AJR. American journal of roentgenology
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AJR Am J Roentgenol · Mar 1998
Differentiation of necrotizing fasciitis and cellulitis using MR imaging.
This study was performed to evaluate the diagnostic value of MR imaging in differentiating necrotizing fasciitis from cellulitis. ⋯ When no deep fascial involvement is revealed with MR imaging, necrotizing fasciitis can be excluded. However, because its sensitivity exceeds its specificity, MR imaging tends to overestimate the extent of deep fascial involvement. Therefore, the therapeutic regimen should be based on a combination of clinical findings and MR imaging.
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AJR Am J Roentgenol · Feb 1998
Comparative StudyDiffusion-weighted MR imaging with a single-shot echoplanar sequence: detection and characterization of focal hepatic lesions.
The purpose of this study was to determine the usefulness of diffusion-weighted MR imaging with single-shot echoplanar imaging in characterizing focal hepatic lesions by apparent diffusion coefficient (ADC) and contrast-to-noise ratio (CNR) measurements. ⋯ Mean values for ADCs differed for the three types of the hepatic lesions and were higher than ADCs of the normal liver. We suggest that diffusion-weighted imaging may be useful for increased detection of HCCs and metastases and in distinguishing these entities from hemangiomas.
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AJR Am J Roentgenol · Jan 1998
Comparative StudyHalf-dose gadolinium-enhanced MR imaging with magnetization transfer technique in brain tumors: comparison with conventional contrast-enhanced MR imaging.
The purpose of this study was to determine whether half-dose enhanced MR imaging with magnetization transfer (MT) saturation can replace standard-dose enhanced MR imaging without MT saturation in patients who have brain tumors. ⋯ Because half-dose enhanced MR imaging with MT yields enhancement comparable with that of standard-dose enhanced conventional MR imaging in less than 50% of cases, the former technique would replace the latter in only limited cases such as selected extraaxial tumors.