Read by QxMD icon Read

Medical image processing

Paolo Ciancarella, Fabio Fazzari, Valentina Montano, Marco Guglielmo, Gianluca Pontone
A 21 year old male with no relevant medical history presented to our Institution for further assessments of a right paracardiac mass founded on a chest X-ray. Chest computed tomography revealed a wide median defect of the diaphragm at the level of xiphoid process of the sternum, with the herniation of omental fat tissue in the mediastinum. Cardiac magnetic resonance confirmed the presence of a huge hernia originating from the foramen of Morgagni (sterno-costal hiatus), displacing the heart leftwards and posteriorly and compressing the right ventricle (RV), giving to it a tubular shape...
April 2018: Journal of the Saudi Heart Association
Linling Li, Erni Ji, Fei Tang, Yunhai Qiu, Xue Han, Shengli Zhang, Zhiguo Zhang, Haichen Yang
Numerous functional magnetic resonance imaging studies have been conducted to elucidate emotion processing of patients with bipolar disorder (BD), but due to different inclusion criteria used, especially for the history of medication use, the results for euthymic BD patients are inconsistent. For this reason, brain functional effects of psychopharmacological treatments on BD patients have been investigated by numerous fMRI studies, but there is no existing report for brain functional effects of different mood stabilizers...
June 16, 2018: Brain Imaging and Behavior
Pallab Datta, Ananya Barui, Yang Wu, Veli Ozbolat, Kazim K Moncal, Ibrahim T Ozbolat
An increasing demand for directed assembly of biomaterials has inspired the development of bioprinting, which facilitates the assembling of both cellular and acellular inks into well-arranged three-dimensional (3D) structures for tissue fabrication. Although great advances have been achieved in the recent decade, there still exist issues to be addressed. Herein, a review has been systematically performed to discuss the considerations in the entire procedure of bioprinting. Though bioprinting is advancing at a rapid pace, it is seen that the whole process of obtaining tissue constructs from this technique involves multiple-stages, cutting across various technology domains...
June 14, 2018: Biotechnology Advances
Caroline Constant, Isabelle Masseau, Marie Babkine, Sylvain Nichols, David Francoz, Gilles Fecteau, Emma Marchionatti, Helene Larde, Andre Desrochers
OBJECTIVES:  (1) To develop an evaluation grid to provide a systematic interpretation of calves' articular radiographs, (2) to describe radiographic lesions of septic arthritis in dairy calves less than 6 months of age, (3) to investigate potential associations between demographic data or synovial bacteriological culture results and radiographic lesions (4) to determine whether an association is present between radiographic lesions, their severity and the long-term outcome. METHODS:  Medical records of 54 calves less than 180 days old treated for septic arthritis between 2009 and 2014 with radiographic images performed in the first 2 days after admission were reviewed...
June 16, 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
Reid F Thompson, Gilmer Valdes, Clifton D Fuller, Colin M Carpenter, Olivier Morin, Sanjay Aneja, William D Lindsay, Hugo J W L Aerts, Barbara Agrimson, Curtiland Deville, Seth A Rosenthal, James B Yu, Charles R Thomas
Artificial intelligence (AI) is emerging as a technology with the power to transform established industries, and with applications from automated manufacturing to advertising and facial recognition to fully autonomous transportation. Advances in each of these domains have led some to call AI the "fourth" industrial revolution [1]. In healthcare, AI is emerging as both a productive and disruptive force across many disciplines. This is perhaps most evident in Diagnostic Radiology and Pathology, specialties largely built around the processing and complex interpretation of medical images, where the role of AI is increasingly seen as both a boon and a threat...
June 12, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
Jonathan D Allred, Jeremy Niedbala, Justin K Mikell, Dawn Owen, Kirk A Frey, Yuni K Dewaraja
BACKGROUND: A major toxicity concern in radioembolization therapy of hepatic malignancies is radiation-induced pneumonitis and sclerosis due to hepatopulmonary shunting of 90 Y microspheres. Currently, 99m Tc macroaggregated albumin (99m Tc-MAA) imaging is used to estimate the lung shunt fraction (LSF) prior to treatment. The aim of this study was to evaluate the accuracy/precision of LSF estimated from 99m Tc planar and SPECT/CT phantom imaging, and within this context, to compare the corresponding LSF and lung-absorbed dose values from 99m Tc-MAA patient studies...
June 15, 2018: EJNMMI Research
Feiwei Qin, Nannan Gao, Yong Peng, Zizhao Wu, Shuying Shen, Artur Grudtsin
BACKGROUND AND OBJECTIVE: Leukocyte classification and cytometry have wide applications in medical domain, previous researches usually exploit machine learning techniques to classify leukocytes automatically. However, constrained by the past development of machine learning techniques, for example, extracting distinctive features from raw microscopic images are difficult, the widely used SVM classifier only has relative few parameters to tune, these methods cannot efficiently handle fine-grained classification cases when the white blood cells have up to 40 categories...
August 2018: Computer Methods and Programs in Biomedicine
Horea Gozar, Zoltan Derzsi, Alexandru Chira, Örs Nagy, Theodora Benedek
RATIONALE: In clubfoot deformity, planning of corrective treatment requires a complex understanding of the foot anatomy, as well as of the geometry and distribution of altered mechanical forces acting at the level of the deformed foot. At the same time, treatment success depends largely on the selection of the most appropriate shape and angles of the customized orthesis developed for foot correction. Therefore, a complex assessment of the intensity and distribution of the mechanical forces at this site is mandatory prior to initiation of any corrective therapy...
June 2018: Medicine (Baltimore)
A Shankar, J Krebs, D R Bednarek, S Rudin
The spectroscopic capabilities of a newly upgraded version of a prototype imaging photon counting detector (PCD) was investigated. The XCounter Actaeon has four acquisition modes in which signal processing is varied including one mode having a charge sharing correction so that neighboring pixels that share a detected event will not be erroneously counted twice, hence it is designated the Anti-Coincidence Circuit On or ACC On mode. Since this CdTe-based direct conversion PCD has 100 μm pixels, such charge sharing may frequently occur for typical medical x-ray energies...
February 2018: Proceedings of SPIE
Michael E Osadebey, Marius Pedersen, Douglas L Arnold, Katrina E Wendel-Mitoraj
BACKGROUND: Rician noise, bias fields and blur are the common distortions that degrade MRI images during acquisition. Blur is unique in comparison to Rician noise and bias fields because it can be introduced into an image beyond the acquisition stage such as postacquisition processing and the manifestation of pathological conditions. Most current blur assessment algorithms are designed and validated on consumer electronics such as television, video and mobile appliances. The few algorithms dedicated to medical images either requires a reference image or incorporate manual approach...
June 13, 2018: Biomedical Engineering Online
Shunxing Bao, Yuankai Huo, Prasanna Parvathaneni, Andrew J Plassard, Camilo Bermudez, Yuang Yao, Ilwoo Lyu, Aniruddha Gokhale, Bennett A Landman
When processing large medical imaging studies, adopting high performance grid computing resources rapidly becomes important. We recently presented a "medical image processing-as-a-service" grid framework that offers promise in utilizing the Apache Hadoop ecosystem and HBase for data colocation by moving computation close to medical image storage. However, the framework has not yet proven to be easy to use in a heterogeneous hardware environment. Furthermore, the system has not yet validated when considering variety of multi-level analysis in medical imaging...
March 2018: Proceedings of SPIE
Shikha Chaganti, Bennett A Landman
Image registration involves identification of a transformation to fit a target image to a reference image space. The success of the registration process is vital for correct interpretation of the results of many medical image-processing applications, including multi-atlas segmentation. While there are several validation metrics employed in rigid registration to examine the accuracy of the method, non-rigid registrations (NRR) are validated subjectively in most cases, validated in offline cases, or based on image similarity metrics, all of which have been shown to poorly correlate with true registration quality...
March 2018: Proceedings of SPIE
Teemu Mäntylä, Lauri Nummenmaa, Eva Rikandi, Maija Lindgren, Tuula Kieseppä, Riitta Hari, Jaana Suvisaari, Tuukka T Raij
BACKGROUND: Functional magnetic resonance imaging studies of psychotic disorders have reported both hypoactivity and hyperactivity in numerous brain regions. In line with the dysconnection hypothesis, these regions include cortical integrative hub regions. However, most earlier studies focused on a single cognitive function at a time, assessed by delivering artificial stimuli to patients with chronic psychosis. Thus, it remains unresolved whether these findings are present already in early psychosis and whether they translate to real-life-like conditions that require multisensory processing and integration...
May 3, 2018: Biological Psychiatry
Kujtim Latifi, Jimmy Caudell, Geoffrey Zhang, Dylan Hunt, Eduardo G Moros, Vladimir Feygelman
The AAPM TG 132 Report enumerates important steps for validation of the medical image registration process. While the Report outlines the general goals and criteria for the tests, specific implementation may be obscure to the wider clinical audience. We endeavored to provide a detailed step-by-step description of the quantitative tests' execution, applied as an example to a commercial software package (Mirada Medical, Oxford, UK), while striving for simplicity and utilization of readily available software. We demonstrated how the rigid registration data could be easily extracted from the DICOM registration object and used, following some simple matrix math, to quantify accuracy of rigid translations and rotations...
June 7, 2018: Journal of Applied Clinical Medical Physics
A Shankar, J Krebs, D R Bednarek, S Rudin
The prospect of improved low noise, high speed, and dual-energy imaging that may be associated with the use of photon-counting imaging detectors (PCD) has motivated this evaluation of a newly upgraded version of a prototype PCD. The XCounter Actaeon was evaluated in its four acquisition modes each based upon varying signal processing firmware including a mode with charge sharing correction that enables neighboring pixels that share the energy from one incident x-ray photon detection to be counted only once at the proper summed energy in the pixel with the largest charge deposition...
February 2018: Proceedings of SPIE
Tiantian Ye, Xuepei Huang, Yu Xia, Li Ma, Liang Wang, Xingjian Lai, He Liu, Bo Zhang, Ke Lv, Li Huo, Ya Hu, Quan Liao, Yuxin Jiang
The aim of this article is to explore the value of ultrasonic diagnosis and localization of intrathyroid parathyroid diseases.The medical records of 15 patients with surgically confirmed intrathyroid parathyroid diseases were reviewed. We analyzed the diagnosis process and recorded sonographic features of these intrathyroid parathyroid lesions.The patients included 11 females (73%, 11/15) and 4 males (27%, 4/15) with a mean age of 46.2 ± 10.2 years and a mean lesion size of 2.1 ± 1.1 cm. A total of 11 intrathyroid parathyroid lesions in this study presented as hypoechoic (73...
June 2018: Medicine (Baltimore)
Ales Prochazka, Hana Charvatova, Saeed Vaseghi, Oldrich Vysata
Multimodal signal analysis based on sophisticated noninvasive sensors, efficient communication systems, and machine learning, have a rapidly increasing range of different applications. The present paper is devoted to pattern recognition and the analysis of physiological data acquired by heart rate and thermal camera sensors during rehabilitation. A total number of 56 experimental data sets, each 40 min long, of the heart rate and breathing temperature recorded on an exercise bike have been processed to determine the fitness level and possible medical disorders...
June 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
Shin-Ting Wu, Raphael Voltoline, Wallace Loos, Jose Angel Ivan Rubianes Silva, Lionis Watanabe, Barbara Amorim, Ana Coan, Fernando Cendes, Clarissa L Yasuda
Focal cortical dysplasia (FCD) is a malformation of cortical development and a common cause of pharmacoresistant epilepsy. Resective surgery of clear-cut lesions may be curative. However, the localization of the seizure focus and the evaluation of its spatial extent can be challenging in many situations. For concordance assessment, medical studies show the relevance of accurate correlation of multisource imaging sequences. to improve the sensitivity and specificity of the evaluation. In this paper, we share the process we went through to reach our simple, but effective, solution for integrating multi-volume rendering into an exploratory visualization environment for the diagnosis of FCD...
May 2018: IEEE Computer Graphics and Applications
Xiaoyan Chen, Zhiye Chen, Zhao Dong, Mengqi Liu, Shengyuan Yu
Objective To investigate brain morphometric changes in medication-overuse headache with excessive intake of caffeine-containing combination analgesics. Materials and methods We recruited 32 medication-overuse headache patients overusing caffeine-containing combination analgesics and 26 normal controls with matched sex and age. Magnetic resonance T1-weighted images were processed by automatic volume algorithm of brain regions over the whole brain according to the neuromorphometrics template. We explored the volume differences between groups and correlation with clinical variables...
January 2018: Molecular Pain
Luca Maria Sconfienza, Domenico Albano, Georgina Allen, Alberto Bazzocchi, Bianca Bignotti, Vito Chianca, Fernando Facal de Castro, Elena E Drakonaki, Elena Gallardo, Jan Gielen, Andrea Sabine Klauser, Carlo Martinoli, Giovanni Mauri, Eugene McNally, Carmelo Messina, Rebeca Mirón Mombiela, Davide Orlandi, Athena Plagou, Magdalena Posadzy, Rosa de la Puente, Monique Reijnierse, Federica Rossi, Saulius Rutkauskas, Ziga Snoj, Jelena Vucetic, David Wilson, Alberto Stefano Tagliafico
OBJECTIVES: To update the 2012 European Society of Musculoskeletal Radiology (ESSR) clinical consensus guidelines for musculoskeletal ultrasound referral in Europe. METHODS: Twenty-one musculoskeletal imaging experts from the ESSR participated in a consensus study based on a Delphic process. Two independent (non-voting) authors facilitated the procedure and resolved doubtful issues. Updated musculoskeletal ultrasound literature up to July 2017 was scored for shoulder, elbow, wrist/hand, hip, knee, and ankle/foot...
June 6, 2018: European Radiology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"