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Radiology Research and Practice

Emma Olsson, Ronnie Wirestam, Emelie Lind
The local magnetic field inside and around an object in a magnetic resonance imaging unit depends on the magnetic susceptibility of the object being magnetized, in combination with its geometry/orientation. Magnetic susceptibility can thus be exploited as a source of tissue contrast, and susceptibility imaging may also become a useful tool in contrast agent quantification and for assessment of venous oxygen saturation levels. In this study, the accuracy of an established procedure for quantitative susceptibility mapping (QSM) was investigated...
2018: Radiology Research and Practice
Muhammad Anwar, John Wood, Deepa Manwani, Benjamin Taragin, Suzette O Oyeku, Qi Peng
[This corrects the article DOI: 10.1155/2013/628150.].
2018: Radiology Research and Practice
Majed O Aljuaid, Osama R El-Ghamry
Introduction: The use of radiographic data for determination of age, according to the epiphyseal union stage, is a widely accepted method and considered scientifically approved. The aim of the present work is to estimate the age of epiphyseal union of hand and knee joints bones among Saudi population in Taif City. Subjects and Method: A retrospective cross-sectional study was conducted in the Armed Forces Hospitals (4 hospitals) in Taif City. The five-stage method was used for the union assessment...
2018: Radiology Research and Practice
Nima Kasraie, Amie Robinson, Sherwin Chan
Interpretation of radiolucent foreign bodies (FBs) is a common task charged to pediatric radiologists. The use of a motion compensated technique to decrease breathing motion on images would greatly decrease overall exposure to ionizing radiation and increase access to treatment yielding a great impact on clinical care. This study reports on the methodology and materials used to construct an in-house anthropomorphic phantom for investigating image quality in digital tomosynthesis protocols for volumetric imaging of the pediatric airway...
2018: Radiology Research and Practice
Shamar J Young, Ronald G Quisling, Sharatchandra Bidari, Tina S Sanghvi
Purpose: Intracranial hypotension (IH) often remains undetected using current MR diagnostic criteria. This project aims to demonstrate that central incisural herniation is highly effective in helping to make this diagnosis. Materials and Methods: Magnetic resonance imaging (MRI) was analyzed in 200 normal and 81 clinically known IH patients. MRI reference lines approximating the plane of the incisura, the plane of the diaphragma sella, the plane of the foramen magnum, and the plane of the visual pathway were utilized to measure the position of selected brain structures relative to these reference lines...
2018: Radiology Research and Practice
Shi-Neng James Ling, Aidan J Cleary
Background. Torus or buckle distal radius fractures are common injuries in the pediatric population. By definition, they are stable and can be treated conservatively with a wrist splint or soft crepe bandage. Objective. The objective of this study was to evaluate the utility of serial radiographs in the clinical outcome of children with stable distal radius buckle fractures. Materials and Methods. A one-month retrospective analysis was undertaken at two major hospitals in Queensland-Logan and Redlands Hospital...
2018: Radiology Research and Practice
Lucie Sukupova, Ondrej Hlavacek, Daniel Vedlich
The effect of the ceiling-mounted radiation shielding on the amount of the scatter radiation was assessed under conditions simulating obese patients for clinically relevant exposure parameters. Measurements were performed in different projections and with different positions of the ceiling-mounted shielding: without shielding; shielding closest to the patient; and shielding closest to the physician performing the procedure. The protection provided by the shielding was assessed for cardiology when the femoral access is used and for radiology when the physician performs the procedure in the abdominal area...
2018: Radiology Research and Practice
Aikaterini Solomou, Pantelis Kraniotis, Aspasia Rigopoulou, Theodore Petsas
Introduction: Low back pain (LBP) is common in children and adolescents. There are many factors that cause LBP, including structural disorders, degenerative changes, Scheuermann's disease, fractures, inflammation, and tumors. Magnetic Resonance Imaging is the gold standard for diagnosing spinal abnormalities and is mandatory when neurological symptoms exist. The study focuses on common MRI findings in adolescents with persistent LBP, without history of acute trauma or evidence of either inflammatory or rheumatic disease...
2018: Radiology Research and Practice
Aidonis Rammos, Vasileios Meladinis, Georgios Vovas, Dimitrios Patsouras
Restrictive cardiomyopathy (RCM) is the least common among cardiomyopathies. It can be idiopathic, familial, or secondary to systematic disorders. Marked increase in left and/or right ventricular filling pressures causes symptoms and signs of congestive heart failure. Electrocardiographic findings are nonspecific and include atrioventricular conduction and QRS complex abnormalities and supraventricular and ventricular arrhythmias. Echocardiography and cardiac magnetic resonance (CMR) play a major role in diagnosis...
2017: Radiology Research and Practice
Priya Bhattacharji, William Moore
Introduction: To evaluate the accuracy of a quantitative 3D navigation system for CT-guided interventional procedures in a two-part study. Materials and Methods: Twenty-two procedures were performed in abdominal and thoracic phantoms. Accuracies of the 3D anatomy map registration and navigation were evaluated. Time used for the navigated procedures was recorded. In the IRB approved clinical evaluation, 21 patients scheduled for CT-guided thoracic and hepatic biopsy and ablations were recruited...
2017: Radiology Research and Practice
Boniface Moifo, Ulrich Tene, Jean Roger Moulion Tapouh, Odette Samba Ngano, Justine Tchemtchoua Youta, Augustin Simo, Joseph Gonsu Fotsin
BACKGROUND: Clinical imaging guidelines (CIGs) are suitable tools to enhance justification of imaging procedures. OBJECTIVE: To assess physicians' knowledge on irradiation, their self-perception of imaging prescriptions, and the use of CIGs. MATERIALS AND METHODS: A questionnaire of 21 items was self-administered between July and August 2016 to 155 referring physicians working in seven university-affiliated hospitals in Yaoundé and Douala (Cameroon)...
2017: Radiology Research and Practice
P F Felisaz, G Maugeri, V Busi, R Vitale, F Balducci, S Gitto, P Leporati, A Pichiecchio, M Baldi, F Calliada, L Chiovato, S Bastianello
The aim of this study was to assess with MRI morphometric ultrastructural changes in nerves affected by diabetic peripheral neuropathy (DPN). We used an MR micro-neurography imaging protocol and a semiautomated technique of tissue segmentation to visualize and measure the volume of internal nerve components, such as the epineurium and nerve fascicles. The tibial nerves of 16 patients affected by DPN and of 15 healthy volunteers were imaged. Nerves volume (NV), fascicles volume (FV), fascicles to nerve ratio (FNR), and nerves cross-sectional areas (CSA) were obtained...
2017: Radiology Research and Practice
Toan Pham, Bob Anh Tran, Kevin Ooi, Marcus Mykytowycz, Stephen McLaughlin, Matthew Croxford, Iain Skinner, Ian Faragher
Introduction . We aimed to assess the efficacy and safety of digital subtraction angiography (DSA) and super-selective mesenteric artery embolization (SMAE) in managing lower GI bleeding (LGIB). Method . A retrospective case series of patients with LGIB treated with SMAE in our health service. Patients with confirmed active LGIB, on either radionuclide scintigraphy (RS) or contrast-enhanced multidetector CT angiography (CE-MDCT), were referred for DSA +/- SMAE. Data collected included patient characteristics, screening modality, bleeding territory, embolization technique, technical and clinical success, short-term to medium-term complications, 30-day mortality, and progression to surgery related to procedural failure or complications...
2017: Radiology Research and Practice
Nicholas M Beckmann
Calcium apatite deposition disease (CADD) is a common entity characterized by deposition of calcium apatite crystals within and around connective tissues, usually in a periarticular location. CADD most frequently involves the rotator cuff. However, it can theoretically occur in almost any location in the musculoskeletal system, and many different locations of CADD have been described. When CADD presents in an unexpected location it can pose a diagnostic challenge, particularly when associated with pain or swelling, and can be confused with other pathologic processes, such as infection or malignancy...
2016: Radiology Research and Practice
Yan Zhang, Sihai Wan, Ge Wen, Xuelin Zhang
Aim. Investigate the disruption of geniculocalcarine tract (GCT) in different occipital neoplasm by diffusion tensor imaging (DTI). Methods. Thirty-two subjects (44.1 ± 3.6 years) who had single occipital neoplasm (9 gliomas, 6 meningiomas, and 17 metastatic tumors) with ipsilateral GCT involved and thirty healthy subjects (39.2 ± 3.3 years) underwent conventional sequences scanning and diffusion tensor imaging by a 1.5T MR scanner. The diffusion-sensitive gradient direction is 13. Compare the fractional anisotropy (FA) and mean diffusivity (MD) values of healthy GCT with the corresponding values of GCT in peritumoral edema area...
2016: Radiology Research and Practice
Sharon Chen, Yu-Chang Tyan, Jui-Jen Lai, Chin-Ching Chang
Purpose. Quantitative cerebral blood flow (CBF) measurement using dynamic susceptibility contrast- (DSC-) MRI requires accurate estimation of the arterial input function (AIF). The present work utilized the independent component analysis (ICA) method to determine the AIF in the regions adjacent to the middle cerebral artery (MCA) by the alleviated confounding of partial volume effect. Materials and Methods. A series of spin-echo EPI MR scans were performed in 10 normal subjects. All subjects received 0.2 mmol/kg Gd-DTPA contrast agent...
2016: Radiology Research and Practice
Miriam E Peckham, Khashayar Dashtipour, Barbara A Holshouser, Camellia Kani, Alex Boscanin, Kayvan Kani, Sheri L Harder
Background and Purpose. To determine whether the pattern of iron deposition in the fascicula nigrale in patients with Parkinson's disease would be different from age-matched controls by utilizing quantitative susceptibility mapping to measure susceptibility change. Methods. MRIs of the brain were obtained from 34 subjects, 18 with Parkinson's disease and 16 age- and gender-matched controls. Regions of interest were drawn around the fascicula nigrale and substantia nigra using SWI mapping software by blinded investigators...
2016: Radiology Research and Practice
Radha Sarawagi, Shyam Sundar, Sanjeev K Gupta, Sameer Raghuwanshi
Background. Anatomical variations of cystic duct (CD) are frequently unrecognized. It is important to be aware of these variations prior to any surgical, percutaneous, or endoscopic intervention procedures. Objectives. The purpose of our study was to demonstrate the imaging features of CD and its variants using magnetic resonance cholangiopancreatography (MRCP) and document their prevalence in our population. Materials and Methods. This study included 198 patients who underwent MRCP due to different indications...
2016: Radiology Research and Practice
Idil Gunes Tatar, Kerim Bora Yilmaz, Alpaslan Sahin, Hasan Aydin, Melih Akinci, Baki Hekimoglu
Aim. The aim was to evaluate the clinical Alvarado scoring system and computed tomography (CT) criteria for the diagnosis of acute appendicitis. Material and Methods. 117 patients with acute abdominal pain who underwent abdominal CT were enrolled in this retrospective study. Patient demographics, clinical Alvarado scoring, CT images, and pathologic results of the patients were evaluated. Results. 39 of the 53 patients who were operated on had pathologically proven acute appendicitis. CT criteria of appendiceal diameter, presence of periappendiceal inflammation, fluid, appendicolith, and white blood cell (WBC) count were significantly correlated with the inflammation of the appendix...
2016: Radiology Research and Practice
Anna F Delgado, Markus Nilsson, Francesco Latini, Johanna Mårtensson, Maria Zetterling, Shala G Berntsson, Irina Alafuzoff, Jimmy Lätt, Elna-Marie Larsson
Background and Purpose. Low-grade gliomas show infiltrative growth in white matter tracts. Diffusion tensor tractography can noninvasively assess white matter tracts. The aim was to preoperatively assess tumor growth in white matter tracts using quantitative MR tractography (3T). The hypothesis was that suspected infiltrated tracts would have altered diffusional properties in infiltrated tract segments compared to noninfiltrated tracts. Materials and Methods. Forty-eight patients with suspected low-grade glioma were included after written informed consent and underwent preoperative diffusion tensor imaging in this prospective review-board approved study...
2016: Radiology Research and Practice
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