Dynamic analysis apparatus and dynamic analysis system

A dynamic analysis apparatus, comprising:

• a setting section which sets a target region in a lung region of a chest dynamic image which is obtained by radiation imaging;
• a conversion section which calculates a representative value of a pixel signal value in the target region set by the setting section, and converts the pixel signal value in the target region on the basis of the calculated representative value;
• an extraction section which extracts a pulmonary blood flow signal from the chest dynamic image after conversion by the conversion section;
• and
• a calculation section which calculates a change amount of the pulmonary blood flow signal extracted by the extraction section, and calculates a feature amount regarding pulmonary blood flow on the basis of the calculated change amount of the pulmonary blood flow signal wherein
• the extraction section extracts the pulmonary blood flow signal by a method using machine learning.