摘要:
An embodiment includes analyzing a body part perfused with a contrast agent, which has been pre-administered as a bolus to circulate through the body-part with at least a first passage during an analysis interval. The analyzing includes providing at least one input signal indicative of a response to an interrogation signal of a corresponding location of the body part during the analysis interval, and fitting each input signal over the analysis interval by an instance of a combined bolus function of time, based on a combination of a first simple bolus function of time modeling the first passage of the contrast agent and at least one second simple bolus function of time each one modeling a corresponding second passage of the contrast agent.
摘要:
Suspension of gas-filled microvesicles comprising a targeting ligand for binding to KDR or VEGF/KDR complex. The suspension is obtained by reconstituting a freeze-dried residue with a carbohydrate-containing solution in the presence of a physiologically acceptable gas and is stabilized by the presence of histidine.
摘要:
An embodiment is proposed for analyzing a body-part perfused with a contrast agent, which has been pre-administered as a bolus to circulate through the body-part with a first passage and possibly with at least one second passage during an analysis interval. A corresponding data-processing method includes the steps of providing at least one input signal indicative of a response to an interrogation signal of a corresponding location of the body-part during the analysis interval, and fitting each input signal over the analysis interval by an instance of a combined bolus function of time, based on a combination of a first simple bolus function of time modeling the first passage of the contrast agent and at least one second simple bolus function of time each one modeling a corresponding second passage of the contrast agent, being defined by the values of a set of first fitting parameters of the first simple bolus function, a set of second fitting parameters of each second simple bolus function and a delay parameter of each second simple bolus function with respect to the first simple bolus function. In an embodiment, the step of fitting each input signal includes estimating a peak instant of the input signal when the corresponding response reaches an absolute peak, setting a truncation interval within the analysis interval according to the peak instant, fitting a truncated signal defined by the input signal over the truncation interval by an instance of a truncated simple bolus function of time, modeling a single passage of the contrast agent during the truncation interval, being defined by the values of a set of truncated fitting parameters, and initializing the first fitting parameters, the second fitting parameters of each second simple bolus function and the delay parameter of each second simple bolus function according to the values of the truncated fitting parameters.
摘要:
Image enhancing contrast agents for use in diagnostic and/or therapeutic methods, particularly in the form of gas-filled microvesicles, with enhanced stability. The gas-filled microvesicles are stabilized by a layer of amphiphilic material and comprise from 0.15% to 1.0% by moles of a lipid bearing a hydrophilic polymer. The lipid bearing a hydrophilic polymer is preferably a phospholipid linked to polyethyleneglycol.
摘要:
Peptide vectors having high KDR binding affinity and processes for making such vectors are provided. The peptide vectors may be conjugated to phospholipids and included in ultrasound contrast agent compositions. Such ultrasound contrast agents are particularly useful in therapeutic and diagnostic methods, such as in imaging KDR-containing tissue and in the evaluation and treatment of angiogenic processes associated with neoplastic conditions. The present invention also provides processes for the large scale production of highly pure dimeric and monomeric peptide phospholipid conjugates as well as precursor materials used to form the conjugates. The present invention further provides processes for the large scale production of highly pure peptide phospholipid conjugates which contain very low levels of TFA.
摘要:
Gas-filled microvesicles associated with a polypeptide comprising a sequence of amino acids, said sequence exhibiting binding affinity for selectins, particularly p-selectin. The gas-filled microvesicles can be used in ultrasound imaging.
摘要:
A system for facilitating the detection of an immobilized contrast agent in medical imaging applications is proposed. The system includes means for providing a sequence of a total number of input images obtained at corresponding acquisition instants by imaging a body-part of a patient subjected to an administration of a contrast agent capable of circulating within the patient and of being substantially immobilized on a biological target, each input image including a plurality of input values each one indicative of a response to an interrogation signal of a corresponding portion of the body-part possibly including said contrast agent, and means for reducing a contribution of the circulating contrast agent within the body-part in at least one selected input image; the means for reducing includes means for creating a filtered image corresponding to each selected input image by replacing a set of input values of the selected input image with a set of corresponding filtered values, each filtered value being representative of the lowest response of the corresponding portion of the body-part in a set of multiple input images including the selected input image, the set of multiple input images consisting of a number of input images lower than the total number.
摘要:
New targeting or therapeutic compounds which can be incorporated into a composition of gas-filled microvesicles. The invention further relates to gas-filled microvesicles for diagnostic and/or therapeutic use comprising said compounds and to their method of use. The new compounds are compounds of formula M-S-T, wherein: M represents a component capable of associating with an envelope of a gas-filled microvesicle; T represents a component comprising a targeting ligand or a therapeutic agent; and S represents a component comprising at least two bissulfone groups.
摘要:
A device for administering a liquid preparation comprising a pharmaceutical agent, particularly a contrast agent, in the form of a bolus. The device comprises in particular a core cylinder and an external cylinder, the core cylinder comprising a conduit (107) and a cylindrical reservoir (108) cooperating with a respective plunger (109), wherein the plunger is modified in order to operatively engage with guiding means (300) provided on the external cylinder.
摘要:
Gas-filled microvesicles comprising an antigen bound thereto and to aqueous suspensions containing said microvesicles, for use in immunomodulating formulations, in particular as a vaccine. The antigen is covalently bound to a component of the microvesicles envelope. The microvesicles of the invention, comprising a molar excess of fatty acids in the stabilizing envelope, are particularly effective in the uptake by antigen-presenting cells, in particular dendritic cells.