dcmri.relaxivity#
- dcmri.relaxivity(field_strength=3.0, tissue='plasma', agent='gadoxetate', type='T1') float[source]#
Contrast agent relaxivity values in units of Hz/M
- Parameters:
field_strength (float, optional) – Field strength in Tesla. Defaults to 3.0.
tissue (str, optional) – Tissue type - options are ‘plasma’, ‘hepatocytes’. Defaults to ‘plasma’.
agent (str, optional) – Generic contrast agent name, all lower case. Examples are ‘gadobutrol’, ‘gadobenate’, etc.. Defaults to ‘gadoxetate’.
type (str, optional) – transverse (T2 or T2*) or longitudinal (T1) relaxivity. Defaults to ‘T1’.
- Returns:
relaxivity in Hz/M or 1/(sec*M)
- Return type:
Note
This library is in construction and not all known values are currently available through this function.
- Available contrasts:
T1
- Available tissues:
blood
plasma
hepatocytes
- Available agents:
gadopentetate
gadobutrol
gadoteridol
gadobenade
gadoterate
gadodiamide
mangafodipir
gadoversetamide
ferucarbotran
ferumoxide
gadoxetate
- Available field strengths:
0.47
1.5
3
4.7
7.0 (gadoxetate)
9.0 (gadoxetate)
- Sources:
Rohrer M, et al. Comparison of Magnetic Properties of MRI Contrast Media Solutions at Different Magnetic Field Strengths. Investigative Radiology 40(11):p 715-724, November 2005. DOI: 10.1097/01.rli.0000184756.66360.d3
Szomolanyi P, et al. Comparison of the Relaxivities of Macrocyclic Gadolinium-Based Contrast Agents in Human Plasma at 1.5, 3, and 7 T, and Blood at 3 T. Invest Radiol. 2019 Sep;54(9):559-564. doi: 10.1097/RLI.0000000000000577
Example
>>> import dcmri as dc >>> print('The plasma relaxivity of gadobutrol at 3T is', 1e-3*dc.relaxivity(3.0, 'plasma', 'gadobutrol'), 'Hz/mM') The plasma relaxivity of gadobutrol at 3T is 5.0 Hz/mM
