HRMRIHigh-Resolution Magnetic Resonance Imaging
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Earlier studies of hrMRI showed that calcitoninsalmon nasal spray helped maintain trabecular microarchitecture vs.
Both hrMRI and hr-pQCT are being used experimentally to assess cortical bone porosity, which affects bone stability.
The hr-pQCT scanners image only peripheral sites such as small areas of the radius and tibia and possibly the calcaneus, while hrMRI covers larger areas of the radius, tibia, and possibly the femur.
Although hrMRI gives no densitometric data, some studies suggest it may be used to analyze bone marrow composition through spectroscopy in order to assess bone stability.
To our knowledge, reports regarding the features of both lumen and vessel wall through HRMRI in the early recanalization is rare.
The aims of this study were to compare plaque's morphological characteristics and distribution pattern between the symptomatic and asymptomatic groups using 3.0 T HRMRI and to investigate risk factors of posterior ischemic events in patients with BA stenosis > 50%.
All patients signed an informed consent before the HRMRI examinations.
HRMRI has good blood suppression properties and high sampling efficiency [15].
Mean time interval between onset of clinical symptoms and HRMRI scan was 13.4 days (range from 1 to 28 days).
Other clinical characteristics and HRMRI findings did not differ between both groups.
HRMRI can clearly show the location of plaques; prospective studies are needed to monitor the progression of plaque's enlargement on the vessel wall.
Patients with plaques located near the ostia of penetrating vessels are presumably prone to perforator stroke after stenting due to “snow-plowing” effect.[sup][35],[36],[37],[38],[39],[40],[41],[42] Furthermore, lesions with negative remodeling may face vessel injury more frequently comparing with lesions with positive remodeling as described in the coronary arteries, resulting in vessel dissection or hemorrhage.[sup][32] A new morphological classification based on HRMRI could be established for global assessment of risk of endovascular therapy.