Background and aim: The efficacy of treatment in brain stroke is strictly time-dependent, and the development of rapid and non-invasive neurodiagnostic tools for the identification of brain lesions is crucial. Here we assess sensitivity, specificity, accuracy and safety of a new technology, the TESHT temnograph, in the identification of brain lesions in comparison to traditional CT and MRI scans. The temnograph is based on microwave emissions and requires the use of a light headset, representing a significant advancement in non-invasiveness and cost-effectiveness of neuroimaging diagnostics. Methods: Ninety-eight nursing home patients (48M, 50F, age:30-85) with ischemic or hemorraghic stroke and a recent MRI and/or TC scan underwent a TESHT scan. The accuracy, specificity, sensitivity of brain lesions identification was compared between the 3 scans. Results: In relation to the previous CT or MRI scans, TESHT showed 100% sensitivity, specificity and accuracy in the detection of prior and recent brain lesions. Moreover, the absolute safety of the tool was confirmed (100%), with no adverse events reported either by patients or technicians. Conclusions: The TESHT temnograph appears to be a highly promising tool for the faster and less invasive diagnosis of brain lesions secondary to stroke, compared to traditional neuroimaging tools such as MRI and CT. Its accuracy, sensitivity and specificity in diagnosis indicates TESHT as a significant advancement in neuroimaging technology, allowing earlier and safer diagnosis in of cerebrovascular diseases.