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31 lip 2024 · CT head, also known as CT brain, refers to a computed tomography (CT) examination of the brain and surrounding cranial structures. It is most commonly performed as a non-contrast study, but the addition of a contrast-enhanced phase is performed for some indications.
13 maj 2023 · What follows is merely a suggested approach to interpreting a CT of the head. An important aspect of this approach is the use of windowing to maximize pickup rate. With PACS, windowing the scan to optimize detection of certain pathology is simple and should be routine.
23 mar 2023 · check scan can occur in the agreed-upon portion of the R-R interval within the patient's current heart rate; typically in mid-diastole in lower heart rates <70 bpm; mid-diastole to end-systole at higher heart rates of 70-80 bpm. a more reliable way to ensure end-systole is setting the timing to ms rather than percentage i.e. 350ms
lower heart rates allow the use of lower dose scan acquisitions that are not possible at higher heart rates. Heart rate control strategies are well established and the appropriate strategy is dependent on a number of variables
One rule of thumb for the target heart rate is 'the first number is a five', i.e. an ideal heart rate between 50 and 59 beats per minute. While this goal is not achieved in every patient, it provides a useful reference frame.
Heart rate adaptive optimization of spatial and temporal resolution for electrocardiogram-gated multi-slice spiral CT of the heart.
Traditional CCTA requires heart rate (HR) control to minimise cardiac motion artifact. New software allows for coronary lumen delineation at faster HR. Methods.
