LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 10

Search options

  1. Article ; Online: Routine 3D magnetic resonance imaging of joints.

    Kijowski, Richard / Gold, Garry E

    Journal of magnetic resonance imaging : JMRI

    2011  Volume 33, Issue 4, Page(s) 758–771

    Abstract: ... performed using 2D fast spin-echo sequences. However, 3D sequences have also been used for joint imaging and ... Due to its high spatial resolution and excellent tissue contrast, magnetic resonance imaging (MRI ... has become the most commonly used imaging method to evaluate joints. Most musculoskeletal MRI is ...

    Abstract Due to its high spatial resolution and excellent tissue contrast, magnetic resonance imaging (MRI) has become the most commonly used imaging method to evaluate joints. Most musculoskeletal MRI is performed using 2D fast spin-echo sequences. However, 3D sequences have also been used for joint imaging and have the advantage of acquiring thin continuous slices through joints, which reduces the effects of partial volume averaging. With recent advances in MR technology, 3D sequences with isotropic resolution have been developed. These sequences allow high-quality multiplanar reformat images to be obtained following a single acquisition, thereby eliminating the need to repeat sequences with identical tissue contrast in different planes. Preliminary results on the diagnostic performance of 3D isotropic resolution sequences are encouraging. However, additional studies are needed to determine whether these sequences can replace currently used 2D fast spin-echo sequences for providing comprehensive joint assessment in clinical practice.
    MeSH term(s) Adult ; Ankle Joint/pathology ; Cartilage/pathology ; Diagnostic Imaging/methods ; Elbow Joint/pathology ; Female ; Hip Joint/pathology ; Humans ; Image Processing, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Joints/pathology ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged ; Sensitivity and Specificity ; Shoulder Joint/pathology
    Language English
    Publishing date 2011-03-29
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1146614-5
    ISSN 1522-2586 ; 1053-1807
    ISSN (online) 1522-2586
    ISSN 1053-1807
    DOI 10.1002/jmri.22342
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Syn_SegNet: A Joint Deep Neural Network for Ultrahigh-Field 7T MRI Synthesis and Hippocampal Subfield Segmentation in Routine 3T MRI.

    Li, Xinwei / Wang, Linjin / Liu, Hong / Ma, Baoqiang / Chu, Lei / Dong, Xiaoxi / Zeng, Debin / Che, Tongtong / Jiang, Xiaoming / Wang, Wei / Hu, Jun / Li, Shuyu

    IEEE journal of biomedical and health informatics

    2023  Volume 27, Issue 10, Page(s) 4866–4877

    Abstract: ... a variant of 3D-U-Net with multiscale deep supervision as the segmentation subnetwork, incorporating ... multitask joint deep neural network that leverages ultrahigh-field 7T MRI synthesis to improve hippocampal ... in routine 3T MRI is challenging due to their complex morphology and small size, as well as the limited ...

    Abstract Precise delineation of hippocampus subfields is crucial for the identification and management of various neurological and psychiatric disorders. However, segmenting these subfields automatically in routine 3T MRI is challenging due to their complex morphology and small size, as well as the limited signal contrast and resolution of the 3T images. This research proposes Syn_SegNet, an end-to-end, multitask joint deep neural network that leverages ultrahigh-field 7T MRI synthesis to improve hippocampal subfield segmentation in 3T MRI. Our approach involves two key components. First, we employ a modified Pix2PixGAN as the synthesis model, incorporating self-attention modules, image and feature matching loss, and ROI loss to generate high-quality 7T-like MRI around the hippocampal region. Second, we utilize a variant of 3D-U-Net with multiscale deep supervision as the segmentation subnetwork, incorporating an anatomic weighted cross-entropy loss that capitalizes on prior anatomical knowledge. We evaluate our method on hippocampal subfield segmentation in paired 3T MRI and 7T MRI with seven different anatomical structures. The experimental findings demonstrate that Syn_SegNet's segmentation performance benefits from integrating synthetic 7T data in an online manner and is superior to competing methods. Furthermore, we assess the generalizability of the proposed approach using a publicly accessible 3T MRI dataset. The developed method would be an efficient tool for segmenting hippocampal subfields in routine clinical 3T MRI.
    MeSH term(s) Humans ; Hippocampus/diagnostic imaging ; Neural Networks, Computer ; Magnetic Resonance Imaging/methods ; Mental Disorders ; Image Processing, Computer-Assisted/methods
    Language English
    Publishing date 2023-10-05
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2695320-1
    ISSN 2168-2208 ; 2168-2194
    ISSN (online) 2168-2208
    ISSN 2168-2194
    DOI 10.1109/JBHI.2023.3305377
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Simultaneous super-resolution and contrast synthesis of routine clinical magnetic resonance images of the knee for improving automatic segmentation of joint cartilage: data from the Osteoarthritis Initiative.

    Neubert, Aleš / Bourgeat, Pierrick / Wood, Jason / Engstrom, Craig / Chandra, Shekhar S / Crozier, Stuart / Fripp, Jurgen

    Medical physics

    2020  Volume 47, Issue 10, Page(s) 4939–4948

    Abstract: Purpose: High resolution three-dimensional (3D) magnetic resonance (MR) images are well suited ... synthetic 3D MR (syn3D-DESS) images with better contrast and higher spatial resolution from routine, low ... for automated cartilage segmentation in the human knee joint. However, volumetric scans such as 3D Double-Echo ...

    Abstract Purpose: High resolution three-dimensional (3D) magnetic resonance (MR) images are well suited for automated cartilage segmentation in the human knee joint. However, volumetric scans such as 3D Double-Echo Steady-State (DESS) images are not routinely acquired in clinical practice which limits opportunities for reliable cartilage segmentation using (fully) automated algorithms. In this work, a method for generating synthetic 3D MR (syn3D-DESS) images with better contrast and higher spatial resolution from routine, low resolution, two-dimensional (2D) Turbo-Spin Echo (TSE) clinical knee scans is proposed.
    Methods: A UNet convolutional neural network is employed for synthesizing enhanced artificial MR images suitable for automated knee cartilage segmentation. Training of the model was performed on a large, publically available dataset from the OAI, consisting of 578 MR examinations of knee joints from 102 healthy individuals and patients with knee osteoarthritis.
    Results: The generated synthetic images have higher spatial resolution and better tissue contrast than the original 2D TSE, which allow high quality automated 3D segmentations of the cartilage. The proposed approach was evaluated on a separate set of MR images from 88 subjects with manual cartilage segmentations. It provided a significant improvement in automated segmentation of knee cartilages when using the syn3D-DESS images compared to the original 2D TSE images.
    Conclusion: The proposed method can successfully synthesize 3D DESS images from 2D TSE images to provide images suitable for automated cartilage segmentation.
    MeSH term(s) Cartilage, Articular/diagnostic imaging ; Humans ; Imaging, Three-Dimensional ; Knee/diagnostic imaging ; Knee Joint/diagnostic imaging ; Magnetic Resonance Imaging ; Osteoarthritis, Knee/diagnostic imaging
    Language English
    Publishing date 2020-08-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 188780-4
    ISSN 2473-4209 ; 0094-2405
    ISSN (online) 2473-4209
    ISSN 0094-2405
    DOI 10.1002/mp.14421
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Validation of an MRI Protocol for Routine Quantitative Assessment of Tunnel Position in Anterior Cruciate Ligament Reconstruction.

    Grasso, Samuel / Linklater, James / Li, Qing / Parker, David A

    The American journal of sports medicine

    2018  Volume 46, Issue 7, Page(s) 1624–1631

    Abstract: ... reconstruction (ACLR) through a single imaging modality. Advances in magnetic resonance imaging (MRI) technology ... and 3D-CT per the imaging protocols of the Sydney Orthopaedic Research Institute ... 3D-CT) for standardized assessment of bone tunnel placement in ACLR, as a component of assessing ACLR ...

    Abstract Background: No standardized methodology and objective criteria currently exist to accurately and objectively assess tunnel placement and consequent graft orientation in anterior cruciate ligament (ACL) reconstruction (ACLR) through a single imaging modality. Advances in magnetic resonance imaging (MRI) technology have enabled the use of volumetric high spatial and contrast resolution proton density-weighted sequencing, which allows precise delineation of graft orientation, tunnel position, and quantitative assessment of tunnel position relationship to adjacent reproducible anatomic landmarks.
    Purpose: To establish an MRI protocol that would provide an accurate alternative to 3-dimensional computed tomography (3D-CT) for standardized assessment of bone tunnel placement in ACLR, as a component of assessing ACLR outcomes and to assist in presurgical planning for revision ACLR.
    Study design: Cohort study (diagnosis); Level of evidence, 2.
    Methods: Twenty-four participants diagnosed with a failed ACLR underwent MRI and 3D-CT per the imaging protocols of the Sydney Orthopaedic Research Institute, in which the acquired data were converted to 3D models. The bone tunnels of the previous ACLR were then intraoperatively digitized at the tunnel aperture and along the length of the tunnel (barrel) and used as the reference standard to evaluate the accuracy of high-resolution MRI and 3D-CT. Differences in geometry between the image-based model and the reference point cloud were calculated through point-to-point comparison.
    Results: At the tunnel apertures, no significant differences were detected between the MRI and 3D-CT models versus the reference models for the femur ( P = .9472) and tibia ( P = .5779). Mean ± SD tunnel barrel deviations between MRI and 3D-CT were 0.48 ± 0.28 mm (femur) and 0.46 ± 0.27 mm (tibia). No significant differences were detected between the MRI and 3D-CT models versus the reference models for the femoral ( P = .5730) and tibial ( P = .3002) tunnel barrels.
    Conclusion: This study demonstrated that, in addition to being the optimum modality for assessment of soft tissue injury of the knee, a high-resolution 3D turbo spin echo proton density sequence can provide an accurate assessment of tunnel placement, without the use of ionizing radiation. Therefore, this protocol provides the foundation for an objective standardized platform to quantitatively evaluate the location of ACL bone tunnels and graft orientation for routine postoperative assessment, presurgical planning, and evaluation of clinical outcomes.
    MeSH term(s) Adult ; Anterior Cruciate Ligament/diagnostic imaging ; Anterior Cruciate Ligament/surgery ; Anterior Cruciate Ligament Injuries/surgery ; Anterior Cruciate Ligament Reconstruction ; Cohort Studies ; Female ; Femur/diagnostic imaging ; Humans ; Knee Joint/diagnostic imaging ; Magnetic Resonance Imaging/methods ; Male ; Postoperative Period ; Tibia/diagnostic imaging ; Tomography, X-Ray Computed ; Young Adult
    Language English
    Publishing date 2018-03-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Validation Studies
    ZDB-ID 197482-8
    ISSN 1552-3365 ; 0363-5465
    ISSN (online) 1552-3365
    ISSN 0363-5465
    DOI 10.1177/0363546518758950
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Evaluation of an accelerated 3D modulated flip-angle technique in refocused imaging with an extended echo-train sequence with compressed sensing for imaging of the knee: comparison with routine 2D MRI sequences.

    Li, G / Wu, D / Xu, Z / Zuo, X / Li, X / Chang, S / Dai, Y

    Clinical radiology

    2020  Volume 76, Issue 2, Page(s) 158.e13–158.e18

    Abstract: ... 2D FSE, and PD sequences were acquired from 68 participants using 3 T magnetic resonance imaging (MRI ... Aim: To accelerate the acquisition of high-resolution magnetic resonance imaging (MRI) by using ... significantly between the 3D matrix sequence and routine 2D sequences.: Conclusions: 3D matrix reduced ...

    Abstract Aim: To accelerate the acquisition of high-resolution magnetic resonance imaging (MRI) by using the three-dimensional (3D) matrix sequence with compressed sensing and to compare it with conventional two-dimensional (2D) proton-density (PD) and fast spin-echo (FSE) sequences.
    Materials and methods: 3D matrix, 2D FSE, and PD sequences were acquired from 68 participants using 3 T magnetic resonance imaging (MRI). Two radiologists scored image quality independently on a four-point scale. The structural similarity index (SSIM), and signal- (SNRs) and contrast-to-noise ratios (CNRs) of different anatomical structures of the knee were assessed and compared between sequences using Wilcoxon signed-rank tests and Cohen's kappa.
    Results: The median acquisition time reduction was 44.5%. There was a substantial to perfect agreement for the rating between the 3D matrix FSE and 2D FSE or PD sequences when evaluating cartilage, subchondral bone, and ligaments (κ=0.783-872, p>0.05). The mean SSIM values between the 3D matrix FSE and 2D FSE, and between the 3D matrix PD and 2D PD sequences was 0.994 and 0.971, respectively, which are acceptable. No significant differences were found in SNR between the 3D matrix FSE and 2D FSE, and between the 3D matrix PD and 2D PD sequences, even though the SNR appeared to be higher on routine 2D sequences. The CNR of subchondral bone-meniscus, subchondral bone-joint fluid, and meniscus-joint fluid did not differentiate significantly between the 3D matrix sequence and routine 2D sequences.
    Conclusions: 3D matrix reduced the acquisition time in routine clinical knee MRI without the loss in image quality, SNR, and CNR.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Image Interpretation, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Joint Diseases/diagnostic imaging ; Knee Joint/diagnostic imaging ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged ; Sensitivity and Specificity
    Language English
    Publishing date 2020-11-27
    Publishing country England
    Document type Comparative Study ; Journal Article
    ZDB-ID 391227-9
    ISSN 1365-229X ; 0009-9260
    ISSN (online) 1365-229X
    ISSN 0009-9260
    DOI 10.1016/j.crad.2020.10.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Advanced Imaging Techniques in the Knee: Benefits and Limitations of New Rapid Acquisition Strategies for Routine Knee MRI.

    Garwood, Elisabeth R / Recht, Michael P / White, Lawrence M

    AJR. American journal of roentgenology

    2017  Volume 209, Issue 3, Page(s) 552–560

    Abstract: ... reviewed include 3D fast spin-echo imaging as well as new approaches to rapid image acquisition techniques ... parallel imaging, compressed sensing, simultaneous multislice, and neural network reconstruction techniques ... that can be used to accelerate acquisition times in routine knee MRI.: Conclusion: Specific techniques ...

    Abstract Objective: The purpose of this article is to review current and emerging techniques and strategies that can be used to accelerate acquisition times in routine knee MRI.
    Conclusion: Specific techniques reviewed include 3D fast spin-echo imaging as well as new approaches to rapid image acquisition techniques (parallel imaging, compressed sensing, simultaneous multislice, and neural network reconstruction techniques) and their potential application to knee MRI.
    MeSH term(s) Contrast Media ; Humans ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Joint Diseases/diagnostic imaging ; Joint Diseases/pathology ; Knee Injuries/diagnostic imaging ; Knee Injuries/pathology ; Knee Joint/diagnostic imaging ; Knee Joint/pathology ; Magnetic Resonance Imaging/methods
    Chemical Substances Contrast Media
    Language English
    Publishing date 2017-09
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/AJR.17.18228
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Clinical usefulness of adding 3D cartilage imaging sequences to a routine knee MR protocol.

    Kijowski, Richard / Blankenbaker, Donna G / Woods, Michael / Del Rio, Alejandro Munoz / De Smet, Arthur A / Reeder, Scott B

    AJR. American journal of roentgenology

    2011  Volume 196, Issue 1, Page(s) 159–167

    Abstract: ... with IDEAL-SPGR or with IDEAL-GRASS.: Conclusion: Adding 3D sequences to a routine MR protocol improves ... the diagnostic performance of a routine MR protocol for detecting cartilage lesions within the knee joint at 3 T ... to grade each articular surface of the knee joint; during the second review, the routine MR protocol was ...

    Abstract Objective: The objective of our study was to determine whether 3D sequences can improve the diagnostic performance of a routine MR protocol for detecting cartilage lesions within the knee joint at 3 T.
    Subjects and methods: An iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) spoiled gradient-recalled echo (SPGR) sequence (n = 75 patients) or an IDEAL gradient-recalled acquisition in a steady state (GRASS) sequence (n = 75 patients) was added to routine 3-T knee MR protocol to examine 150 patients who subsequently underwent arthroscopic knee surgery. Each articular surface of the knee joint was graded at arthroscopy. All MR examinations were independently reviewed twice by two musculoskeletal radiologists. During the first review, the routine MR protocol was used alone to grade each articular surface of the knee joint; during the second review, the routine MR protocol was used with IDEAL-SPGR or IDEAL-GRASS. Using arthroscopy as the reference standard, the sensitivity and specificity for detecting cartilage lesions and the proportion of correctly graded cartilage lesions were determined for the routine MR protocol alone and for the routine MR protocol with IDEAL-SPGR or IDEAL-GRASS. The McNemar test was used to compare sensitivity, specificity, and accuracy values and proportions of correctly graded cartilage lesions.
    Results: There was a statistically significant improvement in the specificity (p < 0.05) but not the sensitivity (p = 0.08-0.32) for detecting cartilage lesions when using the routine MR protocol with IDEAL-SPGR or IDEAL-GRASS. There was also a statistically significant (p < 0.05) improvement in the proportion of correctly graded cartilage lesions when using the routine MR protocol with IDEAL-SPGR or with IDEAL-GRASS.
    Conclusion: Adding 3D sequences to a routine MR protocol improves the diagnostic performance for detecting cartilage lesions within the knee joint at 3 T.
    MeSH term(s) Adolescent ; Adult ; Aged ; Arthroscopy ; Cartilage, Articular/injuries ; Female ; Humans ; Image Interpretation, Computer-Assisted ; Imaging, Three-Dimensional ; Knee Injuries/diagnosis ; Knee Injuries/surgery ; Least-Squares Analysis ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged ; Sensitivity and Specificity
    Language English
    Publishing date 2011-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/AJR.09.4095
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Three-dimensional turbo spin-echo magnetic resonance imaging (MRI) and semiquantitative assessment of knee osteoarthritis: comparison with two-dimensional routine MRI.

    Crema, M D / Nogueira-Barbosa, M H / Roemer, F W / Marra, M D / Niu, J / Chagas-Neto, F A / Gregio-Junior, E / Guermazi, A

    Osteoarthritis and cartilage

    2013  Volume 21, Issue 3, Page(s) 428–433

    Abstract: ... magnetic resonance imaging (MRI) for semiquantitative assessment of knee OA.: Materials and method: Twenty subjects ... Magnetic Resonance Imaging Score (WORMS) system. Agreement was determined using weighted kappa statistics and percentage ... accuracy when compared to routine 2D TSE MRI. 3D TSE MRI also takes less time, which is important for large ...

    Abstract Purpose: The aim of this study was to evaluate three-dimensional (3D) turbo spin-echo (TSE) magnetic resonance imaging (MRI) for semiquantitative assessment of knee OA.
    Materials and method: Twenty subjects fulfilling the American College of Rheumatology clinical criteria of knee OA underwent both two-dimensional (2D) and 3D MRIs on the same day. The 2D MRI protocol included triplanar fat-suppressed (FS) intermediate-weighted (Iw) TSE. For the 3D TSE technique, a sagittal FS Iw sequence was acquired and triplanar reformations were constructed. 2D and 3D MRIs were read separately by two radiologists using the Whole-Organ Magnetic Resonance Imaging Score (WORMS) system. Agreement was determined using weighted kappa statistics and percentage of overall agreement. The diagnostic performance of WORMS readings using 3D TSE MRI to detect the presence or absence of features was assessed using readings from 2D TSE images as a reference.
    Results: Agreement for the scored features ranged between 0.62 (osteophytes (OS)) and 0.94 (meniscal extrusion). The sensitivity of WORMS readings using the 3D TSE technique ranged between 80% (periarticular cysts) and 100% (several features), the specificity ranged between 62.3% (OS) and 100% (several features), and accuracy ranged between 77.2% (OS) and 99.3% (subchondral cysts).
    Conclusions: Semiquantitative assessment of knee OA can be reliably performed using 3D TSE MRI, showing substantial to almost perfect agreement and high accuracy when compared to routine 2D TSE MRI. 3D TSE MRI also takes less time, which is important for large OA studies.
    MeSH term(s) Aged ; Female ; Humans ; Imaging, Three-Dimensional/methods ; Knee Joint/pathology ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged ; Osteoarthritis, Knee/diagnosis ; Sensitivity and Specificity
    Language English
    Publishing date 2013-03
    Publishing country England
    Document type Comparative Study ; Evaluation Studies ; Journal Article
    ZDB-ID 1167809-4
    ISSN 1522-9653 ; 1063-4584
    ISSN (online) 1522-9653
    ISSN 1063-4584
    DOI 10.1016/j.joca.2012.12.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Clinical value of routine use of thin-section 3D MRI using 3D FSE sequences with a variable flip angle technique for internal derangements of the knee joint at 3T.

    Kudo, Hideyasu / Inaoka, Tsutomu / Kitamura, Noriko / Nakatsuka, Tomoya / Kasuya, Shusuke / Kasai, Rumiko / Tozawa, Mitsuyuki / Nakagawa, Koichi / Terada, Hitoshi

    Magnetic resonance imaging

    2013  Volume 31, Issue 8, Page(s) 1309–1317

    Abstract: Purpose: To determine the clinical value of routine use of thin-section 3D MRI using 3D FSE ... p<0.01 or p<0.001).: Conclusion: Routine use of reformatted thin-section 3D MRI using 3D FSE ... The standard 2D MRI protocol and reformatted 3D MRI protocol (three sagittal 2D sequence images plus 3D MRI ...

    Abstract Purpose: To determine the clinical value of routine use of thin-section 3D MRI using 3D FSE sequences with a variable flip angle technique for internal derangements of the knee joint at 3T.
    Method and materials: Thirty-four knees in 34 patients suspected of having internal derangements of the knee joint were included. Following standard 2D MRI protocol including sagittal PDWI, T1WI and T2*WI, coronal fat-suppressed PDWI, and axial fat-suppressed PDWI with 3-4mm thicknesses, fat-suppressed and water-excitation PDWI using 3D FSE sequences with a variable flip angle technique with 0.6mm thickness were obtained in coronal plane and the three major planes with 1mm thickness (3D MRI) was reformatted. The standard 2D MRI protocol and reformatted 3D MRI protocol (three sagittal 2D sequence images plus 3D MRI) were independently analyzed by two radiologists concerning presence or absence of lesions in the menisci, cartilage, and ligament. Interobserver agreements in both the MRI protocols were assessed by weighted-kappa coefficients. Regarding diagnostic accuracy, areas under the receiver operating characteristic curves (Az values) of both the MRI protocols were compared.
    Results: Thirty-eight meniscal lesions, 39 cartilage lesions, and 20 ligamentous lesions were surgically detected. Excellent interobserver agreements (kappa=0.91-0.98) were seen in both the MRI protocols, with a slightly better tendency in the reformatted 3D MRI protocol. Average Az values in detection of the meniscal, cartilage, and ligamentous lesions were significantly higher in the reformatted 3D MRI protocol than in the standard 2D MRI protocol (p<0.01 or p<0.001).
    Conclusion: Routine use of reformatted thin-section 3D MRI using 3D FSE sequences with a variable flip angle technique may improve diagnostic accuracy and confidence in detection of internal derangements of the knee joint.
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Algorithms ; Child ; Diagnostic Tests, Routine/methods ; Female ; Humans ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Knee Injuries/pathology ; Knee Joint/pathology ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged ; Reproducibility of Results ; Sensitivity and Specificity ; Young Adult
    Language English
    Publishing date 2013-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 604885-7
    ISSN 1873-5894 ; 0730-725X
    ISSN (online) 1873-5894
    ISSN 0730-725X
    DOI 10.1016/j.mri.2013.02.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Rapid musculoskeletal MRI with phase-sensitive steady-state free precession: comparison with routine knee MRI.

    Vasanawala, Shreyas S / Hargreaves, Brian A / Pauly, John M / Nishimura, Dwight G / Beaulieu, Christopher F / Gold, Garry E

    AJR. American journal of roentgenology

    2005  Volume 184, Issue 5, Page(s) 1450–1455

    Abstract: ... provides rapid 3D joint imaging with robust fat suppression and excellent cartilage delineation. ... suppressed MRI method for joint imaging.: Conclusion: Phase-sensitive steady-state free precession ... Objective: The aim of this work was to show the potential utility of a novel rapid 3D fat ...

    Abstract Objective: The aim of this work was to show the potential utility of a novel rapid 3D fat-suppressed MRI method for joint imaging.
    Conclusion: Phase-sensitive steady-state free precession provides rapid 3D joint imaging with robust fat suppression and excellent cartilage delineation.
    MeSH term(s) Adult ; Cartilage, Articular/anatomy & histology ; Cartilage, Articular/injuries ; Female ; Humans ; Image Processing, Computer-Assisted ; Imaging, Three-Dimensional ; Knee Injuries/diagnosis ; Knee Joint/anatomy & histology ; Magnetic Resonance Imaging/methods ; Male ; Middle Aged
    Language English
    Publishing date 2005-05
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 82076-3
    ISSN 1546-3141 ; 0361-803X ; 0092-5381
    ISSN (online) 1546-3141
    ISSN 0361-803X ; 0092-5381
    DOI 10.2214/ajr.184.5.01841450
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top