Septic Arthritis versus Transient Synovitis at MR Imaging: Preliminary Assessment with Signal Intensity Alterations in Bone Marrow

Radiology ◽  
1999 ◽  
Vol 211 (2) ◽  
pp. 459-465 ◽  
Author(s):  
Sang Kwon Lee ◽  
Kyung Jin Suh ◽  
Yong Woon Kim ◽  
Hun Kyu Ryeom ◽  
Yong Sun Kim ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Mr Imaging ◽  
Septic Arthritis ◽  
Signal Intensity ◽  
Preliminary Assessment ◽  
Transient Synovitis

The detection of bone marrow involvement by lymphoma using magnetic resonance imaging.

1987 ◽  
Vol 5 (2) ◽  
pp. 225-230 ◽  
Author(s):  
A F Shields ◽  
B A Porter ◽  
S Churchley ◽  
D O Olson ◽  
F R Appelbaum ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Signal Intensity ◽  
Imaging System ◽  
Pulse Sequence ◽  
Spin Echo ◽  
Bone Marrow Involvement ◽  
Marrow Fat ◽  
Spin Echo Sequence

We used magnetic resonance (MR) to image the bone marrow of 31 patients with lymphoma. Images were obtained of the femoral, pelvic, and vertebral marrow with a 0.15 tesla imaging system using a T1-weighted spin echo sequence (TR600/TE 40). With this pulse sequence, normal marrow produces a high intensity signal that reflects the presence of marrow fat (short T1 relaxation time). We previously reported MR imaging of patients with leukemia in relapse and found a diffusely and symmetrically decreased marrow signal intensity due to the replacement of normal marrow fat by cellular material with a long T1. Unlike leukemia, patients with lymphomatous marrow involvement often had patchy, often discrete, areas of low signal intensity, representing focal marrow infiltration. Five of six patients in this study with lymphoma detected by histologic examination also had marrow lesions seen on MR. An additional four patients had marrow lesions detected by MR that were not detected on initial marrow biopsies; two of these had marrow involvement proven on subsequent biopsies, one had disease isolated to the vertebrae that was never pathologically documented, and one had progression of disease in the marrow documented by MR without biopsy confirmation. These results indicate that marrow involvement with lymphoma can be detected by MR imaging and that MR can complement bone marrow biopsy.

Discovertebral Junction of the Spine — A Cadaveric Study by Spin-Echo MR Imaging

1995 ◽  
Vol 36 (1) ◽  
pp. 1-8
Author(s):  
Y. Kakitsubata ◽  
K. Nabeshima ◽  
S. Kakitsubata ◽  
M. Koono ◽  
K. Watanabe
Keyword(s):  
Bone Marrow ◽  
Mr Imaging ◽  
Signal Intensity ◽  
Spin Echo ◽  
Surface Coil ◽  
Proton Density ◽  
Mr Images ◽  
Small Surface ◽  
Intermediate Signal Intensity ◽  
Head Coil

To evaluate the MR appearance of the discovertebral junction (DVJ) of the spine, we examined 161 DVJs in 27 cadaveric spines using superconductive MR imaging. T1-, proton density-, and T2-weighted spin-echo imaging were used. With a small surface coil, higher resolution and more sharply defined contours of the DVJ were obtained than when using a head coil. Cortical bone had very low signal intensity in all sequences. Cartilaginous end-plate (CP) was of low to intermediate signal intensity on T1-weighted images, and of low signal intensity on proton density- and T2-weighted images. MR images were able to reveal the gross CP appearances, Schmorl's nodules, and adjacent bone marrow pathology. We conclude that MR imaging is valuable for assessing abnormalities of the DVJ.

Bone-marrow MR imaging before and after autologous marrow transplantation in lymphoma patients without known bone-marrow involvement

1997 ◽  
Vol 38 (5) ◽  
pp. 896-902 ◽  
Author(s):  
H. H. Lien ◽  
V. Blomlie ◽  
A. K. Blystad ◽  
H. Holte ◽  
R. Langholm ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Mr Imaging ◽  
Signal Intensity ◽  
Marrow Transplantation ◽  
Bone Marrow Involvement ◽  
Time Inversion ◽  
Before And After ◽  
The Difference ◽  
Student’S T ◽  
Student’S T Test

Purpose: To study lumbar bone marrow by means of MR imaging before and after bone-marrow transplantation in lymphoma patients. Particular emphasis was paid to heterogeneity and to focal manifestations, i.e. appearances that could simulate tumor. Material and Methods: Twenty-two patients who were disease-free for a minimum of 30 months after transplantation were studied in 107 MR examinations. Two radiologists visually evaluated coronal T1-weighted and short inversion time inversion-recovery (STIR) images. Results: T1-weighted images demonstrated a more heterogeneous marrow after transplantation than before it. Sharply defined focal low signal intensity areas appeared on this sequence in 5 (23%) of the 22 patients at between 21 and 60 weeks after transplantation. The mean age of these 5 patients was 48.4 years (range 42–54 years). The difference in age between these 5 patients and the remaining 17 patients, who had a mean age of 33.4 years (range 14–51 years), was statistically significant (p < 0.01, Student's t-test, 2-sided test). Conclusion: Sharply defined focal low signal intensity areas may be seen on T1-weighted images of bone marrow in patients who are in complete remission after transplantation, particularly in those aged over 40–45 years.

MR imaging of transient synovitis: differentiation from septic arthritis

2006 ◽  
Vol 36 (11) ◽  
pp. 1154-1158 ◽  
Author(s):  
Wan Jik Yang ◽  
Soo Ah Im ◽  
Gye-Yeon Lim ◽  
Ho Jong Chun ◽  
Na Young Jung ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Septic Arthritis ◽  
Transient Synovitis

scholarly journals MR imaging for evaluation of lesions of the cranial vault: a pictorial essay

2003 ◽  
Vol 61 (3A) ◽  
pp. 521-532 ◽  
Author(s):  
Lázaro Amaral ◽  
Miriam Chiurciu ◽  
João Ricardo Almeida ◽  
Nelson Fortes Ferreira ◽  
Renato Mendonça ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Bone Marrow ◽  
Mr Imaging ◽  
Signal Intensity ◽  
Langerhans Cell Histiocytosis ◽  
Early Stage ◽  
Sinus Pericranii ◽  
Paget Disease ◽  
Traumatic Lesions ◽  
Pictorial Essay

PURPOSE: A variety of diseases affect the calvaria. They may be identified clinically as palpable masses or incidentally in radiologic examinations. There are many diagnostic possibilities, including congenital, neoplastic, inflammatory and traumatic lesions. The purpose of this study is to illustrate the main calvarial lesions through MR imaging, their signal intensity and extension to neighboring sites. METHOD: A retrospective analysis of 81 cases, from November 1996 to July 2001, was conducted. The examinations were performed on a 1.5 T equipment and each one of the cases was pathologically proven. RESULTS: The results were: dermoid cysts [4 cases (5%)], epidermoid cysts [2 cases (2.5%)], cephalocele [14 cases (17.5%)], sinus pericranii [3 cases (3.7%)], leptomeningeal cysts [4 cases (5%)], Langerhans cell histiocytosis [10 cases (12.5%)], lipoma [4 cases (5%)], fibrous dysplasia [13 cases (16.2%)], osteoma [8 cases (10%)], hemangioma [1 case (1.2%)], meningioma [3 cases (3.7%)], chondrosarcoma [5 cases (6.2%)], hemangiosarcoma [1 case (1.2%)], multiple myeloma [3 cases (3.7%)], sarcomatous transformation of Paget disease [1 case (1.3%)], and metastasis [5 cases (6.2%)]. CONCLUSION: MRI identifies bone marrow abnormalities and invasion of adjacent tissues at an early stage. Therefore, it is an essential method when it commes to properly evaluating calvarial lesions.

scholarly journals Vertebral Bone Marrow and Endplate Assessment on MR Imaging for the Differentiation of Modic Type 1 Endplate Changes and Infectious Spondylodiscitis

2020 ◽  
Vol 9 (3) ◽  
pp. 826 ◽  
Author(s):  
Ursula Schwarz-Nemec ◽  
Klaus M. Friedrich ◽  
Christoph Stihsen ◽  
Felix K. Schwarz ◽  
Siegfried Trattnig ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Mr Imaging ◽  
Diagnostic Accuracy ◽  
Characteristic Analysis ◽  
Vertebral Bone ◽  
Endplate Changes ◽  
Modic Type ◽  
Infectious Spondylodiscitis ◽  
Vertebral Bone Marrow

On magnetic resonance (MR) imaging, Modic type 1 (MT1) endplate changes and infectious spondylodiscitis share similar findings. Therefore, this study investigated vertebral bone marrow and endplate changes to enable their differentiation. The lumbar spine MR examinations of 91 adult patients were retrospectively included: 39 with MT1; 19 with early spondylodiscitis without abscess; and 33 with advanced spondylodiscitis with abscess. The assessment included percentage of bone marrow edema on sagittal short tau inversion recovery images, and the signal ratio of edema to unaffected bone and endplate contour (normal; irregular, yet intact; blurred; destructive) on sagittal unenhanced T1-weighted images. Differences were tested for statistical significance by Chi-square test and mixed model analysis of variance. The MR diagnostic accuracy in differentiating MT1 and spondylodiscitis was assessed by cross-tabulation and receiver-operating characteristic analysis. The endplate contours, edema extents, and T1-signal ratios of MT1 (extent, 31.96%; ratio, 0.83) were significantly different (p < 0.001) from early spondylodiscitis (56.42%; 0.60), and advanced spondylodiscitis (91.84%; 0.61). The highest diagnostic accuracy (sensitivity, 94.87%; specificity, 94.23%; accuracy, 94.51%) in identifying MT1 was provided by an irregular, yet intact endplate contour. This may be a useful MR feature for the differentiation between MT1 and spondylodiscitis, particularly in its early stage.

MR Imaging of Bone Marrow Edema and Joint Effusion in Patients with Osteonecrosis of the Femoral Head: Relationship to Pain

2003 ◽  
Vol 181 (2) ◽  
pp. 545-549 ◽  
Author(s):  
Guo-Shu Huang ◽  
Wing P. Chan ◽  
Yue-Cune Chang ◽  
Cheng-Yen Chang ◽  
Cheng-Yu Chen ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Femoral Head ◽  
Mr Imaging ◽  
Bone Marrow Edema ◽  
Joint Effusion ◽  
Marrow Edema
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