Abstract: [Problems] Provision of a system for assisting diagnosis/treatment of stroke which can easily provide supportive information so that the type of stroke can be determined appropriately and corresponding treatment strategy can be implemented. [Solutions] When the device for assisting diagnosis/treatment of stroke 101 acquires information of CT images, DWI, ADCmap, and MRA images indicating state of stroke from the device for providing information about state of stroke 103, it uses the acquired information of images and the information about laboratory findings to determine the type of stroke in a unit of stroke type determiner trained to use the predetermined information of images and the predetermined information about laboratory findings to determine the type of stroke corresponding thereto.

Abstract: A magnetic powder contains first magnetic particles, second magnetic particles having a particle size larger than a particle size of the first magnetic particles, and resin. At least one portion of each of the second magnetic particles is covered by the resin and the first magnetic particles. Coverage (L1/L2)?0.42 holds, where L1 is a sum of particle sizes of the first magnetic particles covering the second magnetic particle and L2 is a perimeter of the second magnetic particle.

Abstract: A magnetic compact includes first magnetic particles, second magnetic particles with larger particle sizes than the first magnetic particles, and a resin. The area ratios calculated for multiple regions of the magnetic compact have a standard deviation of 0.40 or less, where area ratio=(total area of first magnetic particles)/(total area of second magnetic particles).