keyword
https://read.qxmd.com/read/38537059/an-mri-radiomics-approach-to-discriminate-hemorrhage-prone-intracranial-tumors-before-stereotactic-biopsy
#1
JOURNAL ARTICLE
Yupeng Zhang, Tingliang Cao, Haoyu Zhu, Yuqi Song, Changxuan Li, Chuhan Jiang, Chao Ma
PURPOSE: To explore imaging biomarkers predictive of intratumoral hemorrhage for lesions intended for elective stereotactic biopsy. METHOD: This study included a retrospective cohort of 143 patients with 175 intracranial lesions intended for stereotactic biopsy. All the lesions were randomly split into a training dataset (n=121) and a test dataset (n=54) at a ratio of 7:3. 34 lesions were defined as "hemorrhage-prone tumors" as hemorrhage occurred between initial diagnostic MRI acquisition and the scheduled biopsy procedure...
April 3, 2024: International Journal of Surgery
https://read.qxmd.com/read/38536557/non-contrast-mri-of-micro-vascularity-of-the-feet-and-toes
#2
JOURNAL ARTICLE
Won C Bae, Vadim Malis, Diana Vucevic, Asako Yamamoto, Katsumi Nakamura, John Lane, Mitsue Miyazaki
PURPOSE: This study aimed to develop novel non-contrast MR perfusion techniques for assessing micro-vascularity of the foot in human subjects. METHODS: All experiments were performed on a clinical 3 T scanner using arterial spin labeling (ASL). Seven healthy subjects (30-72 years old, 5 males and 2 females) were enrolled and bilateral feet were imaged with tag-on and tag-off alternating inversion recovery spin labeling for determining micro-vascularity...
March 27, 2024: Japanese Journal of Radiology
https://read.qxmd.com/read/38536464/automated-graded-prognostic-assessment-for-patients-with-hepatocellular-carcinoma-using-machine-learning
#3
JOURNAL ARTICLE
Moritz Gross, Stefan P Haider, Tal Ze'evi, Steffen Huber, Sandeep Arora, Ahmet S Kucukkaya, Simon Iseke, Bernhard Gebauer, Florian Fleckenstein, Marc Dewey, Ariel Jaffe, Mario Strazzabosco, Julius Chapiro, John A Onofrey
BACKGROUND: Accurate mortality risk quantification is crucial for the management of hepatocellular carcinoma (HCC); however, most scoring systems are subjective. PURPOSE: To develop and independently validate a machine learning mortality risk quantification method for HCC patients using standard-of-care clinical data and liver radiomics on baseline magnetic resonance imaging (MRI). METHODS: This retrospective study included all patients with multiphasic contrast-enhanced MRI at the time of diagnosis treated at our institution...
March 27, 2024: European Radiology
https://read.qxmd.com/read/38535775/the-utility-of-spectroscopic-mri-in-stereotactic-biopsy-and-radiotherapy-guidance-in-newly-diagnosed-glioblastoma
#4
JOURNAL ARTICLE
Abinand C Rejimon, Karthik K Ramesh, Anuradha G Trivedi, Vicki Huang, Eduard Schreibmann, Brent D Weinberg, Lawrence R Kleinberg, Hui-Kuo G Shu, Hyunsuk Shim, Jeffrey J Olson
Current diagnostic and therapeutic approaches for gliomas have limitations hindering survival outcomes. We propose spectroscopic magnetic resonance imaging as an adjunct to standard MRI to bridge these gaps. Spectroscopic MRI is a volumetric MRI technique capable of identifying tumor infiltration based on its elevated choline (Cho) and decreased N-acetylaspartate (NAA). We present the clinical translatability of spectroscopic imaging with a Cho/NAA ≥ 5x threshold for delineating a biopsy target in a patient diagnosed with non-enhancing glioma...
March 20, 2024: Tomography: a Journal for Imaging Research
https://read.qxmd.com/read/38535492/iron-oxide-magnetite-based-nanobiomaterial-with-medical-applications-environmental-hazard-assessment-using-terrestrial-model-species
#5
JOURNAL ARTICLE
Susana I L Gomes, Janeck J Scott-Fordsmand, Mónica J B Amorim
Nanobiomaterials (NBMs) have tremendous potential applications including in cancer diagnosis and treatment. However, the health and environmental effects of NBMs must be thoroughly assessed to ensure safety. Fe3 O4 (magnetite) nanoparticles coated with polyethylene glycol (PEG) and poly (lactic-co-glycolic acid) (PLGA) were one of the focus NBMs within the EU project BIORIMA. Fe3 O4 PEG-PLGA has been proposed to be used as a contrast agent in magnetic resonance imaging for the identification of solid tumors and has revealed low cytotoxicity in several cell lines...
February 22, 2024: Journal of Xenobiotics
https://read.qxmd.com/read/38535146/magnetic-resonance-imaging-as-a-diagnostic-tool-for-ilio-femoro-caval-deep-venous-thrombosis
#6
JOURNAL ARTICLE
Lisbeth Lyhne, Kim Christian Houlind, Johnny Christensen, Radu L Vijdea, Meinhard R Hansen, Malene Roland V Pedersen, Helle Precht
This study aimed to test the accuracy of a magnetic resonance imaging (MRI)-based method to detect and characterise deep venous thrombosis (DVT) in the ilio-femoro-caval veins. Patients with verified DVT in the lower extremities with extension of the thrombi to the iliac veins, who were suitable for catheter-based venous thrombolysis, were included in this study. Before the intervention, magnetic resonance venography (MRV) was performed, and the ilio-femoro-caval veins were independently evaluated for normal appearance, stenosis, and occlusion by two single-blinded observers...
March 8, 2024: Journal of Imaging
https://read.qxmd.com/read/38535073/evaluation-of-whole-brain-intravoxel-incoherent-motion-ivim-imaging
#7
JOURNAL ARTICLE
Kamil Lipiński, Piotr Bogorodzki
Intravoxel Incoherent Motion (IVIM) imaging provides non-invasive perfusion measurements, eliminating the need for contrast agents. This work explores the feasibility of IVIM imaging in whole brain perfusion studies, where an isotropic 1 mm voxel is widely accepted as a standard. This study follows the validity of a time-limited, precise, segmentation-ready whole-brain IVIM protocol suitable for clinical reality. To assess the influence of SNR on the estimation of S0 , f , D* , and D IVIM parameters, a series of measurements and simulations were performed in MATLAB for the following three estimation techniques: segmented grid search, segmented curve fitting, and one-step curve fitting, utilizing known "ground truth" and noised data...
March 20, 2024: Diagnostics
https://read.qxmd.com/read/38535068/rotator-cuff-muscle-imbalance-in-patients-with-chronic-anterior-shoulder-instability
#8
JOURNAL ARTICLE
Du-Han Kim, Ji-Hoon Kim, Chul-Hyun Cho
(1) Background: Both intra-articular pathologies and muscle imbalance can be a cause of shoulder instability. The purpose of this study is to examine the cross-sectional areas of the rotator cuff muscle in patients with acute and chronic anterior shoulder instability and to determine the associations between imbalance and chronicity of the rotator cuff. (2) Methods: Patients with confirmed dislocation of the anterior shoulder were included. The patients were divided into two groups according to the time between the initial dislocation event and when MRI imaging was performed Measurements of the rotator cuff muscle areas were performed in the scapular Y view and glenoid face view using MRI...
March 19, 2024: Diagnostics
https://read.qxmd.com/read/38535052/automatic-active-lesion-tracking-in-multiple-sclerosis-using-unsupervised-machine-learning
#9
JOURNAL ARTICLE
Jason Uwaeze, Ponnada A Narayana, Arash Kamali, Vladimir Braverman, Michael A Jacobs, Alireza Akhbardeh
BACKGROUND: Identifying active lesions in magnetic resonance imaging (MRI) is crucial for the diagnosis and treatment planning of multiple sclerosis (MS). Active lesions on MRI are identified following the administration of Gadolinium-based contrast agents (GBCAs). However, recent studies have reported that repeated administration of GBCA results in the accumulation of Gd in tissues. In addition, GBCA administration increases health care costs. Thus, reducing or eliminating GBCA administration for active lesion detection is important for improved patient safety and reduced healthcare costs...
March 16, 2024: Diagnostics
https://read.qxmd.com/read/38535042/fusion-imaging-of-non-invasive-and-invasive-cardiac-electroanatomic-mapping-in-patients-with-ventricular-ectopic-beats-a-feasibility-analysis-in-a-case-series
#10
Matilda Muça, Stepan Zubarev, Dirk Bastian, Janusch Walaschek, Veronica Buia, Harald Rittger, Arsenii Dokuchaev, Thomas Bayer, Laura Vitali-Serdoz
In patients with premature ventricular contractions (PVCs), non-invasive mapping could locate the PVCs' origin on a personalized 3-dimensional (3D) heart model and, thus, facilitate catheter ablation therapy planning. The aim of our report is to evaluate its accuracy compared to invasive mapping in terms of assessing the PVCs' early activation zone (EAZ). For this purpose, non-invasive electrocardiographic imaging (ECGI) was performed using the Amycard 01C system (EP Solutions SA, Switzerland) in three cases...
March 15, 2024: Diagnostics
https://read.qxmd.com/read/38535009/cardiac-magnetic-resonance-imaging-based-ischemic-injury-pattern-in-patients-with-acute-myocardial-infarction-sensu-left-ventricular-global-systolic-function
#11
JOURNAL ARTICLE
Lyudmila Salyamova, Valentin Oleynikov, Natalia Donetskaya, Alexander Vdovkin, Angelina Chernova, Irina Avdeeva
The purpose of the study was to identify factors characterizing a decrease in LV global systolic function in patients with ST-segment elevation myocardial infarction (STEMI) after revascularization using cardiac magnetic resonance imaging (MRI)-based ischemic injury pattern and laboratory parameters sensu left ventricular global systolic function. A total of 109 STEMI patients were examined. The patients underwent contrast-enhanced cardiac MRI with a 1.5 Tesla GE SIGNA Voyager (GE HealthCare, Chicago, IL, USA) on the 7th-10th days from the onset of the disease...
March 11, 2024: Diagnostics
https://read.qxmd.com/read/38534511/emerging-trends-in-magnetic-resonance-fingerprinting-for-quantitative-biomedical-imaging-applications-a-review
#12
REVIEW
Anmol Monga, Dilbag Singh, Hector L de Moura, Xiaoxia Zhang, Marcelo V W Zibetti, Ravinder R Regatte
Magnetic resonance imaging (MRI) stands as a vital medical imaging technique, renowned for its ability to offer high-resolution images of the human body with remarkable soft-tissue contrast. This enables healthcare professionals to gain valuable insights into various aspects of the human body, including morphology, structural integrity, and physiological processes. Quantitative imaging provides compositional measurements of the human body, but, currently, either it takes a long scan time or is limited to low spatial resolutions...
February 28, 2024: Bioengineering
https://read.qxmd.com/read/38534204/clinical-significance-of-posterior-expansion-of-the-utricular-endolymphatic-space
#13
JOURNAL ARTICLE
Hideyuki Kaida, Tadao Yoshida, Satofumi Sugimoto, Masumi Kobayashi, Shinji Naganawa, Michihiko Sone
BACKGROUND: Posterior expansion of the utricular endolymphatic space (ES) is a finding occasionally observed, and often occurs in bilateral ears. The clinical significance of posterior expansion of the utricular ES is not clear. OBJECTIVES: To investigate the clinical significance of posterior expansion of the utricular ES detected on magnetic resonance imaging (MRI). MATERIALS AND METHODS: Among 957 patients who underwent contrast-enhanced MRI to investigate the presence of endolymphatic hydrops (EH), clinical findings in cases with posterior expansion of the utricular ES were evaluated and the significance of their existence is considered...
March 27, 2024: Acta Oto-laryngologica
https://read.qxmd.com/read/38533913/case-report-systemic-lupus-erythematosus-combined-with-myocardial-hypertrophy
#14
JOURNAL ARTICLE
Shanshan Wang, Xinfeng Wei, Wenqing Yang, Dan Zhang
OBJECTIVE: Systemic lupus erythematosus (SLE) is a multisystem-involved, highly heterogeneous autoimmune disease with diverse clinical manifestations. We report an extremely rare case of SLE with severe diffuse myocardial hypertrophy. METHODS: The patient's echocardiography and cardiac magnetic resonance imaging (CMR) results indicated diffuse myocardial hypertrophy. After excluding coronary atherosclerosis, hypertensive cardiomyopathy, drug toxicity, and other causes, the patient was diagnosed with SLE-specific cardiomyopathy...
March 2024: Immunity, Inflammation and Disease
https://read.qxmd.com/read/38533795/improving-magnetic-resonance-imaging-and-chemodynamic-therapy-properties-via-tuning-the-fe-ii-fe-iii-ratio-in-hydrophilic-single-atom-nanobowls
#15
JOURNAL ARTICLE
Qing Luo, Qian Ma, Taoxia Liu, Yiting Luo, Lianying Wang, Chang Guo, Leyu Wang
We developed an intrinsic hydrophilic single-atom iron nanobowl (Fe-SANB) for magnetic resonance imaging (MRI)-guided tumor microenvironment-triggered cancer therapy. Benefiting from the sufficient exposure of Fe single atoms and the intrinsic hydrophilicity of the bowl-shaped structure, the Fe-SANBs exhibited a superior performance for T 1 -weighted MRI with an r 1 value of 11.48 mM-1 s-1 , which is 3-fold higher than that of the commercial Gd-DTPA ( r 1 = 3.72 mM-1 s-1 ). After further coembedding Gd single atoms in the nanobowls, the r 1 value can be greatly improved to 19...
March 27, 2024: ACS Nano
https://read.qxmd.com/read/38533724/atypical-co-development-of-the-thalamus-and-cortex-in-autism-evidence-from-age-related-white-gray-contrast-change
#16
JOURNAL ARTICLE
Gleb Bezgin, John D Lewis, Vladimir S Fonov, D Louis Collins, Alan C Evans
Recent studies have shown that white-gray contrast (WGC) of either cortical or subcortical gray matter provides for accurate predictions of age in typically developing (TD) children, and that, at least for the cortex, it changes differently with age in subjects with autism spectrum disorder (ASD) compared to their TD peers. Our previous study showed different patterns of contrast change between ASD and TD in sensorimotor and association cortices. While that study was confined to the cortex, we hypothesized that subcortical structures, particularly the thalamus, were involved in the observed cortical dichotomy between lower and higher processing...
April 2024: Human Brain Mapping
https://read.qxmd.com/read/38533346/detection-of-reduced-diameter-of-the-cochlear-nerve-in-long-term-deaf-patients-quantified-with-semiautomatic-measurement-of-nerve-cross-sectional-area-using-3t-mri-data
#17
JOURNAL ARTICLE
Katrin Reimann, Uwe Klose, Ulrike Ehrenpfordt, Kruthika Thangavelu, Maximilian Schulze
HYPOTHESIS: High-resolution parallel transmit T2 sampling perfection with application optimized contrast using different flip angle evolution sequence with improved edge discrimination and semiautomatic determination of nerve cross-sectional area (CSA) can be used to evaluate nerve degeneration in the inner auditory canal (IAC) in long-term deaf patients. BACKGROUND: In patients with hearing loss, temporal bone MRI is routinely acquired to evaluate the morphology of the nerves within the IAC...
March 2024: Otol Neurotol Open
https://read.qxmd.com/read/38532801/improved-visualization-of-median-ulnar-nerves-and-small-branches-in-the-wrist-and-palm-using-contrast-enhanced-magnetic-resonance-neurography
#18
JOURNAL ARTICLE
Jiamin Kang, Wenjun Wu, Xiangchuang Kong, Yu Su, Dingxi Liu, Chungao Li, Nan Gao, Youzhi Wang, Chuansheng Zheng, Yuxiong Weng, Lixia Wang
BACKGROUND: Magnetic resonance imaging of peripheral nerves in the wrist and palm is challenging due to the small size, tortuous course, complex surrounding tissues, and accompanying blood vessels. The occurrence of carpal palmar lesions leads to edema, swelling, and mass effect, which may further interfere with the display and identification of nerves. OBJECTIVE: To evaluate whether contrast-enhanced magnetic resonance neurography (ceMRN) improves the visualization of the morphology and pathology of the median, ulnar nerves, and their small branches in the wrist and palm...
2024: Therapeutic Advances in Neurological Disorders
https://read.qxmd.com/read/38531564/investigation-of-renal-perfusion-and-pathological-changes-in-patients-with-acute-kidney-disease-and-tubulointerstitial-nephritis-using-intravoxel-incoherent-motion-and-arterial-spin-labelling-mri-a-prospective-observational-study-protocol
#19
JOURNAL ARTICLE
Jiajia Liu, Rui Wang, Jianxing Qiu, Tao Su
INTRODUCTION: Acute kidney injury (AKI) is a critical condition with a complex aetiology and different outcomes, where haemodynamic dysfunction, renal hypoperfusion and inflammation serve as key contributors to its development and progression. Early and accurate diagnosis is vital for initiating targeted treatments like fluid resuscitation, vasoactive agents or steroid therapy, which are essential for improving patient outcomes. Intravoxel incoherent motion (IVIM) MRI assesses both capillary perfusion and tissue water diffusion, while arterial spin labelling (ASL) MRI measures renal blood flow without the need for contrast...
March 25, 2024: BMJ Open
https://read.qxmd.com/read/38531539/patient-satisfaction-with-ultrasound-whole-body-ct-and-whole-body-diffusion-weighted-mri-for-pre-operative-ovarian-cancer-staging-a-multicenter-prospective-cross-sectional-survey
#20
JOURNAL ARTICLE
Patrícia Pinto, Lil Valentin, Martina Borčinová, Markéta Wiesnerová, Fruhauf Filip, Andrea Burgetova, Martin Masek, Lukas Lambert, Valentina Chiappa, Dorella Franchi, Antonia Carla Testa, Francesca Moro, Giacomo Avesani, Camilla Panico, Sarah Alessi, Paola Pricolo, Raffaella Vigorito, Giuseppina Calareso, Roman Kocian, Jiri Slama, Anna Fagotti, Ailyn Mariela Vidal Urbinati, Mauro Signorelli, Francesca Bertolina, David Cibula, Daniela Fischerova
BACKGROUND: In addition to the diagnostic accuracy of imaging methods, patient-reported satisfaction with imaging methods is important. OBJECTIVE: To report a secondary outcome of the prospective international multicenter Imaging Study in Advanced ovArian Cancer (ISAAC Study), detailing patients' experience with abdomino-pelvic ultrasound, whole-body contrast-enhanced computed tomography (CT), and whole-body diffusion-weighted magnetic resonance imaging (WB-DWI/MRI) for pre-operative ovarian cancer work-up...
March 26, 2024: International Journal of Gynecological Cancer
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