A solution is provided for analyzing the body part of the patient and the body part is perfused with a contrast agent that circulates in the patient and can be substantially fixed to the biological target before performing the method. The corresponding method (A1-A18) comprises the steps of (A1-A2) providing at least one filtered image comprising a plurality of filtered values for corresponding positions of a body part, (A1-A2) comprising an indication of a fixed contrast agent at a substantially reduced corresponding position, generating a thresholded image comprising a plurality of thresholded values corresponding to the filtered values A17), the thresholded image is generated by setting each thresholded value to a corresponding filtered value, or by setting the filtered value to a reset value according to a comparison of the amplitude threshold, a corresponding candidate of the amplitude threshold (A3-A7), generating a plurality of candidate images corresponding to candidate thresholds, wherein each candidate threshold comprises a plurality of candidate values corresponding to a filtered value Wherein each candidate image is generated by setting each candidate value to a corresponding filtered value or by setting the filtered value to a reset value according to the comparison of the candidate threshold values, (A9-A14), wherein the comparison value of each candidate image is a candidate value in a fixed region corresponding to a group of positions containing a significant amount of fixed contrast agent, Calculating a peak value of the comparison value (A15), and setting an amplitude threshold value according to a peak of the comparison value (A16)； calculating a peak value of the comparison value based on the comparison of the candidate value in the cyclic region corresponding to at least a portion .환자의 신체 부위를 분석하기 위한 해법이 제공되며, 신체 부위는 상기 방법을 수행하기 전에 환자 안을 순환하고 생물학적 표적에 실질적으로 고정될 수 있는 조영제로 관류된다. 상응하는 방법(A1-A18)은 신체 부위의 상응하는 위치에 대한 복수의 필터링된 값을 포함하는 적어도 하나의 필터링된 영상
