Citation, DOI, disclosures and article data
At the time the article was created Usman Bashir had no recorded disclosures.View Usman Bashir's current disclosures
At the time the article was last revised Craig Hacking had no recorded disclosures.View Craig Hacking's current disclosures
Temporal resolution relates to the duration of time for acquisition of a single frame of a dynamic process, i.e., cine imaging.
The concept of temporal resolution is fundamental to cardiac CT and MRI, in which a rapidly beating heart is imaged over the order of milliseconds into multiple frame-captures. In MRI, the time gap between consecutive images indicates the temporal resolution which is given by the formula:
Temporal resolution = VPS × TR
- VPS = views per segment - a user-defined variable and
- TR = time to repetition.
So, for example, if the TR is 10 ms and there are 5 views per segment, the temporal resolution would be 50 ms.
In cardiac CT, a temporal resolution of 250 ms means that a single image is acquired over 250 ms of the cardiac cycle, i.e., 4 images during a single cycle at a heart rate of 60 beats per minute. With modern dual-phase CT scanners, temporal resolutions as low as 42 ms have become possible, enabling better evaluation of regional wall motion.
- 1. Brodoefel H, Kramer U, Reimann A et-al. Dual-source CT with improved temporal resolution in assessment of left ventricular function: a pilot study. AJR Am J Roentgenol. 2007;189 (5): 1064-70. doi:10.2214/AJR.07.2228 - Pubmed citation
- 2. Slavin GS, Bluemke DA. Spatial and temporal resolution in cardiovascular MR imaging: review and recommendations. Radiology. 2005;234 (2): 330-8. doi:10.1148/radiol.2342031990 - Pubmed citation