1. A composition comprising iodinated radiopaque agent and a pharmaceutically acceptable carrier or excipient, wherein the iodine concentration in the composition is at least 100 mg l / ml.2. The composition of claim 1 wherein the radiopaque agent is an iodinated nonionic monomeric, dimeric, trimeric, tetrameric or pentameric soedinenie.3. A composition according to claim 1 or 2, wherein the radiopaque agent is iodixanol or a compound of formula II: 4. A composition comprising iodinated radiopaque agent and a pharmaceutically acceptable carrier or excipient, wherein the iodine concentration in the composition is 10-170 mg l / ml, for use in the method of X-ray, comprising: introducing the composition into the body, effects on the dose of X-radiation provided with strain energy in the tube in the range of 70-140 kVp (peak voltage in kV) study of an organism using the diagnostic device ikompilirovanie issledovaniya.5 data. X-ray examination method comprising: administering a composition comprising a radiopaque agent, wherein the iodine concentration in the composition is 10-170 mg l / ml, effects on the dose of X-radiation provided with a tube voltage power in the range of 70-140 kVp, investigation organism using the diagnostic device ikompilirovanie issledovaniya.6 data. A method according to claim 5, wherein the iodine concentration in the composition is at least 150 mg l / ml, and preferably at least 100 mg l / ml.7. A method according to claim 5, the reinforcing contrasting effect of the contrast agent, wherein the contrast agent is iodized and where AUC1. Композиция, содержащая йодированный рентгеноконтрастный агент и фармацевтически приемлемый носитель или эксципиент, где концентрация йода в композиции составляет менее 100 мг l/мл.2. Композиция по п.1, где рентгеноконтрастный агент представляет собой неионное йодированное мономерное, димерное, тримерное, тетрамерное или пентамерное соединение.3. Композиция по п.1 или 2, где рентгеноконтрастный агент представляет
