keyword
https://read.qxmd.com/read/38380361/predicting-the-status-of-lymphovascular-space-invasion-using-quantitative-parameters-from-synthetic-mri-in-cervical-squamous-cell-carcinoma-without-lymphatic-metastasis
#21
JOURNAL ARTICLE
Limei Guo, Runmei Zhang, Yi Xu, Wenqi Wu, Qian Zheng, Jianting Li, Jun Wang, Jinliang Niu
PURPOSE: To investigate the value of quantitative longitudinal relaxation time (T1), transverse relaxation time (T2), and proton density (PD) maps derived from synthetic magnetic resonance imaging (MRI) for evaluating the status of lymphovascular space invasion (LVSI) in cervical squamous cell carcinoma (CSCC) without lymph node metastasis (LNM). MATERIAL AND METHODS: Patients with suspected cervical cancer who visited our hospital from May 2020 to March 2023 were collected...
2024: Frontiers in Oncology
https://read.qxmd.com/read/38379586/intrapancreatic-fat-deposition-is-unrelated-to-liver-steatosis-in-metabolic-dysfunction-associated-steatotic-liver-disease
#22
JOURNAL ARTICLE
Anne Linde Mak, Nienke Wassenaar, Anne-Marieke van Dijk, Marian Troelstra, Veera Houttu, Koen van Son, Stan Driessen, Diona Zwirs, Sandra van den Berg-Faay, Elizabeth Shumbayawonda, Jurgen Runge, Michail Doukas, Joanne Verheij, Ulrich Beuers, Max Nieuwdorp, Djuna L Cahen, Aart Nederveen, Oliver Gurney-Champion, Adriaan Holleboom
BACKGROUND & AIMS: Individuals with obesity may develop intrapancreatic fat deposition (IPFD) and fatty pancreas disease (FPD). Whether this causes inflammation and fibrosis and leads to pancreatic dysfunction is less established than for liver damage in metabolic dysfunction-associated steatotic liver disease (MASLD). Moreover, the interrelations of FPD and MASLD are poorly understood. Therefore, we aimed to assess IPFD and fibro-inflammation in relation to pancreatic function and liver disease severity in individuals with MASLD...
March 2024: JHEP reports: innovation in hepatology
https://read.qxmd.com/read/38370011/precision-mri-phenotyping-of-muscle-volume-and-quality-at-a-population-scale
#23
JOURNAL ARTICLE
Marjola Thanaj, Nicolas Basty, Brandon Whitcher, Elena P Sorokin, Yi Liu, Ramprakash Srinivasan, Madeleine Cule, E Louise Thomas, Jimmy D Bell
Introduction: Magnetic resonance imaging (MRI) enables direct measurements of muscle volume and quality, allowing for an in-depth understanding of their associations with anthropometric traits, and health conditions. However, it is unclear which muscle volume measurements: total muscle volume, regional measurements, measurements of muscle quality: intermuscular adipose tissue (IMAT) or proton density fat fraction (PDFF), are most informative and associate with relevant health conditions such as dynapenia and frailty...
2024: Frontiers in Physiology
https://read.qxmd.com/read/38369329/-a-case-of-bilateral-middle-cerebellar-peduncle-infarction-with-hot-cross-bun-sign
#24
JOURNAL ARTICLE
Daisuke Kuzume, Yuko Morimoto, Satoshi Tsutsumi, Masahiro Yamasaki, Naohisa Hosomi
A 71-year-old man with hypertension and diabetes mellitus presented to our hospital because he felt lightheaded. Diffusion-weighted images (DWI) on brain MRI showed high signal lesions in the left cerebellar hemisphere and the right pons. The diagnosis of cerebellar infarction was made, but he refused treatment. One month later, he came to our hospital because his body leaned to the left. Neurological examination revealed dysarthria and cerebellar truncal ataxia. An electrocardiogram showed atrial fibrillation...
February 17, 2024: Rinshō Shinkeigaku, Clinical Neurology
https://read.qxmd.com/read/38368616/tensor-denoising-of-quantitative-multi-parameter-mapping
#25
JOURNAL ARTICLE
Helge Herthum, Stefan Hetzer
PURPOSE: Quantitative multi-parameter mapping (MPM) provides maps of physical quantities representing physiologically meaningful tissue characteristics, which allows to investigate microstructure-function relationships reflecting normal or pathologic processes in the brain. However, the achievable spatial resolution and stability of MPM for basic research or clinical applications is severely constrained by SNR limits of the MR acquisition process, resulting in relatively long acquisition times...
February 18, 2024: Magnetic Resonance in Medicine
https://read.qxmd.com/read/38349454/linearity-and-bias-of-proton-density-fat-fraction-across-the-full-dynamic-range-of-0-100-a-multiplatform-multivendor-phantom-study-using-1-5t-and-3t-mri-at-two-sites
#26
JOURNAL ARTICLE
Houchun H Hu, Henry Szu-Meng Chen, Diego Hernando
OBJECTIVE: Performance assessments of quantitative determinations of proton density fat fraction (PDFF) have largely focused on the range between 0 and 50%. We evaluate PDFF in a two-site phantom study across the full 0-100% PDFF range. MATERIALS AND METHODS: We used commercially available 3D chemical-shift-encoded water-fat MRI sequences from three MRI system vendors at 1.5T and 3T and conducted the study across two sites. A spherical phantom housing 18 vials spanning the full 0-100% PDFF range was used...
February 13, 2024: Magma
https://read.qxmd.com/read/38345606/primary-anterior-cruciate-ligament-repair-morphological-and-quantitative-assessment-by-7-t-mri-and-clinical-outcome-after-1-5-years
#27
JOURNAL ARTICLE
Milena L Pachowsky, Stefan Söllner, Kolja Gelse, Jannik Sambale, Armin M Nagel, Georg Schett, Marc Saake, Michael Uder, Frank W Roemer, Rafael Heiss
OBJECTIVES: The purpose of this study was to assess morphological and quantitative changes of the anterior cruciate ligament (ACL) and cartilage after ACL repair. METHODS: 7T MRI of the knee was acquired in 31 patients 1.5 years after ACL repair and in 13 controls. Proton density-weighted images with fat saturation (PD-fs) were acquired to assess ACL width, signal intensity, elongation, and fraying. T2/T2* mapping was performed for assessment of ACL and cartilage...
February 12, 2024: European Radiology
https://read.qxmd.com/read/38343192/mri-assessment-of-tendon-graft-after-lateral-ankle-ligament-reconstruction-does-ligamentization-exist
#28
JOURNAL ARTICLE
Guillaume Cordier, Sofiane Boudahmane, Jordan Ovigue, Frederick Michels, Gustavo Araujo Nunes, Benjamin Dallaudiere
BACKGROUND: No description exists in the literature about the normal evolution of tendon graft after a lateral ankle ligament (LAL) reconstruction. PURPOSE: To assess the magnetic resonance imaging (MRI) characteristics and the evolution of the tendon graft during different moments in the follow-up after an endoscopic reconstruction of the LAL. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: This prospective study included 37 consecutive patients who underwent an endoscopic reconstruction of the LAL with an autograft using the gracilis tendon to treat chronic ankle instability (CAI) resistant to nonoperative treatment (CAI group) and 16 patients without ankle instability (control group)...
February 11, 2024: American Journal of Sports Medicine
https://read.qxmd.com/read/38333443/comparison-of-the-glenoid-index-by-computed-tomography-with-magnetic-resonance-imaging
#29
JOURNAL ARTICLE
Nida A Ahmed, Kailash Narendran, Nishath A Ahmed, Prashanth A, B Holebasu, Mihit Kalawatia, Kunal Dudeja, Parijat Kamble, Roshan Prasad, Gaurav Mittal, Ravi Sangoi
Introduction Anterior shoulder instability results in labral and osseous glenoid injuries. With a large osseous defect, there is a risk of recurrent dislocation of the joint, and therefore the patient has to undergo surgical correction. An MRI evaluation of the patient helps to assess the soft tissue injury. Currently, the volumetric three-dimensional (3D) reconstructed CT image is the standard for measuring glenoid bone loss and the glenoid index. However, it has the disadvantage of exposing the patient to radiation and additional expenses...
January 2024: Curēus
https://read.qxmd.com/read/38332350/bone-age-assessment-based-on-different-mri-modalities-of-the-proximal-humerus-epiphysis-the-comparisons-of-t-1-wi-t-2-wi-and-pdwi
#30
JOURNAL ARTICLE
Yu-Su Jiao, Yilitabier Tuerhong, Cheng-Xu Chen, Xin-Hua Dai, Ting Lu, Zhao Peng, Zhen-Hua Deng, Fei Fan
Bone age assessment (BAA) is crucial in various fields, including legal proceedings, athletic competitions, and clinical medicine. However, the use of X-ray methods for age estimation without medical indication is subject to ethical debate, especially in forensic and athletic fields. The application of magnetic resonance imaging (MRI) with non-ionizing radiation can overcome this limitation in BAA. This study aimed to compare the application value of several MRI modalities of proximal humeral in BAA. A total of 468 patients with shoulder MRIs were retrospectively collected from a Chinese Han population aged 12-30 years (259 males and 209 females) for training and testing, including T1 weighted MRI (T1 WI), T2 weighted MRI (T2 WI), and Proton density weighted MRI (PDWI)...
February 9, 2024: International Journal of Legal Medicine
https://read.qxmd.com/read/38325186/comparison-of-the-accuracy-of-commercial-two-point-and-multi-echo-dixon-mri-for-quantification-of-fat-in-liver-paravertebral-muscles-and-vertebral-bone-marrow
#31
JOURNAL ARTICLE
Tobias Haueise, Fritz Schick, Norbert Stefan, Jürgen Machann
PURPOSE: Excess fat accumulation contributes significantly to metabolic dysfunction and diseases. This study aims to systematically compare the accuracy of commercially available Dixon techniques for quantification of fat fraction in liver, skeletal musculature, and vertebral bone marrow (BM) of healthy individuals, investigating biases and sex-specific influences. METHOD: 100 healthy White individuals (50 women) underwent abdominal MRI using two-point and multi-echo Dixon sequences...
March 2024: European Journal of Radiology
https://read.qxmd.com/read/38316687/ultrasound-attenuation-of-cortical-bone-correlates-with-biomechanical-microstructural-and-compositional-properties
#32
JOURNAL ARTICLE
Saeed Jerban, Victor Barrere, Behnam Namiranian, Yuanshan Wu, Salem Alenezi, Erik Dorthe, Darryl Dlima, Sameer B Shah, Christine B Chung, Jiang Du, Michael P Andre, Eric Y Chang
BACKGROUND: We investigated the relationship of two commonly used quantitative ultrasound (QUS) parameters, speed of sound (SoS) and attenuation coefficient (α), with water and macromolecular contents of bovine cortical bone strips as measured with ultrashort echo time (UTE) magnetic resonance imaging (MRI). METHODS: SoS and α were measured in 36 bovine cortical bone strips utilizing a single-element transducer with nominal 5 MHz center frequency based on the time of flight principles after accommodating for reflection losses...
February 6, 2024: European Radiology Experimental
https://read.qxmd.com/read/38316622/comprehensive-evaluation-of-magnetic-resonance-imaging-sequences-for-signal-intensity-based-assessment-of-anterior-cruciate-ligament-healing-following-surgical-treatment
#33
JOURNAL ARTICLE
Shankar G Kaushal, Jin-Young Kim, Mallika Singh, Mo Han, Sean W Flannery, Dominique A Barnes, Kirsten Ecklund, Martha M Murray, Gary J Badger, Braden C Fleming, Ata M Kiapour
Normalized signal intensity (SI) obtained from magnetic resonance imaging (MRI) has been used to track anterior cruciate ligament (ACL) postoperative remodeling. We aimed to assess the effect of MRI sequence (PD: proton density-weighted; T2: T2-weighted; CISS: constructive interference in steady state) on postoperative changes in healing ACLs/grafts. We hypothesized that CISS is better at detecting longitudinal SI and texture changes of the healing ACL/graft compared to the common clinical sequences (PD and T2)...
February 5, 2024: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://read.qxmd.com/read/38316132/advanced-fibrosis-leads-to-overestimation-of-steatosis-with-quantitative-ultrasound-in-individuals-without-hepatic-steatosis
#34
JOURNAL ARTICLE
Takashi Kumada, Hidenori Toyoda, Sadanobu Ogawa, Tatsuya Gotoh, Yasuaki Suzuki, Kento Imajo, Katsutoshi Sugimoto, Tatsuya Kakegawa, Hidekatsu Kuroda, Yutaka Yasui, Nobuharu Tamaki, Masayuki Kurosaki, Namiki Izumi, Tomoyuki Akita, Junko Tanaka, Atsushi Nakajima
PURPOSE: The effect of hepatic fibrosis stage on quantitative ultrasound based on the attenuation coefficient (AC) for liver lipid quantification is controversial. The objective of this study was to determine how the degree of fibrosis assessed by magnetic resonance (MR) elastography affects AC based on the ultrasound-guided attenuation parameter according to the grade of hepatic steatosis, using magnetic resonance imaging (MRI)-derived proton density fat fraction (MRIderived PDFF) as the reference standard...
December 11, 2023: Ultrasonography
https://read.qxmd.com/read/38311058/a-composite-blood-biomarker-including-akr1b10-and-cytokeratin-18-for-progressive-types-of-nonalcoholic-fatty-liver-disease
#35
JOURNAL ARTICLE
Seung Joon Choi, Sungjin Yoon, Kyoung-Kon Kim, Doojin Kim, Hye Eun Lee, Kwang Gi Kim, Seung Kak Shin, Ie Byung Park, Seong Min Kim, Dae Ho Lee
BACKGROUND: We aimed to evaluate whether composite blood biomarkers including aldo-keto reductase family 1 member B10 (AKR1B10) and cytokeratin 18 (CK-18; a nonalcoholic steatohepatitis [NASH] marker) have clinically applicable performance for the diagnosis of NASH, advanced liver fibrosis, and high-risk NASH (NASH+significant fibrosis). METHODS: A total of 116 subjects including healthy control subjects and patients with biopsy-proven nonalcoholic fatty liver disease (NAFLD) were analyzed to assess composite blood-based and imaging-based biomarkers either singly or in combination...
February 1, 2024: Diabetes & Metabolism Journal
https://read.qxmd.com/read/38305588/reference-values-for-water-specific-t1-of-the-liver-at-3%C3%A2-t-t2-compensation-and-the-confounding-effects-of-fat
#36
JOURNAL ARTICLE
Richard B Thompson, Rachel Sherrington, Christian Beaulieu, Amy Kirkham, David I Paterson, Peter Seres, Justin Grenier
BACKGROUND: T1 mapping of the liver is confounded by the presence of fat. Multiparametric T1 mapping combines fat-water separation with T1-weighting to enable imaging of water-specific T1 (T1Water ), proton density fat fraction (PDFF), and T2* values. However, normative T1Water values in the liver and its dependence on age/sex is unknown. PURPOSE: Determine normative values for T1Water in the liver with comparison to MOLLI and evaluate a T2*-compensation approach to reduce T1 variability...
February 2, 2024: Journal of Magnetic Resonance Imaging: JMRI
https://read.qxmd.com/read/38297322/application-of-machine-learning-based-multi-sequence-mri-radiomics-in-diagnosing-anterior-cruciate-ligament-tears
#37
JOURNAL ARTICLE
Qi Cheng, Haoran Lin, Jie Zhao, Xiao Lu, Qiang Wang
OBJECTIVE: To compare the diagnostic power among various machine learning algorithms utilizing multi-sequence magnetic resonance imaging (MRI) radiomics in detecting anterior cruciate ligament (ACL) tears. Additionally, this research aimed to create and validate the optimal diagnostic model. METHODS: In this retrospective analysis, 526 patients were included, comprising 178 individuals with ACL tears and 348 with a normal ACL. Radiomics features were derived from multi-sequence MRI scans, encompassing T1-weighted imaging and proton density (PD)-weighted imaging...
January 31, 2024: Journal of Orthopaedic Surgery and Research
https://read.qxmd.com/read/38294946/a-comparative-study-of-hepatic-steatosis-using-two-different-qualitative-ultrasound-techniques-measured-based-on-magnetic-resonance-imaging-derived-proton-density-fat-fraction
#38
JOURNAL ARTICLE
Sadanobu Ogawa, Takashi Kumada, Tatsuya Gotoh, Fumihiko Niwa, Hidenori Toyoda, Junko Tanaka, Masahito Shimizu
AIM: This study aimed to evaluate the diagnostic performance of attenuation measurement (ATT; dual-frequency method) and improved algorithm of ATT (iATT; reference method) for the assessment of hepatic steatosis using magnetic resonance imaging (MRI)-derived proton density fat fraction (PDFF) as the reference standard. METHODS: We prospectively analyzed 427 patients with chronic liver disease who underwent ATT, iATT, or MRI-derived PDFF. Correlation coefficients were analyzed, and diagnostic values were evaluated by area under the receiver operating characteristic curve (AUROC)...
January 31, 2024: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://read.qxmd.com/read/38293745/cardiac-remodelling-in-non-alcoholic-fatty-liver-disease-in-the-general-population
#39
JOURNAL ARTICLE
Frederik Kostka, Till Ittermann, Stefan Groß, Fabian Christopher Laqua, Robin Bülow, Henry Völzke, Marcus Dörr, Jens Peter Kühn, Marcello Ricardo Paulista Markus, Marie-Luise Kromrey
BACKGROUND AND AIMS: Non-alcoholic fatty liver disease (NAFLD) is associated with increased risk for cardiovascular disease. Our study investigates the contribution of NAFLD to changes in cardiac structure and function in a general population. METHODS: One thousand ninety-six adults (49.3% female) from the Study of Health in Pomerania underwent magnetic resonance imaging including cardiac and liver imaging. The presence of NAFLD by proton density fat fraction was related to left cardiac structure and function...
January 31, 2024: Liver International: Official Journal of the International Association for the Study of the Liver
https://read.qxmd.com/read/38283269/correlation-between-ultrasonography-and-mr-proton-density-fat-fraction-techniques-in-evaluating-the-severity-of-liver-steatosis
#40
JOURNAL ARTICLE
Betul Kizildag, Murat Baykara, Nursel Yurttutan, Halit Vicdan
BACKGROUND AND AIM: To investigate the relationship between ultrasonography (US) and magnetic resonance (MR) proton density fat fraction (PDFF) techniques, using the modified DIXON method, in determining the severity of liver steatosis. MATERIALS AND METHODS: This study included seventy consecutive patients who underwent upper abdominal MRI for various reasons between June 2016 and January 2017. Fatty liver staging was performed using US as indicated.The liver fat percentage was measured and staged according to PDFF values...
2024: Hepatol Forum
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