No abstract available.
Magnetic Resonance Imaging* ; Myelography*

Magnetic resonance imaging with its superior soft tissue contrast resolution and absence of beam hardening artifacts, combined with its ability to perform multiplanar imaging, is now effective tool in diagnostic imagings. Magnetic resonance is primarily a phenomenon that involves atomic nuclei. It provides totally new clinical informations with no known hazards through the use of very weak interactions with endogenous stable magnetic atomic nuclei. This article briefly summarized the basic mechanism of generation and detection of the signals and general sorts of tissue properties which can influence the signals and thereby give rise to tissue contrast. It also describes how the machine-operating parameters can be used to manipulate the tissue contrast observed in the image.
Artifacts ; Magnetic Resonance Imaging*

No abstract available.
Magnetic Resonance Imaging* ; Neurons*

No abstract available.
Abscess* ; Magnetic Resonance Imaging*

No abstract available.
Humans ; Magnetic Resonance Imaging*

Metaphyseal cysts are common findings in Legg-Calv Perthes(LCP) disease, though usually disappear within 6-12 months. Several studies have described the MR imaging findings of these cysts, though serial MRI findings have not been documented. In this report, therefore, we report the serial MRI results of metaphyseal cyst in LCP patients.
Humans ; Magnetic Resonance Imaging

No abstract available.
Magnetic Resonance Imaging*

No abstract available.
Hemangioma* ; Magnetic Resonance Imaging*

No abstract available.
Hematoma* ; Magnetic Resonance Imaging*

Purpose: To compare the thickness of the repaired full-thickness rotator-cuff tear to that of normal rotator-cuff in young and old persons and evaluate the relationship between the tear size and the repaired thickness in the full-thickness tear using MRI. Materials and Methods: The thickness of the rotator-cuff of the repaired full thickness tear(age: 45~77, mean 63.3 years, 19 patients: group 1) were compared with those of old intact patients (age: 46~69, mean 57.9 years, 23 patients: group 2) and young intact patients (age: 18~30, mean 23.3 years, 22 patients: group 3). The tear length and width was measured in oblique coronal and oblique sagittal view of MRA, respectively, and the thickness was measured in coronal oblique view 15mm anterior to the posterolateral margin of the glenoid. Correlation between the preoperative tear size (the bigger one between the length and the width) and the postoperative thickness in group 1 was also evaluated statistically. Results: The postoperative rotator-cuff thickness in group 1 was 3.0 mm in average, which was inversely proportional to the preoperative tear size (P<0.001). The rotator-cuff thickness was 3.9mm in group 2 and 5.0mm in group 3, and there was statistically significant difference among the three groups(P<0.05). Conclusion: The rotator-cuff thickness decreases with age and the postoperative thickness in the full-thickness tear was inversely proportional to the tear size, smaller than that of the intact rotator-cuff.
Humans ; Magnetic Resonance Imaging*