRI) is widely used in stroke evaluation and is superior to computed tomography for the detection of acute ischaemia. We sought to evaluate the evidence that conventional MRI influences doctor management or patient outcomes in routine care. METHODS: We systematically searched PubMED, EMBASE ...

OBJECTIVES: To evaluate the utility of sequentially acquired, post hoc fused, magnetic resonance imaging (MRI) and multi-pinhole single photon emission computed tomography (MPH-SPECT) with technetium-99m-labeled disphosphonates (Tc99m-DPD) for the identification of finger joints with later erosive progression in early rheumatoid arthritis (ERA) patients. METHODS: Ten consecutive ERA patients prospectively underwent ...

In patients with unilateral pharyngeal paresis and dysphagia, the head is rotated to the paretic side to prevent food flow to the rotated side during swallowing. Only a few studies to date have reported on pyriform sinus morphology upon head rotation. The purpose of this study was to measure the ...

Purpose: To estimate attenuation using cross sectional CT images and scanned projection radiograph (SPR) images in a series of thorax and abdomen phantoms.Methods: Attenuation was quantified in terms of a water cylinder with cross sectional area of A(w) from both the CT and SPR images of abdomen and thorax phantoms, ...

BACKGROUND AND PURPOSE:Studies have assessed PET by using various tracers to diagnose disease recurrence in patients with previously treated glioma; however, the accuracy of these methods, particularly compared with alternative imaging modalities, remains unclear. We conducted a meta-analysis to quantitatively synthesize the diagnostic accuracy of PET and compare it with ...

Study Design. A cross-sectional study.Objective. To assess using postoperative magnetic resonance imaging (MRI) whether the posterior longitudinal ligament (PLL) caused residual cord compression after anterior cervical decompression and fusion (ACDF) in a series of patients in whom the PLL was retained.Summary of Background Data. There is a lack of data ...

OBJECTIVE: Aim of our study was to identify anatomical risk factors involved in the development of pediatric OSAHS through a MRI-based case-control pilot study. METHODS: MRI exams of the head and neck of 40 children affected by OSAHS were retrospectively evaluated. 25 indices referring to the air lumen, soft tissues ...

Delivery of therapeutic or diagnostic agents across an intact blood-brain barrier (BBB) remains a major challenge. Here we demonstrate in a mouse model that magnetic nanoparticles (MNPs) can cross the normal BBB when subjected to an external magnetic field. Following a systemic administration, an applied external magnetic field mediates the ...

There is uncertainty about the optimal approach to screen for clinically important cervical spine (C-spine) injury following blunt trauma. We conducted a systematic review to investigate the diagnostic accuracy of the Canadian C-spine rule and the National Emergency X-Radiography Utilization Study (NEXUS) criteria, 2 rules that are available to assist ...