Partial flip-angle spin-echo imaging: clinical applications.
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Biomedical subjects
Publications and source records attributed to P Hugonet.
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A prospective MRI study of the spine comparing short inversion-recovery sequences (STIR)-one the features of which is to potentiate the contrast of both long T1 and T2 sequences-with other spin echo and/or gradient echo MRI sequences, was conducted in 20 patients with suspected vertebral metastases. The features of the signal on STIR sequences were initially defined in 14 healthy volunteers. In the patients, the various MRI sequences were also compared to each other and to standard x-rays and bone scans. The sensitivity of detection of vertebral metastases did not appear to be significantly different between T1 sequences and the STIR sequence. However, these two sequences appeared to be significantly more sensitive than T2-weighted sequences. The STIR sequences therefore appears to be a logical complement to T1-weighted sequences in the detection of vertebral secondaries. This sequence even appears to be superior in the following situations: investigation of the cervical vertebrae, follow-up of irradiated bone, early detection of periduritis and lesions of the posterior arch.
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A 13-year old girl was admitted to our hospital because of an ulcerated gluteal tumor. This tumor was present since birth. A diagnostic procedure was performed. This tumor was strictly limited to the gluteal region, without pelvic extension, but with sacral malformation. Total surgical excision was completed. Pathology report revealed a histologically benign teratoma. The origin of the tumor is discussed.
Febrile painful edema of a limb segment in Black children should suggest a bone complication (infarct or osteomyelitis) of a homozygous sickle cell anemia. The possibility of an early diagnosis can be improved by scintigraphy since the appearance of radiologic signs is delayed in relation to functional symptomatology onset. The risk of an infectious graft, particularly from Salmonella in children under 2 years, on a bone infarct makes it essential to combine routine antibiotic therapy with the orthopedic treatment, to provide resolution of the very often quite impressive lesions.
The authors emphasize the frequency of intracranial tumors in psychiatric patients. They make a distinction between the rare cases of psychiatric patients with intracranial tumors and the even most-frequent cases of tumors that express themselves through psychiatric disorders. According to the authors, the most important detection-tests are the brain scan and, more recently, the EMI scan or tomodensitometer.
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