Abstract: The present invention provides a radiolabeled compound represented by the following formula (1), which is a radioactive imidazothiadiazole derivative compound having an affinity for CA-IX, or a salt thereof. wherein n is an integer of 1 to 4, and L represents a radionuclide or a mono- to tetravalent group containing a radionuclide.

Abstract: It is intended to provide a novel amino acid organic compound which can be used as a labeling precursor compound for radioactive halogen-labeled amino acid compounds including [18F]FACBC, and which prevents methanol from remaining in the radioactive halogen-labeled amino acid compounds produced therefrom. The novel amino acid organic compound is a compound represented by the following formula: wherein n is an integer of 0 or of 1 to 4; R1 is an ethyl, 1-propyl or isopropyl substituent; X is a halogen substituent or a group represented by —OR2; R2 is a straight-chain or branched-chain haloalkylsulfonic acid substituent with one to 10 carbon atoms, trialkylstannyl substituent with 3 to 12 carbon atoms, fluorosulfonic acid substituent or aromatic sulfonic acid substituent; and R3 is a protective group.

Abstract: The present invention relates to a labeling technique which can facilitate the metabolism in the liver after administration to patients without the reduction in the antibody function, thereby reducing accumulation of radionuclides in an organ such as the liver, and provides a modified antibody containing an IgG antibody and an IgG-binding peptide bound to the IgG antibody. The IgG-binding peptide has an amino acid sequence consisting of 13 to 17 amino acid residues, such as GPDCAYH(Xaa1)GELVWCTFH wherein Xaa1 represents a lysine residue, a cysteine residue, an aspartic acid residue, a glutamic acid residue, 2-aminosuberic acid, or diaminopropionic acid, and a compound represented by the following formula (II-1) is linked at a position of the lysine residue via a modification linker to the N terminus of the IgG-binding peptide.

Abstract: It is intended to provide a novel amino acid organic compound which can be used as a labeling precursor compound for radioactive halogen-labeled amino acid compounds including [18F]FACBC, and which prevents methanol from remaining in the radioactive halogen-labeled amino acid compounds produced therefrom. The novel amino acid organic compound is a compound represented by the following formula: wherein n is an integer of 0 or of 1 to 4; R1 is an ethyl, 1-propyl or isopropyl substituent; X is a halogen substituent or a group represented by —OR2; R2 is a straight-chain or branched-chain haloalkylsulfonic acid substituent with one to 10 carbon atoms, trialkylstannyl substituent with 3 to 12 carbon atoms, fluorosulfonic acid substituent or aromatic sulfonic acid substituent; and R3 is a protective group.

Abstract: Provided are a compound represented by the following formula (1): wherein X1 represents a hydrogen atom or a halogen atom, X2 represents a fluorine atom or a nitrile group, and X3 represents a radioactive halogen atom, or a salt thereof, and a medicament including the same.

Abstract: There is provided a diagnostic imaging agent for early bone metastasis from cancer, containing trans-1-amino-[18F]fluorocyclobutanecarboxylic acid or a pharmaceutically acceptable salt thereof as an active ingredient.

Abstract: A simple method for producing a clinically applicable radiopharmaceutical composition containing 1-(2,2-dihydroxymethyl-3-[18F]fluoropropyl)-2-nitroimidazole ([18F]DiFA) or a salt thereof as an active ingredient, is provided which includes a synthesis step of obtaining a crude product of [18F]DiFA from a labeling precursor compound for [18F]DiFA; and a purification step of purifying the crude product, in which the purification step includes purifying [18F]DiFA using two or more different types of reverse phase solid phase extraction cartridges.

Abstract: Provided is a method for producing a radiohalogen-labeled compound, the method comprises: a step in which a radiohalogen-labeling precursor compound (S-L) having a leaving group (L) capable of being nucleophilically substituted by a radioactive halide ion (X?) is subjected to a radiohalogenation reaction to obtain a reaction mixture RM1 which contains the radiohalogen-labeling precursor compound (S-L) and a reaction product (S—X) resulting from the radiohalogenation reaction; a step in which the reaction mixture RM1 is mixed with a polyvalent acid or a salt thereof to obtain a reaction mixture RM2; and a step in which the reaction product (S—X) is purified from the reaction mixture RM2 by a solid phase extraction method.

Abstract: There is provided a labeling precursor compound represented by the general formula (2): wherein S represents a substrate, L represents a straight alkyl group having 1 to 6 carbon atoms which may contain an ether group, R1 and R2 each independently represent a straight or branched alkyl group having 1 to 30 carbon atoms, or a substituted or unsubstituted monocyclic or condensed polycyclic aryl group, R3 each independently represent an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and p represents an integer of 0 to 4.

Abstract: Provided is a method for producing flutemetamol including the steps of: reacting a precursor compound represented by a predetermined general formula with a radioactive fluoride to obtain a 18F labeling compound represented by a predetermined general formula; allowing a strong base to act on the reaction mixture of the above step containing the precursor compound and the 18F labeling compound; after the above step, purifying the 18F labeling compound using a reverse phase solid phase extraction cartridge; and removing a protective group to obtain [18F]flutemetamol.

Abstract: A simple method for producing a clinically applicable radiopharmaceutical composition containing 1-(2,2-dihydroxymethyl-3-[18F]fluoropropyl)-2-nitroimidazole ([18F]DiFA) or a salt thereof as an active ingredient, is provided which includes a synthesis step of obtaining a crude product of [18F]DiFA from a labeling precursor compound for [18F]DiFA; and a purification step of purifying the crude product, in which the purification step includes purifying [18F]DiFA using two or more different types of reverse phase solid phase extraction cartridges.

Abstract: One embodiment of the present invention addresses the problem of reducing the influence of physiological accumulation in monitoring nuclear medical image data. To solve this problem, the embodiment includes: extracting a bone area from CT image data having been positioned with nuclear medical image data; in the nuclear medical image data, displaying the data of an area overlapping the bone area extracted above; and, in the nuclear medical image data, not displaying the data of an area not overlapping the bone area extracted above.

Abstract: The present invention addresses the problem of providing a technique for detecting a lesion of a heart disease in a non-invasive manner. The present invention provides a non-invasive diagnostic imaging agent for a heart disease, which contains a radioactively labeled compound capable of binding to an aldosterone synthase or a salt thereof as an active ingredient.

Abstract: [Problem to be Solved] To improve stability of automatic normalization of a bone scintigraphy image. [Solution] A preferred embodiment includes: creating a pixel value histogram of image data representing a bone scintigraphy image; setting a plurality of thresholds related to pixel values based on the pixel value histogram; calculating respective average pixel values for the set thresholds; arranging the calculated average pixel values in order from the largest value; and determining a reference value for normalizing the image data based on at least part of a set of the average pixel values arranged in the order. The determining the reference value includes: determining one straight line that approximates a region of small average pixel values out of the set of the average pixel values arranged in the order; and calculating the reference value based on the straight line.

Abstract: Provided is a medicament comprising the compound represented by the following general formula (1) or a salt thereof: In the formula, R1, R2, R3, R4, R5, X1, X2, and X3 are defined. Methods for producing various radioactive compounds are also provided.

Abstract: Provided is a medicament comprising the compound represented by the following general formula (1) or a salt thereof: In the formula, R1, R2, R3, R4, R5, X1, X2, and X3 are defined. Methods for producing various radioactive compounds are also provided.

Abstract: Provided is a highly reliable technique for the evaluation of ischemic conditions. A preferred embodiment is a nuclear medicine measurement protocol in which the administration of a radiopharmaceutical agent and radiation measurement are performed twice at rest and under stress. In the nuclear medicine measurement protocol, radiation collection is performed without radiopharmaceutical agent administration before the second radiopharmaceutical agent administration, and the result is used to correct the nuclear medicine measurement result after the second radiopharmaceutical agent administration.

Abstract: Provided is a method for producing flutemetamol including the steps of: reacting a precursor compound represented by a predetermined general formula with a radioactive fluoride to obtain a 18F labeling compound represented by a predetermined general formula; allowing a strong base to act on the reaction mixture of the above step containing the precursor compound and the 18F labeling compound; after the above step, purifying the 18F labeling compound using a reverse phase solid phase extraction cartridge; and removing a protective group to obtain [18F]flutemetamol.

Abstract: Provided is a compound represented by general formula (1) or a salt thereof as well as a medicine containing the compound or the salt. In the formula, R1, R2, R3, R4, R5, X1, X2, and X3 are defined.

Abstract: The present invention relates to a radioactive iodine-labeled pyrido[1,2-a]benzimidazole derivative compound represented by a definite general formula or a salt thereof, or a radiopharmaceutical comprising the same.