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https://www.readbyqxmd.com/read/29140113/prediction-of-pancreatic-neuroendocrine-tumor-grade-based-on-ct-features-and-texture-analysis
#1
Rodrigo Canellas, Kristine S Burk, Anushri Parakh, Dushyant V Sahani
OBJECTIVE: The purposes of this study were to assess whether CT texture analysis and CT features are predictive of pancreatic neuroendocrine tumor (PNET) grade based on the World Health Organization (WHO) classification and to identify features related to disease progression after surgery. MATERIALS AND METHODS: Preoperative contrast-enhanced CT images of 101 patients with PNETs were assessed. The images were evaluated for tumor location, tumor size, tumor pattern, predominantly solid or cystic composition, presence of calcification, presence of heterogeneous enhancement on contrast-enhanced images, presence of pancreatic duct dilatation, presence of pancreatic atrophy, presence of vascular involvement by the tumor, and presence of lymphadenopathy...
November 15, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29138942/calculation-of-left-ventricular-volumes-and-ejection-fraction-from-dynamic-cardiac-gated-15-o-water-pet-ct-5d-pet
#2
Jonny Nordström, Tanja Kero, Hendrik Johannes Harms, Charles Widström, Frank A Flachskampf, Jens Sörensen, Mark Lubberink
BACKGROUND: Quantitative measurement of myocardial blood flow (MBF) is of increasing interest in the clinical assessment of patients with suspected coronary artery disease (CAD). (15)O-water positron emission tomography (PET) is considered the gold standard for non-invasive MBF measurements. However, calculation of left ventricular (LV) volumes and ejection fraction (EF) is not possible from standard (15)O-water uptake images. The purpose of the present work was to investigate the possibility of calculating LV volumes and LVEF from cardiac-gated parametric blood volume (V B) (15)O-water images and from first pass (FP) images...
November 14, 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/29138880/morphological-classification-of-intraductal-papillary-neoplasm-of-the-bile-duct
#3
Shihong Ying, Mingliang Ying, Wenjie Liang, Zhaoming Wang, Qidong Wang, Feng Chen, Wenbo Xiao
OBJECTIVES: To investigate the morphological classification of intraductal papillary neoplasm of the bile duct (IPNB), as well as morphological differences between IPNB without mucin secretion (IPNB-NM) and IPNB with mucin secretion (IPMN-B). METHODS: Eighty-one patients with IPNB were retrospectively analysed. Imaging examinations included computed tomography (CT), magnetic resonance imaging (MRI), gadolinium-ethoxybenzyl-diethylenetriaminepentaacetic acid (Gd-EOB-DTPA)-enhanced MRI and positron emission tomography-computed tomography (PET-CT)...
November 14, 2017: European Radiology
https://www.readbyqxmd.com/read/29138506/diagnostic-performance-of-susceptibility-weighted-magnetic-resonance-imaging-for-the-detection-of-calcifications-a-systematic-review-and-meta-analysis
#4
Lisa C Adams, Keno Bressem, Sarah Maria Böker, Yi-Na Yvonne Bender, Dominik Nörenberg, Bernd Hamm, Marcus R Makowski
Since its introduction, susceptibility-weighted-magnetic resonance imaging (SW-MRI) has shown the potential to overcome the insensitivity of MRI to calcification. Previous studies reporting the diagnostic performance of SW-MRI and magnetic resonance imaging (MRI) for the detection of calcifications are inconsistent and based on single-institution designs. To our knowledge, this is the first meta-analysis on SW-MRI, determining the potential of SW-MRI to detect calcifications. Two independent investigators searched MEDLINE, EMBASE and Web of Science for eligible diagnostic accuracy studies, which were published until March 24, 2017 and investigated the accuracy of SW-MRI to detect calcifications, using computed tomography (CT) as a reference...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137613/preoperative-t-staging-using-ct-colonography-with-multiplanar-reconstruction-for-very-low-rectal-cancer
#5
Dai Shida, Gen Iinuma, Akira Komono, Hiroki Ochiai, Shunsuke Tsukamoto, Mototaka Miyake, Yukihide Kanemitsu
BACKGROUND: Preoperative T staging of lower rectal cancer is an important criterion for selecting intersphincteric resection (ISR) or abdominoperineal resection (APR) as well as selecting neoadjuvant therapy. The aim of this study was to evaluate the accuracy of preoperative T staging using CT colonography (CTC) with multiplanar reconstruction (MPR), in which with the newest workstation the images can be analyzed with a slice thickness of 0.5 mm. METHODS: Between 2011 and 2013, 45 consecutive patients with very low rectal adenocarcinoma underwent CTC with MPR...
November 14, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29137612/comparison-of-semi-quantitative-and-quantitative-dynamic-contrast-enhanced-mri-evaluations-of-vertebral-marrow-perfusion-in-a-rat-osteoporosis-model
#6
Jingqi Zhu, Zuogang Xiong, Jiulong Zhang, Yuyou Qiu, Ting Hua, Guangyu Tang
BACKGROUND: This study aims to investigate the technical feasibility of semi-quantitative and quantitative dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in the assessment of longitudinal changes of marrow perfusion in a rat osteoporosis model, using bone mineral density (BMD) measured by micro-computed tomography (micro-CT) and histopathology as the gold standards. METHODS: Fifty rats were randomly assigned to the control group (n=25) and ovariectomy (OVX) group whose bilateral ovaries were excised (n=25)...
November 14, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29137072/volume-based-metabolic-parameter-of-breast-cancer-on-preoperative-18f-fdg-pet-ct-could-predict-axillary-lymph-node-metastasis
#7
Young-Sil An, Doo Kyoung Kang, Yongsik Jung, Tae Hee Kim
The purpose of our study was to evaluate the association between metabolic parameters on FDG PET/CT and axillary lymph node metastasis (ALNM) in patients with invasive breast cancer.From January 2012 to December 2012, we analyzed 173 patients with invasive ductal carcinoma (IDC) who underwent both initial breast magnetic resonance imaging (MRI) and F-fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) examinations. All metabolic parameters were measured from the tumor volume segmented by a gradient-based method...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29137032/non-hodgkin-lymphoma-of-multiple-extranodal-involvement-seen-on-mri-fdg-pet-ct-scans-a-case-report
#8
Shan Wang, Meng Meng, Qiuhu Wang, Kai Xu
RATIONALE: Anaplastic large cell lymphoma (ALCL) is a rare type of non-Hodgkin lymphoma (NHL). The most common extranodal sites of ALCL are skin, subcutaneous tissue, bone, lung, and gastrointestinal organs. This study reports a case of ALCL with multiple extranodal involvement, especially the whole body skeletal muscles, with the aim to share the imaging features of the ALCL including magnetic resonance imaging (MRI) and 18F-fluorodeoxyglucose positron emission tomography-computed tomography (18F-FDG PET-CT)...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29135471/first-patients-treated-with-a-1-5-t-mri-linac-clinical-proof-of-concept-of-a-high-precision-high-field-mri-guided-radiotherapy-treatment
#9
B W Raaymakers, I M Jürgenliemk-Schulz, G H Bol, M Glitzner, A N T J Kotte, B van Asselen, J C J de Boer, J J Bluemink, S L Hackett, M A Moerland, S J Woodings, J W H Wolthaus, H M van Zijp, M E P Philippens, R Tijssen, J G M Kok, E N de Groot-van Breugel, I Kiekebosch, L T C Meijers, C N Nomden, G G Sikkes, P A H Doornaert, W S C Eppinga, N Kasperts, L G W Kerkmeijer, J H A Tersteeg, K J Brown, B Pais, P Woodhead, J J W Lagendijk
The integration of 1.5 T MRI functionality with a radiotherapy linear accelerator (linac) has been pursued since 1999 by the UMC Utrecht in close collaboration with Elekta and Philips. The idea behind this integrated device is to offer unrivalled, online and real-time, soft-tissue visualization of the tumour and the surroundings for more precise radiation delivery. The proof of concept of this device was given in 2009 by demonstrating simultaneous irradiation and MR imaging on phantoms, since then the device has been further developed and commercialized by Elekta...
November 14, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29134565/prognostic-value-of-fdg-pet-and-dwi-in-breast-cancer
#10
Kazuhiro Kitajima, Yasuo Miyoshi, Toshiko Yamano, Soichi Odawara, Tomoko Higuchi, Koichiro Yamakado
OBJECTIVE: To investigate the prognostic value of preoperative FDG-PET/CT and diffusion weighted imaging (DWI) in patients with breast cancer. METHODS: A total of 73 patients with newly diagnosed invasive breast cancer who had undergone preoperative whole-body FDG-PET/CT and 3-Tesla breast MRI including DWI followed by surgery were identified. Effects of primary tumor PET parameters [maximum standardized uptake value (SUVmax), mean SUV (SUVmean), metabolic tumor volume (MTV), and total lesion glycolysis (TLG)] and DWI parameters [mean apparent diffusion coefficient (ADCmean) and minimum ADC (ADCmin)] including clinicopathologic factors on disease-free survival (DFS) were retrospectively evaluated using the log-rank and Cox methods...
November 13, 2017: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/29133822/a-non-smooth-tumor-margin-on-preoperative-imaging-assesses-microvascular-invasion-of-hepatocellular-carcinoma-a-systematic-review-and-meta-analysis
#11
HangTong Hu, Qiao Zheng, Yang Huang, Xiao Wen Huang, Zhi Cheng Lai, JingYa Liu, XiaoYan Xie, Shi Ting Feng, Wei Wang, Ming De Lu
Microvascular invasion (MVI) is rarely diagnosed preoperatively in hepatocellular carcinoma (HCC). The aim of this meta-analysis is to assess the diagnostic power of a non-smooth tumor margin on preoperative imaging for MVI. We performed a literature search using the PubMed, Embase and Cochrane Library databases, and 11 studies were included involving 618 MVI-positive cases and 1030 MVI-negative cases. Considerable heterogeneity was found, and was indicated to be attributable to the mean patient ages in the included studies...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133818/searching-for-prostate-cancer-by-fully-automated-magnetic-resonance-imaging-classification-deep-learning-versus-non-deep-learning
#12
Xinggang Wang, Wei Yang, Jeffrey Weinreb, Juan Han, Qiubai Li, Xiangchuang Kong, Yongluan Yan, Zan Ke, Bo Luo, Tao Liu, Liang Wang
Prostate cancer (PCa) is a major cause of death since ancient time documented in Egyptian Ptolemaic mummy imaging. PCa detection is critical to personalized medicine and varies considerably under an MRI scan. 172 patients with 2,602 morphologic images (axial 2D T2-weighted imaging) of the prostate were obtained. A deep learning with deep convolutional neural network (DCNN) and a non-deep learning with SIFT image feature and bag-of-word (BoW), a representative method for image recognition and analysis, were used to distinguish pathologically confirmed PCa patients from prostate benign conditions (BCs) patients with prostatitis or prostate benign hyperplasia (BPH)...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29133247/contrast-enhanced-ultrasound-identifies-hepatocellular-carcinoma-in-cirrhosis-a-large-multicenter-retrospective-study
#13
Eleonora Terzi, Massimo Iavarone, Maurizio Pompili, Letizia Veronese, Giuseppe Cabibbo, Mirella Fraquelli, Laura Riccardi, Ludovico De Bonis, Angelo Sangiovanni, Simona Leoni, Maria Assunta Zocco, Sandro Rossi, Nicola Alessi, Stephanie R Wilson, Fabio Piscaglia, Alessandro Granito, Veronica Salvatore, Francesco Tovoli, Matteo Angelo Manini, Gian Lodovico Rapaccini, Maria Elena Ainora, Valentina Ravetta, Giorgia Ghittoni, Agostino Ventra, Giuseppe Mogavero
BACKGROUND & AIMS: The use of contrast enhanced ultrasound (CEUS) for the diagnosis of hepatocellular carcinoma (HCC) in cirrhosis was questioned for the risk of false positive diagnosis in case of cholangiocarcinoma. The American College of Radiology has recently released a scheme (CEUS LI-RADS) classifying lesions at risk for HCC investigated by CEUS. Aim of the present study was to validate this LI-RADS scheme for the diagnosis of HCC. METHODS: A total of 1006 nodules in 848 patients with chronic liver disease at risk for HCC collected in 5 Italian centers were retrospectively analyzed...
November 10, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/29132998/waiting-for-radiology-test-results-patient%C3%A2-expectations-and-emotional-disutility
#14
Sean Woolen, Ella A Kazerooni, Amber Wall, Kelly Parent, Shannon Cahalan, Mitchell Alameddine, Matthew S Davenport
PURPOSE: To measure patient willingness to wait and emotional disutility of waiting for outpatient imaging test results. METHODS: A prospective HIPAA-compliant multicenter outpatient quality improvement survey was administered by a trained interviewer to 218 outpatients from November 1, 2016, to February 1, 2017. The survey was vetted by patient- and family-centered care advocates with experience in survey design and underwent precognitive testing for readability...
November 9, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29132054/contrast-enhanced-imaging-features-and-differentiation-of-benign-and-malignant-focal-splenic-lesions
#15
Fang Cao, Wei Qian, Yanqing Ma, Yinbo Wu, Jianguo Zhong
To assess the value of imaging features for differentiating malignant from benign focal splenic lesions, 79 pathologically proved cases with contrast-enhanced CT or MRI were retrospectively studied. The morphological characteristics were assessed and the enhancement patterns were classified into five categories. After multivariate logistic analysis, the lesion margin and enhancement patterns were significantly different between benign and malignant lesions. The combination of ill-defined margin and hypovascular enhancement for suggesting malignant lesions had a good specificity (94...
November 10, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/29131572/in-vivo-optical-detection-and-spectral-triangulation-of-carbon-nanotubes
#16
Ching-Wei Lin, Hailing Yang, Stephen R Sanchez, Weiqun Mao, Lan Pang, Kathleen Mary Beckingham, Robert C Bast, R Bruce Weisman
Biocompatible composites of single-walled carbon nanotubes in Matrigel have been surgically implanted into mouse ovaries and then noninvasively detected and located in the first in vivo demonstration of spectral triangulation. This optical method deduces the three-dimensional position of a short-wave IR emission source from the wavelength-dependent attenuation of fluorescence in tissues. Measurements were performed with a second-generation optical scanner that uses an LED matrix emitting at 736 nm for diffuse specimen excitation...
November 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29131073/an-introduction-to-contrast-enhanced-ultrasound-for-nephrologists
#17
Emily H Chang
Contrast-enhanced ultrasound (CEUS) is an emerging technology with no known nephrotoxicity. CEUS has been utilized in cardiac and abdominal imaging for decades in Asia and Europe and has recently received greater attention in the United States with its approval for characterization of indeterminate liver lesions. Emerging data suggest that CEUS has potential as a diagnostic imaging tool among individuals who have contraindications to CT and MRI. Few nephrologists are aware of CEUS and even fewer are aware of its potential applications among individuals with kidney disease...
November 9, 2017: Nephron
https://www.readbyqxmd.com/read/29130674/-efficacy-of-superior-rectus-and-lateral-rectus-muscle-belly-union-surgery-for-myopic-strabismus-fixus
#18
Guo-Yuan Yang, Long-Qian Liu
OBJECTIVE: To evaluate the effectiveness of superior rectus (SR) and lateral rectus (LR) union suture without scleral fixation for the treatment of myopic strabismus fixus. METHODS: A retrospective review was performed on 27 eyes of 16 patients who underwent lateral part of SR and superior part of LR muscle belly union between January 2010 and October 2015. We collected the ocular data including: best corrected visual acuity,axial length,CT or MRI images,orthoptic measurements (by prism test),and eye movements pre- and postoperatively...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29130010/spontaneous-bilateral-sternoclavicular-joint-septic-arthritis-and-lumbar-discitis-an-unusual-case-in-a-healthy-adult
#19
Georgios Mamarelis, Mohammad Zain Sohail, Athanasios Mamarelis, Hassan Fawi, Jehangir Mahaluxmivala
Introduction: Septic arthritis of the sternoclavicular (SC) joint is a rare condition. Typically, it presents in patients with risk of infection and is usually unilateral. In this report, we describe a case of spontaneous bilateral sternoclavicular joint infection of an otherwise healthy adult. Case Presentation: A 67-year-old man presented in our hospital complaining of 2-week history of neck and chest pain which was radiating to his shoulders bilaterally. Clinical examination revealed erythema and swelling of the sternoclavicular area...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/29129004/multiple-hereditary-osteochondromatosis-with-spinal-cord-compression-case-report
#20
Oscar García-González, J Nicolás Mireles-Cano, Natalia Sánchez-Zavala, Miguel A Chagolla-Santillan, Segio M Orozco-Ramirez, Pedro Silva-Cerecedo, Mario Murguia-Perez, Fernando Rueda-Franco
OBJECTIVE: The purpose of the report is to describe a patient with hereditary osteochondromatosis and spinal cord compression at the thoracic level. CLINICAL FEATURES: An 8-year-old patient with hereditary osteochondromatosis inherited from his father presented paraparesis in the left foot, leading to complete paralysis in both legs. INTERVENTION: In a CT scan, a bony tumor rising from the posterior wall of the T3 body narrowing the spinal canal, and the MRI spinal cord compression at the same level and the hydrosyringomyelic cavity extended to the conus medullaris; with an anterior thoracic approach to T2-T4, the fibro-cartilaginous tumor was removed, and the stabilization was completed with bone graft and a plate...
November 11, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
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