The quantity contrast-weighted sensitivity has been introduced as our figure of merit to factor in sensitivity while selecting the developer with the best contrast.
This is then compared with the density time curve of the tissue being analysed, also obtained by placing an ROI, to distinguish between the quantity of contrast agent within blood vessels (vascular compartment) and the quantity of contrast agent present in the interstitium (extravascular/intracellular compartment).
The mean transit time (MTT) in each ROI was determined as ∑(0– ∞) Ct/∑(0– ∞) C, where C is the quantity of contrast medium remaining at the site and t is the time after the contrast media is injected.
In addition, the predicted quantities in contrast with real quantities should have a linear relation and consistent slope.
Among the procedural data, only duration of the procedure (shorter in the direct stenting group), the number of balloons used, and the quantity of contrast agent (lower in the direct stenting group) were significantly different between the 2 groups (P <.05).
This is then compared with the time-density curve of the tissue being analysed in order to distinguish between the quantity of contrast agent within the blood vessels (vascular compartment) and the quantity present in the interstitium (extra vascular/extra cellular compartment) [ 23].
The tracheo- and bronchoesophageal fistulas in dogs previously reported were diagnosed with plain thoracic radiographs after barium CS study [ 2- 4, 14], indicating that the defect had probably been relatively large in diameter, since a visible quantity of contrast material flowing through it.
Because 96% isotopically enriched boron is available in large quantities in contrast to 3He, 10B-converter based neutron detector technology is one of the very few technological alternatives to 3He in view of the imminent crisis in world-wide supply of 3He.
This strategy represents a straightforward approach to the synthesis of our target compounds given that the donor can be easily obtained in large quantities in contrast to the multi-step preparation of other galactosyl donors.
Furthermore, rhesus monkeys are capable of representing zero as well as equality when two identical quantities are contrasted.
