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BMC Medical Imaging

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https://www.readbyqxmd.com/read/30227848/3d-electroanatomical-mapping-is-less-sensitive-to-atrial-remodeling-in-estimation-of-true-left-atrial-volume-than-echocardiography
#1
Zdenka Fingrova, Josef Marek, Stepan Havranek, Lukas Lambert, Petr Kuchynka, Ales Linhart
BACKGROUND: Left atrial (LA) enlargement has been identified as a predictor of worse clinical outcome after catheter ablation for atrial fibrillation (AF). We investigated the correspondence of LA size parameters assessed by echocardiography, CT and 3D electroanatomical mapping in patients with AF treated by catheter ablation. METHODS: We analyzed echocardiographic LA volume measurements by disc summation method (LAVDISC ), computed tomography (LAVCT ) and 3D electroanatomical mapping (LAVCARTO ) in 100 pts...
September 18, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30223797/standardized-quality-metric-system-for-structural-brain-magnetic-resonance-images-in-multi-center-neuroimaging-study
#2
Michael E Osadebey, Marius Pedersen, Douglas L Arnold, Katrina E Wendel-Mitoraj, For The Alzheimer's Disease Neuroimaging Initiative
BACKGROUND: Multi-site neuroimaging offer several benefits and poses tough challenges in the drug development process. Although MRI protocol and clinical guidelines developed to address these challenges recommend the use of good quality images, reliable assessment of image quality is hampered by the several shortcomings of existing techniques. METHODS: Given a test image two feature images are extracted. They are grayscale and contrast feature images. Four binary images are generated by setting four different global thresholds on the feature images...
September 17, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30223791/desmoid-type-fibromatosis-mimicking-cystic-retroperitoneal-mass-case-report-and-literature-review
#3
Kyu-Chong Lee, Jongmee Lee, Baek Hui Kim, Kyeong Ah Kim, Cheol Min Park
BACKGROUND: Retroperitoneal desmoid-type fibromatosis (DF) is an uncommon mesenchymal neoplasm presenting as a firm mass with locally aggressive features. It usually manifests as a well-circumscribed or ill-defined, solid mass on cross-sectional imaging. Cystic changes of DF have been described in the literature in association with prolonged medical treatment or abscess formation. However, spontaneous cystic change is rarely reported. CASE PRESENTATION: Here we report the case of a 46-year-old patient with a DF mimicked a large cystic tumor in the retroperitoneum...
September 17, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30223786/apparent-diffusion-coefficient-as-an-effective-index-for-the-therapeutic-efficiency-of-brain-chemoradiotherapy-for-brain-metastases-from-lung-cancer
#4
Kai Liu, Zenglin Ma, Lili Feng
BACKGROUND: The potential of apparent diffusion coefficient (ADC) value alteration before and after chemoradiotherapy as a potential monitor for therapeutic efficiency of treatment for brain metastases from lung cancer were discussed. METHOD: Thirty lung cancer patients with brain metastases, conventional magnetic resonance imaging (MRI) examination and diffusion weighted imaging (DWI) were performed one week before chemoradiotherapy and after one treatment cycle and two treatment cycles...
September 17, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30219054/a-pilot-study-on-adjunctive-use-of-parametric-colour-coded-digital-subtraction-angiography-in-endovascular-interventions-of-haemodialysis-access
#5
Ru Yu Tan, Tze Tec Chong, Fu Chieh Tsai, Suh Chien Pang, Kian Guan Lee, Apoorva Gogna, Alicia Huiying Ong, Chieh Suai Tan
BACKGROUND: Two-dimensional digital subtraction angiography (DSA) is the gold standard for angiographic evaluation of dysfunctional haemodialysis access. We aim to investigate the utility of parametric colour coded DSA in providing hemodynamic analysis during haemodialysis access interventions. METHODS: We retrospectively studied 20 patients who underwent access intervention and applied parametric colour-coding on selected DSA acquisitions before and after percutaneous transluminal angioplasty (PTA)...
September 15, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30200900/malignancy-rates-of-b3-lesions-in-breast-magnetic-resonance-imaging-do-all-lesions-have-to-be-excised
#6
H Preibsch, L K Wanner, A Staebler, M Hahn, K C Siegmann-Luz
BACKGROUND: Approximately 10% of all MRI-guided vacuum-assisted breast biopsies (MR-VAB) are histologically classified as B3 lesions. In most of these cases surgical excision is recommended. The aim of our study was to evaluate the malignancy rates of different B3 lesions which are visible on MRI to allow a lesion-adapted recommendation of further procedure. METHODS: Retrospective analysis of 572 consecutive MR-VAB was performed. Inclusion criteria were a representative (=successful) MR-VAB, histologic diagnosis of a B3 lesion and either the existence of a definite histology after surgical excision or proof of stability or regression of the lesion on follow-up MRI...
September 10, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30189858/structural-and-functional-brain-changes-in-perimenopausal-women-who-are-susceptible-to-migraine-a-study-protocol-of-multi-modal-mri-trial
#7
Bo Hu, Xu Wang, Jie-Bing He, Yu-Jie Dai, Jin Zhang, Ying Yu, Qian Sun, Lin-FengYan, Yu-Chuan Hu, Hai-Yan Nan, Yang Yang, Alan D Kaye, Guang-Bin Cui, Wen Wang
BACKGROUND: As a common clinical symptom that often bothers midlife females, migraine is closely associated with perimenopause. Previous studies suggest that one of the most prominent triggers is the sudden decline of estrogen during perimenopausal period. Hormone replacement therapy (HRT) is widely used to prevent this suffering in perimenopausal women, but effective diagnostic system is lacked for quantifying the severity of the diseaase. To avoid the abuse and overuse of HRT, we propose to conduct a diagnostic trial using multimodal MRI techniques to quantify the severity of these perimenopausal migraineurs who are susceptible to the decline of estrogen...
September 6, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30180820/an-improved-nonlinear-diffusion-in-laplacian-pyramid-domain-for-cone-beam-ct-denoising-during-image-guided-vascular-intervention
#8
Yi Liu, Miguel Castro, Mathieu Lederlin, Adrien Kaladji, Pascal Haigron
BACKGROUND: Cone-beam computed tomography (CBCT) acquisition during endovascular aneurysm repair is an emergent technology with more and more applications. It may provide 3-D information to achieve guidance of intervention. However, there is growing concern on the overall radiation doses delivered to patients, thus a low dose protocol is called when scanning. But CBCT images with a low dose protocol are degraded, resulting in streak artifacts and decreased contrast-to-noise ratio (CNR)...
September 4, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30126352/significance-of-arterial-spin-labeling-perfusion-and-susceptibility-weighted-imaging-changes-in-patients-with-transient-ischemic-attack-a-prospective-cohort-study
#9
Inger Havsteen, Lasse Willer, Christian Ovesen, Janus Damm Nybing, Karen Ægidius, Jacob Marstrand, Per Meden, Sverre Rosenbaum, Marie Norsker Folke, Hanne Christensen, Anders Christensen
BACKGROUND: In a prospective cohort of patients with transient ischemic attack (TIA), we investigated usefulness and feasibility of arterial spin labeling (ASL) perfusion and susceptibility weighted imaging (SWI) alone and in combination with standard diffusion weighted (DWI) imaging in subacute diagnostic work-up. We investigated rates of ASL and SWI changes and their potential correlation to lasting infarction 8 weeks after ictus. METHODS: Patients with TIA underwent 3T-MRI including DWI, ASL and SWI within 72 h of symptom onset...
August 20, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30119645/an-improvement-of-carotid-intima-media-thickness-and-pulse-wave-velocity-in-renal-transplant-recipients
#10
Zhaojun Li, Yan Qin, Lianfang Du, Xianghong Luo
BACKGROUND: Renal transplantation can significantly improve the quality of life of patients with end stage renal disease (ESRD) who would otherwise require dialysis. Renal transplant (RT) recipients have higher risks of cardiovascular disease compared with general population. The carotid intima-media thickness (CIMT) and pulse wave velocity (PWV) have been used as the important predicting factor of vascular arteriosclerosis. Therefore, this study was to investigate the improvement of carotid intima-media thickness and pulse wave velocity in renal transplant recipients...
August 17, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30103678/incidental-finding-of-cardiac-hydatid-cysts-report-of-two-cases
#11
Dunya Moghul, Hidayatullah Hamidi
BACKGROUND: Hydatid is a parasitic infection which can affect any organ of body. In some organs like liver and lung; it can be found regularly while in other organs like heart, it is seen very rarely. Cardiac hydatid cysts comprise less than of 2% of hydatid infection cases and may be detected incidentally. CASE PRESENTATION: Authors report two cases of cardiac hydatid cysts in young adult patients living in rural areas of the country with positive animal contact...
August 13, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/30092765/the-same-modality-medical-image-registration-with-large-deformation-and-clinical-application-based-on-adaptive-diffeomorphic-multi-resolution-demons
#12
Chang Wang, Qiongqiong Ren, Xin Qin, Yi Yu
BACKGROUND: Diffeomorphic demons can not only guarantee smooth and reversible deformation, but also avoid unreasonable deformation. However, the number of iterations which has great influence on the registration result needs to be set manually. METHODS: This study proposed a novel method to exploit the adaptive diffeomorphic multi-resolution demons algorithm to the non-rigid registration of the same modality medical images with large deformation. Firstly an optimized non-rigid registration framework and the diffeomorphism strategy were used, and then a similarity energy function based on the grey value was designed as registration metric, lastly termination condition was set based on the variation of this metric and iterations can be stopped adaptively...
August 9, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29970014/structured-reporting-of-x-rays-for-atraumatic-shoulder-pain-advantages-over-free-text
#13
Franziska Schöppe, Wieland H Sommer, Florian Schmidutz, Dominik Pförringer, Marco Armbruster, Karolin J Paprottka, Jessica L V Plum, Bastian O Sabel, Felix G Meinel, Nora N Sommer
BACKGROUND: To analyse structured and free text reports of shoulder X-ray examinations evaluating the quality of reports and potential contributions to clinical decision-making. METHODS: We acquired both standard free text and structured reports of 31 patients with a painful shoulder without history of previous trauma who received X-ray exams. A template was created for the structured report based on the template ID 0000154 (Shoulder X-ray) from radreport.org using online software with clickable decision trees with concomitant generation of structured semantic reports...
July 3, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29914385/tonsillar-plasmacytoma-clues-on-magnetic-resonance-imaging
#14
İrfan Çelebi, Gülpembe Bozkurt, Nedim Polat
BACKGROUND: Malignant plasma cell proliferation may present as a disseminated disease (multiple myeloma), a solitary plasmacytoma of bone, or an extramedullary plasmacytoma of soft tissue. The latter plasmacytomas represent approximately 3% of all plasma cell proliferations, and 80% develop in the head-and-neck region. The unexpected clinical presentation of such masses may be present. CASE PRESENTATION: Here, we report a rare case of primary tonsillar plasmacytoma in a 42-year-old female...
June 18, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29788923/the-segmentation-of-bones-in-pelvic-ct-images-based-on-extraction-of-key-frames
#15
Hui Yu, Haijun Wang, Yao Shi, Ke Xu, Xuyao Yu, Yuzhen Cao
BACKGROUND: Bone segmentation is important in computed tomography (CT) imaging of the pelvis, which assists physicians in the early diagnosis of pelvic injury, in planning operations, and in evaluating the effects of surgical treatment. This study developed a new algorithm for the accurate, fast, and efficient segmentation of the pelvis. METHODS: The proposed method consists of two main parts: the extraction of key frames and the segmentation of pelvic CT images...
May 22, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29769079/a-consistency-evaluation-of-signal-to-noise-ratio-in-the-quality-assessment-of-human-brain-magnetic-resonance-images
#16
Shaode Yu, Guangzhe Dai, Zhaoyang Wang, Leida Li, Xinhua Wei, Yaoqin Xie
BACKGROUND: Quality assessment of medical images is highly related to the quality assurance, image interpretation and decision making. As to magnetic resonance (MR) images, signal-to-noise ratio (SNR) is routinely used as a quality indicator, while little knowledge is known of its consistency regarding different observers. METHODS: In total, 192, 88, 76 and 55 brain images are acquired using T2 * , T1 , T2 and contrast-enhanced T1 (T1 C) weighted MR imaging sequences, respectively...
May 16, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29769042/mpcad-a-multi-scale-radiomics-driven-framework-for-automated-prostate-cancer-localization-and-detection
#17
Farzad Khalvati, Junjie Zhang, Audrey G Chung, Mohammad Javad Shafiee, Alexander Wong, Masoom A Haider
BACKGROUND: Quantitative radiomic features provide a plethora of minable data extracted from multi-parametric magnetic resonance imaging (MP-MRI) which can be used for accurate detection and localization of prostate cancer. While most cancer detection algorithms utilize either voxel-based or region-based feature models, the complexity of prostate tumour phenotype in MP-MRI requires a more sophisticated framework to better leverage available data and exploit a priori knowledge in the field...
May 16, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29769030/in-silico-simulation-of-liver-crack-detection-using-ultrasonic-shear-wave-imaging
#18
Erwei Nie, Jiao Yu, Debaditya Dutta, Yanying Zhu
BACKGROUND: Liver trauma is an important source of morbidity and mortality worldwide. A timely detection and precise evaluation of traumatic liver injury and the bleeding site is necessary. There is a need to develop better imaging modalities of hepatic injuries to increase the sensitivity of ultrasonic imaging techniques for sites of hemorrhage caused by cracks. In this study, we conduct an in silico simulation of liver crack detection and delineation using an ultrasonic shear wave imaging (USWI) based method...
May 16, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29764411/contrast-enhanced-ultrasonography-of-the-pancreas-shows-impaired-perfusion-in-pancreas-insufficient-cystic-fibrosis-patients
#19
Trond Engjom, Kim Nylund, Friedemann Erchinger, Marcus Stangeland, Birger Norderud Lærum, Martin Mézl, Radovan Jiřík, Odd Helge Gilja, Georg Dimcevski
BACKGROUND: Perfusion assessment of the pancreas is challenging and poorly evaluated. Pancreatic affection is a prevalent feature of cystic fibrosis (CF). Little is known about pancreatic perfusion in CF. We aimed to assess pancreatic perfusion by contrast-enhanced ultrasound (CEUS) analysed in the bolus-and-burst model and software. METHODS: We performed contrast enhanced ultrasound of the pancreas in 25 CF patients and 20 healthy controls. Perfusion data was analysed using a dedicated perfusion model providing the mean capillary transit-time (MTT), blood flow (BF) and blood-volume (BV)...
May 15, 2018: BMC Medical Imaging
https://www.readbyqxmd.com/read/29764383/an-automated-algorithm-for-the-detection-of-cortical-interruptions-and-its-underlying-loss-of-trabecular-bone-a-reproducibility-study
#20
M Peters, J de Jong, A Scharmga, A van Tubergen, P Geusens, D Loeffen, R Weijers, S K Boyd, C Barnabe, K S Stok, B van Rietbergen, J van den Bergh
BACKGROUND: We developed a semi-automated algorithm that detects cortical interruptions in finger joints using high-resolution peripheral quantitative computed tomography (HR-pQCT), and extended it with trabecular void volume measurement. In this study we tested the reproducibility of the algorithm using scan/re-scan data. METHODS: Second and third metacarpophalangeal joints of 21 subjects (mean age 49 (SD 11) years, 17 early rheumatoid arthritis and 4 undifferentiated arthritis, all diagnosed < 1 year ago) were imaged twice by HR-pQCT on the same day with repositioning between scans...
May 15, 2018: BMC Medical Imaging
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