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Journals Topics in Magnetic Resonance I...

Topics in Magnetic Resonance Imaging : TMRI

https://read.qxmd.com/read/38836588/abnormal-development-of-the-corpus-callosum-in-autism-spectrum-disorder-an-mri-study
#1
JOURNAL ARTICLE
Suvarna Badhe, Samson Nivins, Pooja Kulkarni, Alitta Jose, Divesh Manek, Satyendra Badhe, Hemangi Sane, Nandini Gokulchandran, Prerna Badhe, Alok Sharma
BACKGROUND: Altered size in the corpus callosum (CC) has been reported in individuals with autism spectrum disorder (ASD), but few studies have investigated younger children. Moreover, knowledge about the age-related changes in CC size in individuals with ASD is limited. OBJECTIVES: Our objective was to investigate the age-related size of the CC and compare them with age-matched healthy controls between the ages of 2 and 18 years. METHODS: Structural-weighted images were acquired in 97 male patients diagnosed with ASD; published data were used for the control group...
June 1, 2024: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/38598426/multiple-ring-enhancing-brain-lesions-fulminant-diffuse-cerebral-toxoplasmosis-or-cerebral-metastases
#2
JOURNAL ARTICLE
Sebastiaan De Keersmaecker, Sofie Van Cauter, Kim Bekelaar
In this case report, we describe a 76-year-old woman, presenting with dizziness for the past 2 months, without other focal neurological signs. A magnetic resonance imaging of the brain was ordered by her GP. The MRI demonstrated multiple ring-enhancing lesions, both supratentorial and infratentorial. Lumbar puncture showed normal findings, in particular a normal cell count and culture. Because of the radiologic appearance, initially thought to be suggestive of cerebral abscesses, antibiotics were started. However, further workup revealed a new diagnosis of a stage IV (metastatic) small cell lung carcinoma, making diffuse brain metastases more likely...
April 1, 2024: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/38329378/magnetic-resonance-imaging-in-preterm-infant-a-systematic-review-on-clinical-procedure-safety
#3
JOURNAL ARTICLE
Raffaele Falsaperla, Silvia Marino, Noemi Ganci, Guido Leone, Catia Romano, Angela Tropea, Placido Romeo, Janette Mailo, Martino Ruggieri
BACKGROUND: Currently, there is no evidence that MRI produces harmful effects on premature newborns, as well as short-term and long-term safety issues regarding radiofrequency fields and loud acoustic environment, while the examination that is being performed has not been clearly investigated. MRI of the brain conducted on preterm infants should be part of the diagnostic workup, when necessary. This article is intended to evaluate the short-term safety of MRI performed in preterm infants, when required, by analyzing all vital parameters available before, during, and after the MRI procedures...
February 1, 2024: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/38051029/biparametric-quantitative-mri-for-prostate-cancer-detection
#4
JOURNAL ARTICLE
Meltem Uyanik, Hari T Vigneswaran, Graham R Hale, Peter Gann, Richard Magin, Michael R Abern
OBJECTIVES: This study sought to prospectively investigate a novel quantitative biparametric prostate magnetic resonance imaging (MRI) protocol to detect prostate cancer (PCa) in biopsy-naïve men. Secondarily, this study reports the accuracy of fractional order calculus (FROC) diffusion and quantitative T2 compared with the Prostate Imaging Reporting & Data System (PI-RADS). METHODS: This prospective pilot study (NCT04175730) enrolled 50 prostate biopsy-naïve men who met eligibility criteria...
December 1, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/38051028/longitudinal-magnetic-resonance-imaging-based-superficial-femoral-artery-velocity-measurements-in-diabetic-and-nondiabetic-patients-with-peripheral-artery-disease
#5
JOURNAL ARTICLE
Ankita Sinharoy, Neeti Reddy, John Kent Lin, Vijay Nambi, Eric Y Yang, Panagiotis Kougias, Addison A Taylor, Alan B Lumsden, Christie M Ballantyne, Gerd Brunner
BACKGROUND: Longitudinal associations of noninvasive 2-dimensional phase-contrast magnetic resonance imaging (2D-PC-MRI) velocity markers of the superficial femoral artery (SFA) were analyzed along with the characteristics of peripheral artery disease (PAD). We hypothesized that the 2-year differences in MRI-based measures of SFA velocity were associated with longitudinal changes in markers of PAD. METHODS: A total of 33 (11 diabetic, 22 nondiabetic) patients with PAD with baseline and 2-year follow-up MRI scans were included in this secondary analysis of the Effect of Lipid Modification on Peripheral Artery Disease after Endovascular Intervention Trial (ELIMIT)...
December 1, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37796647/locally-low-rank-denoising-of-multi-echo-functional-mri-data-with-application-in-resting-state-analysis
#6
JOURNAL ARTICLE
Nolan K Meyer, Daehun Kang, Zaki Ahmed, Myung-Ho In, Yunhong Shu, John Huston, Matt A Bernstein, Joshua D Trzasko
OBJECTIVES: Locally low-rank (LLR) denoising of functional magnetic resonance imaging (fMRI) time series image data is extended to multi-echo (ME) data. The proposed method extends the capabilities of non-physiologic noise suppression beyond single-echo applications with a dedicated ME algorithm. MATERIALS AND METHODS: Following an institutional review board (IRB) approved protocol, resting-state fMRI data were acquired in 7 healthy subjects. A compact 3T scanner enabled whole-brain acquisition of multiband ME fMRI data at high spatial resolution (1...
October 1, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37768305/locally-low-rank-denoising-of-multi-echo-functional-mri-data-with-application-in-resting-state-analysis
#7
JOURNAL ARTICLE
Nolan K Meyer, Daehun Kang, Zaki Ahmed, Myung-Ho In, Yunhong Shu, John Huston, Matt A Bernstein, Joshua D Trzasko
OBJECTIVES: Locally low-rank (LLR) denoising of functional magnetic resonance imaging (fMRI) time series image data is extended to multi-echo (ME) data. The proposed method extends the capabilities of non-physiologic noise suppression beyond single-echo applications with a dedicated ME algorithm. MATERIALS AND METHODS: Following an institutional review board (IRB) approved protocol, resting-state fMRI data were acquired in 7 healthy subjects. A compact 3T scanner enabled whole-brain acquisition of multiband ME fMRI data at high spatial resolution (1...
September 28, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37619372/value-of-magnetic-resonance-imaging-for-skeletal-bone-age-assessment-in-healthy-male-children
#8
JOURNAL ARTICLE
Lajos M Basten, Daniel Leyhr, Dennis Murr, Thomas Hauser, Dennis Lüdin, Michael Romann, Oliver Höner, Sebastian Fischer, Tatjana Gruber-Rouh, Katrin Eichler
BACKGROUND: Skeletal bone age assessment for medical reasons is usually performed by conventional x-ray with use of ionizing radiation. Few pilot studies have shown the possible use of magnetic resonance imaging (MRI). PURPOSE: To comprehensively evaluate feasibility and value of MRI for skeletal bone age (SBA) assessment in healthy male children. MATERIALS AND METHODS: In this prospective cross-sectional study, 63 male soccer athletes with mean age of 12...
August 24, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37540631/mediastinal-hemangioma-masquerading-as-a-simple-cyst
#9
JOURNAL ARTICLE
Romina D'Souza, Prodipto Pal, Binita Chacko, Lan-Chau Kha, Anastasia Oikonomou, Christian Houbois
This report presents imaging from a mediastinal mass in a patient with colon cancer. At baseline and surveillance chest computed tomography examinations, it was characterized as a pericardial cyst. However, during chemotherapy, complications arose and this mass was further characterized with a chest MRI. It was then decided to be removed, and histopathology confirmed the diagnosis of a hemangioma.
August 1, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37459586/mediastinal-hemangioma-masquerading-as-a-simple-cyst
#10
JOURNAL ARTICLE
Romina D'Souza, Prodipto Pal, Binita Chacko, Lan-Chau Kha, Anastasia Oikonomou, Christian Houbois
This report presents imaging from a mediastinal mass in a patient with colon cancer. At baseline and surveillance chest computed tomography examinations, it was characterized as a pericardial cyst. However, during chemotherapy, complications arose and this mass was further characterized with a chest MRI. It was then decided to be removed, and histopathology confirmed the diagnosis of a hemangioma.
July 14, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37058709/myocardial-scar-detection-using-high-resolution-free-breathing-3d-dark-blood-and-standard-breath-holding-2d-bright-blood-late-gadolinium-enhancement-mri-a-comparison-of-observer-confidence
#11
JOURNAL ARTICLE
Hedwig M J M Nies, Bibi Martens, Suzanne Gommers, Geertruida P Bijvoet, Joachim E Wildberger, Rachel M A Ter Bekke, Robert J Holtackers, Casper Mihl
OBJECTIVE: To compare observer confidence for myocardial scar detection using 3 different late gadolinium enhancement (LGE) data sets by 2 observers with different levels of experience. MATERIALS AND METHODS: Forty-one consecutive patients, who were referred for 3D dark-blood LGE MRI before implantable cardioverter-defibrillator implantation or ablation therapy and who underwent 2D bright-blood LGE MRI within a time frame of 3 months, were prospectively included...
April 13, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37040659/functional-magnetic-resonance-spectroscopy-of-lactate-in-alzheimer-disease-a-comprehensive-review-of-alzheimer-disease-pathology-and-the-role-of-lactate
#12
JOURNAL ARTICLE
Kiarash Shirbandi, Reza Rikhtegar, Mohammad Khalafi, Mohammad Mirza Aghazadeh Attari, Farzaneh Rahmani, Pouya Javanmardi, Sajjad Iraji, Zahra Babaei Aghdam, Amir Mohammad Rezaei Rashnoudi
Functional 1H magnetic resonance spectroscopy (fMRS) is a derivative of dynamic MRS imaging. This modality links physiologic metabolic responses with available activity and measures absolute or relative concentrations of various metabolites. According to clinical evidence, the mitochondrial glycolysis pathway is disrupted in many nervous system disorders, especially Alzheimer disease, resulting in the activation of anaerobic glycolysis and an increased rate of lactate production. Our study evaluates fMRS with J-editing as a cutting-edge technique to detect lactate in Alzheimer disease...
April 11, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/37093700/functional-magnetic-resonance-spectroscopy-of-lactate-in-alzheimer-disease-a-comprehensive-review-of-alzheimer-disease-pathology-and-the-role-of-lactate
#13
JOURNAL ARTICLE
Kiarash Shirbandi, Reza Rikhtegar, Mohammad Khalafi, Mohammad Mirza Aghazadeh Attari, Farzaneh Rahmani, Pouya Javanmardi, Sajjad Iraji, Zahra Babaei Aghdam, Amir Mohammad Rezaei Rashnoudi
Functional 1H magnetic resonance spectroscopy (fMRS) is a derivative of dynamic MRS imaging. This modality links physiologic metabolic responses with available activity and measures absolute or relative concentrations of various metabolites. According to clinical evidence, the mitochondrial glycolysis pathway is disrupted in many nervous system disorders, especially Alzheimer disease, resulting in the activation of anaerobic glycolysis and an increased rate of lactate production. Our study evaluates fMRS with J-editing as a cutting-edge technique to detect lactate in Alzheimer disease...
April 1, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/36735623/phantom-less-nonlinear-magnetic-resonance-imaging-calibration-with-multiple-input-blood-flow-model
#14
JOURNAL ARTICLE
Tomoki Saka, Toshiyuki Gotoh, Seiichiro Kagei, Tae Iwasawa, Rogerio Y Takimoto, Marcos S G Tsuzuki
PURPOSE: Previous work used phantoms to calibrate the nonlinear relationship between the gadolinium contrast concentration and the intensity of the magnetic resonance imaging signal. This work proposes a new nonlinear calibration procedure without phantoms and considers the variation of contrast agent mass minimum combined with the multiple input blood flow system. This also proposes a new single-input method with meaningful variables that is not influenced by reperfusion or noise generated by aliasing...
February 1, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/36648166/from-mild-gait-difficulties-to-a-sudden-coma-a-rare-case-of-marchiafava-bignami-disease
#15
JOURNAL ARTICLE
Henri De Ryck, Sofie Van Cauter, Kim Bekelaar
In this case report we describe the case of a 66-year old man with subacute gait difficulties, with a progression to confusion coma with multiple generalised epileptic seizures during the following days. Biochemical analysis showed hyperglycaemia, cerebrospinal fluid (CSF) testing showed a mild lymphocytic pleocytosis and an elevated protein and lactate. Broad-spectrum antibiotics and antiviral therapy where initiated. However, all other CSF testing remained negative. Magnetic resonance imaging of the brain showed remarkably symmetric hyperintense T2 white matter lesions most noticable in the corpus callosum...
January 11, 2023: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/36469640/7t-small-animal-mri-research-for-hepatic-alveolar-echinococcosis
#16
JOURNAL ARTICLE
Guanmi Zhang, Yalin Mou, Haining Fan, Weixia Li, Yuntai Cao, Haihua Bao
OBJECTIVES: 7T small animal magnetic resonance imaging (MRI) was used to analyze the growth characteristics of hepatic alveolar echinococcosis (HAE). METHODS: A mouse model of HAE was established by intraperitoneal injection of alveolar Echinococcus tissue suspension. Ten mouse models successfully inoculated by ultrasound screening were selected. The mouse model was scanned with T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), and diffusion-weighted imaging (DWI) sequence by 7T small animal MRI...
December 1, 2022: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/36378902/bilateral-ovarian-endometriomas-a-case-report
#17
JOURNAL ARTICLE
Antonia M Pausch, Olivio F Donati, Andreas M Hötker
No abstract text is available yet for this article.
November 10, 2022: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/36305817/postmortem-diffusion-weighted-magnetic-resonance-imaging-of-the-brain-in-perinatal-death-an-animal-control-study-to-detect-the-influence-of-postmortem-interval
#18
JOURNAL ARTICLE
Maud P M Tijssen, Simon G F Robben, Willemijn M Klein, Paul A M Hofman
OBJECTIVES: Diffusion-weighted imaging may be useful as part of a postmortem magnetic resonance imaging protocol. However, apart from the effect of temperature on apparent diffusion coefficient (ADC), normal postmortem ADC changes can influence the interpretation. Therefore, this study was conducted to evaluate the correlation between normal ADC changes and postmortem intervals (PMIs) and develop a reference standard for postmortem changes after temperature correction. MATERIALS AND METHODS: Six premature lambs were scanned at different PMIs...
October 1, 2022: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/36122324/the-utility-of-vessel-wall-imaging-in-the-postulation-of-acute-ischemic-stroke-with-spontaneous-recanalization-pathophysiology
#19
JOURNAL ARTICLE
Mohamad Syafeeq Faeez Md Noh, Anna Misyail Abdul Rashid, Fan Kee Hoo, Norafida Bahari
Recent advances in technology, particularly in the field of magnetic resonance imaging, have brought forth new sequences, including vessel wall imaging (VWI). Traditionally, the workup for intracranial vascular pathology has always turned to luminal imaging using computed tomography angiography, magnetic resonance angiography, or digital subtraction angiography. Since its introduction, VWI has enabled researchers and practicing clinicians to better understand disease processes and manage patients to the best standard of care possible...
August 1, 2022: Topics in Magnetic Resonance Imaging: TMRI
https://read.qxmd.com/read/35767314/logistic-regression-based-model-is-more-efficient-than-u-net-model-for-reliable-whole-brain-magnetic-resonance-imaging-segmentation
#20
JOURNAL ARTICLE
Henry Dieckhaus, Rozanna Meijboom, Serhat Okar, Tianxia Wu, Prasanna Parvathaneni, Yair Mina, Siddharthan Chandran, Adam D Waldman, Daniel S Reich, Govind Nair
OBJECTIVES: Automated whole brain segmentation from magnetic resonance images is of great interest for the development of clinically relevant volumetric markers for various neurological diseases. Although deep learning methods have demonstrated remarkable potential in this area, they may perform poorly in nonoptimal conditions, such as limited training data availability. Manual whole brain segmentation is an incredibly tedious process, so minimizing the data set size required for training segmentation algorithms may be of wide interest...
June 1, 2022: Topics in Magnetic Resonance Imaging: TMRI
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