scholarly journals Anatomical Differences Between T2 WI FSE and Proton Density Fat Saturation Sequences in MRI Examination of Knee Joint with Sagittal Slice

2017 ◽  
Vol 5 (7) ◽  
Author(s):  
Gatot Murti Wibowo ◽  
Keyword(s):  
Knee Joint ◽  
Proton Density ◽  
Fat Saturation ◽  
Mri Examination ◽  
Sagittal Slice

scholarly journals Analisis Informasi Anatomi antara Sekuens T2WI FSE dan Proton Density Fat Saturation pada Pemeriksaan MRI Knee Joint Potongan Sagital (Studi pada Anterior Cruciate Ligament (ACL) dan Posterior Cruciate Ligament (PCL))

2016 ◽  
Vol 2 (2) ◽  
pp. 175-179
Author(s):  
Atina Izzah Kusumaningrum ◽  
Lidya Purna WS Kuntjoro ◽  
Gatot Murti Wibowo
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Posterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Proton Density ◽  
Border Line ◽  
Fat Saturation ◽  
Anterior Cruciate ◽  
Anatomical Information ◽  
Mri Knee

Background: There are clinical situations that radiology physicians need to assess Anterior Cruciate Ligament (ACL) and Posterior Cruciate Ligament (PCL) clearly with the two typical sequences (T2WI FSE sequence and Proton Density Fat Saturation). However, a slight difference in using the applied sequences will result different levels of image quality information. The aim of this study is to compare clinical  manifest in anatomical information on the resulted images between  T2WI FSE sequence and Proton Density Fat Saturation and to define the best sequence that fit to reveal ACL and PCL of the knee joint..Methods: The research was an experimental quasy. 20 sagital slices of  the knee jointMRI were acquired from 10 volunteers who underwent MRI examinations with the two methods (T2WI FSE and Proton Density Fat Saturation). 3 experienced radiology physicians blended in the image scoring when review ACL and PCL appearances on knee MRI images. Inter-observer suitability was checked with Kappa test. A non-parametric Wilcoxon analyses was the statistical tool to test the null hypothesis.Results: The result showed a significant difference in anatomical information of ACL and PCL when T2WI FSE and Proton Density Fat Saturation sequences applied on the MRI of the knee jointsagital slices (p-value 0,05). The mean rank of T2WI FSE was better than Proton Density Fat Saturation  which contributed to the value at 4,50. There was an increase in signals that lead to ACL and PCL appear to be more hyper-intens compared to sorrounding organs in general, except the border line  of PCL.  By this means, it was useful for evaluating the patient whose particularly with ACL post-grafting.Conclusion: There was the difference in anatomical information between T2WI FSE sequence and Proton Density Fat Saturation on MRI knee jointwith sagital slices for ACL and PCL studies.  T2WI FSE sequence was the best method for showing anatomical information of ACL and PCL, although a relative low signal still occured from border line  of PCL.

Value of Sagittal Fat-Suppressed Proton-Density Fast-Spin-Echo of the Knee Joint as a Limited Protocol in Evaluating Internal Knee Derangements

2011 ◽  
Vol 35 (5) ◽  
pp. 653-661 ◽  
Author(s):  
Nabil J. Khoury ◽  
Ziyad Mahfoud ◽  
Karim Z. Masrouha ◽  
Rayan Elkattah ◽  
Toni Assaad ◽  
...  
Keyword(s):  
Knee Joint ◽  
Spin Echo ◽  
Fast Spin Echo ◽  
Proton Density ◽  
Fast Spin

scholarly journals Additional Anterior Cruciate Ligament MRI Examination Protocols: a Standard of Diagnosis or a Whim of Researchers? (Review)

2020 ◽  
pp. 26-34
Author(s):  
O.O. Kostrub ◽  
V.V. Kotiuk ◽  
V.A. Podik ◽  
V.B. Mazevych ◽  
R.A. Tretiakov ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Acl Injury ◽  
Accurate Diagnosis ◽  
Acute Period ◽  
Mri Examination ◽  
Modern Methods ◽  
Anterior Cruciate ◽  
Methods Of Treatment

Summary. Standard MRI protocols of the knee joint in case of suspected anterior cruciate ligament (ACL) injury involve tomography in three mutually perpendicular planes – coronal, sagittal, and axial. Modern methods of treatment (especially refixation of the ACL and reconstruction of separate ACL bundles) and rehabilitation require more accurate diagnosis not only of the fact of injury, but also its clear location, degree and term. It is especially difficult to assess the nature and extent of ACL damage in the acute period and in cases of partial injury. Therefore, we propose to introduce into the standard of ACL MRI examination the additional use of oblique sagittal and oblique coronal sequences (images) oriented at an angle of ACL fibers with reduced to 0-2 mm interslice interval to improve the diagnosis of ACL injury. To reduce the duration of the study, it is possible to limit yourself to a small number of slices (images) in additional projections only in the area of the ACL.

scholarly journals Fast 3D Isotropic Proton Density-Weighted Fat-Saturated MRI of the Knee at 1.5 T with Compressed Sensing: Comparison with Conventional Multiplanar 2D Sequences

2021 ◽  
Author(s):  
Christoph H.-J. Endler ◽  
Anton Faron ◽  
Alexander Isaak ◽  
Christoph Katemann ◽  
Narine Mesropyan ◽  
...  
Keyword(s):  
Image Quality ◽  
Compressed Sensing ◽  
Cruciate Ligament ◽  
Meniscal Tear ◽  
Three Dimensional ◽  
Acquisition Time ◽  
Proton Density ◽  
Image Sharpness ◽  
Multiplanar Reformation ◽  
Fat Saturation

Purpose Compressed sensing (CS) is a method to accelerate MRI acquisition by acquiring less data through undersampling of k-space. In this prospective study we aimed to evaluate whether a three-dimensional (3D) isotropic proton density-weighted fat saturated sequence (PDwFS) with CS can replace conventional multidirectional two-dimensional (2D) sequences at 1.5 Tesla. Materials and Methods 20 patients (45.2 ± 20.2 years; 10 women) with suspected internal knee damage received a 3D PDwFS with CS acceleration factor 8 (acquisition time: 4:11 min) in addition to standard three-plane 2D PDwFS sequences (acquisition time: 4:05 min + 3:03 min + 4:46 min = 11:54 min) at 1.5 Tesla. Scores for homogeneity of fat saturation, image sharpness, and artifacts were rated by two board-certified radiologists on the basis of 5-point Likert scales. Based on these ratings, an overall image quality score was generated. Additionally, quantitative contrast ratios for the menisci (MEN), the anterior (ACL) and the posterior cruciate ligament (PCL) in comparison with the popliteus muscle were calculated. Results The overall image quality was rated superior in 3D PDwFS compared to 2D PDwFS sequences (14.45 ± 0.83 vs. 12.85 ± 0.99; p < 0.01), particularly due to fewer artifacts (4.65 ± 0.67 vs. 3.65 ± 0.49; p < 0.01) and a more homogeneous fat saturation (4.95 ± 0.22 vs. 4.55 ± 0.51; p < 0.01). Scores for image sharpness were comparable (4.80 ± 0.41 vs. 4.65 ± 0.49; p = 0.30). Quantitative contrast ratios for all measured structures were superior in 3D PDwFS (MEN: p < 0.05; ACL: p = 0.06; PCL: p = 0.33). In one case a meniscal tear was only diagnosed using multiplanar reformation of 3D PDwFS, but it would have been missed on standard multiplanar 2D sequences. Conclusion An isotropic fat-saturated 3D PD sequence with CS enables fast and high-quality 3D imaging of the knee joint at 1.5 T and may replace conventional multiplanar 2D sequences. Besides faster image acquisition, the 3D sequence provides advantages in small structure imaging by multiplanar reformation. Key Points:  Citation Format

scholarly journals A technique for 3D in vivo quantification of proton density and magnetization transfer coefficients of knee joint cartilage

2000 ◽  
Vol 8 (6) ◽  
pp. 426-433 ◽  
Author(s):  
J Hohe ◽  
S Faber ◽  
T Stammberger ◽  
M Reiser ◽  
K.-H Englmeier ◽  
...  
Keyword(s):  
Knee Joint ◽  
Magnetization Transfer ◽  
Proton Density ◽  
Joint Cartilage ◽  
Transfer Coefficients

Differences in MR signal intensity of lateral collateral ligament of knee joint on fat-suppressed proton density-weighted imaging

2016 ◽  
Vol 89 (1059) ◽  
pp. 20150893
Author(s):  
Han NA Lee ◽  
Sung Eun Ahn ◽  
Ji Seon Park ◽  
Kyung Nam Ryu ◽  
Wook Jin ◽  
...  
Keyword(s):  
Knee Joint ◽  
Signal Intensity ◽  
Lateral Collateral Ligament ◽  
Proton Density ◽  
Collateral Ligament

scholarly journals Proton density image with fat suppression ; it's useful application in MRI of the knee joint.

1996 ◽  
Vol 52 (10) ◽  
pp. 1362
Author(s):  
Junichirou Kodama ◽  
Yuji Kaga ◽  
Takayuki Tanaka ◽  
Shigeo Kinai
Keyword(s):  
Knee Joint ◽  
Fat Suppression ◽  
Proton Density ◽  
Density Image

scholarly journals Assessment of the Relationship between the Shape of the Lateral Meniscus and the Risk of Extrusion Based on MRI Examination of the Knee Joint

PLoS ONE ◽  
2016 ◽  
Vol 11 (7) ◽  
pp. e0159156 ◽  
Author(s):  
Arkadiusz Szarmach ◽  
Piotr Luczkiewicz ◽  
Monika Skotarczak ◽  
Mariusz Kaszubowski ◽  
Pawel J. Winklewski ◽  
...  
Keyword(s):  
Knee Joint ◽  
Lateral Meniscus ◽  
Mri Examination ◽  
The Relationship

scholarly journals In–Situ Cartilage Functionality Assessment Based on Advanced MRI Techniques and Precise Compartmental Knee Joint Loading through Varus and Valgus Stress

Diagnostics ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1476
Author(s):  
Oliver Said ◽  
Justus Schock ◽  
Daniel Benjamin Abrar ◽  
Philipp Schad ◽  
Christiane Kuhl ◽  
...  
Keyword(s):  
Knee Joint ◽  
Repeated Measures ◽  
T2 Mapping ◽  
Relaxation Times ◽  
Knee Joints ◽  
Proton Density ◽  
Friedman Test ◽  
Valgus Stress ◽  
Human Knee ◽  
Human Knee Joint

Stress MRI brings together mechanical loading and MRI in the functional assessment of cartilage and meniscus, yet lacks basic scientific validation. This study assessed the response-to-loading patterns of cartilage and meniscus incurred by standardized compartmental varus and valgus loading of the human knee joint. Eight human cadaveric knee joints underwent imaging by morphologic (i.e., proton density-weighted fat-saturated and 3D water-selective) and quantitative (i.e., T1ρ and T2 mapping) sequences, both unloaded and loaded to 73.5 N, 147.1 N, and 220.6 N of compartmental pressurization. After manual segmentation of cartilage and meniscus, morphometric measures and T2 and T1ρ relaxation times were quantified. CT-based analysis of joint alignment and histologic and biomechanical tissue measures served as references. Under loading, we observed significant decreases in cartilage thickness (p < 0.001 (repeated measures ANOVA)) and T1ρ relaxation times (p = 0.001; medial meniscus, lateral tibia; (Friedman test)), significant increases in T2 relaxation times (p ≤ 0.004; medial femur, lateral tibia; (Friedman test)), and adaptive joint motion. In conclusion, varus and valgus stress MRI induces meaningful changes in cartilage and meniscus secondary to compartmental loading that may be assessed by cartilage morphometric measures as well as T2 and T1ρ mapping as imaging surrogates of tissue functionality.

Effects of Osmium Tetroxide on the Rabbit Knee Joint Normal Synovial Membrane

1987 ◽  
Vol 16 (1) ◽  
pp. 121-129
Author(s):  
M. Möttönen ◽  
M. Pantio ◽  
T. Nevalainen
Keyword(s):  
Knee Joint ◽  
Synovial Membrane ◽  
Osmium Tetroxide ◽  
Rabbit Knee
Sign in / Sign up

Export Citation Format

Share Document