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Investigative Radiology December 2013

December 17, 2013 by
Current Technological Advances in Magnetic Resonance With Critical Impact for Clinical Diagnosis and Therapy [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology January 2014

January 2, 2014 by
The objective of this study was to evaluate the correlation between dynamic gadoxetic acidYenhanced magnetic resonance imaging parameters and specific uptake values (SUVs) derived from 18fluorodeoxyglucose (18F-FDG) and 68Ga-DOTA-Tyr(3)-octreotate (68Ga-DOTATATE) positron emission tomography/computed tomography (PET/CT) in patients with liver metastases of neuroendocrine neoplasms. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology February 2014

February 4, 2014 by
Objectives: For T2-weighted abdominal images, homogenous fat suppression (FS) is crucial for diagnosis, but inherent B0/B1 inhomogeneities at 7 T lead to inhomogeneous FS and to tissue signal loss for most techniques. Here, 4 different FS techniques for single-shot fast spin echo were compared, whereby the recently proposed time-interleaved acquisition of modes (TIAMO) was used for the imaging portion of the sequence to reduce B1 artifacts. [...]
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Investigative Radiology June 2014

June 4, 2014 by
Objectives: The purpose of this study was to compare the diagnostic accuracy of dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) as a single parameter to multiparametric (MP)MRI with 2 (DCE MRI and diffusionweighted imaging [DWI]) and 3 (DCE MRI, DWI, and 3-dimensional proton magnetic resonance spectroscopic imaging [3D 1H-MRSI]) parameters in breast cancer diagnosis. [...]
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Investigative Radiology July 2014

June 30, 2014 by
Objectives: The aims of this study were to investigate and validate quantitative susceptibility mapping (QSM) for lesional iron quantification in cerebral cavernous malformations (CCMs). [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology October 2014

September 30, 2014 by
Objectives: Dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) examinations of the kidneys provide quantitative information on renal perfusion and filtration. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology September 2014

August 27, 2014 by
The objective of this study was to demonstrate the feasibility of improving perceived acoustic comfort for a standard clinical magnetic resonance imaging protocol via gradient wave form optimization and validate parallel imaging as a means to achieve a further reduction of acoustic noise. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology May 2014

April 29, 2014 by
Objectives: The aim of this study was to achieve initial experience with nonY contrast-enhanced (ne) magnetic resonance angiography (MRA) of the lower leg arteries in patients with peripheral arterial occlusive disease (PAOD) at 7 T. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology November 2013

November 1, 2013 by
Quantitative Evaluation of Computed High b Value Diffusion-Weighted Magnetic Resonance Imaging of the Prostate [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology November 2014

November 1, 2014 by
The aim of this study was to compare single-slice and 3-dimensional (3D) analysis for magnetic resonance renography (plasma flow [FP], plasma volume [VP], and glomerular filtration rate [GFR]) and for dynamic contrast-enhanced magnetic resonance imaging (MRI) of renal tumors (FP, VP, permeability-surface area product), respectively. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology December 2014

December 2, 2014 by
The aim of this study was to compare single-slice and 3-dimensional (3D) analysis for magnetic resonance renography (plasma flow [FP], plasma volume [VP], and glomerular filtration rate [GFR]) and for dynamic contrast-enhanced magnetic resonance imaging (MRI) of renal tumors (FP, VP, permeability-surface area product), respectively. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology March 2015

March 1, 2015 by
The aim of this study was to compare single-slice and 3-dimensional (3D) analysis for magnetic resonance renography (plasma flow [FP], plasma volume [VP], and glomerular filtration rate [GFR]) and for dynamic contrast-enhanced magnetic resonance imaging (MRI) of renal tumors (FP, VP, permeability-surface area product), respectively. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology April 2015

March 30, 2015 by
Objectives:The purpose of this study was to explore the potential of non- Gaussian diffusion and perfusion magnetic resonance imaging (MRI) using intravoxel incoherent motion (IVIM) MRI for the diagnosis of breast lesions. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology December 2015

November 18, 2015 by
Objectives: The aim of this study was to determine a robust (sensitive and objective) method for analyzing renal blood oxygenation level-dependent magnetic resonance imaging data.evaluate whether magnetic resonance imaging (MRI) is effective as computed tomography (CT) in determining morphologic and functional pulmonary changes in patients with cystic fibrosis (CF) in association with multiple clinical parameters. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology August 2019

August 1, 2019 by
Objective: This study aims for targeted biopsy validation of magnetic resonance fingerprinting (MRF) and diffusion mapping for characterizing peripheral zone (PZ) prostate cancer and noncancers. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology December 2021

November 30, 2021 by
Respiratory binning of free-breathing magnetic resonance imaging data reduces motion blurring; however, it exacerbates noise and introduces severe artifacts due to undersampling. Deep neural networks can remove artifacts and noise but usually require high-quality ground truth images for training. This study aimed to develop a network that can be trained without this requirement. [...]
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Investigative Radiology November 2021

October 30, 2021 by
During the last decade, metal artifact reduction in magnetic resonance imaging (MRI) has been an area of intensive research and substantial improvement. The demand for an excellent diagnostic MRI scan quality of tissues around metal implants is closely linked to the steadily increasing number of joint arthroplasty (especially knee and hip arthroplasties) and spinal stabilization procedures [...]
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Investigative Radiology October 2021

October 2, 2021 by
Contrast-enhanced (CE) magnetic resonance imaging (MRI) is the most effective imaging modality for breast cancer detection. A contrast agent–free examination technique would be desirable for breastMRI screening. The purpose of this study was to evaluate the capability to detect and characterize suspicious breast lesions with an abbreviated, non–contrast-enhanced MRI protocol featuring ultra-high b-value diffusion-weighted imaging (DWI) compared with CE images [...]
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Investigative Radiology September 2021

September 11, 2021 by
Through-slice chemical shift artifacts in state-of-the-art turbo-spinecho (TSE) images can be significantly more severe at 7 T than at lower field strengths. In musculoskeletal applications, these artifacts appear similar to bone fractures or neoplastic bone marrow disease. The objective of this work was to explore and reduce through-slice chemical shift artifacts in 2-dimensional (2D) TSE imaging at 7 T. [...]
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Investigative Radiology August 2021

July 30, 2021 by
The aim of this study was to investigate the impact of a deep learning based superresolution reconstruction technique for T1-weighted volume-interpolated breath-hold examination (VIBESR) on image quality in comparison with standard VIBE images (VIBESD). [...]
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Investigative Radiology July 2021

July 2, 2021 by
The aim of this study was to investigate the impact of a novel edge enhancement and iterative denoising algorithm in 1.5-T T1-weighted dynamic contrast-enhanced (DCE) gradient echo (GRE) magnetic resonance imaging of the abdomen on image quality, noise levels, diagnostic confidence, and lesion detectability. [...]
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Investigative Radiology June 2021

June 1, 2021 by
The aim of this study was to investigate the impact of a novel iterative denoising and image enhancement technique in T1-weighted precontrast and postcontrast volume-interpolated breath-hold examination (VIBE) of the abdomen on image quality, noise levels, and diagnostic confidence without change of acquisition parameters. [...]
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Investigative Radiology May 2021

May 4, 2021 by
The aim of this study was to investigate the impact of a novel iterative denoising and image enhancement technique in T1-weighted precontrast and postcontrast volume-interpolated breath-hold examination (VIBE) of the abdomen on image quality, noise levels, and diagnostic confidence without change of acquisition parameters. [...]
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Investigative Radiology April 2021

April 2, 2021 by
The aim of this study was to quantify the spatial temperature rises that occur during 1.5- and 3.0-T magnetic resonance imaging (MRI) of different types of hip arthroplasty implants using different metal artifact reduction techniques. [...]
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Investigative Radiology March 2021

March 3, 2021 by
Quantitative synthetic magnetic resonance imaging (MRI) enables the determination of fundamental tissue properties, namely, T1 and T2 relaxation times and proton density (PD), in a single scan. Myelin estimation and brain segmentation based on these quantitative values can also be performed automatically. This study aimed to reveal the changes in tissue characteristics and volumes of the brain according to age and provide age-specific reference values obtained by quantitative synthetic MRI. [...]
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Investigative Radiology February 2021

February 1, 2021 by
Ultra-high field magnetic resonance imaging (MRI) (≥7 T) is a unique opportunity to improve the clinical diagnosis of brain pathologies, such as multiple sclerosis or focal epilepsy. However, several shortcomings of 7 T MRI, such as radiofrequency field in homogeneities, could degrade image quality and hinder radiological interpretation. To address these challenges, an original synthetic MRI method based on T1 mapping achieved with the magnetization-prepared 2 rapid acquisition gradient echo (MP2RAGE) sequence was developed. The radiological quality of on-demand T1-based contrasts generated by this technique was evaluated in multiple sclerosis and focal epilepsy imaging at 7 T. [...]
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Investigative Radiology January 2021

December 26, 2020 by
Quantitative magnetic resonance imaging (MRI) is a long-standing challenge. We advocate that the origin of the problemis the simplification applied in commonly used models of the MRI signal relation to the target parameters of biological tissues. Two research fields are briefly reviewed as ways to respond to the challenge of quantitative MRI, both experiencing an exponential growth right now. Microstructure MRI strives to build physiology-based models from cells to signal and, given the signal, back to the cells again. Magnetic resonance fingerprinting aims at efficient simultaneous determination of multiple signal parameters. The synergy of these yet disjoined approaches promises truly quantitative MRI with specific target-oriented diagnostic tools rather than universal imaging methods [...]
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Investigative Radiology December 2020

December 2, 2020 by
New next-generation low-field magnetic resonance imaging systems (operating in the range of 0.5 T) hold great potential for increasing access to clinical diagnosis and needed health care both in developed countries and worldwide. The relevant history concerning the choice of field strength, which resulted in 1.5 T still dominating today the number of installed systems, is considered, together with design advances possible because of interval developments, since low field was considered for clinical use in the 1980s, and current research. The potential impact of low-cost, advanced-generation low-field magnetic resonance imaging systems, properly designed, is high in terms of further dissemination of health care—across the gamut from industrial to developing countries—regardless of disease entity and anatomic region of involvement, with major niche applications likely as well. [...]
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Investigative Radiology November 2020

October 30, 2020 by
T2 mapping of the intervertebral disc (IVD) can depict quantitative changes reflecting biochemical change due to loss of glycosaminoglycan content. Conventional T2 mapping is usually performed using a 2-dimensional multiecho-spin echo sequence (2D-MESE) with long acquisition times that are generally not compatible with clinical routine. This study investigates the applicability of GRAPPATINI, a T2 mapping sequence combining undersampling, model-based reconstruction, and parallel imaging, to offer clinically feasible acquisition times in T2 mapping of the lumbar IVD. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology October 2020

September 1, 2020 by
Gadolinium deposition is widely believed to occur, but questions regarding accumulation pattern and permanence remain.We conducted a retrospective study of intracranial signal changes on monthly triple-dose contrast-enhanced magnetic resonance imaging (MRI) examinations from the previously published Betaseron vs. Copaxone in Multiple Sclerosis With Triple-Dose Gadolinium and 3-Tesla MRI Endpoints Trial (N = 67) to characterize the dynamics of gadolinium deposition in several deep brain nuclei and track persistence versuswashout of gadolinium deposition on long-term follow-up (LTFU) examinations (N = 28) obtained approximately 10 years after enrollment in the Betaseron vs. Copaxone inMultiple Sclerosis With Triple-Dose Gadolinium and 3-Tesla MRI Endpoints Trial. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology August 2020

August 6, 2020 by
The purpose of this study was to assess the technical feasibility of 3-dimensional (3D) super-resolution reconstruction (SRR) of 2D turbo spin echo (TSE) knee magnetic resonance imaging (MRI) and to compare its image quality with conventional 3D TSE sampling perfection with application optimized contrast using different flip angle evolutions (SPACE) MRI. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology July 2020

June 28, 2020 by
Several articles have investigated potential of sodium (23Na) magnetic resonance imaging (MRI) for the in vivo evaluation of cartilage health, but so far no study tested its feasibility for the evaluation of focal cartilage lesions of grade 1 or 2 as defined by the International Cartilage Repair Society. The aims of this study were to evaluate the ability of 23Na-MRI to differentiate between early focal lesions and normal-appearing cartilage, to evaluate within-subject reproducibility of 23Na-MRI, and to monitor longitudinal changes in participants with low-grade, focal chondral lesions. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology June 2020

June 2, 2020 by
The aim of this study was to test the hypothesis that clinically used magnetic resonance (MR)–conditional needles of varying lengths, orientations, locations, and pulse sequences can result in excessive heating during MR imaging (MRI)–guided interventions that can be minimized to physiological ranges with proper selection of the needle length, needle position, and modification of pulse sequence parameters. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology May 2020

May 4, 2020 by
The aim of this study was to evaluate the performance of an automated workflow for multiparametric magnetic resonance imaging (mpMRI) of the prostate compared with a manual mpMRI workflow. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology April 2020

April 2, 2020 by
The aim of this study was to develop a method for tracking respiratory motion throughout full MR or PET/MR studies that requires only minimal additional hardware and no modifications to the sequences [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology March 2020

March 3, 2020 by
The aim of this study was to develop a method for tracking respiratory motion throughout full MR or PET/MR studies that requires only minimal additional hardware and no modifications to the sequences [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology February 2020

February 11, 2020 by
The aim of this study was to investigate diagnostic accuracy and impact on patient management of an ultrafast (4:33 minutes/5 sequences) brain magnetic resonance imaging (MRI) protocol for the detection of intracranial pathologies in acute neurological emergencies. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology January 2020

January 3, 2020 by
The aim of this study was to demonstrate the feasibility of hepatic perfusion imaging using dynamic contrast-enhanced (DCE) golden-angle radial sparse parallel (GRASP) magnetic resonance imaging (MRI) for characterizing liver parenchyma and hepatocellular carcinoma (HCC) before and after transarterial chemoembolization (TACE) as a potential alternative to volume perfusion computed tomography (VPCT). [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology December 2019

November 27, 2019 by
The aim of this study was to retrospectively compare optimized respiratory-triggered diffusion-weighted imaging with simultaneous multislice acceleration (SMS-RT-DWI) of the liver with a standard free-breathing echoplanar DWI (s-DWI) protocol at 3 Twith respect to the imaging artifacts inherent to DWI. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology November 2019

November 1, 2019 by
Objective: The aim of this study was to compare a compressed-sensing free-breathing VIBE (fbVIBE) with a conventional breath-hold VIBE (bhVIBE) for dynamic contrast-enhanced imaging of the upper abdomen. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology October 2019

October 2, 2019 by
Objective: The aim of this study was to noninvasively evaluate changes in renal stiffness, diffusion, and oxygenation in patients with chronic, advanced stage immunoglobulin A nephropathy (IgAN) by multiparametric magnetic resonance imaging using tomoelastography, diffusion-weighted imaging (DWI), and blood oxygen level–dependent (BOLD) imaging. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology September 2019

September 3, 2019 by
Objective: Gadolinium-based contrast agents (GBCAs) have become an integral part in daily clinical decision making in the last 3 decades. However, there is a broad consensus that GBCAs should be exclusively used if no contrast-free magnetic resonance imaging (MRI) technique is available to reduce the amount of applied GBCAs in patients. In the current study, we investigate the possibility of predicting contrast enhancement from noncontrast multiparametric brain MRI scans using a deep-learning (DL) architecture. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology August 2019

July 15, 2019 by
Objective: This study aims for targeted biopsy validation of magnetic resonance fingerprinting (MRF) and diffusion mapping for characterizing peripheral zone (PZ) prostate cancer and noncancers. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology July 2019

July 13, 2019 by
Abstract: Recent innovations in magnetic resonance, involving both hardware and software, that effectively deal with motion—whether inadvertent on the part of the patient or due to respiration and cardiac contraction—are reviewed, emphasizing major current advances. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology June 2019

April 29, 2019 by
Objective: The aim of the study was to determine the quantitative T2 values in prostate tissue and evaluate them for detection and grading of prostate cancer. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology April 2019

April 1, 2019 by
Objective: The aim of the study was to determine the quantitative T2 values in prostate tissue and evaluate them for detection and grading of prostate cancer. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology March 2019

March 1, 2019 by
Objective: The aim of the study was to determine the quantitative T2 values in prostate tissue and evaluate them for detection and grading of prostate cancer. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology February 2019

January 31, 2019 by
Objective: The aims of this study were to identify higher-grade clear cell renal cell carcinoma (cRCC)with native T1 mapping and to histologically correlate the results with the collagen volume fraction. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology January 2019

January 10, 2019 by
Objective: The purpose of this study was to identify an optimal imaging protocol for metal artifact reduced magnetic resonance imaging by application of different imaging and postprocessing parameters in compressed sensing slice-encoding for metal artifact correction (CS-SEMAC) and to test it in patients with total hip arthroplasty (THA). [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology December 2018

November 6, 2018 by
Objective: High-resolution T2-weighted sequences are frequently used in magnetic resonance imaging (MRI) studies to assess the cerebellopontine angle and internal auditory canal (IAC) in sensorineural hearing loss patients but have low yield and lengthened examinations. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology October 2018

October 1, 2018 by
Objective: The aim of this study was to evaluate the feasibility of a prototype volume-interpolated breath-hold examination (VIBE) sequence using compressed sensing (VIBECS) for rapidmultiphase arterialmagnetic resonance imaging (MRI) at different temporal resolution during free-breathing in comparison with a conventional breath-hold approach (VIBESTD). [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology September 2018

July 11, 2018 by
Objective: The aim of this study was to evaluate the performance of an automated workflow for whole-body magnetic resonance imaging (WB-MRI), which reduces user interaction compared with the manual WB-MRI workflow.3 T [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology August 2018

September 1, 2018 by
Objective: The aim of this study was to evaluate the performance of an automated workflow for whole-body magnetic resonance imaging (WB-MRI), which reduces user interaction compared with the manual WB-MRI workflow. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology July 2018

July 2, 2018 by
Objective:The aim of this study was to explore the feasibility of magnetic resonance elastography (MRE) for characterizing indeterminate small renal tumors (SRTs) as part of a multiparametric magnetic resonance (MR) imaging protocol. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology June 2018

June 4, 2018 by
Objective:The aim of this study was to explore the feasibility of magnetic resonance elastography (MRE) for characterizing indeterminate small renal tumors (SRTs) as part of a multiparametric magnetic resonance (MR) imaging protocol. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology May 2018

May 2, 2018 by
Objective: In this study, we present a fully automated and robust self-navigated approach to obtain 4-dimensional (4-D) motion-resolved images during free breathing. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology April 2018

April 2, 2018 by
Objective: The aim of this study was to assess the potential of noncontrast magnetic resonance imaging (NC-MRI) with diffusion-weighted imaging (DWI) in characterization of breast lesions in comparison to dynamic contrast-enhanced MRI (DCE-MRI) at 3 T. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology March 2018

March 5, 2018 by
Objective: The aims of this study were to prospectively evaluate image quality, duct visibility, and diagnostic performance in duct-related pathologies of compressedsensing (CS) accelerated 3-dimensional (3D) magnetic resonance cholangiopancreatography (MRCP) prototype protocols and compare these with those of conventional 3D MRCP protocol in patients with suspected pancreatic diseases. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology Febuary 2018

February 6, 2018 by
Objective: The aim of this study was to correlate magnetic resonance imaging (MRI) of castration-resistant prostate cancer (CRPC) bone metastases with histological and molecular features of bone metastases. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology January 2018

September 12, 2017 by
Objective: Free-breathing real-time (RT) imaging can be used in patients with difficulty in breath-holding; however, RT cine imaging typically experiences poor image quality compared with segmented cine imaging because of low resolution. Here, we validate a novel unsupervised motion-corrected (MOCO) reconstruction technique for free-breathing RT cardiac images, called MOCO-RT. Motioncorrected RT uses elastic image registration to generate a single heartbeat of high-quality data from a free-breathing RT acquisition. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology August 2017

July 3, 2017 by
Objective: The aim of this study was to evaluate the reproducibility of 3 T magnetic resonance imaging diffusion tensor imaging (DTI) of the brachial plexus in healthy subjects. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology June 2017

June 12, 2017 by
Objective: The aim of this study was to compare the degree of artifact reduction in magnetic resonance imaging achieved with slice encoding for metal artifact correction (SEMAC) in combination with view angle tilting (VAT) and multiacquisition variable resonance image combination (MAVRIC) for standard contrast weightings and different metallic materials. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology May 2017

April 12, 2017 by
Objective: The aimof this study was to study focal cerebellar pathology in early stages of multiple sclerosis (MS) using ultra-high-field magnetization-prepared 2 inversion-contrast rapid gradient-echo (7T MP2RAGE). [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology March 2017

February 3, 2017 by
Objective: The aims of this study were to implement a protocol for simultaneous multislice (SMS) accelerated diffusion-weighted imaging (DWI) of the kidneys and to perform a systematic analysis of image quality of the data sets. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology January 2017

December 2, 2016 by
Abstract: The relevant clinical accelerated magnetic resonance techniques that are available currently for routine patient examinations are reviewed, presenting and discussing the benefits therein when compared with more conventional scans. The focus is on clinical use and practicality, with the review divided into 3 sections. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology November 2016

November 2, 2016 by
Objective: The purpose of the present study was to evaluate a recently introduced technique for free-breathing dynamic contrast-enhanced renal magnetic resonance imaging (MRI) applying a combination of radial k-space sampling, parallel imaging, and compressed sensing. The technique allows retrospective reconstruction of 2 motion-suppressed sets of images from the same acquisition: one with lower temporal resolution but improved image quality for subjective image analysis, and one with high temporal resolution for quantitative perfusion analysis. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology October 2016

October 3, 2016 by
Objective: The aim of this study was to prospectively test the hypothesis that a compressed sensing–based slice encoding for metal artifact correction (SEMAC) turbo spin echo (TSE) pulse sequence prototype facilitates high-resolution metal artifact reduction magnetic resonance imaging (MRI) of cobalt-chromium knee arthroplasty implants within acquisition times of less than 5 minutes, thereby yielding better image quality than high-bandwidth (BW) TSE of similar length and similar image quality than lengthier SEMAC standard of reference pulse sequences. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology September 2016

September 6, 2016 by
Objective: The aims of this study were to evaluate morphological and quantitative 7 T magnetic resonance imaging (MRI) hip sequences in patients after acetabular cartilage transplantation and to compare image quality with 3 T MRI. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology August 2016

August 8, 2016 by
Objective: The aim of this study was to compare quantitative and semiquantitative parameters (signal-to-noise ratio [SNR], contrast-to-noise ratio [CNR], image quality, diagnostic confidence) from a standard brain magnetic resonance imaging examination encompassing common neurological disorders such as demyelinating disease, gliomas, cerebrovascular disease, and epilepsy, with comparable sequence protocols and acquisition times at 3 T and at 7 T. [...]
Filed Under: Articles, Clinical Imaging

Investigative Radiology July 2016

July 1, 2016 by
Objective: The aim of this study was to assess whether a short breath-hold technique can improve hepatic arterial phase (HAP) image quality in gadoxetic acid–enhanced magnetic resonance (MR) imaging compared with a conventional long breath-hold technique. [...]
Filed Under: Articles, Clinical Imaging