MR Findings on Pediatric Hand-foot-mouth Disease Encephalitis / 中国医学影像学杂志

Purpose To improve the comprehension of MR imaging features of hand-foot-mouth disease (HFMD).Materials and Methods The MRI findings of 5 cases of HFMD were retrospectively analyzed.Results The lesions in 4 cases were located in the junction of the pons and medulla oblongata, of which 1 lesion extended bilaterally at the same time. The lesion in the fifth case was located in dorsal pons. All lesions demonstrated patchy slight hyperintensity on T1WI and slight hypointensity on T2WI. These ill-circumscribed lesions showed hyperintensity on diffusion-weighted imaging. Conclusion HFMD possesses certain MR imaging characteristics, thus providing reliable imaging evidence for clinical diagnosis.

MR angiography and arterial spin labeling proton in assessing correlation between transient ischemic attack and intracranial artery perfusion abnormalities / 中国医学影像技术

Objective To assess the value of magnetic resonance angiography (MRA) and arterial proton spin labeling (ASL) in the internal carotid artery transient ischemic attack. Methods According to TIA seizure frequency, 58 patients clinical diagnosed as TIA were divided into single group (n=12) and the frequent group (n=46). All patients underwent MRA and ASL, then intracranial arterial stenosis and cerebral perfusion were evaluated. Results Vascular stenosis with abnormal ASL were detected in 33 (71.74%) of 46 frequent TIA patients and 1 (8.33%) single TIA patient. The incidence of vascular stenosis with abnormal ASL was higher in frequent TIA than that in single TIA (P＜0.05). Conclusion Vascular stenosis with perfusion abnormality is one of the most risk factors of TIA frequent seizures. Combination of MRA and ASL can make judgment for stenosis and abnormality of cerebral blood flow, being helpful to understand the onset causes and prognosis of TIA.