2013年2月6日 · Brain magnetic resonance imaging (MRI) is the preferred and most sensitive modality after transient ischemic attack (TIA) or minor stroke. It should include diffusion-weighted imaging (DWI) and should be completed within 24 hours of symptom onset 1, 2; its use is 3-fold.

2025年3月25日 · Transient ischemic attacks (TIAs) describe a transient episode of neurological dysfunction caused by focal brain, spinal cord, or retinal ischemia, without acute infarction. In the past, transient ischemic attack was arbitrarily distinguished from stroke by the duration of neurological symptoms of less than 24 hours 1.

With the development of brain imaging, particularly diffusion weighted imaging-magnetic resonance imaging (DWI-MRI), the diagnosis of TIA changed from time-based definition to a tissue-based one. DWI-MRI became a mandatory tool in the TIA workup.

Just how effective is an MRI at detecting a transient ischemic attack or TIA? Well, when compared to a CT scan, an MRI “is more sensitive when evaluating someone for a TIA or stroke,” says Rob Lapporte, MD, who is board certified in emergency medicine.

1997年7月1日 · Magnetic Resonance Imaging. Magnetic resonance imaging (MRI) of the head is used less often than CT for initial evaluation of patients with TIA because it is a more expensive, time-consuming diagnostic modality and is less available. However, MRI has certain advantages.

2024年11月8日 · Studies have shown that TIA patients with evidence of acute infarction on MRI had a 3 to 18 times higher risk of stroke compared to those without acute infarction. Therefore, it is crucial to treat TIA as a medical emergency and initiate immediate evaluation and secondary prophylaxis to prevent a future stroke.

2012年9月15日 · Transient ischemic attack is defined as transient neurologic symptoms without evidence of acute infarction. It is a common and important risk factor for future stroke,...

Magnetic resonance imaging (MRI) is proposed as the preferred imaging modality to investigate patients with transient ischemic attack (TIA). This is mainly based on a higher yield of small acute ischemic lesions; however, direct prospective comparisons are lacking.

Brain magnetic resonance imaging (MRI) is the preferred and most sensitive modality after transient ischemic attack (TIA) or minor stroke. It should include diffusion-weighted imaging (DWI) and should be completed within 24 hours of symptom onset1,2; its use is 3-fold.

2015年2月1日 · Neuroimaging is critical in the evaluation of patients with transient ischemic attack (TIA) and MRI is the recommended modality to image an ischemic lesion. The presence of a diffusion (DWI) lesion in a patient with transient neurological symptoms confirms the vascular origin of the deficit and is predictive of a high risk of stroke.