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BMC Medical Imaging

Giasemi Koutouzi, Behrooz Nasihatkton, Monika Danielak-Nowak, Henrik Leonhardt, Mårten Falkenberg, Fredrik Kahl
BACKGROUND: A crucial step in image fusion for intraoperative guidance during endovascular procedures is the registration of preoperative computed tomography angiography (CTA) with intraoperative Cone Beam CT (CBCT). Automatic tools for image registration facilitate the 3D image guidance workflow. However their performance is not always satisfactory. The aim of this study is to assess the accuracy of a new fully automatic, feature-based algorithm for 3D3D registration of CTA to CBCT. METHODS: The feature-based algorithm was tested on clinical image datasets from 14 patients undergoing complex endovascular aortic repair...
November 8, 2018: BMC Medical Imaging
Li-Da Chen, Fu-Shun Pan, Lu-Yao Zhou, Yu-Bo Liu, Jian-Yao Lv, Ming Xu, Xiao-Yan Xie, Ming-De Lu, Zhu Wang, Wei Wang
BACKGROUND: This prospective study is to evaluate the potential value of sonographic measurements in the flaccid penis for the screening of arteriogenic impotence. METHODS: A consecutive series of 260 Chinese males consulting for sexual dysfunction and 54 controls underwent sonographic examination. The sonographic parameters were correlated with the clinical gold standards, including the international index of erectile function (IIEF) and penile erectile hardness grading scale (EHGS)...
November 6, 2018: BMC Medical Imaging
Jakub Baran, Zhaolin Chen, Francesco Sforazzini, Nicholas Ferris, Sharna Jamadar, Ben Schmitt, David Faul, Nadim Jon Shah, Marian Cholewa, Gary F Egan
BACKGROUND: Attenuation correction is one of the most crucial correction factors for accurate PET data quantitation in hybrid PET/MR scanners, and computing accurate attenuation coefficient maps from MR brain acquisitions is challenging. Here, we develop a method for accurate bone and air segmentation using MR ultrashort echo time (UTE) images. METHODS: MR UTE images from simultaneous MR and PET imaging of five healthy volunteers was used to generate a whole head, bone and air template image for inclusion into an improved MR derived attenuation correction map, and applied to PET image data for quantitative analysis...
November 6, 2018: BMC Medical Imaging
Su Min Ha, Joo Hee Cha, Hee Jung Shin, Eun Young Chae, Woo Jung Choi, Hak Hee Kim, Ha-Yeon Oh
BACKGROUND: We investigated the radiologic and clinical findings of radial scar and complex sclerosing lesions, and evaluated the rate of pathologic upgrade and predicting factors. METHODS: From review of our institution's database from January 2006 to December 2012, we enrolled 82 radial scars/complex sclerosing lesions in 80 women; 51 by ultrasound guided core needle biopsy, 1 by mammography-guided stereotactic biopsy, and 38 by surgical excision. The initial biopsy pathology revealed that 53 lesions were without high risk lesions and 29 were with high risk lesions...
November 3, 2018: BMC Medical Imaging
Ko-Chin Chen, Alon Arad, Zan-Ming Song, David Croaker
BACKGROUND: Micro-CT holds promising potential for phenotyping and histological purposes. However, few have clarified the difference in the neuroimaging quality between ex vivo and in vivo micro-CT scanners. In addition, no direct comparison has been made between micro-CT scans and standard microscopy. Furthermore, while the efficacy of various stains for yielding soft-tissue contrast in CT scans have been compared in other studies for embryos, staining protocols for larger samples have yet to be clarified...
October 30, 2018: BMC Medical Imaging
Jamshid Sadiqi, Hidayatullah Hamidi
BACK GROUND: Lung agenesis is a rare congenital anomaly. The main etiology of the disease is unknown whereas genetic, iatrogenic and viral factors as well as vitamin A deficiency during early pregnancy may result in developmental failure of primitive lung bud causing unilateral pulmonary agenesis. Affected patients usually present with variable respiratory symptoms and recurrent chest infection at any age. Plain film demonstrates opaque unilateral lung while chest CT scan can definitely diagnosis the disease...
October 30, 2018: BMC Medical Imaging
Danielle M Moyé, Tarique Hussain, Rene M Botnar, Animesh Tandon, Gerald F Greil, Adrian K Dyer, Markus Henningsson
BACKGROUND: Dual-phase 3-dimensional whole-heart acquisition allows simultaneous imaging during systole and diastole. Respiratory navigator gating and tracking of the diaphragm is used with limited accuracy. Prolonged scan time is common, and navigation often fails in patients with erratic breathing. Image-navigation (iNAV) tracks movement of the heart itself and is feasible in single phase whole heart imaging. To evaluate its diagnostic ability in congenital heart disease, we sought to apply iNAV to dual-phase sequencing...
October 16, 2018: BMC Medical Imaging
Fei Li, Zhe Wang, Guoxiang Qu, Diping Song, Ye Yuan, Yang Xu, Kai Gao, Guangwei Luo, Zegu Xiao, Dennis S C Lam, Hua Zhong, Yu Qiao, Xiulan Zhang
BACKGROUND: To develop a deep neural network able to differentiate glaucoma from non-glaucoma visual fields based on visual filed (VF) test results, we collected VF tests from 3 different ophthalmic centers in mainland China. METHODS: Visual fields obtained by both Humphrey 30-2 and 24-2 tests were collected. Reliability criteria were established as fixation losses less than 2/13, false positive and false negative rates of less than 15%. RESULTS: We split a total of 4012 PD images from 1352 patients into two sets, 3712 for training and another 300 for validation...
October 4, 2018: BMC Medical Imaging
Tae Joo Jeon, Sungjun Kim, Jinyoung Park, Jung Hyun Park, Eugene Y Roh
BACKGROUND: There are no objective and accurate rating tools for permanent impairment of traumatized ankles. The purpose of this study is to assess the role of 18F-Sodium fluoride (18F-NaF) positron emission tomography-computed tomography (PET/CT) bone scans in evaluating patients with limited ankle range of motion (ROM) after trauma. METHODS: 18F-NaF PET/CT was performed in 121 patients (75 men, 46 women; mean age: 45.8) who had ROM < 70% of normal after trauma affecting ankles...
September 20, 2018: BMC Medical Imaging
Maliheh Kadivar, Ziba Mosayebi, Reza Shervin Badoo, Raziyeh Sangesari, Saeed Jedari Attari, Maryam Saeedi, Elahe Movahedi Moghadam
BACKGROUND: Neonate patients with metabolic disorder show encephalopathy and seizures that may lead to morbidity and mortality. Thus rapid detection and treatment of these patients is necessary. Although Amplitude-integrated electroencephalography (aEEG) has been used for more than a decade in the evaluation of infants with encephalopathy but has not been used in the assessment of neonates suffering from metabolic disorders. In this study, we tried to determine the efficacy of aEEG as an easily available diagnostic tool in the diagnosis of neonates with metabolic diseases...
September 20, 2018: BMC Medical Imaging
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
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
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
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
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
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
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
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
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
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
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