| Indication |
Gadoteridol is an MRI contrast agent used for contrast enhancement
of the brain, spine and surrounding tissues resulting in improved
visualization (compared with unenhanced MRI) of lesions with abnormal
vascularity or those thought to cause a disruption of the normal blood
brain barrier. Gadoteridol can also be used for whole body contrast
enhanced MRI including the head, neck, liver, breast, musculoskeletal
system and soft tissue pathologies. |
| Pharmacodynamics |
Not Available |
| Mechanism of action |
Based on the behavior of protons when placed in a strong magnetic
field, which is interpreted and transformed into images by magnetic
resonance (MR) instruments. Paramagnetic agents have unpaired electrons
that generate a magnetic field about 700 times larger than the proton's
field, thus disturbing the proton's local magnetic field. When the local
magnetic field around a proton is disturbed its relaxation process is
altered. MR images are based on proton density and proton relaxation
dynamics. MR instruments can record two different relaxation processes,
the T1 (spin-lattice or longitudinal relaxation time) and T2 (spin-spin
or transverse relaxation time). In MRI, visualization of normal and
pathological brain tissue depends in part on variations in the
radiofrequency signal intensity that occur with changes in proton
density, alteration of the T1, and variation in T2. When placed in a
magnetic field, gadoteridol shortens the T1 relaxation time in tissues
where it accumulates. Gadoteridol does not cross the intact blood-brain
barrier; therefore, it does not accumulate in normal brain tissue or in
central nervous system (CNS) lesions that have not caused an abnormal
blood-brain barrier (e.g., cysts, mature post-operative scars). Abnormal
vascularity or disruption of the blood-brain barrier allows
accumulation of gadoteridol in lesions such as neoplasms, abscesses, and
subacute infarcts. |
| Absorption |
Not Available |
| Volume of distribution |
|
| Protein binding |
Not Available |
| Metabolism |
Not Available |
| Route of elimination |
Gadoteridol is eliminated in the urine with 94.4 ± 4.8% (mean ± SD) of the dose excreted within 24 hours post-injection. |
| Half life |
Distribution 12 minutes (mean), elimination 100 minutes (mean). |
| Clearance |
- 1.50+/- 0.35 mL/ min/kg
- renal cl=1.41 +/- 0.33 mL/ min/kg
|
| Toxicity |
Not Available |
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