scholarly journals Clinical and Prognostic Significance of Femoral Marrow Magnetic Resonance Imaging in Patients With Malignant Lymphoma

Blood ◽  
1997 ◽  
Vol 89 (1) ◽  
pp. 286-290 ◽  
Author(s):  
Saburo Tsunoda ◽  
Shojiro Takagi ◽  
Osamu Tanaka ◽  
Yasusada Miura
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Malignant Lymphoma ◽  
Spin Echo ◽  
Prognostic Significance ◽  
Resonance Imaging ◽  
Mr Images ◽  
Bone Marrow Histology ◽  
Recovery Technique ◽  
Magnetic Resonance Imaging Mri

Abstract We evaluated 56 consecutive patients with newly diagnosed lymphoma including 48 with non-Hodgkin's lymphoma (NHL) and 8 with Hodgkin's disease to determine the clinical and prognostic significance of magnetic resonance imaging (MRI) of the femoral marrow. MR images of the femoral marrow were obtained by the T1-weighted spin echo method and the short TI inversion recovery technique. Abnormal “positive” images were seen in 29 of the 56 patients (52%). All 17 patients with positive biopsy results showed abnormal images on their femoral marrow MRI. Three “positive” MRI patterns — scattered (72%), uniform (21%), and nodular (7%) — were observed. The overall survival of the patients with a positive MRI pattern was significantly poorer than that of patients with a normal pattern (P = .0129). Survival did not differ significantly according to MRI pattern. The 3-year survival rate in the patients with a normal MRI pattern was 89.9% and in the patients with a positive MRI pattern, it was 41.0%. This difference was statistically significant (P = .0279) when we evaluated only the patients with NHL. Patients with positive MRI patterns, but a normal bone marrow histology, showed a significantly shorter survival than those with a normal MRI pattern (P = .016). These results indicate that abnormal MR images of the femoral marrow are associated with a significantly poorer survival in patients with malignant lymphoma, regardless of histologic findings in the marrow.

scholarly journals Clinical and Prognostic Significance of Femoral Marrow Magnetic Resonance Imaging in Patients With Malignant Lymphoma

Blood ◽  
1997 ◽  
Vol 89 (1) ◽  
pp. 286-290 ◽  
Author(s):  
Saburo Tsunoda ◽  
Shojiro Takagi ◽  
Osamu Tanaka ◽  
Yasusada Miura
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Malignant Lymphoma ◽  
Spin Echo ◽  
Prognostic Significance ◽  
Resonance Imaging ◽  
Mr Images ◽  
Bone Marrow Histology ◽  
Recovery Technique ◽  
Magnetic Resonance Imaging Mri

We evaluated 56 consecutive patients with newly diagnosed lymphoma including 48 with non-Hodgkin's lymphoma (NHL) and 8 with Hodgkin's disease to determine the clinical and prognostic significance of magnetic resonance imaging (MRI) of the femoral marrow. MR images of the femoral marrow were obtained by the T1-weighted spin echo method and the short TI inversion recovery technique. Abnormal “positive” images were seen in 29 of the 56 patients (52%). All 17 patients with positive biopsy results showed abnormal images on their femoral marrow MRI. Three “positive” MRI patterns — scattered (72%), uniform (21%), and nodular (7%) — were observed. The overall survival of the patients with a positive MRI pattern was significantly poorer than that of patients with a normal pattern (P = .0129). Survival did not differ significantly according to MRI pattern. The 3-year survival rate in the patients with a normal MRI pattern was 89.9% and in the patients with a positive MRI pattern, it was 41.0%. This difference was statistically significant (P = .0279) when we evaluated only the patients with NHL. Patients with positive MRI patterns, but a normal bone marrow histology, showed a significantly shorter survival than those with a normal MRI pattern (P = .016). These results indicate that abnormal MR images of the femoral marrow are associated with a significantly poorer survival in patients with malignant lymphoma, regardless of histologic findings in the marrow.

Magnetic resonance imaging after frontal sinus surgery with fat obliteration

1995 ◽  
Vol 109 (11) ◽  
pp. 1115-1119 ◽  
Author(s):  
R. Keerl ◽  
R. Weber ◽  
G. Kahle ◽  
W. Draf ◽  
J. Constantinidis ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Connective Tissue ◽  
Frontal Sinus ◽  
Spin Echo ◽  
Sinus Surgery ◽  
Fast Spin Echo ◽  
Fatty Tissue ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri

AbstractThe obliteration of the frontal sinus via an osteoplastic approach is performed with the aim of achieving a permanent ‘switching off’ by final and conclusive clearing out. For this, freshly harvested abdominal fat has shown itself to be the best clinically. It is possible to demonstrate the vitality of fat transplanted into the frontal sinus without an operation i.e. by a macroscopical and histological examination using magnetic resonance imaging (MRI). The magnetic resonance examinations were carried out on a supraconductive 0.5 T Magnet (Gyroscan T.S.II, Philips Medicine Systems, Eindhoven, Netherlands) with a quadrature (square) head spool. We produced T1-weighted spin echo images (TR: 450–550 ms; TE: 20–25 ms), T2-weighted fast spin echo images or in double-echo technique in transverse orientation (Turbo SE or TR: 2000–2500 ms; TE: 50–90 ms) and short tau inversion recovery (STIR) sequences for fat suppression (TJ: 140 ms; TR: 1400 ms; TE: 30 ms). The fat implanted into the frontal sinus of 11 patients aged 22–65 years, having undergone an osteoplastic frontal sinus operation with obliteration, was examined post-operatively by MRI. Objectives were the time-dependent distribution of portions of vital fatty or connective tissue, the eventual development of necroses or cysts as well as recurrences, inflammatory complications or re-epithelization of the frontal sinus four to 24 months postoperatively. In only six out of 11 cases was vital fatty tissue found. Fatty necrosis occurred five times, whereas in four cases a transformation into granulation tissue and in one case into connective tissue could be seen. All 11 patients were complaint-free. Long-term observations are needed to see if differences in the recurrence rate of frontal sinus disease are dependent on whether the implanted fat remains vital or necrosed and transformed.

Magnetic Resonance Imaging of the Facial Nerve

1989 ◽  
Vol 101 (3) ◽  
pp. 295-301 ◽  
Author(s):  
Donald G. Wortham ◽  
Louis M. Teresi ◽  
Robert B. Lufkin ◽  
William N. Hanafee ◽  
Paul H. Ward
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Facial Nerve ◽  
Temporal Bone ◽  
Resonance Imaging ◽  
Mr Images ◽  
Beam Hardening ◽  
Parotid Tumors ◽  
Seventh Nerve ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) of the facial nerve was evaluated by studying normal volunteers and patients with diseases of the facial nerve with a 0.3 Tesla permanent-magnet MRI system with special surface colls. The normal MR images were correlated with the anatomy of thin cryosection specimens of fresh cadavers. The seventh nerve was followed from its nucleus in the brainstem through the temporal bone to the parotid gland bed. The entire labyrinth and tympanic portions, as well as the geniculate ganglion, could be shown with appropriate scan planes. Examples of brainstem diseases affecting the facial nerve and nucleus, facial neuromas, parotid tumors involving the facial nerve, and other diseases were studied. MRI is a technique that allows unique evaluation of the entire course of the facial nerve. It produces superior Images of the facial nerve with high-contrast resolution. Unlike computed tomography, there is no beam-hardening artifact from the temporal bone or exposure to ionizing radiation and contrast agents. MRI also allows visualization of the main trunks of the facial nerve in the parotid bed not possible with any other imaging technique.

Magnetic Resonance Imaging, Chest Radiography, Computed Tomography and Ultrasonography in Malignant Lymphoma

1987 ◽  
Vol 28 (3) ◽  
pp. 253-262 ◽  
Author(s):  
R. Nyman ◽  
S. Rehn ◽  
B. Glimelius ◽  
H. Hagberg ◽  
A. Hemmingsson ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Lymph Nodes ◽  
Malignant Lymphoma ◽  
Chest Radiography ◽  
Resonance Imaging ◽  
Weighted Image ◽  
Non Hodgkin Lymphoma ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) was compared with chest radiography, computed tomography (CT) and ultrasonography (US) for demonstration of spleen and liver engagement and enlarged lymph nodes in patients with malignant lymphoma. The investigation comprised 24 patients with Hodgkin's disease (HD) and 39 with non-Hodgkin lymphoma (NHL). MRI demonstrated enlarged lymph nodes, distinctly separated from vessels, fat, muscle, liver and occasionally also pancreas without any contrast medium. The distinction between lymph nodes and spleen was, however, poor in the images. In the mediastinum, MRI was superior to chest radiography and had an accuracy similar to that of CT. In the abdomen and the pelvis MRI had slight advantages over CT in detection of enlarged lymph nodes. Compared with US the MRI results were similar in the abdomen and somewhat better in the pelvis. MRI and US were better than CT in revealing HD infiltrates in the spleen. Infiltration of NHL in the spleen was slightly better disclosed at US than at CT and MRI; most of the NHL infiltration, confirmed at histopathology, could, however, not be revealed with any of the modalities, except when the size of the spleen was considered. Regions in the spleen, displayed with low image intensity in the T2 weighted image, were most likely due to increased amount of fibrotic tissue in the lymphomatous lesions. Good demonstration of lymph nodes and lymphomatous lesions in the spleen with MRI required two sequences; one with short TR and TE (T1 weighted image) and one with long TR and TE (T2 weighted image).

scholarly journals Sequential MR Images and Radiographs of Epiphyseal Osteomyelitis in the Distal Femur of an Infant

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Hitomi Hara ◽  
Toshihiro Akisue ◽  
Teruya Kawamoto ◽  
Masahiro Kurosaka
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Early Diagnosis ◽  
Early Phase ◽  
Therapeutic Response ◽  
Distal Femur ◽  
Acute Osteomyelitis ◽  
Resonance Imaging ◽  
Mr Images ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) plays an important role in the diagnosis of osteomyelitis, especially during the early phase of the disease. The findings of sequential MRIs during the course of treatment in acute osteomyelitis in children have not yet been reported in the literature. We present a case of acute epiphyseal osteomyelitis in the distal femur of an infant. We monitored imaging changes by sequential MRIs and radiographs. MRI was more useful than radiograph for early diagnosis and evaluation of therapeutic response.

A comparison of magnetic resonance imaging sequences in evaluating pathological changes in the canine spinal cord

2011 ◽  
Vol 14 (3) ◽  
pp. 481-484 ◽  
Author(s):  
Z. Adamiak ◽  
A. Pomianowski ◽  
Y. Zhalniarovich ◽  
M. Kwiatkowska ◽  
M. Jaskólska ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Spin Echo ◽  
Fast Spin Echo ◽  
Spinal Diseases ◽  
Pathological Changes ◽  
Resonance Imaging ◽  
Scanning Time ◽  
Magnetic Resonance Imaging Mri

A comparison of magnetic resonance imaging sequences in evaluating pathological changes in the canine spinal cord This paper discusses 28 canine patients subjected to low-field magnetic resonance imaging (MRI) of the spinal cord for neurological indications. The authors describe and compare the used MRI sequences with an indication of the most effective sequences in MRI examinations that require short scanning time. The most effective sequences supporting a quick diagnosis of spinal diseases in dogs were SE (spin echo), FSE (fast spin echo) and 3D HYCE (hybrid contrast enhancement).

Prognostic Significance of Magnetic Resonance Imaging of Femoral Marrow in Patients With Myelodysplastic Syndromes

1999 ◽  
Vol 17 (1) ◽  
pp. 277-277 ◽  
Author(s):  
Shojiro Takagi ◽  
Osamu Tanaka ◽  
Hideki Origasa ◽  
Yasusada Miura
Keyword(s):  
Magnetic Resonance ◽  
Myelodysplastic Syndromes ◽  
Myeloid Leukemia ◽  
Spin Echo ◽  
Prognostic Significance ◽  
Magnetic Resonance Images ◽  
Resonance Imaging ◽  
Free Survival ◽  
Recovery Technique ◽  
Pattern Versus

PURPOSE: To investigate whether the abnormalities observed on femoral marrow magnetic resonance images are related to the development of leukemia and survival of patients with myelodysplastic syndromes (MDS). PATIENTS AND METHODS: The findings on magnetic resonance images of the femoral marrow were evaluated over periods of 1 to 92 months (median, 18 months) in 42 consecutive adult patients with newly diagnosed MDS. Magnetic resonance images were obtained by the T1-weighted spin echo method and the short TI inversion recovery technique. RESULTS: Magnetic resonance images showed that the femoral marrow patterns changed from fatty, faint, or nodular to scattered or uniform as the disease progressed. Development of acute myeloid leukemia was observed in only 13 patients whose marrow exhibited a scattered or uniform pattern. The overall survival of the 29 patients with a scattered or uniform marrow pattern was significantly shorter than that of the 13 patients with a fatty, faint, or nodular marrow pattern (10.7% v 73.3% at 7 years; P < .01). The period of leukemia-free survival was also significantly shorter in the patients with a scattered or uniform marrow pattern versus a fatty, faint, or nodular pattern (37.7% v 100% at 7 years; P < .01). CONCLUSION: Magnetic resonance images of the femoral marrow can provide valuable information for assessing the prognosis and determining the most appropriate management of patients with MDS.

Stiffness Characterization Using a Dynamic Heart Phantom and Magnetic Resonance Imaging

2011 ◽  
Author(s):  
Karen Chang Yan ◽  
Mary Kate McDonough ◽  
James J. Pilla ◽  
Chun Xu
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Motion Tracking ◽  
Myocardial Strain ◽  
The United States ◽  
Resonance Imaging ◽  
Mr Images ◽  
Artery Disease ◽  
Magnetic Resonance Imaging Mri ◽  
And Function

Heart disease is the number one cause of death in the United States [1]. Cardiac Magnetic Resonance Imaging (MRI) technology can be used to diagnose and evaluate a number of diseases and conditions such as coronary artery disease, damage caused by a heart attack, heart failure, and heart valve problems etc. Given the inherent difficulty in imaging the heart in motion, many efforts have been made to improve cardiac motion tracking and eliminate motion related artifacts. A dynamic heart phantom (DHP) capable of simulating true physiological motions is a valuable research tool for improving quality of MR images and determining critical diagnostic information. For instance, MR images have been used to quantify myocardial strain and estimate soft tissue material parameters and in turn to learn about cardiac structure and function [2–4]. In these studies, heart phantoms made of rubber like materials with known material properties are often used as a mean of validation.

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