Short T1 calcification - Questions and Answers in MRI
Therefore, materials such as cortical bone and globular calcifications are routinely dark/dark on MRI. Areas containing microcalcifications, however, may sometimes appear paradoxically bright on T1-weighted images. Two common examples are shown below.
Identification of Calcification with Magnetic Resonance Imaging …
In MRI, calcification appears with various signal intensities on conventional spin echo (SE) T1 or T2 weighted images (3, 4, 5), which makes it difficult to identify definitively as calcium. In gradient-echo acquisitions, calcifications usually appear as hypointense and cannot be …
Identification of calcification with MRI using …
2008年12月18日 · Susceptibility weighted imaging (SWI) is a new MRI technique that can identify calcification by using phase images. We present a single case with a partially calcified oligodendroglioma, multiple calcified cysticercosis lesions, and multiple physiologic calcifications in the same patient.
High signal intensity in MR images of calcified brain tissue.
1991年4月1日 · Calcified lesions of the brain occasionally appear bright on T1-weighted MR images. This report shows that particulate calcium can reduce T1 relaxation times by a surface relaxation mechanism. Calcium particles with greater surface area show greater T1 relaxivity.
A review of pathologies associated with high T1W signal …
With basal ganglia calcification the commonest finding on MRI is hypo-intensity on T1 and T2 weighted images due to insufficiency of mobile protons. The occasional T1 weighted hyperintensity with calcification is thought to be due to the crystalline structure of the calcium.
Unusual Extensive T1 Hyperintense Signals on MR Imaging in ...
2010年3月1日 · These multiple extensive T1 hyperintense signals were confirmed to be calcifications on CT, which was performed subsequent to the MR imaging. Few of the T1 hyperintense lesions showed mild enhancement on contrast administration.
Hyperintense disks on T1-weighted MR images: correlation with ...
1995年5月1日 · RESULTS: Absence of calcification was associated with disks that were isointense relative to normal disks (P < .001), mild to moderate calcification was associated with hyperintense disks (P < .001 and P = .004 [two readers]), and both mild to moderate and marked calcifications were associated with hypointense disks (P < .001).
Calcification demonstrated as high signal intensity on T1 …
1993年11月1日 · PURPOSE: To report that calcification of lumbar disks may not show the usual low signal intensity on T1-weighted magnetic resonance (MR) images. MATERIALS AND METHODS: The authors present five cases of high signal intensity on T1-weighted MR images of a lumbar disk that reflect the presence of calcium deposition.
Thoracic calcifications on magnetic resonance imaging: …
Thoracic calcifications have variable signal intensity on T1- and T2-weighted MR images, sometimes appearing hyperintense. Lesion density on CT appears to correlate negatively with lesion signal intensity on MR images. Keywords: Calcification, physiologic; Thorax/diagnostic imaging; Tomography, X-ray computed; Magnetic resonance imaging.
CT and MR imaging showed basal ganglia calcification that appeared as high signal intensity on T1-weighted images of a patient with pseudohypoparathyroidism. MR imaging of an experimental model of calcium phosphate suspensions showed a signal similar to that seen in the patient.