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Menikou Georgios G City University, London, - - 2014
Develop a magnetic resonance imaging (MRI) compatible head phantom with acoustic attenuation closely matched to the human attenuation, and suitable for testing focused ultrasound surgery protocols. Images from an adult brain CT scan were used to segment the skull bone from adjacent cerebral tissue. The segmented model was manufactured in ...
Tsukabe Akio A Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan, - - 2014
The computed tomography angiography (CTA) spot sign correlates with intracerebral hemorrhage (ICH) expansion; however, various diagnostic performances for hematoma expansion, especially in sensitivity, have been reported. We aimed to assess the impact of scan timing of CTA on the diagnostic performance of the CTA spot sign for ICH expansion in ...
Wakao Norimitsu - - 2013
Study Design. Observational study using a retrospective single institute database.Objective. To investigate the variance of the VA V2 segment and the anatomical features of the C7 pedicle with or without VA entry based on CT angiography in 919 consecutive Japanese subjects.Summary of Background Data. Generally, the level of the VA ...
Shatla Emad Sadek - - 2013
Ultrasonographic (US) evaluation of spinal anomalies is limited. MRI is increasingly being used in the diagnosis of spinal anomalies. MRI has been able to show clearly the detailed anatomy of this rare case of type II diastematomyelia with triple splitting of the cord.
Ding Yuqin - - 2013
Mesoblastic nephroma (MN) presenting in an adult is extremely rare. The computed tomography (CT) and magnetic resonance imaging (MRI) features of this tumor in adulthood have not been widely reported. We present two additional cases of adult MN and describe the multiphasic contrast-enhanced CT and MRI findings.
Schwendener Nicole - - 2012
We present postmortem computed tomography (pmCT) as well as postmortem magnetic resonance (pmMR) imaging findings in a case of type II DeBakey aortic dissection with a complete rupture of the ascending aorta compared to the findings obtained at forensic autopsy. PmCT only allowed a presumptive diagnosis of aortic dissection based ...
Daoust A - - 2012
Manganese enhanced MRI (MEMRI) offers many possibilities such as tract tracing and functional imaging in vivo. Mn is however neurotoxic and may induce symptoms similar to those associated with Parkinson's disease (manganism). The mechanisms of Mn-induced neurotoxicity are not clear. In this study, we combine synchrotron X-ray fluorescence microprobe (SR-XRF) ...
Shazeeb Mohammed S - - 2012
Bis-phenylamides and bis-hydroxyindolamides of diethylenetriaminepentaacetic acid-gadolinium (DTPA(Gd)) are paramagnetic reducing substrates of peroxidases that enable molecular imaging of peroxidase activity in vivo. Specifically, gadolinium chelates of bis-5-hydroxytryptamide-DTPA (bis-5HT-DTPA(Gd)) have been used to image localized inflammation in animal models by detecting neutrophil-derived myeloperoxidase (MPO) activity at the inflammation site. However, in ...
Berardelli Rita - - 2012
This clinical review will summarize the available data regarding the role of mineralocorticoid receptors (MRs) on the hypothalamus-pituitary-adrenal (HPA) axis control in physiological and pathological conditions and in the memory processes involved in the control and appraisal of a stress event. MRs are predominantly expressed in the limbic structures, with ...
Basu Priyoneel - - 2012
We report that L: -5-hydroxytryptophan (5-HTP), a serotonin precursor, resets the overt circadian rhythm in the Indian pygmy field mouse, Mus terricolor, in a phase- and dose-dependent manner. We used wheel running to assess phase shifts in the free-running locomotor activity rhythm. Following entrainment to a 12:12 h light-dark cycle, 5-HTP ...
Verstraeten Tom R G M - - 2012
BACKGROUND: Reconstruction of the native plane in biconcave eroded glenoids is difficult. Nevertheless, accurate reconstruction of this plane is imperative for successful total shoulder arthroplasty. This study aims to determine guidelines that can increase the accuracy of glenoid component positioning. METHODS: Three different circular planes were determined on 3-dimensional computed ...
Choo Hye Jung - - 2012
Purpose:To determine the accuracy of a three-dimensional (3D) isotropic T1-weighted fast spin-echo (FSE) magnetic resonance (MR) sequence as compared with a conventional two-dimensional (2D) sequence in the diagnosis of rotator cuff tears and labral lesions.Materials and Methods:Institutional review board approval was obtained, and the informed consent requirement was waived. Forty-nine ...
Hossain Murshed - - 2012
PURPOSE: Magnetic resonance stereoscopic imaging (MRSI) of the prostate is an emerging technique that may enhance targeting and assessment in radiotherapy. Current practices in radiotherapy invariably involve image guidance. Gold seed fiducial markers are often used to perform daily prostate localization. If MRSI is to be used in targeting prostate ...
Acri G - - 2012
PURPOSE: The efficient use of computed tomography (CT) and magnetic resonance imaging (MRI) equipment necessitates establishing adequate quality-control (QC) procedures. In particular, the accuracy of slice thickness (ST) requires scan exploration of phantoms containing test objects (plane, cone or spiral). To simplify such procedures, a novel phantom and a computerised ...
Eisner Eric A - - 2012
: Shoulder instability is not uncommon in the adolescent athlete, and yet the ability for either clinical examination or magnetic resonance imaging (MRI) with arthrogram to accurately detect pathology in this younger population has not been elucidated yet. This study was performed to characterize the ability of physical examination and ...
Acer Niyazi - - 2012
Pineal gland is a very important neuroendocrine organ with many physiological functions such as regulating circadian rhythm. Radiologically, the pineal gland volume is clinically important because it is usually difficult to distinguish small pineal tumors via magnetic resonance imaging (MRI). Although many studies have estimated the pineal gland volume using ...
Matsuda Izuru - - 2011
PURPOSE: To compare dual-energy computed tomography (CT) spectral imaging and conventional CT imaging in terms of precision of the measurement of CT numbers in phantoms. MATERIALS AND METHODS: A circular phantom (CP) and an elliptical phantom (EP) were used. Capsules filled with iodine contrast media solutions at various concentration levels ...
Denard Patrick J - - 2011
Tears of the subscapularis were previously believed to be rare, but are now recognized to be very common. As maintenance of the subscapularis footprint is integral to normal biomechanical function of the shoulder it is important for the shoulder surgeon to be adept at recognizing and treating these tears. A ...
Cho Gene Y - - 2011
Although there have been many advancements in cancer research, much is still unknown about the heterogeneous tumor microenvironment. Diffusion-weighted MRI has proven to be a viable and versatile microstructural probe. Diffusion-weighted sequences specifically sensitive to intravoxel incoherent motion (IVIM) have seen a recent resurgence of interest as they promise to ...
Borjian Abolhasan - - 2012
Xanthogranulomatous osteomyelitis is a rare type of inflammatory process which is characterized by composition of immune cell aggregation on histological studies. Delayed-type hypersensitivity reaction of cell-mediated immunity may be implicated in its pathogenesis. Gross and radiological examination can mimic malignancy, and differentiation should be confirmed by histopathological evaluation. We describe ...
Parikh Shital N - - 2011
An 18-year-old woman presented with a history of recurrent glenohumeral dislocations involving her right dominant shoulder. Physical examination suggested physiologic hyperlaxity and anterior instability. Magnetic resonance arthrography demonstrated an anomalous intracapsular origin of the long head of the biceps tendon (LHBT), with normal-appearing LHBT in the intertubercular groove. Diagnostic arthroscopy ...
Igarashi Hironaka - - 2011
Proton magnetic resonance spectroscopy ((1)H-MRS) non-invasively provides in vivo biochemical information on tissue metabolites. In acute stage of cerebral ischemia, N-acetyl aspartate (NAA), one of (1)H-MRS observable metabolite, declines gradually reflecting energy impairment due to oxygen depletion. In our study, decline of NAA in ischemic core linearly correlated with the ...
Ikemoto Yusuke - - 2011
Purpose: A 3.0-T MRI phantom having human-tissue-equivalent relaxation times was developed.Methods: The ingredients of the phantom are carrageenan (for gelatinization), GdCl(3) (as a T(1)-relaxation modifier), agarose (as a T(2)-relaxation modifier), and NaN(3) (as an antiseptic agent). Numerous samples with varying concentrations of GdCl(3) and agarose were prepared, and T(1) and ...
Gulotta Lawrence V - - 2011
BACKGROUND: Reverse total shoulder arthroplasty offers pain relief and functional improvement for patients with rotator cuff-deficient shoulders. The purpose of this study was to determine the optimal amount of humeral retroversion for this prosthesis. MATERIALS AND METHODS: Six cadaveric shoulders underwent computed tomography (CT) imaging and were then dissected of ...
Co Steven - - 2011
PURPOSE: The purpose of this study was to evaluate whether 3-dimensional (3D) volumetric acquisition of shoulder ultrasound (US) data for supraspinatus rotator cuff tears is as sensitive when compared with conventional 2-dimensional (2D) US and routine magnetic resonance imaging (MRI), and whether there is improved workroom time efficiency when using ...
Izadpanah Kaywan - - 2011
BACKGROUND: Anatomic reconstruction of the coracoclavicular ligaments for the treatment of acromioclavicular joint separations provides superior biomechanical stability compared with other procedures. Clavicular and coracoidal footprints of the conoid ligament (CL) and the trapezoid ligament (TL) are well described. So far, little is known about their kinematics and the changes ...
Buck Florian M - - 2011
Purpose:To characterize the position, shape, and orientation of the long biceps tendon (LBT) on transverse magnetic resonance (MR) images acquired in neutral position and in maximal external and internal rotation of the shoulder in asymptomatic volunteers.Materials and Methods:Informed consent was obtained from all volunteers for this institutional review board-approved study. ...
Chen Yun B - - 2011
To evaluate the clinical value of magnetic resonance whole-body diffusion-weighted imaging (WB-DWI) in the staging of uterine cervical carcinoma. Twenty-six patients with untreated uterine cervical carcinoma received preoperative conventional MR and WB-DWI scans. WB-DWI scans were also obtained in 30 healthy volunteers. Measurements of apparent diffusion coefficient (ADC) were made ...
Girish Gandikota - - 2011
OBJECTIVE: The purpose of this study was to examine the range and prevalence of asymp tomatic findings at sonography of the shoulder. MATERIALS AND METHODS: The study sample comprised 51 consecutively enrolled subjects who had no symptoms in either shoulder. Ultrasound of one shoulder per patient was performed by a ...
Garavaglia Guido - - 2011
With the advent of arthroscopic shoulder surgery the comprehension and description of rotator cuff tears have strongly evolved. Subscapularis tears are difficult to recognize and are underestimated. Our purpose is to report our observations concerning the relative frequency of subscapularis tears in patients undergoing arthroscopic rotator cuff repair and to ...
Chenevert Thomas L TL Department of Radiology, University of Michigan, Ann Arbor, Michigan, USA. - - 2011
To present the use of a quality control ice-water phantom for diffusion-weighted magnetic resonance imaging (DW-MRI). DW-MRI has emerged as an important cancer imaging biomarker candidate for diagnosis and early treatment response assessment. Validating imaging biomarkers through multicenter trials requires calibration and performance testing across sites. The phantom consisted of ...
Ichimiya H - - 2011
Background: Subcutaneous fat necrosis (SCFN) of the newborn is a rare condition that manifests within days after birth. The interscapular region, axillae and shoulders are the most commonly affected sites, corresponding to anatomic sites of brown adipose tissue (BAT) in newborns. Objective: We postulated a specific involvement of BAT in ...
Dogan Metin - - 2012
The relationship between glenoid version angle and rotator cuff pathology has been described. However, the effect of glenoid version angle on rotator cuff pathology is still unknown. The aim of this study was to investigate whether there is an impact of glenoid version angle on rotator cuff pathology. All shoulder ...
Hong Edmund D - - 2011
The objective of this study was to examine the prevalence of incidental shoulder enchondromas on routine magnetic resonance (MR) shoulder imaging. Consecutive routine shoulder MR examinations (N=477) performed for suspected internal derangement were reviewed for the presence of incidental enchondromas. Incidental enchondromas were detected on 2.1% of routine MR shoulder ...
Wise James N - - 2011
The shoulder joint is a complex array of muscles, tendons, and capsuloligamentous structures that has the greatest freedom of motion of any joint in the body. Acute (<2 weeks) shoulder pain can be attributable to structures related to the glenohumeral articulation and joint capsule, rotator cuff, acromioclavicular joint, and scapula. ...
Halma J J - - 2012
Differences between radiologists and orthopaedic surgeons in the interpretation of MR images of the shoulder joint are experienced in daily clinical practice. This study set out to evaluate the inter-observer agreement between radiologists and orthopaedic surgeons in assessing pathology on MR imaging of the shoulder joint. Also, we determined the ...
Bruegel Melanie - - 2011
Hepatic epithelioid hemangioendothelioma (EHE) is a rare vascular tumor with low- to intermediate-grade malignant potential. We describe cross-sectional imaging findings of pathologically confirmed EHE including preliminary observations on lesion characteristics and apparent diffusion coefficients (ADCs) at diffusion-weighted MR imaging (DWI). CT and MRI examinations in five patients were retrospectively reviewed. ...
Driscoll B - - 2011
Dynamic contrast enhanced CT (DCE-CT) studies with modeling of blood flow and tissue perfusion are becoming more prevalent in the clinic, with advances in wide volume CT scanners allowing the imaging of an entire organ with sub-second image frequency and sub-millimeter accuracy. Wide-spread implementation of perfusion DCE-CT, however, is pending ...
Hitachi Shin - - 2011
The aim of this study was to evaluate the feasibility of high-resolution magnetic resonance imaging (MRI) using a microscopy coil for the diagnosis of rotator cuff tears by comparing the method to conventional MRI and MRI arthrography. A total of 68 shoulders were prospectively studied using a 1.5-T MRI unit. ...
Cook Tessa S - - 2011
New developments in musculoskeletal magnetic resonance (MR) imaging, including improved spatial resolution and MR arthrography, have led to an increasing frequency in the performance of shoulder MR imaging. As a result, radiologists' understanding of the normal and variant anatomy of the shoulder visible on MR imaging has also become more ...
Poon Peter Channel - - 2011
BACKGROUND: Accurate placement of the glenoid prosthesis in shoulder arthroplasty is critical; precise glenoid prosthesis alignment being a key element to avoid poor fixation and early loosening. The current recognized 2-dimensional (2-D) method for measuring glenoid version may be irrelevant to the above, as it does not take into account ...
Chalian Majid - - 2011
The purpose of this study was to determine magnetic resonance imaging (MRI) findings relevant to synovial injury of the shoulder in patients with and without acute shoulder trauma. Three hundred and nine consecutive shoulder MRI studies (185-male, 124-female, 50 ± 15 years old) were retrospectively evaluated for findings suggestive of synovial injury including ...
Peng Xin-Gui - - 2011
We evaluated dual-echo Dixon in-phase and out-of-phase (IP-OP), chemical shift imaging (CSI), and (1)H MRS (hydrogen MR spectroscopy) in estimating fat content (FC) in phantoms and in livers of mice. Phantoms were made according to the volume percentage of fat ranging from 0% to 100%. The three MR methods were ...
Jacobson Jon A - - 2011
The accuracy of shoulder ultrasonography (US) is largely dependent on the US examination technique. It is essential that the individual performing the US examination has an understanding of pertinent anatomy, such as bone surface anatomy and tendon orientation. It is also important to be familiar with imaging pitfalls related to ...
Wu Vincent - - 2011
Traditional computed tomography (CT) units provide a maximum scan field-of-view (sFOV) diameter of 50 cm and a limited bore size, which cannot accommodate a large patient habitus or an extended simulation setup in radiation therapy (RT). Wide-bore CT scanners with increased bore size were developed to address these needs. Some ...
Polousky John D - - 2011
Although shoulder injuries in adolescents are relatively common, injuries to the rotator cuff are relatively rare and not well characterized in the literature. We review 2 cases of adolescent subscapularis tendon avulsions treated surgically. The 2 patients were high-level athletes, 1 is a baseball pitcher and the other is a ...
Hirschmann Michael T - - 2011
With the cases described, we strive to introduce single photon emission computerized tomography in combination with conventional computer tomography (SPECT/CT) to shoulder surgeons, illustrate the possible clinical value it may offer as new diagnostic radiologic modality, and discuss its limitations. SPECT/CT may facilitate the establishment of diagnosis, process of decision ...
De Wilde Lieven - - 2011
PURPOSE: The purpose of the study was to determine the normal three-dimensional relationship between the humeral and the glenoid plane of the individual patient. We measured the three-dimensional angle between the glenoid plane and the humeral plane (glenohumeral angle, °GH) and the angle between the plane of the scapula and ...
Riordan Alan J - - 2011
Development and evaluation of a realistic hybrid head phantom for the validation of quantitative CT brain perfusion methods. A combination, or hybrid, of CT images of an anthropomorphic head phantom together with clinically acquired MRI brain images was used to construct a dynamic hybrid head phantom. Essential CT imaging parameters ...
Melis Barbara - - 2011
OBJECTIVES: Although the teres minor has received little attention in the literature compared to the other musculotendinous units of the rotator cuff, it is an important component of shoulder function. Our purpose was to study the appearance of the teres minor muscle on CT and MRI images in various patterns ...
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