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Quantitative Imaging in Medicine and Surgery

journal
https://www.readbyqxmd.com/read/29312879/posterior-cortical-atrophy-the-value-of-neuroimaging-in-assessing-memory-loss
#1
Stefanos Ioannidis, Helam Roseman, Kenneth Chan, Stephane Duckett, Ruth Mizoguchi
No abstract text is available yet for this article.
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312878/case-based-approach-to-demonstrate-utility-of-cardiac-magnetic-resonance-imaging-mri-for-planning-biventricular-repair-with-inconclusive-echo-illustration-of-two-cases
#2
Supriya Gupta, Hanzhou Li, Jayanth H Keshavamurthy, Gyanendra K Sharma, Anastasios C Polimenakos
No abstract text is available yet for this article.
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312877/diagnostic-contribution-of-magnetic-resonance-imaging-in-an-atypical-presentation-of-motor-neuron-disease
#3
Lorenzo Ugga, Cinzia Coppola, Sirio Cocozza, Dario Saracino, Ferdinando Caranci, Francesco Tuccillo, Elisabetta Signoriello, Sara Casertano, Giuseppe Di Iorio, Enrico Tedeschi
Motor neuron disease (MND) is a neurodegenerative disease determining progressive and relentless motor deterioration involving both upper and lower motor neurons (UMN and LMN); several variants at onset are described. Here we describe a case of MND presenting as pure spastic monoparesis in which magnetic resonance imaging (MRI) gave a substantial contribution in confirming the diagnosis and assessing the severity of UMN involvement. An isolated pyramidal syndrome, with complete absence of LMN signs, is a rare phenotype in the context of MND (less than 4% of total cases), especially if restricted to only one limb...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312876/assessing-tissue-metabolism-by-phosphorous-31-magnetic-resonance-spectroscopy-and-imaging-a-methodology-review
#4
REVIEW
Yuchi Liu, Yuning Gu, Xin Yu
Many human diseases are caused by an imbalance between energy production and demand. Magnetic resonance spectroscopy (MRS) and magnetic resonance imaging (MRI) provide the unique opportunity for in vivo assessment of several fundamental events in tissue metabolism without the use of ionizing radiation. Of particular interest, phosphate metabolites that are involved in ATP generation and utilization can be quantified noninvasively by phosphorous-31 (31P) MRS/MRI. Furthermore, 31P magnetization transfer (MT) techniques allow in vivo measurement of metabolic fluxes via creatine kinase (CK) and ATP synthase...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312875/functional-dynamic-radiography-with-computer-analysis-for-physiological-chest-imaging-and-kinematic-joint-imaging
#5
Shigeru Sanada
We developed a functional digital radiography system that provides physiological and functional information of the chest and/or joints using an X-ray flat-panel detector (FPD) system. During chest examination, sequential chest radiographs are taken from inspiration to expiration in order to analyze diaphragmatic movements. Pixel value changes in localized areas of the lung are then assessed to analyze ventilation and circulation. For limb joints, such as the wrist, shoulder, and knee, sequential radiographs during flexion and extension or rotational movement are considered, and movement angles are analyzed...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312874/one-and-a-half-syndrome-with-its-spectrum-disorders
#6
Fang Xue, Lihong Zhang, Li Zhang, Zhenguang Ying, Ou Sha, Yan Ding
One-and-a-half syndrome is a syndrome characterized by horizontal movement disorders of the eyeballs, which was first reported and named by Fisher in 1967. It presents a combination of ipsilateral conjugate horizontal gaze palsy (one) and ipsilateral internuclear ophthalmoplegia (INO) (a half). On the basis of the one-and-a-half syndrome, there are a series of related rare syndromes called the one-and-a-half syndrome spectrum disorders. This article reviews rare cases of one-and-a-half syndrome spectrum disorder, describes the clinical and pathological features of different syndromes, and summarizes their nomenclature...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312873/left-ventricular-deformation-abnormalities-in-a-patient-with-calpainopathy-a-case-from-the-three-dimensional-speckle-tracking-echocardiographic-magyar-path-study
#7
Attila Nemes, Lívia Dézsi, Péter Domsik, Anita Kalapos, Tamás Forster, László Vécsei
Calpainopathy or limb-girdle muscular dystrophy type 2A (LGMD2A) is the most common type of autosomal recessive limb-girdle muscular dystrophies. The disease is caused by mutations in the CAPN3 gene encoding calpain, a protein involved in muscle membrane remodeling and repair. This paper gives an overview of the genetic background, clinical course, and diagnosis of the disease, and presents the first case of calpainopathy in which cardiac deformation mechanics was investigated. Three-dimensional speckle-tracking echocardiography (3DSTE) demonstrated reduced left ventricular (LV) strains and increased LV apical rotation and twist, suggestive of asymptomatic subclinical LV dysfunction...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312872/weight-bearing-cone-beam-ct-scan-versus-gravity-stress-radiography-for-analysis-of-supination-external-rotation-injuries-of-the-ankle
#8
John M Marzo, Melissa A Kluczynski, Corey Clyde, Mark J Anders, Christopher E Mutty, Christopher A Ritter
For AO 44-B2 ankle fractures of uncertain stability, the current diagnostic standard is to obtain a gravity stress radiograph, but some have advocated for the use of weight-bearing radiographs. The primary aim was to compare measures of medial clear space (MCS) on weight-bearing cone beam computed tomography (CBCT) scans versus gravity stress radiographs for determining the state of stability of ankle fractures classified as AO SER 44-B2 or Weber B. The secondary aim was to evaluate the details offered by CBCT scans with respect to other findings that may be relevant to patient care...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312871/patient-specific-three-dimensional-printing-for-pre-surgical-planning-in-hepatocellular-carcinoma-treatment
#9
Elizabeth Perica, Zhonghua Sun
Background: Recently, three-dimensional (3D) printing has shown great interest in medicine, and 3D printed models may be rendered as part of the pre-surgical planning process in order to better understand the complexities of an individual's anatomy. The aim of this study is to investigate the feasibility of utilising 3D printed liver models as clinical tools in pre-operative planning for resectable hepatocellular carcinoma (HCC) lesions. Methods: High-resolution contrast-enhanced computed tomography (CT) images were acquired and utilized to generate a patient-specific 3D printed liver model...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312870/robust-principal-component-analysis-in-optical-micro-angiography
#10
Nhan Le, Shaozhen Song, Qinqin Zhang, Ruikang K Wang
Background: Recent development of optical micro-angiography (OMAG) utilizes principal component analysis (PCA), where linear-regression filter is employed to separate static and blood flow signals within optical coherence tomography (OCT). While PCA is relatively simple and computationally efficient, the technique is sensitive to and easily skewed by outliers. In this paper, robust PCA (RPCA) is thus introduced to tackle this issue in traditional PCA. Methods: We first provide brief theoretical background of PCA and RPCA in the context of OMAG where coherent (complex) OCT signals are utilized to contrast blood flow...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312869/gastrointestinal-tract-involvement-in-acute-pancreatitis-initial-findings-and-follow-up-by-magnetic-resonance-imaging
#11
Yi-Fan Ji, Xiao-Ming Zhang, Don G Mitchell, Xing-Hui Li, Tian-Wu Chen, Yong Li, Zhi-Guo Bao, Wei Tang, Bo Xiao, Xiao-Hua Huang, Lin Yang
Background: To study the initial and follow up patterns of gastrointestinal tract involvement in acute pancreatitis (AP) using magnetic resonance imaging (MRI). Methods: A total of 209 patients with AP undergoing abdominal MRI on 1.5 T MRI were compared to 100 control patients selected from our daily clinical caseload who underwent MRI over the same recruitment period and had no other disease which can cause abnormality of gastrointestinal tract. Initial and follow up MRI examinations of gastrointestinal tract abnormalities were noted for AP patients...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312868/aortic-stiffness-is-increased-in-patients-with-hypereosinophilic-syndrome-being-in-early-necrotic-phase
#12
Attila Nemes, Imelda Marton, Péter Domsik, Anita Kalapos, Éva Pósfai, Szabolcs Modok, Zita Borbényi, Tamás Forster
Background: Persistent eosinophilia and eosinophil-mediated single- or multiple-organ damage are typical features of hypereosinophilic syndrome (HES). Theoretically, eosinophilic infiltration of the ascending aortic wall could not be excluded in HES, therefore the present study aimed to test whether HES is associated with abnormalities in aortic elastic properties. Methods: The present study comprised 10 HES patients (mean age: 57.6±10.1 years, 5 males) without known cardiovascular disease, their results were compared to 19 age-, gender- and risk factor-matched controls (59...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312867/quantitative-assessment-of-nonsolid-pulmonary-nodule-volume-with-computed-tomography-in-a-phantom-study
#13
Marios A Gavrielides, Benjamin P Berman, Mark Supanich, Kurt Schultz, Qin Li, Nicholas Petrick, Rongping Zeng, Jenifer Siegelman
Background: To assess the volumetric measurement of small (≤1 cm) nonsolid nodules with computed tomography (CT), focusing on the interaction of state of the art iterative reconstruction (IR) methods and dose with nodule densities, sizes, and shapes. Methods: Twelve synthetic nodules [5 and 10 mm in diameter, densities of -800, -630 and -10 Hounsfield units (HU), spherical and spiculated shapes] were scanned within an anthropomorphic phantom. Dose [computed tomography scan dose index (CTDIvol)] ranged from standard (4...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29312866/quantitative-texture-analysis-on-pre-treatment-computed-tomography-predicts-local-recurrence-in-stage-i-non-small-cell-lung-cancer-following-stereotactic-radiation-therapy
#14
Carole Dennie, Rebecca Thornhill, Carolina A Souza, Cecilia Odonkor, Jason R Pantarotto, Robert MacRae, Graham Cook
Background: The prediction of local recurrence (LR) of stage I non-small cell lung cancer (NSCLC) after definitive stereotactic body radiotherapy (SBRT) remains elusive. The purpose of this study was to assess whether quantitative imaging features on pre-treatment computed tomography (CT) can predict LR beyond 18 (18F) fluorodeoxyglucose (18F-FDG) positron emission tomography (PET)/CT maximum standard uptake value (SUVmax). Methods: This retrospective study evaluated 36 patients with 37 stage I NSCLC who had local tumor control (LC; n=19) and (LR; n=18)...
December 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184772/how-liver-pathologies-contribute-to-t1rho-contrast-require-more-careful-studies
#15
Yì Xiáng J Wáng, Weitian Chen, Min Deng
No abstract text is available yet for this article.
October 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184771/acute-myocardial-infarction-and-stroke-secondary-to-valve-thrombosis-following-transcatheter-aortic-valve-replacement-what-can-happen-when-antiplatelet-agents-are-stopped
#16
Mau Chu Lam, Gajen Kanaganayagam, Yousif Ahmad, Michael Fertleman, Ben Ariff
No abstract text is available yet for this article.
October 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184770/dentinogenic-ghost-cell-tumor-a-rare-case-report-with-review-of-literature
#17
Yash Agrawal, Giridhar S Naidu, Ramanpal Singh Makkad, Ravleen Nagi, Supreet Jain, Dilip R Gadewar, Raman Kataria
Dentinogenic ghost cell tumors (DGCT) are very rare tumors considered as solid variants of calcifying epithelial odontogenic cysts (CEOC). They are locally invasive neoplasms and their main characteristic features are ameloblastoma like odontogenic epithelial proliferation, an aberrant keratinization in the form of ghost cells and dysplastic dentin. DGCT occur as two forms intraosseous (central) and extra osseous (peripheral), of which more aggressive intraosseous variety requires careful monitoring and aggressive local resection to prevent recurrence...
October 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184769/diffuse-glioblastoma-resembling-acute-hemorrhagic-leukoencephalitis
#18
Carla Schettino, Ferdinando Caranci, Giacomo Lus, Elisabetta Signoriello, Marica Eoli, Elena Anghileri, Bianca Pollo, Mariarosa A B Melone, Giuseppe Di Iorio, Gaetano Finocchiaro, Lorenzo Ugga, Enrico Tedeschi
We report the case of a young man with sudden onset of diplopia after an upper respiratory tract infection. Based on the first radiological findings acute hemorrhagic leukoencephalitis, a variant of acute disseminated encephalomyelitis, was suspected and treatment with high dose intravenous dexamethasone was started but it was stopped for intolerance. The patient clinically worsened, developing gait instability, ataxia and ophthalmoplegia; brain MRI performed 20 days later showed severe progression of the disease with subependymal dissemination...
October 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184768/identifying-osteoporotic-vertebral-endplate-and-cortex-fractures
#19
REVIEW
Yì Xiáng J Wáng, Fernando Ruiz Santiago, Min Deng, Marcello H Nogueira-Barbosa
Osteoporosis is the most common metabolic bone disease, and vertebral fractures (VFs) are the most common osteoporotic fracture. A single atraumatic VF may lead to the diagnosis of osteoporosis. Prevalent VFs increase the risk of future vertebral and non-vertebral osteoporotic fracture independent of bone mineral density (BMD). The accurate and clear reporting of VF is essential to ensure patients with osteoporosis receive appropriate treatment. Radiologist has a vital role in the diagnosis of this disease...
October 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29184767/preliminary-results-of-vibro-acoustography-evaluation-of-bone-surface-and-bone-fracture
#20
Marcello H Nogueira-Barbosa, Hermes Arytto Salles Kamimura, Guilherme Braz, Paulo M Agnollitto, Antonio Adilton Oliveira Carneiro
Background: Vibro-acoustography (VA) uses two co-focused ultrasound beams with slightly different frequencies. The beams interact and generate a low-frequency focus to excite an object. Methods: A two-element confocal ultrasound transducer with central frequency at 3.2 MHz was used to generate the low-frequency excitation (30 kHz) and the response of the bone to that excitation was acquired by a dedicated hydrophone. The face of the confocal transducer was positioned parallel to the surface of the bone at a focal length of 7 cm...
October 2017: Quantitative Imaging in Medicine and Surgery
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