keyword
https://read.qxmd.com/read/38536580/impact-of-harmonization-on-the-reproducibility-of-mri-radiomic-features-when-using-different-scanners-acquisition-parameters-and-image-pre-processing-techniques-a-phantom-study
#1
JOURNAL ARTICLE
Ghasem Hajianfar, Seyyed Ali Hosseini, Sara Bagherieh, Mehrdad Oveisi, Isaac Shiri, Habib Zaidi
This study investigated the impact of ComBat harmonization on the reproducibility of radiomic features extracted from magnetic resonance images (MRI) acquired on different scanners, using various data acquisition parameters and multiple image pre-processing techniques using a dedicated MRI phantom. Four scanners were used to acquire an MRI of a nonanatomic phantom as part of the TCIA RIDER database. In fast spin-echo inversion recovery (IR) sequences, several inversion durations were employed, including 50, 100, 250, 500, 750, 1000, 1500, 2000, 2500, and 3000 ms...
March 27, 2024: Medical & Biological Engineering & Computing
https://read.qxmd.com/read/38529264/incorporating-a-priori-information-in-deep-learning-models-for-quantitative-susceptibility-mapping-via-adaptive-convolution
#2
JOURNAL ARTICLE
Simon Graf, Walter A Wohlgemuth, Andreas Deistung
Quantitative susceptibility mapping (QSM) has attracted considerable interest for tissue characterization (e.g., iron and calcium accumulation, myelination, venous vasculature) in the human brain and relies on extensive data processing of gradient-echo MRI phase images. While deep learning-based field-to-susceptibility inversion has shown great potential, the acquisition parameters applied in clinical settings such as image resolution or image orientation with respect to the magnetic field have not been fully accounted for...
2024: Frontiers in Neuroscience
https://read.qxmd.com/read/38527007/right-sinus-of-valsalva-aneurysm-rupturing-into-the-right-atrium-and-dissecting-into-the-interventricular-septum
#3
Xing-Zhao Liu, Yong Huang, Zhi-Li Chen
The right sinus of the Valsalva aneurysm (SVA) rupturing into the right atrium (RA) and dissecting into the interventricular septum (IVS) is rare. The disease can be definitively diagnosed using two-dimensional (2D) echocardiography and color Doppler ultrasonography. Real-time biplane imaging and three-dimensional (3D) echocardiography offer new perspectives for viewing and diagnosing this disease.
March 2024: Echocardiography
https://read.qxmd.com/read/38527004/standardization-and-validation-of-neolvot-assessment-using-three-dimensional-trans-esophageal-echocardiography-before-trans-catheter-mitral-valve-replacement
#4
JOURNAL ARTICLE
Soha Hekal, Amr Y Emam, Nagwa Thabet, Mahmoud Shaaban, Hesham Bahaa, Ahmed Elguindy, Hani Mahmoud-Elsayed
BACKGROUND: Trans-catheter mitral valve replacement (TMVR) procedures had emerged as an alternative solution for patients who are at high risk for mitral valve surgery. Although cardiac computed tomography (CT) remains the standard method for procedural planning, there is no full agreement on the best systolic phase for quantitation of the neoLVOT. Furthermore, a new three-dimensional trans-esophageal echocardiography (3DTEE) based software was developed to serve as filter and or an alternative for patients who cannot have CT due to any contraindication...
March 2024: Echocardiography
https://read.qxmd.com/read/38525680/3d-balanced-ssfp-ute-mri-for-multiple-contrasts-whole-brain-imaging
#5
JOURNAL ARTICLE
Xin Shen, Eduardo Caverzasi, Yang Yang, Xiaoxi Liu, Ari Green, Roland G Henry, Uzay Emir, Peder E Z Larson
PURPOSE: This study aimed to develop a new high-resolution MRI sequence for the imaging of the ultra-short transverse relaxation time (uT2 ) components in the brain, while simultaneously providing proton density (PD) contrast for reference and quantification. THEORY: The sequence combines low flip angle balanced SSFP (bSSFP) and UTE techniques, together with a 3D dual-echo rosette k-space trajectory for readout. METHODS: The expected image contrast was evaluated by simulations...
March 25, 2024: Magnetic Resonance in Medicine
https://read.qxmd.com/read/38525658/a-vendor-neutral-epi-sequence-for-hyperpolarized-13-c-mri
#6
JOURNAL ARTICLE
Tyler Blazey, Ashley Shaw, Cornelius von Morze
PURPOSE: To develop a flexible, vendor-neutral EPI sequence for hyperpolarized 13 C metabolic imaging. METHODS: An open-source EPI sequence consisting of a metabolite-specific spectral-spatial RF excitation pulse and a customizable EPI readout was created using the Pulseq framework. To explore the flexibility of our sequence, we tested several versions of the sequence including a symmetric 3D readout with different spatial resolutions for each metabolite (1.0 cm3 and 1...
March 25, 2024: Magnetic Resonance in Medicine
https://read.qxmd.com/read/38522488/quantification-of-mitral-regurgitation-in-mitral-valve-prolapse-by-3d-vena-contracta-area-derived-cut-off-values-and-comparison-with-2d-multiparametric-approach
#7
JOURNAL ARTICLE
Giorgio Fiore, Giacomo Ingallina, Francesco Ancona, Carlo Gaspardone, Federico Biondi, Davide Margonato, Michele Morosato, Martina Belli, Annamaria Tavernese, Stefano Stella, Eustachio Agricola
BACKGROUND: Echocardiographic grading of mitral regurgitation (MR) in mitral valve prolapse (MVP) is challenging. 3D vena contracta area (3D VCA) has been proposed as valuable method. However, data defining the cut-off values of severity and validation in the subset of patients with MVP are scarce. The aim of this study was to validate the 3D VCA by 3D transesophageal color-Doppler echocardiography (3D-TEE) in patients with MVP and to define the cut-off values of severity grading. The secondary aim was to compare 3D VCA to the EROA-PISA method...
March 22, 2024: Journal of the American Society of Echocardiography
https://read.qxmd.com/read/38522487/the-promise-and-pitfalls-of-3d-vena-contracta-for-mitral-regurgitation
#8
EDITORIAL
Shantel Brissett, Gerard P Aurigemma, Matthew W Parker
No abstract text is available yet for this article.
March 22, 2024: Journal of the American Society of Echocardiography
https://read.qxmd.com/read/38520716/evaluation-of-aortic-hemodynamics-using-four-dimensional-flow-of-magnetic-resonance-imaging-in-rabbits-with-liver-fibrosis
#9
JOURNAL ARTICLE
Jiali Li, Yuansheng Li, Xin Lin, Cheng Lv, Xiaoyong Zhang, Jing Chen
BACKGROUND: Liver fibrosis (LF) precipitates systemic hemodynamic alterations, however, its impact on the aorta remaining undefined. PURPOSE: To assess aorta hemodynamics changes during LF development in a rabbit model. STUDY TYPE: Prospective, experimental. ANIMAL MODEL: Thirty 7-month-old male rabbits underwent bile duct ligation (BDL) to induce LF. FIELD STRENGTH/SEQUENCE: Biweekly four-dimensional (4D) flow imaging incorporating a 3D gradient-echo at 3...
March 23, 2024: Journal of Magnetic Resonance Imaging: JMRI
https://read.qxmd.com/read/38519901/comparison-of-asl-and-dsc-perfusion-methods-in-the-evaluation-of-response-to-treatment-in-patients-with-a-history-of-treatment-for-malignant-brain-tumor
#10
JOURNAL ARTICLE
Ezgi Suat Bayraktar, Gokhan Duygulu, Yusuf Kenan Çetinoğlu, Mustafa Fazıl Gelal, Melda Apaydın, Hülya Ellidokuz
OBJECTIVE: Perfusion MRI is of great benefit in the post-treatment evaluation of brain tumors. Interestingly, dynamic susceptibility contrast-enhanced (DSC) perfusion has taken its place in routine examination for this purpose. The use of arterial spin labeling (ASL), a perfusion technique that does not require exogenous contrast material injection, has gained popularity in recent years. The aim of the study was to compare two different perfusion techniques, ASL and DSC, using qualitative and quantitative measurements and to investigate the diagnostic effectiveness of both...
March 22, 2024: BMC Medical Imaging
https://read.qxmd.com/read/38517610/deep-learning-based-3d-cerebrovascular-segmentation-workflow-on-bright-and-black-blood-sequences-magnetic-resonance-angiography
#11
JOURNAL ARTICLE
Langtao Zhou, Huiting Wu, Guanghua Luo, Hong Zhou
BACKGROUND: Cerebrovascular diseases have emerged as significant threats to human life and health. Effectively segmenting brain blood vessels has become a crucial scientific challenge. We aimed to develop a fully automated deep learning workflow that achieves accurate 3D segmentation of cerebral blood vessels by incorporating classic convolutional neural networks (CNNs) and transformer models. METHODS: We used a public cerebrovascular segmentation dataset (CSD) containing 45 volumes of 1...
March 22, 2024: Insights Into Imaging
https://read.qxmd.com/read/38516863/editing-of-3d-images-in-echocardiographic-evaluation-of-mitral-valve-is-there-any-correlation-with-photography
#12
JOURNAL ARTICLE
Sergio Suma
Editing of 3D raw images acquired during transesophageal echocardiography could be similar to the post processing of raw images with digital software used in photography. 3D image editing in echocardiography is often underestimated in clinical practice, and people are satisfied with the first 3D image they are able to obtain during transesophageal examination. In fact, it is often believed to represent solely an aesthetic addition that does not change the information already obtained with 2D and baseline 3D...
March 2024: Echocardiography
https://read.qxmd.com/read/38516862/3-d-transesophageal-echocardiography-aids-in-assessment-of-embolic-stroke-due-to-aortic-atherosclerotic-plaque-a-case-series
#13
Songnan Wen, Tasneem Z Naqvi
Atherosclerosis is the most common cause of heart disease and stroke. Plaque thickness ≥4 mm in the ascending aorta or aortic arch is strongly correlated with cerebral embolic events and ischemic stroke. However, despite imaging workup, the cause of embolic stroke remains unidentified in many patients. Transesophageal echocardiography (TEE) is the preferred echocardiographic method for the evaluation of cardiac source of emboli. 2D TEE imaging evaluates aortic root and aortic arch in a single plane or two planes with biplane imaging...
March 2024: Echocardiography
https://read.qxmd.com/read/38514120/-a-new-preoperative-simulation-using-magnetic-resonance-imaging-bone-like-imaging-with-zero-echo-time-sequence
#14
JOURNAL ARTICLE
Akihiro Inoue, Yasuhiro Shiraishi, Taichi Furumochi, Takeharu Kunieda
This study aimed to evaluate the clinical usefulness of zero-echo time(ZTE)-based magnetic resonance imaging(MRI)in planning an optimal surgical approach and applying ZTE for anatomical guidance during transcranial surgery. P atients who underwent transcranial surgery and carotid endarterectomy and for whom ZTE-based MRI and magnetic resonance angiography(MRA)data were obtained, were analyzed by creating ZTE/MRA fusion images and 3D-ZTE-based MRI models. We examined whether these images and models could be substituted for computed tomography imaging during neurosurgical procedures...
March 2024: No Shinkei Geka. Neurological Surgery
https://read.qxmd.com/read/38508291/fast-and-accessible-t2-mapping-using-off-resonance-corrected-despot2-with-application-to-3d-prostate
#15
JOURNAL ARTICLE
Ronal Coronado, Carlos Castillo-Passi, Cecilia Besa, Pablo Irarrazaval
PURPOSE: Most T1 and T2 mapping take long acquisitions or needs specialized sequences not widely accessible on clinical scanners. An available solution is DESPOT1/T2 (Driven equilibrium single pulse observation of T1/T2). DESPOT1/T2 uses Spoiled gradient-echo (SPGR) and balanced Steady-State Free Precession (bSSFP) sequences, offering an accessible and reliable way for 3D accelerated T1/T2 mapping. However, bSSFP is prone to off-resonance artifacts, limiting the application of DESPOT2 in regions with high susceptibility contrasts, like the prostate...
March 18, 2024: Magnetic Resonance Imaging
https://read.qxmd.com/read/38508083/characterization-of-the-collagen-network-of-human-cheek-skin-using-ultrasonic-microscopy
#16
JOURNAL ARTICLE
Shiro Mukae, Yuki Ogura, Yusuke Hara
Dermal collagen is the most abundant component of human skin and has a network structure that regulates the mechanical properties of the skin. Therefore, non-invasive characterization of the collagen network would be beneficial for the evaluation of skin conditions. The microscopic substructures of the network, which are individual bundles and fibers, have been optically investigated. However, the macroscopic structure of the collagen network has not been assessed. To evaluate the dermal collagen network, we developed two new indicators, volume filling factor (VFF) and collagen fiber texture (CFT), to analyze three-dimensional echo intensity maps of high-frequency ultrasonic microscopy...
March 16, 2024: Ultrasonics
https://read.qxmd.com/read/38503998/investigation-of-imaging-features-in-contrast-enhanced-magnetic-resonance-imaging-of-benign-and-malignant-breast-lesions
#17
JOURNAL ARTICLE
Kazunori Kubota, Tomoyuki Fujioka, Ukihide Tateishi, Mio Mori, Yuka Yashima, Emi Yamaga, Leona Katsuta, Ken Yamaguchi, Mitsuhiro Tozaki, Michiro Sasaki, Takayoshi Uematsu, Shuichi Monzawa, Ichiro Isomoto, Mizuka Suzuki, Hiroko Satake, Hiroshi Nakahara, Mariko Goto, Mari Kikuchi
PURPOSE: This study aimed to enhance the diagnostic accuracy of contrast-enhanced breast magnetic resonance imaging (MRI) using gadobutrol for differentiating benign breast lesions from malignant ones. Moreover, this study sought to address the limitations of current imaging techniques and criteria based on the Breast Imaging Reporting and Data System (BI-RADS). MATERIALS AND METHODS: In a multicenter retrospective study conducted in Japan, 200 women were included, comprising 100 with benign lesions and 100 with malignant lesions, all classified under BI-RADS categories 3 and 4...
March 20, 2024: Japanese Journal of Radiology
https://read.qxmd.com/read/38492786/application-of-the-magnetic-resonance-3d-multiecho-dixon-sequence-for-quantifying-hepatic-iron-overload-and-steatosis-in-patients-with-thalassemia
#18
JOURNAL ARTICLE
Fanyu Zhao, Yidi Chen, Ting Zhou, Cheng Tang, Jiang Huang, Huiting Zhang, Stephan Kannengiesser, Liling Long
OBJECTIVE: To investigate the feasibility and diagnostic efficacy of a 3D multiecho Dixon (qDixon) research application for simultaneously quantifying the liver iron concentration (LIC) and steatosis in thalassemia patients. MATERIALS AND METHODS: This prospective study enrolled participants with thalassemia who underwent 3 T MRI of the liver for the evaluation of hepatic iron overload. The imaging protocol including qDixon and conventional T2* mapping based on 2D multiecho gradient echo (ME GRE) sequences respectively...
March 14, 2024: Magnetic Resonance Imaging
https://read.qxmd.com/read/38492126/the-changes-of-oxygen-extraction-fraction-in-different-types-of-lesions-in-relapsing-remitting-multiple-sclerosis-a-cross-sectional-and-longitudinal-study
#19
JOURNAL ARTICLE
Yan Xie, Shun Zhang, Di Wu, Yihao Yao, Junghun Cho, Jun Lu, Hongquan Zhu, Yi Wang, Yan Zhang, Wenzhen Zhu
OBJECTIVES: To explore the oxygen metabolism level of different types of lesions in relapsing-remitting multiple sclerosis (RRMS) patients by oxygen extraction fraction (OEF) both cross-sectionally and longitudinally. METHODS: Forty-six RRMS patients and forty-one healthy controls (HC) went MRI examination. The quantitative susceptibility mapping (QSM) and OEF map were reconstructed from a 3D multi-echo gradient echo sequence. MS lesions in white matter were classified as contrast-enhancing lesions (CELs) on post-gadolinium T1-weighted sequence, paramagnetic rim lesions (PRLs), hyperintense lesions and non-hyperintense lesions on QSM, respectively...
March 16, 2024: Neurological Sciences
https://read.qxmd.com/read/38485759/identifying-delay-in-glymphatic-clearance-of-labeled-protons-post-acute-head-trauma-utilizing-3d-asl-mri-arterial-spin-labeling-a-pilot-study
#20
JOURNAL ARTICLE
Charles R Joseph, Jubin Kang Lim, Bryce N Grohol, Marija Zivcevska, Joshua Lencke, Ethan Dean Rich, Connor James Arrasmith, Ian Shepherd Dorman, Bradley Waman Clark, Kim Love, Ben Ferry, Mark E Rolfs
This study correlated mild traumatic brain injury (mTBI) cognitive changes with ASL-MRI glymphatic clearance rates (GCRs) and recovery with GCR improvement. mTBI disrupts the blood brain barrier (BBB), reducing capillary mean transit time and GCRs. mTBI is clinically diagnosed utilizing history/examination findings with no physiologic biomarkers. 3D TGSE (turbo-gradient spin-echo) pulsed arterial spin-labeling 3T MRI with 7 long inversion times (TIs) assessed the signal clearance of labeled protons 2800-4000 ms postlabeling in bifrontal, bitemporal, and biparietal regions within 7 days of mTBI and once clinically cleared to resume activities...
March 14, 2024: Scientific Reports
keyword
keyword
165807
1
2
Fetch more papers »
Fetching more papers... Fetching...
Remove bar
Read by QxMD icon Read
×

Save your favorite articles in one place with a free QxMD account.

×

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"

We want to hear from doctors like you!

Take a second to answer a survey question.