Detection method, detection system and recording medium

A detection system that detects a detection target magnetic particle using an excitation magnetic field, the detection system comprising a processor to execute information processing for selecting the detection target magnetic particle from candidate magnetic particles,

• wherein the processor
• acquires a first curve indicating a relationship between a Neel relaxation time and a particle diameter for the candidate magnetic particles;
• acquires a second curve indicating a relationship between a Brownian relaxation time and a particle diameter for the candidate magnetic particles;
• specifies a particle diameter corresponding to an intersection of the first curve and the second curve as an intersection particle diameter, and
• selects a candidate magnetic particle having a particle diameter larger than the intersection particle diameter as the detection target magnetic particle.

A non-transitory computer-readable recording medium on which a computer program is recorded, the computer program supporting a detection system detecting a detection target magnetic particle using an excitation magnetic field, the computer program causing a computer to execute:

• acquiring a first curve indicating a relationship between a Neel relaxation time and a particle diameter for candidate magnetic particles;
• acquiring a second curve indicating a relationship between a Brownian relaxation time and the particle diameter for the candidate magnetic particles;
• specifying a particle diameter corresponding to an intersection of the first curve and the second curve as an intersection particle diameter;
• and
• selecting a candidate magnetic particle having the particle diameter larger than the intersection particle diameter as the detection target magnetic particle.