| 摘要 |
A blood-vessel-shape measuring apparatus that can accurately measures a shape of a section of a blood vessel is provided. A blood-vessel-shape calculating means 62 calculates, based on respective echo signals detected by first and second arrays 26, 28 that are placed on a skin 20 of a brachial portion 14 as a portion of a living being such that each of the first and second arrays 26, 28 is across a brachial artery 18 located under the skin 20 , respective positions of respective portions of the arterial wall that are located right below the first and second arrays 26, 28 and correspond to supersonic-wave elements 26 <SUB>n </SUB>of the first array 26 and supersonic-wave elements 28 <SUB>n </SUB>of the second array 28 , and calculates, based on the respective positions of the respective portions of the arterial wall that correspond to the supersonic-wave elements 26 <SUB>n</SUB> , 28 <SUB>n</SUB>, a shape of the brachial artery 18 on an orthogonal section thereof. Thus, even if the brachial artery 18 may run, under the skin 20 , in a direction that is not orthogonal to the first or second array 26, 28 or is not parallel to the skin 20 , an accurate sectional shape of the brachial artery 18 can be obtained.
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