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Code
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Display
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Definition
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113052
|
Mean Transit Time |
The time required for blood to pass through a region of tissue. |
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126397
|
Relative Regional Blood Flow |
The relative flow rate of blood perfusing a region. Obtained by dividing the absolute flow rate of blood perfusing a region by the absolute flow rate of blood perfusing a reference region. |
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126398
|
Relative Regional Blood Volume |
The relative volume of blood perfusing a region. Obtained by dividing the absolute volume of blood perfusing a region by the absolute volume of blood perfusing a reference region. |
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113069
|
Time To Peak |
The time from the start of the contrast agent injection to the maximum enhancement value. |
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126390
|
Absolute Regional Blood Flow |
The absolute flow rate of blood perfusing a region as volume per mass per unit of time. The mass divisor may be approximated by a measurement of volume assuming a tissue density of 1. |
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126391
|
Absolute Regional Blood Volume |
The absolute volume of blood perfusing a region as volume per mass. The mass divisor may be approximated by a measurement of volume assuming a tissue density of 1. |
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126392
|
Oxygen Extraction Fraction |
The percent of the oxygen removed from the blood by tissue during its passage through the capillary network. For example, as measured by blood oxygenation level dependent (BOLD) MR. See He, Xiang, and Dmitriy A. Yablonskiy. "Quantitative BOLD: Mapping of Human Cerebral Deoxygenated Blood Volume and Oxygen Extraction Fraction: Default State." Magnetic Resonance in Medicine 57, no. 1 (2007): 115-26. |
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113084
|
Tmax |
The time delay to the maximum of the residue function after deconvolution.Shih LC, Saver JL, Alger JR, Starkman S, Leary MC, Vinuela F, et al. Perfusion-Weighted Magnetic Resonance Imaging Thresholds Identifying Core, Irreversibly Infarcted Tissue. Stroke. 2003 Jun 1;34(6):1425-30. doi:10.1161/01.STR.0000072998.70087.E9. Østergaard L, Weisskoff RM, Chesler DA, Gyldensted C, Rosen BR. High resolution measurement of cerebral blood flow using intravascular tracer bolus passages. Part I: Mathematical approach and statistical analysis. Magnetic Resonance in Medicine. 1996;36(5):715-25. doi:10.1002/mrm.1910360510. |